Cooling device utilizing evaporative latent heat, mist spray amount control method and control program

Abstract

To provide a cooling device for cooling a target by utilizing evaporative latent heat of mist which is atomized in the air.SOLUTION: A cooling device consists of: a spray nozzle which sprays mist; a main stream air supply section which supplies main stream air; a chamber in which cooling air is produced by mixing the mist and the main stream air and evaporating the mist; a cooling air injection section by which the cooling air is injected out of the chamber and made collide with a cooling target; a temperature sensor which is installed in a chamber entrance and detects a temperature TS of the main stream air in the chamber entrance; a temperature sensor which is installed in the cooling target and detects a temperature TT of the cooling target; and a control section for controlling a supply amount M of mist to be sprayed from the spray nozzle. The present invention also relates to a method and a program for controlling the cooling device.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a cooling device that cools an object with air that has been cooled by utilizing the latent heat of evaporation of the mist sprayed into the air after the mist has completely evaporated, and to a method and program that controls the amount of mist sprayed into the air in accordance with the environmental conditions (temperature, humidity) of the site where the mist is sprayed, by simulating a state in which the mist sprayed into the air has completely evaporated. [Background technology]

[0002] 2. Description of the Related Art Conventionally, research has been widely conducted on impingement jet heat transfer, in which a fluid is jetted at high speed and impinges on the surface of an object in order to cool the object. Also, a technique is known in which water is sprayed as a mist into a jet-like air flow in order to improve cooling efficiency. Most of these techniques are based on the premise that the mist will adhere to the object to be cooled, i.e., the object to be cooled will become wet.

[0003] For example, Patent Document 1 discloses a cooling device and a cooling method comprising a cooling mechanism having a heat exchanger arranged in an air blowing space to air-cool a specified cooling medium, and a spray mechanism that sprays water onto the heat exchanger. This eliminates waste of sprayed water and makes the most efficient use of the spray under required conditions, thereby improving cooling performance and achieving energy savings.

[0004] However, for example, if the battery in a hybrid car becomes wet due to the mist adhering to it, there is a risk that the electrical system will short out or the components will rust, so conventional cooling technologies, which assume that the battery will get wet, cannot be used. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Patent Publication No. 2021-092370 Summary of the Invention [Problem to be solved by the invention]

[0006] Therefore, the present invention has been made in consideration of the above-mentioned problems, and has an objective to provide a cooling device that cools an object with air that has been cooled by utilizing the latent heat of evaporation of the mist sprayed into the air after the mist has completely evaporated, and a method and program for controlling the amount of mist sprayed into the air in accordance with the environmental conditions (temperature, humidity) of the site where the mist is sprayed, by simulating a state in which the mist sprayed into the air has completely evaporated. [Means for solving the problem]

[0007] In order to solve the above problems, the present invention provides the following technical solutions.

[0008] The cooling device according to the present invention, which cools an object to be cooled by utilizing the latent heat of vaporization of mist, is as follows: A spray nozzle for spraying a mist; A mainstream air supply unit for supplying mainstream air; A chamber that mixes the mist with mainstream air and evaporates the mist to create cooled air; a cooling air ejection section that ejects cooling air from within the chamber to collide with an object to be cooled; The temperature of the mainstream air at the chamber inlet, T S A temperature sensor for detecting The humidity of the mainstream air at the chamber inlet, H S A humidity sensor for detecting the humidity; It is installed on the object to be cooled and the temperature T T A temperature sensor for detecting A control unit that controls the supply amount M of mist sprayed from the spray nozzle; It consists of: The control unit: a measurement value input step of receiving an input of a value measured when cooling is performed; a setting value input step for accepting input of a preset value; Based on the values ​​entered in the measurement value input step and the setting value input step, The evaporation rate m of the mist is estimated according to the combination of the mass conservation and material diffusion model in the following equation, and the latent heat of evaporation Q ev and an evaporation amount calculation step of calculating an amount of water vapor. m / 4π=R M B.D. va ln(1+Z) (In the formula, Z represents the Spaulding mass diffusion coefficient, which indicates the diffusion rate of water vapor into air.) Based on the values ​​entered in the measurement value input step and the setting value input step, According to the following equation, the assumed temperature of the mainstream air at each position in the chamber is T M Based on the amount of water vapor calculated in the evaporation calculation step, the estimated humidity H M A step of calculating an assumed temperature and humidity of the mainstream air; Bc p (T M , i -T M , i-1 ) / t=Q ev,i +Q in,i (In the formula, Q ev,i represents the latent heat of vaporization determined in the evaporation calculation step, and Q in,i =AK(T S -T M,i ) represents the endotherm from the outside of the chamber to the inside of the chamber. In the present invention, the subscripts i and i-1 indicate the number of calculations. Therefore, "T M , i " is the i-1th T M The i-th T determined based on M It means.) The evaporation amount calculation step and the assumed temperature and humidity of the mainstream air calculated in the assumed temperature and humidity calculation step Latent heat of vaporization Q ev, water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M and, Thermal conductivity L, specific heat at constant pressure c p , density of mainstream air B, water vapor diffusion coefficient D va and, Based on this, From the chamber inlet to the chamber outlet, for each position z=Vt at time t in the chamber Assumed mainstream air temperature T M and the assumed droplet diameter R M While continuously calculating At the chamber exit, Assumed mainstream air temperature T M,O and the assumed droplet diameter R M,O An expected value calculation step of calculating As a result of the calculation of the assumed value calculation step, A cooling judgment step in which it is judged by the following two judgment phases whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet can cool the object to be cooled; Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O a first judgment phase in which the mist is judged to be "not completely evaporated" at the chamber outlet when the threshold value is 0.1 micrometers or more; T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase determines that cooling is not possible. As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor has completely evaporated and the second judgment phase determines that the vapor cannot be cooled, the corrected mist supply virtual amount "M n " to ">M n-1 ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M n "of" <M n-1 ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, a step of outputting a result indicating that cooling by mist is insufficient and an overheating state will occur and issuing a warning by an alarm when it is determined in the first determination phase that "complete evaporation has not occurred" and in the second determination phase that "cooling is not possible"; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor has completely evaporated and the second judgment phase determines that the vapor can be cooled, the initial mist supply virtual amount M1 or the corrected mist supply virtual amount M n " as a supply amount M to be sprayed, and spraying the mist of the supply amount M from the spray nozzle; By executing The sprayed mist is completely evaporated to create cooling air, and the mist is supplied at a supply volume M that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object. It is characterized by:

[0009] The method of controlling the amount of mist sprayed to cool an object to be cooled by utilizing the latent heat of vaporization of the mist according to the present invention comprises the steps of: a measurement value input step of receiving an input of a value measured when cooling is performed; a setting value input step for accepting input of a preset value; Based on the values ​​entered in the measurement value input step and the setting value input step, The evaporation rate m of the mist is estimated according to the combination of the mass conservation and material diffusion model in the following equation, and the latent heat of evaporation Q ev and an evaporation amount calculation step of calculating an amount of water vapor. m / 4π=R M B.D. va ln(1+Z) (In the formula, Z represents the Spaulding mass diffusion coefficient, which indicates the diffusion rate of water vapor into air.) Based on the values ​​entered in the measurement value input step and the setting value input step, According to the following equation, the assumed temperature of the mainstream air at each position in the chamber is T M Based on the amount of water vapor calculated in the evaporation calculation step, the estimated humidity H M A step of calculating an assumed temperature and humidity of the mainstream air; Bc p (T M , i -T M , i-1 ) / t=Q ev,i +Q in,i (In the formula, Q ev,i represents the latent heat of vaporization determined in the evaporation calculation step, and Q in,i =AK(T S -T M,i ) represents the heat absorption from the outside of the chamber to the inside of the chamber. The evaporation amount calculation step and the assumed temperature and humidity of the mainstream air calculated in the assumed temperature and humidity calculation step Latent heat of vaporization Q ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M and, Thermal conductivity L, specific heat at constant pressure c p , density of mainstream air B, water vapor diffusion coefficient D va and, Based on this, From the chamber inlet to the chamber outlet, for each position z=Vt at time t in the chamber Assumed mainstream air temperature T M and the assumed droplet diameter R M While continuously calculating At the chamber exit, Assumed mainstream air temperature T M,O and the assumed droplet diameter R M,O An expected value calculation step of calculating As a result of the calculation of the assumed value calculation step, A cooling judgment step in which it is judged by the following two judgment phases whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet can cool the object to be cooled; Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O a first judgment phase in which the mist is judged to be "not completely evaporated" at the chamber outlet when the threshold value is 0.1 micrometers or more; T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase determines that cooling is not possible. As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor has completely evaporated and the second judgment phase determines that the vapor cannot be cooled, the corrected mist supply virtual amount "M n " to ">M n-1 ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M n "of" <M n-1 ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, a step of outputting a result indicating that cooling by mist is insufficient and an overheating state will occur and issuing a warning by an alarm when it is determined in the first determination phase that "complete evaporation has not occurred" and in the second determination phase that "cooling is not possible"; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor has completely evaporated and the second judgment phase determines that the vapor can be cooled, the initial mist supply virtual amount M1 or the corrected mist supply virtual amount M n " as a supply amount M to be sprayed, and spraying the mist of the supply amount M from the spray nozzle; By executing The sprayed mist is completely evaporated to create cooling air, and the mist is supplied at a supply volume M that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object. It is characterized by:

[0010] A control program for controlling the amount of mist sprayed to cool an object to be cooled by utilizing the latent heat of vaporization of the mist according to the present invention is as follows: In the computer system, a measurement value input step of receiving an input of a value measured when cooling is performed; a setting value input step for accepting input of a preset value; Based on the values ​​entered in the measurement value input step and the setting value input step, The evaporation rate m of the mist is estimated according to the combination of the mass conservation and material diffusion model in the following equation, and the latent heat of evaporation Q evand an evaporation amount calculation step of calculating an amount of water vapor. m / 4π=R M B.D. va ln(1+Z) (In the formula, Z represents the Spaulding mass diffusion coefficient, which indicates the diffusion rate of water vapor into air.) Based on the values ​​entered in the measurement value input step and the setting value input step, According to the following equation, the assumed temperature of the mainstream air at each position in the chamber is T M Based on the amount of water vapor calculated in the evaporation calculation step, the estimated humidity H M A step of calculating an assumed temperature and humidity of the mainstream air; Bc p (T M , i -T M , i-1 ) / t=Q ev,i +Q in,i (In the formula, Q ev,i represents the latent heat of vaporization determined in the evaporation calculation step, and Q in,i =AK(T S -T M,i ) represents the heat absorption from the outside of the chamber to the inside of the chamber. The evaporation amount calculation step and the assumed temperature and humidity of the mainstream air calculated in the assumed temperature and humidity calculation step Latent heat of vaporization Q ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M and, Thermal conductivity L, specific heat at constant pressure c p , density of mainstream air B, water vapor diffusion coefficient D va and, Based on this, From the chamber inlet to the chamber outlet, for each position z=Vt at time t in the chamber The assumed temperature of the mainstream air T M and the assumed droplet diameter R M While continuously calculating At the chamber exit, The assumed temperature of the mainstream air T M,O and the assumed droplet diameter R M,O An expected value calculation step of calculating As a result of the calculation of the assumed value calculation step, A cooling judgment step in which it is judged by the following two judgment phases whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet can cool the object to be cooled; Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O a first judgment phase in which the mist is judged to be "not completely evaporated" at the chamber outlet when the threshold value is 0.1 micrometers or more; T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase determines that cooling is not possible. As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor has completely evaporated and the second judgment phase determines that the vapor cannot be cooled, the corrected mist supply virtual amount "M n " to ">M n-1 ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M n "of" <M n-1", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, a step of outputting a result indicating that cooling by mist is insufficient and an overheating state will occur and issuing a warning by an alarm when it is determined in the first determination phase that "complete evaporation has not occurred" and in the second determination phase that "cooling is not possible"; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor has completely evaporated and the second judgment phase determines that the vapor can be cooled, the initial mist supply virtual amount M1 or the corrected mist supply virtual amount M n " as a supply amount M to be sprayed, and spraying the mist of the supply amount M from the spray nozzle; By executing The sprayed mist is completely evaporated to create cooling air, and the mist is supplied at a supply volume M that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object. It is characterized by: Effect of the Invention

[0011] According to the cooling device of the present invention, which cools an object with air cooled by utilizing the latent heat of evaporation of the mist when the mist sprayed into the air has completely evaporated, and the method and program for controlling the amount of mist sprayed into the air in accordance with the environmental conditions (temperature, humidity) of the site where the mist is sprayed, by simulating a state in which the mist sprayed into the air has completely evaporated, the device can calculate the optimal mist supply amount according to the usage environment, and has the effect of safely cooling the object to be cooled without getting it wet. [Brief description of the drawings]

[0012] [Figure 1] Image showing the outline of the cooling device configuration [Diagram 2] A flow diagram showing the control procedure in a control unit of a cooling device and a method and program for controlling the amount of mist sprayed into the air. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] The following describes in detail with reference to the drawings an embodiment of a cooling device according to the present invention, which cools an object with air cooled by utilizing the latent heat of evaporation of the mist when the mist sprayed into the air has completely evaporated, and a method and program for controlling the amount of mist sprayed into the air in accordance with the environmental conditions (temperature, humidity) of the site where the mist is sprayed, assuming a state in which the mist sprayed into the air has completely evaporated.

[0014] FIG. 1 is a schematic diagram showing the configuration of a cooling device according to this embodiment.

[0015] The cooling device according to this embodiment is A spray nozzle for spraying a mist; A mainstream air supply unit for supplying mainstream air; A chamber that mixes the mist with mainstream air and evaporates the mist to create cooled air; a cooling air ejection section that ejects cooling air from within the chamber to collide with an object to be cooled; The temperature of the mainstream air at the chamber inlet, T S A temperature sensor for detecting The humidity of the mainstream air at the chamber inlet, H S A humidity sensor for detecting the humidity; It is installed on the object to be cooled and the temperature T T A temperature sensor for detecting A control unit that controls the supply amount M of mist sprayed from the spray nozzle; It is composed of: The supply amount M means the actual supply amount.

[0016] The control unit executes the following steps.

[0017] The value measured during cooling (the temperature of the mainstream air at the chamber inlet T S and humidity H S, the temperature of the object to be cooled without mist spraying T T,I ) measurement input step.

[0018] The preset value (time t, upper limit temperature T T,H , initial mist supply virtual amount M1, initial droplet diameter R1, flow velocity V of mainstream air supplied from the mainstream air supply into the chamber, heat transfer coefficient K, surface area A of the chamber (t, T T,H This is a setting value input step that accepts inputs of (is a fixed value, M1 is an arbitrary value, R1, V, K, and A are values ​​based on the performance of the cooling device).

[0019] Based on the values ​​entered in the measurement value input step and the set value input step, the evaporation rate m of the mist is estimated according to a combination of the mass conservation and material diffusion model in the following equation 1, and the latent heat of evaporation Q ev and an evaporation amount calculation step for calculating the amount of water vapor. (The measurement value input step and the set value input step can be omitted, and in the evaporation amount calculation step, the mist evaporation rate m can be estimated based on the values ​​measured during cooling and the values ​​set in advance, and the latent heat of evaporation Qev and the amount of water vapor can be calculated.)

[0020]

number

[0021] Based on the values ​​entered in the measurement value input step and the set value input step, the expected mainstream air temperature T for each position in the chamber is calculated according to the energy conservation in the gas phase in the following equation 2. M Based on the amount of water vapor calculated in the evaporation calculation step above, the estimated humidity H M A step for calculating the assumed temperature and humidity of the mainstream air.

[0022]

number

[0023] The latent heat of evaporation Q calculated in the evaporation amount calculation step and the assumed temperature and humidity calculation step of the mainstream air ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M , thermal conductivity L, specific heat at constant pressure c p , density of mainstream air B, water vapor diffusion coefficient D va Based on this, The assumed temperature T of the mainstream air in the chamber at each position z=Vt at time t from the chamber inlet to the chamber outlet. M and the assumed droplet diameter R M While continuously calculating the assumed temperature T of the mainstream air at the chamber outlet, M,O and the assumed droplet diameter R M,O An expected value calculation step for calculating:

[0024] As a result of the calculation of the assumed value calculation step, A cooling judgment step in which the next two judgment phases (first and second) are used to judge whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet is capable of cooling the object to be cooled.

[0025] Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O The first judgment phase determines that the mist has not "completely evaporated" at the chamber outlet when the threshold value is 0.1 micrometers or more.

[0026] T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase begins, determining that "cooling is not possible."

[0027] As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor has completely evaporated and the second judgment phase determines that the vapor cannot be cooled, the corrected mist supply virtual amount "M n " (n=2, n=3, . . .) to ">M n-1 ", repeating the assumed value calculation step, and performing the cooling determination step again.

[0028] As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M n " (n=2, n=3, ...) to " <M n-1 ", repeating the assumed value calculation step, and performing the cooling determination step again.

[0029] As a result of the determination in the cooling determination step, If the first determination phase determines that "complete evaporation has not occurred" and the second determination phase determines that "cooling is not possible," a step of outputting a result indicating that cooling by mist is insufficient and that an overheating state will occur and issuing a warning by an alarm.

[0030] As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor has completely evaporated and the second judgment phase determines that the vapor can be cooled, the initial mist supply virtual amount M1 or the corrected mist supply virtual amount M n ” (n=2, n=3, ...) as the supply amount M to be sprayed, and a step of spraying the mist of the supply amount M from the spray nozzle.

[0031] The time t is a value to be calculated for each position z = Vt where the cooling air moves in the chamber, and the heat transfer coefficient K is the temperature difference ΔT = T S -T MThe amount of heat transferred from the outside of the chamber to the inside of the chamber through the chamber wall is q [W / m2] = KΔT, which is a value specific to the device. The latent heat of vaporization Q ev means the amount of evaporation.

[0032] By the control unit executing the above steps, the cooling device of this embodiment creates cooling air in a state where the sprayed mist has completely evaporated, and can supply a supply amount M of mist that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object to be cooled.

[0033] Next, a method for controlling the amount of mist sprayed will be described according to an implementation procedure.

[0034] The method for controlling the amount of mist sprayed according to this embodiment is as follows: A spray nozzle for spraying a mist; A mainstream air supply unit for supplying mainstream air; A chamber that mixes the mist with mainstream air and evaporates the mist to create cooled air; a cooling air ejection section that ejects cooling air from within the chamber to collide with an object to be cooled; The temperature of the mainstream air at the chamber inlet, T S A temperature sensor for detecting The humidity of the mainstream air at the chamber inlet, H S A humidity sensor for detecting the humidity; It is installed on the object to be cooled and the temperature T T A temperature sensor for detecting In the cooling device having the above configuration, the amount of mist sprayed is controlled by the following procedure.

[0035] When spraying mist onto an object to be cooled, a mist is installed at the chamber entrance in advance, and the temperature T S A temperature sensor detects the humidity H S The temperature of the main air at the chamber inlet T S and humidity H S Measure. In addition, it is installed on the object to be cooled, and the temperature T T The temperature sensor detects the temperature T of the object to be cooled without spraying mist. T,I Measure. These measured values ​​are entered manually.

[0036] Next, the previously set time t and the upper heat resistance temperature T T,H , initial mist supply virtual amount M1, initial droplet diameter R1, flow velocity V of mainstream air supplied from the mainstream air supply into the chamber, heat transfer coefficient K, surface area A of the chamber (t, T T,H is a fixed value, M1 is an arbitrary value, and R1, V, K, and A are values ​​based on the performance of the cooling device) are manually entered.

[0037] Based on these manually input measured values ​​and set values, the evaporation rate m of the mist is estimated according to a combination of the mass conservation and material diffusion model in the following equation 3, and the latent heat of evaporation Q ev and calculate the amount of water vapor.

[0038]

number

[0039] Based on the above measured and set values, the assumed temperature T of the mainstream air at each position in the chamber is calculated according to the energy conservation in the gas phase in the following equation 4. M Based on the amount of water vapor calculated by the above formula 3, the estimated humidity H M Calculate.

[0040]

number

[0041] The calculated latent heat of vaporization Q ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. Mand expected humidity H M and, Thermal conductivity L, specific heat at constant pressure c p , density of mainstream air B, water vapor diffusion coefficient D va and, Based on this, From the chamber inlet to the chamber outlet, for each position z=Vt at time t in the chamber Assumed mainstream air temperature T M and the assumed droplet diameter R M While continuously calculating At the chamber exit, Assumed mainstream air temperature T M,O and the assumed droplet diameter R M,O Calculate.

[0042] The assumed temperature of the mainstream air at the chamber exit, T M,O and the assumed droplet diameter R M,O As a result of calculating The next two judgment phases (first and second) judge whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet can cool the object to be cooled.

[0043] Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O When the threshold value is 0.1 micrometers or more, the mist is determined to be "not completely evaporated" at the chamber outlet (first determination phase).

[0044] T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, it is determined that "cooling is not possible" (second determination phase).

[0045] As a result of the judgment, If the first judgment phase determines that the vapor has completely evaporated and the second judgment phase determines that the vapor cannot be cooled, the corrected mist supply virtual amount "M n " to ">M n-1 " and amended the above "Assumed temperature T of the mainstream air at the chamber outlet M,O and the assumed droplet diameter R M,O " is repeatedly calculated and the above determination is made again.

[0046] In addition, as a result of the judgment, If the first judgment phase determines that "the vapor is not completely evaporated" and the second judgment phase determines that "cooling is possible," the corrected mist supply virtual amount "M n "of" <M n-1 " and amended the above "Assumed temperature T of the mainstream air at the chamber outlet M,O and the assumed droplet diameter R M,O " is repeatedly calculated and the above determination is made again.

[0047] However, as a result of the judgment, If the first determination phase determines that "complete evaporation has not occurred" and the second determination phase determines that "cooling is not possible," a result is output indicating that cooling by mist is insufficient and that overheating will occur, and an alarm is issued as a warning.

[0048] As a result of the judgment, If the first judgment phase determines that the vapor has completely evaporated and the second judgment phase determines that the vapor can be cooled, the initial mist supply virtual amount M1 or the corrected mist supply virtual amount M n " is determined to be the "supply amount M to be sprayed", and the mist of the supply amount M is sprayed from the spray nozzle.

[0049] By carrying out the above steps, cooling air is created in a state in which the sprayed mist is completely evaporated, and the supply amount M of mist can be controlled so that the cooling air can be sprayed onto the object to be cooled without wetting the object.

[0050] Next, the control program for the mist spray amount will be described according to the operation procedure.

[0051] By having the computer system that controls the amount of mist sprayed execute the following steps, it is possible to create cooling air in which the sprayed mist has completely evaporated, and to control the amount of mist supply M that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object.

[0052] The value measured during cooling (the temperature of the mainstream air at the chamber inlet T S and humidity H S , the temperature of the object to be cooled without mist spraying T T,I ) measurement input step.

[0053] The preset value (time t, upper limit temperature T T,H , initial mist supply virtual amount M1, initial droplet diameter R1, flow velocity V of mainstream air supplied from the mainstream air supply into the chamber, heat transfer coefficient K, surface area A of the chamber (t, T T,H This is a setting value input step that accepts inputs of (is a fixed value, M1 is an arbitrary value, R1, V, K, and A are values ​​based on the performance of the cooling device).

[0054] Based on the values ​​entered in the measurement value input step and the setting value input step, The evaporation rate m of the mist is estimated according to the combination of the mass conservation and material diffusion model in the following equation 5, and the latent heat of evaporation Q ev and an evaporation amount calculation step for calculating the amount of water vapor. (The measurement value input step and the set value input step can be omitted, and in the evaporation amount calculation step, the mist evaporation rate m can be estimated based on the values ​​measured during cooling and the values ​​set in advance, and the latent heat of evaporation Qev and the amount of water vapor can be calculated.)

[0055]

number

[0056] Based on the values ​​entered in the measurement value input step and the setting value input step, According to the energy conservation in the gas phase in the following equation 6, the assumed temperature of the mainstream air at each position in the chamber, T M Based on the amount of water vapor calculated in the evaporation calculation step above, the estimated humidity H M A step for calculating the assumed temperature and humidity of the mainstream air.

[0057]

number

[0058] The evaporation amount calculation step and the assumed temperature and humidity of the mainstream air calculated in the assumed temperature and humidity calculation step Latent heat of vaporization Q ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M and, Thermal conductivity L, specific heat at constant pressure c p , density of mainstream air B, water vapor diffusion coefficient D va and, Based on this, From the chamber inlet to the chamber outlet, for each position z=Vt at time t in the chamber The assumed temperature of the mainstream air T M and the assumed droplet diameter R M While continuously calculating At the chamber exit, The assumed temperature of the mainstream air T M,O and the assumed droplet diameter R M,O An expected value calculation step for calculating:

[0059] As a result of the calculation of the assumed value calculation step, A cooling judgment step in which the next two judgment phases (first and second) are used to judge whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet is capable of cooling the object to be cooled.

[0060] Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O The first judgment phase determines that the mist has not "completely evaporated" at the chamber outlet when the threshold value is 0.1 micrometers or more.

[0061] T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase begins, determining that "cooling is not possible."

[0062] As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor has completely evaporated and the second judgment phase determines that the vapor cannot be cooled, the corrected mist supply virtual amount "M n " (n=2, n=3, . . .) to ">M n-1 ", repeating the assumed value calculation step, and performing the cooling determination step again.

[0063] As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M n " (n=2, n=3, ...) to " <M n-1 ", repeating the assumed value calculation step, and performing the cooling determination step again.

[0064] As a result of the determination in the cooling determination step, If the first determination phase determines that "complete evaporation has not occurred" and the second determination phase determines that "cooling is not possible," a step of outputting a result indicating that cooling by mist is insufficient and that an overheating state will occur and issuing a warning by an alarm.

[0065] As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor has completely evaporated and the second judgment phase determines that the vapor can be cooled, the initial mist supply virtual amount M1 or the corrected mist supply virtual amount M n ” (n=2, n=3, ...) as the supply amount M to be sprayed, and a step of spraying the mist of the supply amount M from the spray nozzle.

[0066] The time t is a value to be calculated for each position z = Vt where the cooling air moves in the chamber, and the heat transfer coefficient K is the temperature difference ΔT = T S -T M The amount of heat transferred from the outside of the chamber to the inside of the chamber through the chamber wall is q [W / m2] = KΔT, which is a value specific to the device. The latent heat of vaporization Q ev means the amount of evaporation.

[0067] When an experiment was conducted using the mist spray amount control program according to the present embodiment, for example, T S =31.0℃, H S Under the condition of 82.0% RH, M n = 5.5 mg / s of mist can cool the system by 1.1 °C, and T S =25.5℃, H S Under the condition of =78.0 %RH, M n The results showed that a cooling of 0.8 °C was possible by supplying mist at a rate of 5.5 mg / s.

[0068] Therefore, in the control program for the mist spray amount according to this embodiment, the following T S =35.0℃, H S= 53.0 % RH and Cairo (Egypt) in summer. S = 41.0 °C, H S The calculation process used to obtain the cooling judgment step judgment for each of the conditions of RH = 13.0% is detailed below.

[0069] <Evaporation amount calculation step> In the evaporation amount calculation step, an analysis process is performed on each droplet. If we assume that the mist is spherical and introduce a spherically symmetric boundary condition, the law of conservation of mass gives us Equation 7, and if we introduce the assumption of a quasi-steady state, the law of conservation of mass can be rewritten as Equation 8.

[0070]

number

[0071]

number

[0072] Similarly, under the assumption of a quasi-steady state, the conservation of substance in the gas phase can be expressed as Equation 9, the conservation of energy as Equation 10, and the conservation of enthalpy as Equation 11.

[0073]

number

[0074]

number

[0075]

number

[0076] Moreover, when the boundary condition, Equation 12, is introduced into Equation 9, it is expressed as Equation 13.

[0077]

number

[0078]

number

[0079] If we define the Spaulding mass transport coefficient Z as in Eq. 14, JPEG2025075240000015.jpg710 is the water vapor mass fraction at the mist surface, JPEG2025075240000016.jpg711 can be expressed as the water vapor mass fraction at infinity, as shown in Equation 15.

number

[0080]

number

[0081] From the above, Equation 13 is expressed as Equation 16, and Y F << 1, it is expressed as in Equation 17.

[0082]

number

[0083]

number

[0084] <Steps for calculating the assumed temperature and humidity of mainstream air> In the step of calculating the assumed temperature and humidity of the mainstream air, the i-1th T M and H M The assumed temperature T of the mainstream air at each position in the chamber at the i-th time determined based on M and expected humidity H M The liquid phase is analyzed by calculating

[0085] Heat transfer by thermal conduction from the droplet surface to the gas phase can be expressed by applying the conservation of enthalpy as shown in Equation 18. When JPEG2025075240000022.jpg1111 is negligibly small, it is expressed as equation 19, that is, the latent heat of vaporization is transported to the gas phase.

[0086]

number

[0087]

number

[0088] <Analysis for gas phase> Assuming a steady state for a small test volume, negligible viscous dissipation, and one-dimensional flow negligible heat conduction in the gas phase, the equation can be expressed by Equation 20 by introducing the first law of thermodynamics.

[0089]

number

[0090] When Equation 20 is discretized using the Euler backward method, it is expressed as Equation 21.

[0091]

number

[0092] Here, T M,1=T S Therefore, for example, when assuming Tokyo in summer, in the measurement value input step, T M,i =T S If you enter a measured value of 35.0°C and assume that you are in Cairo (Egypt) in summer, in the measurement value input step, M,1 =T S Enter a measured value of =41.0°C.

[0093] Then, to solve Equation 21, the function of Equation 22 is introduced.

[0094]

number

[0095] For Equation 21 to hold, T M,i It is necessary to determine: So, first, the assumption Place JPEG2025075240000028.jpg814 and the corresponding Calculate JPEG2025075240000029.jpg1032 using equation 23.

[0096]

number

[0097] <Calculation step for estimated value> Estimated temperature T of the mainstream air in the chamber at each position z = Vt at time t from the chamber inlet to the chamber outlet M and the assumed droplet diameter R M While continuously calculating the assumed temperature T of the mainstream air at the chamber outlet, M,O and the assumed droplet diameter R M,O Calculate.

[0098] The specific calculation procedure is as follows. The assumed droplet diameter R of the mainstream air at each position z = Vt in the chamber at time t from the chamber inlet to the chamber outlet.M is calculated as in Equation 24.

[0099]

number

[0100] Z in Equation 24 i-1 is calculated using Equation 25.

[0101]

number

[0102] Here, Equation 25 is calculated under the following conditions: JPEG2025075240000033.jpg2470JPEG2025075240000034.jpg2554JPEG2025075240000035.jpg49122

[0103] Here, when i=1, JPEG2025075240000036.jpg1514 is the humidity H of the mainstream air at the chamber inlet. S For example, if you imagine Tokyo in summer, in the measurement input step, If you input JPEG2025075240000037.jpg1764 and assume that you are in Cairo (Egypt) in the summer, in the measurement value input step, The input file would be JPEG2025075240000038.jpg1764.

[0104] Also, JPEG2025075240000039.jpg1749 (wherein wb represents the wet bulb temperature.) Therefore, To solve JPEG2025075240000040.jpg1578, we introduce into it the function G defined in Equation 26.

[0105]

number

[0106] Here, G=0. JPEG2025075240000042.jpg816 is calculated using the iterative calculation formula of Equation 27.

[0107]

number

[0108] Furthermore, Equation 26 can be rewritten as follows: Continue until you get JPEG2025075240000044.jpg861. The "0.01" in this formula represents the threshold for determining whether or not convergence has occurred. In other words, by repeating the calculation, the difference between T for n+1 and T for n becomes smaller and converges. Therefore, a threshold value of 0.01°C was set for determining whether convergence had occurred.

[0109] Next is T. M,i For the determination of JPEG2025075240000045.jpg816 is calculated by the iterative calculation formula of Equation 28.

[0110]

number

[0111] Furthermore, Equation 28 can be rewritten as follows: Continue until JPEG2025075240000047.jpg1050.

[0112] Fulfill this JPEG2025075240000048.jpg1016 is T M,i (The estimated temperature T of the mainstream air in the chamber at each position z=Vt at time t from the chamber inlet to the chamber outlet, calculated by the i-th calculation. M). This "T M,i " and the assumed droplet diameter of the mainstream air for each position z = Vt in the chamber at time t from the chamber inlet to the chamber outlet, calculated by Equation 24, "R M,i " and "T" are calculated continuously for each position z to obtain the assumed temperature of the mainstream air at the chamber outlet. M,O " and the expected droplet diameter "R M,O The process of calculating " is the "estimated value calculation step."

[0113] The calculation process in each of the above steps is performed after the setting value input step. By executing the mist spray amount control program of this embodiment, the cooling judgment step, the first judgment phase, the corrected mist supply virtual amount "M n " to ">M n-1 " and repeat the step of calculating the assumed value, and then perform the step of determining the cooling determination step again and the step of determining the corrected mist supply virtual amount "M n "of" <M n-1 " and repeat the assumed value calculation step, and then repeat the "step of determining the cooling judgment step" again. As a result, the "step of spraying mist with a supply amount M from the spray nozzle" was set to T, which is a simulation of Tokyo in summer. S =35.0℃, H S Under the condition of =53.0 %RH, M n A mist supply of 15.0 mg / s can cool the room by 2.2 °C, and the cooling rate is 2.2 °C, which is the same as the T S = 41.0 °C, H S Under the condition of 13.0% RH, M n The results showed that a cooling of 7.4 °C was possible by supplying mist at a rate of 40.0 mg / s. In the embodiment of this control program, the heat-resistant upper limit temperature T T,H Since this is not set, the "second judgment phase" and the "step of outputting the result indicating that an overheating state will occur and issuing a warning by alarm" are not executed, and the maximum amount of mist that can be supplied is output as the supply amount M from the spray nozzle.

[0114] The above calculation process according to this embodiment is also performed in the mist spray amount control method and the control unit of the cooling device, and the same results can be obtained.

Claims

1. A cooling device that cools an object to be cooled by utilizing the latent heat of evaporation of mist, A spray nozzle for spraying a mist; A mainstream air supply unit for supplying mainstream air; A chamber that mixes the mist with mainstream air and evaporates the mist to create cooled air; a cooling air ejection section that ejects cooling air from within the chamber to collide with an object to be cooled; The temperature of the mainstream air at the chamber inlet, T S A temperature sensor for detecting The humidity of the mainstream air at the chamber inlet, H S A humidity sensor for detecting the humidity; It is placed on the object to be cooled and measures the temperature T T A temperature sensor for detecting A control unit that controls the supply amount M of mist sprayed from the spray nozzle; It consists of: The control unit: Based on the values ​​measured during cooling and the values ​​set in advance, the evaporation rate m of the mist is estimated and the latent heat of evaporation Q ev and an evaporation amount calculation step of calculating an amount of water vapor. The expected mainstream air temperature T at each position in the chamber based on the measured values ​​during cooling and the preset values. M Based on the amount of water vapor calculated in the evaporation calculation step, the estimated humidity H M A step of calculating an assumed temperature and humidity of the mainstream air; The latent heat of evaporation Q calculated in the evaporation amount calculation step and the assumed temperature and humidity calculation step of the mainstream air ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M Based on this, The assumed temperature T of the mainstream air in the chamber at each position z=Vt at time t from the chamber inlet to the chamber outlet. M and the assumed droplet diameter R M While continuously calculating The assumed temperature of the mainstream air at the chamber exit, T M,O and the assumed droplet diameter R M,O An expected value calculation step of calculating As a result of the calculation of the assumed value calculation step, A cooling judgment step in which it is judged by the following two judgment phases whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet can cool the object to be cooled; Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O a first determination phase in which the mist is determined to be “not completely evaporated” at the chamber outlet when the threshold value of is 0.1 micrometers or more; T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase determines that cooling is not possible. As a result of the determination in the cooling determination step, When it is determined in the first judgment phase that "the vapor is completely evaporated" and in the second judgment phase that "cooling is not possible", the corrected mist supply virtual amount "M ｎ " to ">M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M ｎ " to "<M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, a step of outputting a result indicating that cooling by mist is insufficient and an overheating state will occur and issuing a warning by an alarm when it is determined in the first determination phase that "complete evaporation has not occurred" and in the second determination phase that "cooling is not possible"; As a result of the determination in the cooling determination step, When it is determined in the first determination phase that "the vapor has completely evaporated" and in the second determination phase that "cooling is possible", the initial mist supply virtual amount M １ Or the corrected mist supply virtual amount "M ｎ " as "amount of mist to be sprayed M" and spraying the mist of the amount of mist to be sprayed M from the spray nozzle; By executing The sprayed mist is completely evaporated to create cooling air, and the mist is supplied at a supply volume M that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object. A cooling device characterized by:

2. A cooling device that cools an object to be cooled by utilizing the latent heat of evaporation of mist, A spray nozzle for spraying a mist; A mainstream air supply unit for supplying mainstream air; A chamber that mixes the mist with mainstream air and evaporates the mist to create cooled air; a cooling air ejection section that ejects cooling air from within the chamber to collide with an object to be cooled; The temperature of the mainstream air at the chamber inlet, T S A temperature sensor for detecting The humidity of the mainstream air at the chamber inlet, H S A humidity sensor for detecting the humidity; It is placed on the object to be cooled and measures the temperature T T A temperature sensor for detecting A control unit that controls the supply amount M of mist sprayed from the spray nozzle; It consists of: The control unit: a measurement value input step of receiving an input of a value measured when cooling is performed; a setting value input step for accepting input of a preset value; Based on the values ​​entered in the measurement value input step and the set value input step, the evaporation rate m of the mist is estimated, and the latent heat of evaporation Q ev and an evaporation amount calculation step of calculating an amount of water vapor. Based on the values ​​entered in the measurement value input step and the set value input step, the expected mainstream air temperature T M Based on the amount of water vapor calculated in the evaporation calculation step, the estimated humidity H M A step of calculating an assumed temperature and humidity of the mainstream air; The latent heat of evaporation Q calculated in the evaporation amount calculation step and the assumed temperature and humidity calculation step of the mainstream air ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M Based on this, The assumed temperature T of the mainstream air in the chamber at each position z=Vt at time t from the chamber inlet to the chamber outlet. M and the assumed droplet diameter R M While continuously calculating The assumed temperature of the mainstream air at the chamber exit, T M,O and the assumed droplet diameter R M,O An expected value calculation step of calculating As a result of the calculation of the assumed value calculation step, A cooling judgment step in which it is judged by the following two judgment phases whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet can cool the object to be cooled; Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O a first determination phase in which the mist is determined to be “not completely evaporated” at the chamber outlet when the threshold value of is 0.1 micrometers or more; T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase determines that cooling is not possible. As a result of the determination in the cooling determination step, When it is determined in the first judgment phase that "the vapor is completely evaporated" and in the second judgment phase that "cooling is not possible", the corrected mist supply virtual amount "M ｎ " to ">M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M ｎ " to "<M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, a step of outputting a result indicating that cooling by mist is insufficient and an overheating state will occur and issuing a warning by an alarm when it is determined in the first determination phase that "complete evaporation has not occurred" and in the second determination phase that "cooling is not possible"; As a result of the determination in the cooling determination step, When it is determined in the first determination phase that "the vapor has completely evaporated" and in the second determination phase that "cooling is possible", the initial mist supply virtual amount M １ Or the corrected mist supply virtual amount "M ｎ " as "amount of mist to be sprayed M" and spraying the mist of the amount of mist to be sprayed M from the spray nozzle; By executing The sprayed mist is completely evaporated to create cooling air, and the mist is supplied at a supply volume M that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object. A cooling device characterized by:

3. A cooling device that cools an object to be cooled by utilizing the latent heat of evaporation of mist, A spray nozzle for spraying a mist; A mainstream air supply unit for supplying mainstream air; A chamber that mixes the mist with mainstream air and evaporates the mist to create cooled air; a cooling air ejection section that ejects cooling air from within the chamber to collide with an object to be cooled; The temperature of the mainstream air at the chamber inlet, T S A temperature sensor for detecting The humidity of the mainstream air at the chamber inlet, H S A humidity sensor for detecting the humidity; It is placed on the object to be cooled and measures the temperature T T A temperature sensor for detecting A control unit that controls the supply amount M of mist sprayed from the spray nozzle; It consists of: The control unit: a measurement value input step of receiving an input of a value measured when cooling is performed; a setting value input step for accepting input of a preset value; Based on the values ​​entered in the measurement value input step and the setting value input step, The evaporation rate m of the mist is estimated according to the combination of the mass conservation and material diffusion model in the following equation, and the latent heat of evaporation Q ev and an evaporation amount calculation step of calculating an amount of water vapor. m / 4π=R M BD va ln(1+Z) (In the formula, Z represents the Spaulding mass diffusion coefficient, which indicates the diffusion rate of water vapor into air.) Based on the values ​​entered in the measurement value input step and the setting value input step, According to the following equation, the assumed temperature of the mainstream air at each position in the chamber is T M Based on the amount of water vapor calculated in the evaporation calculation step, the estimated humidity H M A step of calculating an assumed temperature and humidity of the mainstream air; Bc ｐ (T Ｍ , i -T Ｍ , i-１ ) / t=Q ev,i +Q in,i (In the formula, Q ev,i represents the latent heat of vaporization determined in the evaporation calculation step, and Q in,i =AK(T S -T M,i ) represents the heat absorption from the outside of the chamber to the inside of the chamber. The evaporation amount calculation step and the assumed temperature and humidity of the mainstream air calculated in the assumed temperature and humidity calculation step Latent heat of vaporization Q ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M and, Thermal conductivity L, specific heat at constant pressure c ｐ , density of mainstream air B, water vapor diffusion coefficient D ｖａ and, Based on this, From the chamber inlet to the chamber outlet, for each position z=Vt at time t in the chamber The assumed temperature of the mainstream air T M and the assumed droplet diameter R M While continuously calculating At the chamber exit, The assumed temperature of the mainstream air T M,O and the assumed droplet diameter R M,O An expected value calculation step of calculating As a result of the calculation of the assumed value calculation step, A cooling judgment step in which it is judged by the following two judgment phases whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet can cool the object to be cooled; Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O a first determination phase in which the mist is determined to be “not completely evaporated” at the chamber outlet when the threshold value of is 0.1 micrometers or more; T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase determines that cooling is not possible. As a result of the determination in the cooling determination step, When it is determined in the first judgment phase that "the vapor is completely evaporated" and in the second judgment phase that "cooling is not possible", the corrected mist supply virtual amount "M ｎ " to ">M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M ｎ " to "<M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, a step of outputting a result indicating that cooling by mist is insufficient and an overheating state will occur and issuing a warning by an alarm when it is determined in the first determination phase that "complete evaporation has not occurred" and in the second determination phase that "cooling is not possible"; As a result of the determination in the cooling determination step, When it is determined in the first determination phase that "the vapor has completely evaporated" and in the second determination phase that "cooling is possible", the initial mist supply virtual amount M １ Or the corrected mist supply virtual amount "M ｎ " as "amount of mist to be sprayed M" and spraying the mist of the amount of mist to be sprayed M from the spray nozzle; By executing The sprayed mist is completely evaporated to create cooling air, and the mist is supplied at a supply volume M that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object. A cooling device characterized by:

4. A method for controlling a mist spray amount for cooling an object to be cooled by utilizing the latent heat of vaporization of the mist, comprising: Based on the values ​​measured during cooling and the values ​​set in advance, the evaporation rate m of the mist is estimated and the latent heat of evaporation Q ev and an evaporation amount calculation step of calculating an amount of water vapor. The expected mainstream air temperature T at each position in the chamber based on the measured values ​​during cooling and the preset values. M Based on the amount of water vapor calculated in the evaporation calculation step, the estimated humidity H M A step of calculating an assumed temperature and humidity of the mainstream air; The latent heat of evaporation Q calculated in the evaporation amount calculation step and the assumed temperature and humidity calculation step of the mainstream air ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M Based on this, The assumed temperature T of the mainstream air in the chamber at each position z=Vt at time t from the chamber inlet to the chamber outlet. M and the assumed droplet diameter R M While continuously calculating The assumed temperature of the mainstream air at the chamber exit, T M,O and the assumed droplet diameter R M,O An expected value calculation step of calculating As a result of the calculation of the assumed value calculation step, A cooling judgment step in which it is judged by the following two judgment phases whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet can cool the object to be cooled; Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O a first determination phase in which the mist is determined to be “not completely evaporated” at the chamber outlet when the threshold value of is 0.1 micrometers or more; T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase determines that cooling is not possible. As a result of the determination in the cooling determination step, When it is determined in the first judgment phase that "the vapor is completely evaporated" and in the second judgment phase that "cooling is not possible", the corrected mist supply virtual amount "M ｎ " to ">M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M ｎ " to "<M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, a step of outputting a result indicating that cooling by mist is insufficient and an overheating state will occur and issuing a warning by an alarm when it is determined in the first determination phase that "complete evaporation has not occurred" and in the second determination phase that "cooling is not possible"; As a result of the determination in the cooling determination step, When it is determined in the first determination phase that "the vapor has completely evaporated" and in the second determination phase that "cooling is possible", the initial mist supply virtual amount M １ Or the corrected mist supply virtual amount "M ｎ " as "amount of mist to be sprayed M" and spraying the mist of the amount of mist to be sprayed M from the spray nozzle; By executing The sprayed mist is completely evaporated to create cooling air, and the mist is supplied at a supply volume M that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object. A method for controlling the amount of mist sprayed.

5. A method for controlling a mist spray amount for cooling an object to be cooled by utilizing the latent heat of vaporization of the mist, comprising: a measurement value input step of receiving an input of a value measured when cooling is performed; a setting value input step for accepting input of a preset value; Based on the values ​​entered in the measurement value input step and the set value input step, the evaporation rate m of the mist is estimated, and the latent heat of evaporation Q ev and an evaporation amount calculation step of calculating an amount of water vapor. Based on the values ​​entered in the measurement value input step and the set value input step, the expected mainstream air temperature T M Based on the amount of water vapor calculated in the evaporation calculation step, the estimated humidity H M A step of calculating an assumed temperature and humidity of the mainstream air; The latent heat of evaporation Q calculated in the evaporation amount calculation step and the assumed temperature and humidity calculation step of the mainstream air ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M Based on this, The assumed temperature T of the mainstream air in the chamber at each position z=Vt at time t from the chamber inlet to the chamber outlet. M and the assumed droplet diameter R M While continuously calculating The assumed temperature of the mainstream air at the chamber exit, T M,O and the assumed droplet diameter R M,O An expected value calculation step of calculating As a result of the calculation of the assumed value calculation step, A cooling judgment step in which it is judged by the following two judgment phases whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet can cool the object to be cooled; Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O a first determination phase in which the mist is determined to be “not completely evaporated” at the chamber outlet when the threshold value of is 0.1 micrometers or more; T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase determines that cooling is not possible. As a result of the determination in the cooling determination step, When it is determined in the first judgment phase that "the vapor is completely evaporated" and in the second judgment phase that "cooling is not possible", the corrected mist supply virtual amount "M ｎ " to ">M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M ｎ " to "<M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, a step of outputting a result indicating that cooling by mist is insufficient and an overheating state will occur and issuing a warning by an alarm when it is determined in the first determination phase that "complete evaporation has not occurred" and in the second determination phase that "cooling is not possible"; As a result of the determination in the cooling determination step, When it is determined in the first determination phase that "the vapor has completely evaporated" and in the second determination phase that "cooling is possible", the initial mist supply virtual amount M １ Or the corrected mist supply virtual amount "M ｎ " as "amount of mist to be sprayed M" and spraying the mist of the amount of mist to be sprayed M from the spray nozzle; By executing The sprayed mist is completely evaporated to create cooling air, and the mist is supplied at a supply volume M that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object. A method for controlling the amount of mist sprayed.

6. A method for controlling a mist spray amount for cooling an object to be cooled by utilizing the latent heat of vaporization of the mist, comprising: a measurement value input step of receiving an input of a value measured when cooling is performed; a setting value input step for accepting input of a preset value; Based on the values ​​entered in the measurement value input step and the setting value input step, The evaporation rate m of the mist is estimated according to the combination of the mass conservation and material diffusion model in the following equation, and the latent heat of evaporation Q ev and an evaporation amount calculation step of calculating an amount of water vapor. m / 4π=R M BD va ln(1+Z) (In the formula, Z represents the Spaulding mass diffusion coefficient, which indicates the diffusion rate of water vapor into air.) Based on the values ​​entered in the measurement value input step and the setting value input step, According to the following equation, the assumed temperature of the mainstream air at each position in the chamber is T M Based on the amount of water vapor calculated in the evaporation calculation step, the estimated humidity H M A step of calculating an assumed temperature and humidity of the mainstream air; Bc ｐ (T Ｍ , i -T Ｍ , i-１ ) / t=Q ev,i +Q in,i (In the formula, Q ev,i represents the latent heat of vaporization determined in the evaporation calculation step, and Q in,i =AK(T S -T M,i ) represents the heat absorption from the outside of the chamber to the inside of the chamber. The evaporation amount calculation step and the assumed temperature and humidity of the mainstream air calculated in the assumed temperature and humidity calculation step Latent heat of vaporization Q ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M and, Thermal conductivity L, specific heat at constant pressure c ｐ , density of mainstream air B, water vapor diffusion coefficient D ｖａ and, Based on this, From the chamber inlet to the chamber outlet, for each position z=Vt at time t in the chamber The assumed temperature of the mainstream air T M and the assumed droplet diameter R M While continuously calculating At the chamber exit, The assumed temperature of the mainstream air T M,O and the assumed droplet diameter R M,O An expected value calculation step of calculating As a result of the calculation of the assumed value calculation step, A cooling judgment step in which it is judged by the following two judgment phases whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet can cool the object to be cooled; Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O a first determination phase in which the mist is determined to be “not completely evaporated” at the chamber outlet when the threshold value of is 0.1 micrometers or more; T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase determines that cooling is not possible. As a result of the determination in the cooling determination step, When it is determined in the first judgment phase that "the vapor is completely evaporated" and in the second judgment phase that "cooling is not possible", the corrected mist supply virtual amount "M ｎ " to ">M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M ｎ " to "<M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, a step of outputting a result indicating that cooling by mist is insufficient and an overheating state will occur and issuing a warning by an alarm when it is determined in the first determination phase that "complete evaporation has not occurred" and in the second determination phase that "cooling is not possible"; As a result of the determination in the cooling determination step, When it is determined in the first determination phase that "the vapor has completely evaporated" and in the second determination phase that "cooling is possible", the initial mist supply virtual amount M １ Or the corrected mist supply virtual amount "M ｎ " as "amount of mist to be sprayed M" and spraying the mist of the amount of mist to be sprayed M from the spray nozzle; By executing The sprayed mist is completely evaporated to create cooling air, and the mist is supplied at a supply volume M that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object. A method for controlling the amount of mist sprayed.

7. A computer system that controls the amount of mist sprayed to cool an object using the latent heat of vaporization of the mist. Based on the values ​​measured during cooling and the values ​​set in advance, the evaporation rate m of the mist is estimated and the latent heat of evaporation Q ev and an evaporation amount calculation step of calculating an amount of water vapor. The expected mainstream air temperature T at each position in the chamber based on the measured values ​​during cooling and the preset values. M Based on the amount of water vapor calculated in the evaporation calculation step, the estimated humidity H M A step of calculating an assumed temperature and humidity of the mainstream air; The latent heat of evaporation Q calculated in the evaporation amount calculation step and the assumed temperature and humidity calculation step of the mainstream air ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M Based on this, The assumed temperature T of the mainstream air in the chamber at each position z=Vt at time t from the chamber inlet to the chamber outlet. M and the assumed droplet diameter R M While continuously calculating The assumed temperature of the mainstream air at the chamber exit, T M,O and the assumed droplet diameter R M,O An expected value calculation step of calculating As a result of the calculation of the assumed value calculation step, A cooling judgment step in which it is judged by the following two judgment phases whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet can cool the object to be cooled; Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O a first determination phase in which the mist is determined to be “not completely evaporated” at the chamber outlet when the threshold value of is 0.1 micrometers or more; T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase determines that cooling is not possible. As a result of the determination in the cooling determination step, When it is determined in the first judgment phase that "the vapor is completely evaporated" and in the second judgment phase that "cooling is not possible", the corrected mist supply virtual amount "M ｎ " to ">M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M ｎ " to "<M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, a step of outputting a result indicating that cooling by mist is insufficient and an overheating state will occur and issuing a warning by an alarm when it is determined in the first determination phase that "complete evaporation has not occurred" and in the second determination phase that "cooling is not possible"; As a result of the determination in the cooling determination step, When it is determined in the first determination phase that "the vapor has completely evaporated" and in the second determination phase that "cooling is possible", the initial mist supply virtual amount M １ Or the corrected mist supply virtual amount "M ｎ " as "amount of mist to be sprayed M" and spraying the mist of the amount of mist to be sprayed M from the spray nozzle; By executing The sprayed mist is completely evaporated to create cooling air, and the mist is supplied at a supply volume M that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object. A program for controlling the amount of mist sprayed.

8. A computer system that controls the amount of mist sprayed to cool an object using the latent heat of vaporization of the mist. a measurement value input step of receiving an input of a value measured when cooling is performed; a setting value input step for accepting input of a preset value; Based on the values ​​entered in the measurement value input step and the set value input step, the evaporation rate m of the mist is estimated, and the latent heat of evaporation Q ev and an evaporation amount calculation step of calculating an amount of water vapor. Based on the values ​​entered in the measurement value input step and the set value input step, the expected mainstream air temperature T M Based on the amount of water vapor calculated in the evaporation calculation step, the estimated humidity H M A step of calculating an assumed temperature and humidity of the mainstream air; The latent heat of evaporation Q calculated in the evaporation amount calculation step and the assumed temperature and humidity calculation step of the mainstream air ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M Based on this, The assumed temperature T of the mainstream air in the chamber at each position z=Vt at time t from the chamber inlet to the chamber outlet. M and the assumed droplet diameter R M While continuously calculating The assumed temperature of the mainstream air at the chamber exit, T M,O and the assumed droplet diameter R M,O An expected value calculation step of calculating As a result of the calculation of the assumed value calculation step, A cooling judgment step in which it is judged by the following two judgment phases whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet can cool the object to be cooled; Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O a first determination phase in which the mist is determined to be “not completely evaporated” at the chamber outlet when the threshold value of is 0.1 micrometers or more; T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase determines that cooling is not possible. As a result of the determination in the cooling determination step, When it is determined in the first judgment phase that "the vapor is completely evaporated" and in the second judgment phase that "cooling is not possible", the corrected mist supply virtual amount "M ｎ " to ">M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M ｎ " to "<M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, a step of outputting a result indicating that cooling by mist is insufficient and an overheating state will occur and issuing a warning by an alarm when it is determined in the first determination phase that "complete evaporation has not occurred" and in the second determination phase that "cooling is not possible"; As a result of the determination in the cooling determination step, When it is determined in the first determination phase that "the vapor has completely evaporated" and in the second determination phase that "cooling is possible", the initial mist supply virtual amount M １ Or the corrected mist supply virtual amount "M ｎ " as "amount of mist to be sprayed M" and spraying the mist of the amount of mist to be sprayed M from the spray nozzle; By executing The sprayed mist is completely evaporated to create cooling air, and the mist is supplied at a supply volume M that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object. A program for controlling the amount of mist sprayed.

9. A computer system that controls the amount of mist sprayed to cool an object using the latent heat of vaporization of the mist. a measurement value input step of receiving an input of a value measured when cooling is performed; a setting value input step for accepting input of a preset value; Based on the values ​​entered in the measurement value input step and the setting value input step, The evaporation rate m of the mist is estimated according to the combination of the mass conservation and material diffusion model in the following equation, and the latent heat of evaporation Q ev and an evaporation amount calculation step of calculating an amount of water vapor. m / 4π=R M BD va ln(1+Z) (In the formula, Z represents the Spaulding mass diffusion coefficient, which indicates the diffusion rate of water vapor into air.) Based on the values ​​entered in the measurement value input step and the setting value input step, According to the following equation, the assumed temperature of the mainstream air at each position in the chamber is T M Based on the amount of water vapor calculated in the evaporation calculation step, the estimated humidity H M A step of calculating an assumed temperature and humidity of the mainstream air; Bc ｐ (T Ｍ , i -T Ｍ , i-１ ) / t=Q ev,i +Q in,i (In the formula, Q ev,i represents the latent heat of vaporization determined in the evaporation calculation step, and Q in,i =AK(T S -T M,i ) represents the heat absorption from the outside of the chamber to the inside of the chamber. The evaporation amount calculation step and the assumed temperature and humidity of the mainstream air calculated in the assumed temperature and humidity calculation step Latent heat of vaporization Q ev , water vapor content, and the assumed temperature T of the mainstream air at each position in the chamber. M and expected humidity H M and, Thermal conductivity L, specific heat at constant pressure c ｐ , density of mainstream air B, water vapor diffusion coefficient D ｖａ and, Based on this, From the chamber inlet to the chamber outlet, for each position z=Vt at time t in the chamber The assumed temperature of the mainstream air T M and the assumed droplet diameter R M While continuously calculating At the chamber exit, The assumed temperature of the mainstream air T M,O and the assumed droplet diameter R M,O An expected value calculation step of calculating As a result of the calculation of the assumed value calculation step, A cooling judgment step in which it is judged by the following two judgment phases whether the mist flowing through the chamber outlet has completely evaporated and whether the mainstream air flowing through the chamber outlet can cool the object to be cooled; Estimated droplet diameter at chamber outlet R M,O When the threshold value is less than 0.1 micrometers, the mist is judged to be "completely evaporated" at the chamber outlet, and the assumed droplet diameter R M,O a first determination phase in which the mist is determined to be “not completely evaporated” at the chamber outlet when the threshold value of is 0.1 micrometers or more; T S -T M,O >T T,I -T T,H If so, it is judged that "cooling is possible" and T S -T M,O <T T,I -T T,H If so, the second judgment phase determines that cooling is not possible. As a result of the determination in the cooling determination step, When it is determined in the first judgment phase that "the vapor is completely evaporated" and in the second judgment phase that "cooling is not possible", the corrected mist supply virtual amount "M ｎ " to ">M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, If the first judgment phase determines that the vapor is not completely evaporated and the second judgment phase determines that the vapor can be cooled, the corrected mist supply virtual amount "M ｎ " to "<M ｎ－１ ", repeating the assumed value calculation step, and performing the cooling determination step again; As a result of the determination in the cooling determination step, a step of outputting a result indicating that cooling by mist is insufficient and an overheating state will occur and issuing a warning by an alarm when it is determined in the first determination phase that "complete evaporation has not occurred" and in the second determination phase that "cooling is not possible"; As a result of the determination in the cooling determination step, When it is determined in the first determination phase that "the vapor has completely evaporated" and in the second determination phase that "cooling is possible", the initial mist supply virtual amount M １ Or the corrected mist supply virtual amount "M ｎ " as "amount of mist to be sprayed M" and spraying the mist of the amount of mist to be sprayed M from the spray nozzle; By executing The sprayed mist is completely evaporated to create cooling air, and the mist is supplied at a supply volume M that can cool the object to be cooled without wetting it even when the cooling air is sprayed onto the object. A program for controlling the amount of mist sprayed.

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