Adsorption refrigeration system, monitoring method thereof, storage medium and product

Abstract

This invention discloses a monitoring method for an adsorption refrigeration system, comprising the following steps: acquiring characteristic parameters of the adsorption bed in the desorption stage of the adsorption refrigeration system, wherein the characteristic parameters characterize the heat flux of the heat source fluid supplied to the adsorption bed in the desorption stage; if the characteristic parameters exceed a first preset parameter value, controlling the cooling capacity of the cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system to increase; and / or, if the characteristic parameters are lower than a second preset parameter value, controlling the cooling capacity of the cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system to decrease. The above-mentioned monitoring method for an adsorption refrigeration system can effectively solve the problem that the working efficiency of an adsorption refrigeration system is significantly affected by changes in the temperature of the heat source fluid. This invention also discloses an adsorption refrigeration system monitoring method, a computer-readable storage medium, and a computer program product.

Description

Technical Field

[0001] This invention relates to the field of adsorption technology, and more specifically, to a method for monitoring an adsorption-cooling system, an adsorption-cooling system using the above-described monitoring method, a computer-readable storage medium storing the adsorption-cooling system monitoring method, and a computer program product using the above-described adsorption-cooling system monitoring method. Background Technology

[0002] Currently, data center air conditioning units mainly rely on the traditional method of converting electrical energy into mechanical energy for cooling. The high power consumption and heat generated by data centers, as well as the inexhaustible natural cooling sources, are not fully utilized. This waste heat utilization cooling solution can make full use of the heat of the data center, without the need for compressor cooling, and can still provide the cooling capacity required by the data center.

[0003] In the process of realizing this invention, the inventors discovered that the prior art has at least the following problems: the waste heat source often experiences temperature or flow fluctuations due to load changes or other reasons, causing the adsorption chiller to have unequal desorption and adsorption times, which has a significant impact on the cooling efficiency of the adsorption chiller. Therefore, there is a problem of low efficiency caused by the inability to efficiently synchronize desorption and adsorption due to fluctuations in the heat / cooling source. Summary of the Invention

[0004] In view of the above, the first objective of this invention is to provide a monitoring method for an adsorption refrigeration system, which can effectively solve the problem that the working efficiency of an adsorption refrigeration system is significantly affected by the temperature change of the heat source fluid. The second objective of this invention is to provide an adsorption refrigeration system using the above-mentioned monitoring method. The third objective of this invention is to provide a computer-readable storage medium for storing the above-mentioned monitoring method. The fourth objective of this invention is to provide a computer program product using the above-mentioned monitoring method.

[0005] To achieve the first objective mentioned above, the present invention provides the following technical solution:

[0006] A method for monitoring an adsorption refrigeration system includes the following steps:

[0007] The characteristic parameters of the adsorption bed in the desorption stage of the adsorption refrigeration system are obtained. The characteristic parameters can be characterized as the heat flux of the heat source fluid supplied to the adsorption bed in the desorption stage. The larger the characteristic parameters are, the greater the desorption efficiency of the adsorption bed in the desorption stage.

[0008] If the characteristic parameter exceeds the first preset parameter value, the cooling capacity of the adsorption cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system is increased to improve the adsorption efficiency of the adsorption bed in the adsorption stage; and / or, if the characteristic parameter is lower than the second preset parameter value, the cooling capacity of the adsorption cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system is reduced to decrease the adsorption efficiency of the adsorption bed in the adsorption stage.

[0009] In the aforementioned adsorption refrigeration system monitoring method, the heat source fluid supplied to the adsorption refrigeration system for desorption is not stable during application. This is because the heat source load and heating power of the supplied heat source fluid vary based on its own requirements. If the heat flux of the heat source fluid for desorption changes significantly, it will correspondingly lead to changes in the desorption efficiency of the adsorption bed. For example, if the desorption time of the adsorption bed decreases significantly, and the adsorption time remains unchanged, it will be necessary to wait for other adsorption beds to complete adsorption before exchange can occur, resulting in a decrease in overall efficiency. In the aforementioned adsorption refrigeration system monitoring method, by monitoring changes in the corresponding characteristic parameters of the reaction heat flux, the cooling capacity of the adsorption cooling fluid is adjusted accordingly to cause the adsorption time to change in the corresponding direction. For example, if the heat flux increases, the desorption efficiency increases, and the desorption time decreases. Therefore, the cooling capacity of the adsorption cooling fluid is increased accordingly to decrease the adsorption efficiency and shorten the adsorption time, thereby reducing the waiting time of the adsorption bed and better ensuring overall working efficiency; conversely, the opposite is also true. In summary, the above-mentioned monitoring method for adsorption refrigeration systems can effectively solve the problem that the working efficiency of adsorption refrigeration systems is significantly affected by changes in the temperature of the heat source fluid.

[0010] In some technical solutions, the characteristic parameter is the flow rate of the heat source fluid supplied to the adsorption bed in the desorption stage.

[0011] Some technical solutions also include:

[0012] Obtain the temperature of the heat source fluid supplied to the adsorption bed in the desorption stage;

[0013] When the temperature of the heat source fluid used for desorption exceeds the preset temperature range, the first output result is output.

[0014] In some technical solutions, the characteristic parameter is the temperature of the heat source fluid supplied to the adsorption bed in the desorption stage.

[0015] Some technical solutions also include:

[0016] Obtain the flow rate of the heat source fluid supplied to the adsorption bed in the desorption stage;

[0017] When the temperature of the heat source fluid used for desorption exceeds the preset flow rate range, a second output result is output.

[0018] In some technical solutions, the characteristic parameter is the adsorption chamber pressure of the adsorption bed during the desorption stage.

[0019] In some technical solutions, the characteristic parameters include the flow rate and temperature of the heat source fluid supplied to the adsorption bed in the desorption stage.

[0020] In some technical solutions, the cooling capacity of the cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system is increased, and / or the cooling capacity of the cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system is decreased; This is:

[0021] Based on the pre-stored data table, the corresponding cooling capacity parameters are obtained through the feature parameters. The pre-stored data table is a correspondence table between cooling capacity parameters and feature parameters.

[0022] The cooling capacity of the cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system is controlled to reach the corresponding cooling capacity parameter.

[0023] In some technical solutions, the cooling parameter is the temperature and / or flow rate of the cooling fluid used for adsorption.

[0024] In some technical solutions, controlling the cooling capacity of the adsorption cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system to reach the corresponding cooling capacity parameter includes:

[0025] The natural cooling device that provides cooling fluid for adsorption is controlled to be adjusted in at least one of the following ways: adjusting the pump speed, adjusting the fan speed, switching the spray and switching the wet film;

[0026] When the cooling capacity of the cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system reaches the corresponding cooling capacity parameter, the adjustment of the natural cooling device is stopped.

[0027] To achieve the second objective mentioned above, the present invention also provides an adsorption refrigeration system, comprising a control valve and multiple adsorption beds. Each adsorption bed has an adsorption chamber for an adsorbent and a heat exchange channel passing through the adsorption chamber and capable of exchanging heat with the adsorbent. The adsorption bed enters a desorption stage when a desorption heat exchange fluid is introduced into the heat exchange channel, and enters an adsorption stage when an adsorption cooling fluid is introduced into the heat exchange channel. The control valve is used to control the multiple adsorption beds to alternately enter the adsorption and desorption stages. The system also includes a controller capable of controlling the flow rate or temperature of the adsorption cooling fluid entering the adsorption bed in the adsorption stage. The controller is used to execute an acquired computer program to implement any of the above-mentioned adsorption refrigeration system monitoring methods. Since the above-mentioned adsorption refrigeration system monitoring method has the aforementioned technical effects, the adsorption refrigeration system having this monitoring method should also have corresponding technical effects.

[0028] To achieve the third objective mentioned above, the present invention also provides a computer-readable storage medium for storing a computer program that, when executed by a processor, implements any of the aforementioned adsorption refrigeration system monitoring methods. Since the aforementioned adsorption bed monitoring method has the aforementioned technical effects, the computer-readable storage medium applying this adsorption refrigeration system monitoring method should also have corresponding technical effects.

[0029] To achieve the fourth objective mentioned above, the present invention also provides a computer program product, comprising a computer program / instructions, which, when executed by a processor, implements any of the aforementioned adsorption refrigeration system monitoring methods. Since the aforementioned adsorption bed monitoring method possesses the aforementioned technical effects, the computer program product applying this adsorption refrigeration system monitoring method should also possess corresponding technical effects. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a flowchart illustrating the adsorption refrigeration system monitoring method provided in an embodiment of the present invention.

[0032] Figure 2 This is a schematic diagram of the adsorption refrigeration system provided in an embodiment of the present invention.

[0033] The following labels are shown in the attached diagram:

[0034] 1. Adsorption bed; 2. Heat source fluid for desorption; 3. Cooling fluid for adsorption; 4. Loading device; 5. Natural cooling device; 6. Condenser; 7. Evaporator; 8. Control valve; 11. Heat exchange channel. Detailed Implementation

[0035] This invention discloses a monitoring method for an adsorption refrigeration system, which effectively solves the problem that the working efficiency of the adsorption refrigeration system is significantly affected by the temperature change of the heat source fluid.

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Please see Figures 1-2 , Figure 1 This is a flowchart illustrating the adsorption refrigeration system monitoring method provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the adsorption refrigeration system provided in an embodiment of the present invention.

[0038] In some embodiments, an adsorption refrigeration system monitoring method is provided, specifically, the adsorption refrigeration system monitoring method includes the following steps:

[0039] Step 100: Obtain the characteristic parameters of the adsorption bed 1 in the desorption stage of the adsorption refrigeration system. The characteristic parameters can characterize the heat flux of the heat source fluid 2 supplied to the adsorption bed 1 in the desorption stage, and the larger the characteristic parameters are, the greater the desorption efficiency of the adsorption bed 1 in the desorption stage.

[0040] The adsorption refrigeration system mainly includes an adsorption bed 1, an evaporator 7, and a condenser 6. Generally, an adsorption refrigeration system includes multiple adsorption beds 1. During operation, some adsorption beds 1 will enter the adsorption stage, while others will enter the desorption stage, so that desorption and adsorption always exist in the adsorption refrigeration system to ensure the continuous utilization of the heat source fluid 2 for desorption and continuous cooling. Similarly, the cooling fluid 3 for adsorption needs to be continuously supplied. For example, an adsorption refrigeration system may consist of only two adsorption beds 1. The two adsorption beds 1 alternately enter the desorption stage and the adsorption stage. When the first adsorption bed 1 enters the desorption stage to consume the heat of the desorption heat source fluid 2, the second adsorption bed 1 needs to enter the adsorption stage for cooling. After running for a period of time, the first adsorption bed 1 completes desorption, and the supply of the desorption heat source fluid 2 is stopped. Instead, the adsorption cooling fluid 3 is supplied, and then the adsorption stage is entered for cooling. At the same time, the second adsorption bed 1 completes adsorption, and the supply of the adsorption cooling fluid 3 is stopped. The desorption heat source fluid 2 is then supplied, and then the desorption stage is entered to utilize the heat of the heat source fluid.

[0041] It should be noted that the connection relationships between the three main components in the adsorption refrigeration system can be found in existing technologies, such as heat wave circulation and mass return circulation. Furthermore, the condenser 6 and evaporator 7 can be combined into a single structure, such as a heat exchanger that alternates between condenser 6 and evaporator 7. The adsorption refrigeration system can also include more than three adsorption beds 1, divided into two parts, to allow for cross-entry of the adsorption and desorption stages.

[0042] For the low-grade driven adsorption bed 1, the temperature of the heat exchange fluid used for desorption is generally between 50°C and 65°C before it enters the adsorption bed 1. During normal desorption, the outlet temperature typically decreases by 3 to 5°C. Similarly, the temperature of the cooling fluid 3 used for adsorption is generally between 25°C and 35°C before it enters the adsorption bed 1. During normal adsorption, the outlet temperature typically increases by 2 to 5°C. Generally, the cooling fluid 3 used for adsorption and the heat exchange fluid used for desorption can use the same heat exchange channel 11, or different heat exchange channels 11 can be used, depending on the specific requirements.

[0043] The heat flux of the desorption heat source fluid 2 supplied to the adsorption bed 1 in the desorption stage can be obtained directly by reflecting the temperature and / or flow rate of the heat flux. Alternatively, it can be obtained indirectly by monitoring changes in other parameter characteristics caused by changes in the heat flux of the desorption heat source fluid 2 supplied to the adsorption bed 1 in the desorption stage. For example, when the heat flux of the desorption heat source fluid 2 supplied to the adsorption bed 1 in the desorption stage increases, the pressure of the corresponding adsorption bed 1 will increase.

[0044] Therefore, corresponding characteristic parameters can be selected according to actual needs. However, the characteristic parameters can characterize the heat flux of the heat source fluid 2 supplied to the adsorption bed 1 in the desorption stage. For ease of control, it is preferred that a larger characteristic parameter results in a higher desorption efficiency of the adsorption bed 1 in the desorption stage. It should be noted that the magnitude is relative; a larger characteristic parameter generally indicates a higher desorption efficiency of the adsorption bed 1 in the desorption stage, referring to the consistency between the changes in the characteristic parameter and the desorption efficiency of the adsorption bed 1 in the desorption stage.

[0045] Step 200: If the characteristic parameter exceeds the first preset parameter value, the cooling capacity of the adsorption cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system is increased to improve the adsorption efficiency of the adsorption bed 1 in the adsorption stage; and / or, if the characteristic parameter is lower than the second preset parameter value, the cooling capacity of the adsorption cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system is decreased to reduce the adsorption efficiency of the adsorption bed 1 in the adsorption stage.

[0046] Step 200 mainly includes a judgment step on the increase of desorption efficiency and a judgment step on the decrease of desorption efficiency. It may include only the judgment step on the increase of desorption efficiency, or only the judgment step on the decrease of desorption efficiency, or both the judgment steps on the increase of desorption efficiency and the judgment steps on the decrease of desorption efficiency.

[0047] The determination step for increased desorption efficiency involves the following steps: If the characteristic parameter exceeds a first preset parameter value, the cooling capacity of the adsorption cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system is increased to improve the adsorption efficiency of the adsorption bed 1. If the aforementioned characteristic parameter exceeds the first preset parameter value, it indicates that the heat flux is too large, resulting in a larger desorption efficiency and a shorter desorption time. In this case, it is necessary to increase the cooling capacity of the adsorption cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system to improve the adsorption efficiency and shorten the adsorption time. This reduces the fluctuation in the ratio of desorption time to adsorption time, thereby better ensuring the orderly progress of desorption and adsorption.

[0048] The determination step for reduced desorption efficiency involves the following steps: If the characteristic parameter is less than a second preset parameter value, the cooling capacity of the adsorption cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system is reduced to decrease the adsorption efficiency of the adsorption bed 1 in the adsorption stage. If the characteristic parameter is lower than the second preset parameter value, it indicates that the heat flux is too small, which will reduce the corresponding desorption efficiency and prolong the corresponding desorption time. In this case, it is necessary to reduce the cooling capacity of the adsorption cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system to reduce adsorption and prolong the adsorption time, thereby reducing the fluctuation in the ratio of desorption time to adsorption time and better ensuring that desorption and adsorption proceed in an orderly manner.

[0049] It should be noted that the variation in the cooling capacity of the cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system can correspond to the variation in the characteristic parameters of the adsorption bed 1 in the desorption stage of the adsorption refrigeration system. For example, it can be determined by the characteristic parameter C of the adsorption bed 1 in the desorption stage of the current adsorption refrigeration system. d With reference characteristic parameter C j Compare the values, such as obtaining the change range value (C). d -C j ) / C j Therefore, the corresponding change in the cooling capacity of the adsorption cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system can be (C) d -C j ) / C j If compared with the above-mentioned benchmark characteristic parameter C j The corresponding baseline cooling capacity of the adsorption cooling fluid 3 is L. j Therefore, the change in the cooling amount of the cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage needs to be L. j *(C d -C j ) / C j Therefore, the cooling capacity of the cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage can be L. j +L j *(C d -C j ) / C j As mentioned above, if the characteristic parameters of adsorption bed 1 in the desorption stage of the adsorption-refrigeration system are currently obtained as the reference characteristic parameter C... j Then, the cooling capacity of the cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system at this time is the reference cooling capacity L. j The baseline characteristic parameter C j And the baseline cooling capacity is L jGenerally, the design of the adsorption support cooling system's structure and materials is based on the actual conditions of the desorption heat source fluid 2 and the adsorption cooling fluid 3 at the site, selecting parameters that best suit the specific site conditions. For the desorption heat source fluid 2, higher temperatures are generally better. However, in practice, obtaining the temperature of the desorption heat source fluid 2 is constrained by site conditions. Therefore, a corresponding adsorption refrigeration system needs to be designed to adapt to the desorption heat source fluid 2 available at the site. Other parameters are also similarly limited by existing conditions.

[0050] In the aforementioned adsorption refrigeration system monitoring method, the heat source fluid 2 supplied to the adsorption refrigeration system for desorption is not stable during application. This is because the heat source load and heating power supplied to the heat source fluid 2 vary based on its own requirements. If the heat flux of the heat source fluid 2 for desorption changes significantly, it will correspondingly lead to a change in the desorption efficiency of the adsorption bed 1. For example, if the desorption time of the adsorption bed 1 becomes significantly shorter, and the adsorption time of the adsorption bed 1 does not change, then it is necessary to wait for other adsorption beds 1 to complete adsorption before exchange can occur, which will lead to a decrease in overall efficiency. In the aforementioned adsorption refrigeration system monitoring method, by monitoring the changes in the corresponding characteristic parameters of the reaction heat flux, the cooling capacity of the adsorption cooling fluid 3 is adjusted accordingly to make the adsorption time change in the corresponding direction. For example, if the heat flux increases, the desorption efficiency increases, and the desorption time decreases. Then, the cooling capacity of the adsorption cooling fluid 3 is increased accordingly to decrease the adsorption efficiency and shorten the adsorption time, thereby reducing the waiting time of the adsorption bed 1 and better ensuring the overall working efficiency; and vice versa. In summary, the above-mentioned monitoring method for adsorption refrigeration systems can effectively solve the problem that the working efficiency of adsorption refrigeration systems is significantly affected by changes in the temperature of the heat source fluid.

[0051] In some embodiments, considering that the heat source load may have its own monitoring system to prevent the temperature of the discharged heat source fluid from being too high, and if the temperature of the discharged heat source fluid is too high, the flow rate of the incoming fluid will be adjusted accordingly to ensure that the heat source load is effectively cooled so that the temperature of the discharged heat source fluid is relatively stable. In this case, only the flow rate of the discharged heat source fluid needs to be monitored, without monitoring the temperature, to obtain the heat flux of the desorption heat source fluid 2 supplied to the adsorption bed 1 in the desorption stage.

[0052] Based on this, the above characteristic parameters can be made to be the flow rate of the desorption heat source fluid 2 supplied to the adsorption bed 1 in the desorption stage.

[0053] Considering that monitoring flow rate alone to reflect heat flux in practical applications carries significant risks, it is also necessary to monitor the temperature of the heat source fluid 2 used for desorption. Specifically, this can include the following steps:

[0054] Obtain the temperature of the desorption heat source fluid 2 supplied to the adsorption bed 1 in the desorption stage;

[0055] When the temperature of the heat source fluid 2 used for desorption exceeds the preset temperature range, the first output result is output.

[0056] The first output result can be an alarm signal or a precondition for other operations, such as preventing the current monitoring method from continuing. Specifically, the preset temperature range mentioned above can be T. 1y With 1.01*T 1y Between, where T 1y Generally, the most suitable reference value is selected based on the actual operating conditions of the load device 4.

[0057] In some embodiments, considering that the heat source load typically operates at the maximum flow rate due to flow limitation, the flow rate of the discharged heat source fluid does not change, but the temperature does. In this case, it is not necessary to monitor the flow rate anymore; only the temperature change needs to be monitored to obtain the heat flux of the desorption heat source fluid 2 supplied to the adsorption bed 1 in the desorption stage.

[0058] Based on this, the characteristic parameter can be the temperature of the desorption heat source fluid 2 supplied to the adsorption bed 1 in the desorption stage.

[0059] Considering that monitoring temperature alone to reflect heat flux in practical applications carries significant risks, it is also necessary to monitor the flow rate of the heat source fluid 2 used for desorption. Specifically, this can include the following steps:

[0060] Obtain the flow rate of the desorption heat source fluid 2 supplied to the adsorption bed 1 in the desorption stage;

[0061] When the temperature of the heat source fluid 2 used for desorption exceeds the preset flow rate range, a second output result is output.

[0062] The second output result can be an alarm signal or a precondition for other operations, such as preventing the current monitoring method from continuing. Specifically, the aforementioned preset flow range can be Q. 1y With 1.01*Q 1y Between, where Q 1y Generally, the most suitable reference value is selected based on the actual operating conditions of the load device 4.

[0063] In some embodiments, considering that in practical applications, if the heat flux of the heat source fluid 2 for desorption increases, the amount of gaseous adsorbent desorbed will increase significantly, and the corresponding internal pressure will rise; conversely, the pressure will decrease. Therefore, the aforementioned characteristic parameter can still be the pressure of the adsorption chamber of the adsorption bed 1 during the desorption stage. Specifically, the characteristic parameter can be a comparison between the current pressure Pd and a preset pressure Py. Considering that the pressure in the adsorption chamber changes throughout the desorption stage, a comparison can be made between the pressure at the current time point and a preset change at the current time point. Generally, the desorption stage can be divided into three to five time points for comparison one by one.

[0064] In some embodiments, considering that the temperature and flow rate of the desorption heat source fluid 2 may change simultaneously, the characteristic parameters can include the flow rate and temperature of the desorption heat source fluid 2 supplied to the adsorption bed 1 in the desorption stage. Expressions for flow rate and temperature can be established to reflect changes in heat flux.

[0065] In some embodiments, the corresponding relationship between the magnitude of change in cooling capacity and the magnitude of change in heat flux is difficult to express accurately and is affected by many related factors.

[0066] Based on this, the cooling capacity of the adsorption cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system in step 20 can be increased and / or the cooling capacity of the adsorption cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system can be decreased, specifically:

[0067] Based on the pre-stored data table, the corresponding cooling capacity parameters are obtained through the feature parameters. The pre-stored data table is a correspondence table between cooling capacity parameters and feature parameters.

[0068] The cooling capacity of the adsorption cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system is controlled to reach the corresponding cooling capacity parameter. The cooling capacity parameter refers to the temperature and / or flow rate of the adsorption cooling fluid 3.

[0069] Taking flow rate as an example of a characteristic parameter, and flow rate as an example of a cooling parameter, a data table can be pre-established for the flow rates of the desorption heat source fluid 2 and the adsorption cooling fluid 3. A clear pattern in this data table is that as the flow rate of the desorption heat source fluid 2 increases, the corresponding flow rate of the cooling fluid also increases. In step 20, the corresponding flow rate of the adsorption cooling fluid 3 can be found by using the obtained flow rate of the desorption heat source fluid 2. In other words, the flow rate of the desorption heat source fluid 2 is compared and selected based on the increase or decrease in the flow rate of the adsorption cooling fluid 3.

[0070] Correspondingly, controlling the cooling capacity of the adsorption cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system to reach the corresponding cooling capacity parameter may specifically include the following steps:

[0071] The natural cooling device 4 that provides the cooling fluid 3 for adsorption is adjusted in at least one of the following ways: adjusting the pump speed, adjusting the fan speed, switching the spray and switching the wet film.

[0072] When the cooling fluid 3 supplied to the adsorption bed 1 in the adsorption stage of the adsorption refrigeration system reaches the corresponding cooling parameter, the adjustment of the natural cooling device 4 is stopped.

[0073] For example, in the case of the natural cooling device 4, a composite evaporative cooler is used. The temperature of the cooling fluid can be changed by reducing the airflow or stopping the spray. For details on how to adjust the cooling fluid temperature and / or flow rate at the outlet of the natural cooling device 4, refer to existing technologies. The adjustment method is generally PID control.

[0074] Based on the adsorption refrigeration system monitoring method provided in the above embodiments, the present invention also provides an adsorption refrigeration system, which includes a control valve 8 and multiple adsorption beds 1. Each adsorption bed 1 has an adsorption chamber for an adsorbent and a heat exchange channel 11 passing through the adsorption chamber and capable of exchanging heat with the adsorbent. The adsorption bed 1 enters a desorption stage when a desorption heat exchange fluid is introduced into the heat exchange channel 11, and enters an adsorption stage when an adsorption cooling fluid 3 is introduced into the heat exchange channel 11. The control valve 8 is used to control the multiple adsorption beds 1 to alternately enter the adsorption and desorption stages. The system also includes a controller, which can control the flow rate or temperature of the adsorption cooling fluid 3 entering the adsorption bed 1 in the adsorption stage. The controller is used to execute an acquired computer program to implement any one of the adsorption refrigeration system monitoring methods in the above embodiments. Since the adsorption bed 1 adopts the adsorption refrigeration system monitoring method in the above embodiments, the beneficial effects of the adsorption bed 1 are explained in the above embodiments.

[0075] The adsorption chamber of adsorption bed 1 is equipped with an adsorbent, and the working fluid used in conjunction with the adsorbent flows through the adsorption chamber and the condensation chamber of condenser 6, and also flows through evaporator 7. The working fluid and adsorbent combine to form a working fluid pair. In an adsorption refrigeration system, multiple working fluid pairs can be provided. One adsorbent can be paired with different working fluids, or multiple adsorbents can be paired with one working fluid. A typical adsorption refrigeration system includes the aforementioned adsorption bed 1, evaporator 7, and condenser 6.

[0076] For adsorption bed 1, there are two main working states: adsorption and desorption, which are generally carried out in stages. In the adsorption state, a low-temperature fluid, i.e., the adsorption cooling fluid 3, is used to cool the adsorption bed 1, allowing the adsorbent within the bed to adsorb the gaseous working medium, ensuring continuous adsorption capacity until the adsorbent reaches a preset saturation state. Taking physical adsorption as an example, the gaseous working medium liquefies into a liquid state, maintaining a low-pressure state within the adsorption chamber to continuously draw in gaseous working medium, such as continuously adsorbing the gaseous working medium from the evaporator 7, allowing the evaporator 7 to continuously absorb heat through evaporation. In the desorption state, a high-temperature fluid, i.e., the desorption heat exchange fluid, is generally used to heat the adsorption bed 1, causing the working medium to desorb from the adsorbent and re-form into a gaseous state. This gaseous working medium then enters the condenser 6, where it liquefies into a liquid state. The evaporator 7 and condenser 6 can be the same structure to alternately perform evaporation and condensation; or they can be two structures, as shown in the attached figure. When there are two adsorption beds 1, the two adsorption beds 1 alternately perform desorption and adsorption. At this time, the adsorption time and desorption time are approximately equal. In this case, two structures can be used as the evaporator 7 and condenser 6, respectively.

[0077] The adsorption bed 1 has a heat exchange channel 11 for heat exchange with the adsorbent in the adsorption chamber. This heat exchange channel 11 is a channel capable of carrying at least a high-temperature fluid (heat source fluid), so that a high-temperature fluid flows through it during the desorption phase of the adsorption bed 1. During the adsorption phase, the heat exchange channel 11 can be closed or used to carry a low-temperature fluid. The heat exchange channel 11 can exchange heat with the adsorbent, so that during the desorption phase, a high-temperature fluid flows through it, keeping the entire adsorption chamber at a high temperature. After absorbing heat, the adsorbent desorbs a gaseous adsorbent, which absorbs heat from the high-temperature fluid in the heat exchange channel 11. This gaseous adsorbent can be discharged to the outside or to the condensation chamber of the condenser 6, where it is condensed back into a gaseous adsorbent.

[0078] The control valve 8 is typically a three-way valve, used to alternately introduce the adsorption cooling fluid 3 and the desorption heat exchange fluid. Alternatively, multiple three-way valves can be installed to correspond to multiple adsorption beds 1, so that the adsorption cooling fluid 3 and the desorption heat exchange fluid are alternately introduced into each adsorption bed 1.

[0079] Based on the adsorption refrigeration system monitoring method provided in the above embodiments, the present invention also provides a computer-readable storage medium for storing a computer program, which, when executed by a processor, implements any one of the adsorption refrigeration system monitoring methods in the above embodiments. Since this computer-readable storage medium employs the adsorption refrigeration system monitoring method in the above embodiments, the beneficial effects of this computer-readable storage medium are explained in the above embodiments.

[0080] Based on the adsorption refrigeration system monitoring method provided in the above embodiments, the present invention also provides a computer program product, which includes a computer program / instructions. When executed by a processor, the computer program / instructions implement any one of the adsorption refrigeration system monitoring methods in the above embodiments. Since this computer program product employs the adsorption refrigeration system monitoring method in the above embodiments, the beneficial effects of this computer program product are explained in the above embodiments.

[0081] The various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0082] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A monitoring method for an adsorption refrigeration system, characterized in that, Includes the following steps: The characteristic parameters of the adsorption bed in the desorption stage of the adsorption refrigeration system are obtained. The characteristic parameters can be characterized as the heat flux of the heat source fluid supplied to the adsorption bed in the desorption stage. The larger the characteristic parameters are, the greater the desorption efficiency of the adsorption bed in the desorption stage. If the characteristic parameter exceeds the first preset parameter value, the cooling capacity of the adsorption cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system is increased to improve the adsorption efficiency of the adsorption bed in the adsorption stage; and / or, if the characteristic parameter is lower than the second preset parameter value, the cooling capacity of the adsorption cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system is reduced to decrease the adsorption efficiency of the adsorption bed in the adsorption stage.

2. The monitoring method for an adsorption refrigeration system according to claim 1, characterized in that, The characteristic parameter is the flow rate of the heat source fluid supplied to the adsorption bed in the desorption stage.

3. The monitoring method for an adsorption refrigeration system according to claim 2, characterized in that, Also includes: Obtain the temperature of the heat source fluid supplied to the adsorption bed in the desorption stage; When the temperature of the heat source fluid used for desorption exceeds the preset temperature range, the first output result is output.

4. The monitoring method for an adsorption refrigeration system according to claim 1, characterized in that, The characteristic parameter is the temperature of the heat source fluid supplied to the adsorption bed in the desorption stage.

5. The monitoring method for an adsorption refrigeration system according to claim 4, characterized in that, Also includes: Obtain the flow rate of the heat source fluid supplied to the adsorption bed in the desorption stage; When the temperature of the heat source fluid used for desorption exceeds the preset flow rate range, a second output result is output.

6. The monitoring method for an adsorption refrigeration system according to claim 1, characterized in that, The characteristic parameter is the adsorption chamber pressure of the adsorption bed during the desorption stage.

7. The monitoring method for an adsorption refrigeration system according to claim 1, characterized in that, The characteristic parameters include the flow rate and temperature of the heat source fluid supplied to the adsorption bed in the desorption stage.

8. The monitoring method for an adsorption refrigeration system according to any one of claims 1-7, characterized in that, The cooling capacity of the adsorption cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system is increased, and / or the cooling capacity of the adsorption cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system is decreased. for: Based on the pre-stored data table, the corresponding cooling capacity parameters are obtained through the feature parameters. The pre-stored data table is a correspondence table between cooling capacity parameters and feature parameters. The cooling capacity of the cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system is controlled to reach the corresponding cooling capacity parameter.

9. The monitoring method for an adsorption refrigeration system according to claim 8, characterized in that, The cooling parameters are the temperature and / or flow rate of the cooling fluid used for adsorption.

10. The monitoring method for an adsorption refrigeration system according to claim 9, characterized in that, Controlling the cooling capacity of the adsorption cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system to achieve the corresponding cooling capacity parameter includes: The natural cooling device that provides cooling fluid for adsorption is controlled to be adjusted in at least one of the following ways: adjusting the pump speed, adjusting the fan speed, switching the spray and switching the wet film; When the cooling capacity of the cooling fluid supplied to the adsorption bed in the adsorption stage of the adsorption refrigeration system reaches the corresponding cooling capacity parameter, the adjustment of the natural cooling device is stopped.

11. An adsorption refrigeration system, comprising a control valve and a plurality of adsorption beds, each adsorption bed having an adsorption chamber for an adsorbent and a heat exchange channel passing through the adsorption chamber and capable of exchanging heat with the adsorbent, wherein the adsorption bed enters a desorption stage when a desorption heat exchange fluid is introduced into the heat exchange channel, and enters an adsorption stage when a cooling fluid for adsorption is introduced into the heat exchange channel, the control valve being used to control the plurality of adsorption beds to alternately enter the adsorption stage and the desorption stage; characterized in that, It also includes a controller capable of controlling the flow rate or temperature of the cooling fluid entering the adsorption bed in the adsorption stage, the controller being used to execute an acquired computer program to implement the adsorption refrigeration system monitoring method as described in any one of claims 1 to 10.

12. A computer-readable storage medium, characterized in that, Used to store a computer program, which, when executed by a processor, implements the adsorption refrigeration system monitoring method as described in any one of claims 1 to 10.

13. A computer program product comprising a computer program / instructions, characterized in that, When the computer program / instructions are executed by the processor, they implement the adsorption refrigeration system monitoring method according to any one of claims 1 to 10.

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