Internal combustion power pack ambient temperature regulation device and its control method and test method

Abstract

An internal combustion engine power pack ambient temperature regulation device and its control and testing methods are disclosed, comprising a test chamber, an internal combustion engine power pack, a load, a first heat exchange device, a second heat exchange device, a first water tank, a second water tank, a first water pump, and a second water pump. The inlet of the first heat exchange device is connected to the first water tank via the second water pump, and its outlet is connected to the second water tank. The inlet of the second heat exchange device is connected to the second water tank via the first water pump, and its outlet is connected to the first water tank. The first water pump is configured to pump cooling water from the second water tank towards the second heat exchange device. The second water pump is configured to pump high-temperature water from the first water tank towards the first heat exchange device. Compared with existing technologies, this invention, while cooling the load, utilizes the heat energy dissipated by the load to increase the ambient temperature within the test chamber, thereby avoiding energy waste caused by the loss of a large amount of energy as heat.

Description

Technical Field

[0001] This invention relates to the field of rail transit equipment, specifically to an internal combustion power pack ambient temperature regulation device and its control and testing methods. Background Technology

[0002] Currently, in the rail transit sector, to simplify the external interfaces of internal combustion engines, improve system integration, and shorten the production cycle of locomotives and rolling stock, an increasing number of internal combustion engines are being integrated into their supporting systems in the form of power packs, known as internal combustion power packs. Internal combustion power packs are characterized by high integration and the ability to independently output energy. Before leaving the factory, power packs must undergo routine and type tests, such as power pack temperature rise tests, performance tests, and temperature field tests.

[0003] Currently, during internal combustion power pack testing, an external resistive load is used to consume the electrical energy output by the power pack, and then the heat of the resistive load is carried away by cooling water to cool it down. This results in a large amount of energy being lost in the form of heat, causing energy waste. Summary of the Invention

[0004] This application provides an internal combustion power pack ambient temperature regulation device and its control and testing methods to solve the problem of energy waste caused by the loss of a large amount of energy in the form of heat during existing internal combustion power pack tests.

[0005] To achieve the above objectives, this application adopts the following technical solution.

[0006] On one hand, an environmental temperature regulation device for an internal combustion engine power pack is provided, comprising a test chamber, an internal combustion engine power pack, and a load; the internal combustion engine power pack is located inside the test chamber, and the load is electrically connected to the internal combustion engine power pack; characterized in that it further comprises a first heat exchange device, a second heat exchange device, a first water tank, a second water tank, a first water pump, and a second water pump; the first heat exchange device is located inside the test chamber, with its inlet end connected to the first water tank and its outlet end connected to the second water tank; the load is located outside the test chamber, and the second heat exchange device is located near the load, with its inlet end connected to the second water tank and its outlet end connected to the first water tank; the first water pump is located between the second water tank and the second heat exchange device, configured to pump cooling water from the second water tank toward the second heat exchange device; the second water pump is located between the first water tank and the first heat exchange device, configured to pump high-temperature water from the first water tank toward the first heat exchange device.

[0007] The above solution achieves load cooling while utilizing the heat dissipated by the load to increase the ambient temperature inside the test plant, thereby avoiding energy waste caused by the loss of a large amount of energy in the form of heat.

[0008] In some embodiments, the system further includes a control unit, a first temperature sensor, a second temperature sensor, and a third temperature sensor; the first temperature sensor is located in the first water tank, the second temperature sensor is located in the second water tank, and the third temperature sensor is located in the test building; the control unit is communicatively connected to the internal combustion power pack, the first water pump, the second water pump, the first temperature sensor, the second temperature sensor, and the third temperature sensor, respectively.

[0009] On another front, a control method for the aforementioned internal combustion power pack ambient temperature regulation device is provided, comprising the step of configuring the power of the first water pump to P3, wherein P3 is obtained by the following method:

[0010] The output power of the internal combustion power pack is calculated using the following formula. ;in, The power of the internal combustion power pack. The operating time of the internal combustion power pack;

[0011] Calculate the load power using the following formula. and the heat load ;in, For load conversion efficiency;

[0012] The mass of cooling water that the first water pump should deliver is calculated using the following formula. ;in, The specific heat capacity of cooling water, This represents the temperature difference between the first and second water tanks. , The temperature of the first water tank. The temperature of the second water tank;

[0013] The volumetric flow rate of the first water pump is calculated using the following formula. ;in The density of the cooling water;

[0014] The volumetric flow rate of the first water pump can be found in the power-flow curve of the first water pump. The corresponding power value is .

[0015] The above solution adaptively adjusts the power of the first water pump according to the power of the internal combustion power pack, which not only ensures the cooling effect of the load, but also avoids the continuous high-power operation of the first water pump, thereby avoiding energy waste.

[0016] In some embodiments, when the power of the internal combustion power pack When changes occur, recalculate the new P3 and configure the power of the first water pump to the new value. .

[0017] On the other hand, a test method for an internal combustion power pack is provided, wherein the aforementioned internal combustion power pack ambient temperature control device is used to conduct a room temperature test on the internal combustion power pack.

[0018] During the room temperature test, the power of the first water pump was configured as follows: ,in Obtain it through the following method:

[0019] The output power of the internal combustion power pack is calculated using the following formula. ;in, The power of the internal combustion power pack. The operating time of the internal combustion power pack;

[0020] Calculate the load power using the following formula. and the heat load ;in, For load conversion efficiency;

[0021] The mass of cooling water that the first water pump should deliver is calculated using the following formula. ;in, The specific heat capacity of cooling water, This represents the temperature difference between the first and second water tanks. , The temperature of the first water tank. The temperature of the second water tank;

[0022] The volumetric flow rate of the first water pump is calculated using the following formula. ;in The density of the cooling water;

[0023] The volumetric flow rate of the first water pump can be found in the power-flow curve of the first water pump. The corresponding power value is .

[0024] The above solution adaptively adjusts the power of the first water pump according to the power of the internal combustion power pack, which not only ensures the cooling effect of the load, but also avoids the continuous high-power operation of the first water pump, thereby avoiding energy waste.

[0025] In some embodiments, after the ambient temperature test is completed and At that time, a high-temperature test was conducted on the internal combustion power pack; among which The target environmental temperature for high-temperature testing. The preset temperature difference value has a range of values. ;

[0026] At the start of the high-temperature test, the power of the water pump is the same as the final power of the water pump in the normal-temperature test.

[0027] During the high-temperature test,

[0028] when At that time, increase the power of the second water pump;

[0029] when At that time, reduce the power of the second water pump;

[0030] when At this time, the power of the second water pump is maintained at the current power;

[0031] in The ambient temperature of the test plant. , To preset the temperature difference value, .

[0032] The above solution adjusts the power of the second water pump according to the difference between the ambient temperature of the test plant and the target ambient temperature of the high-temperature test, which ensures the cooling effect of the load and avoids the continuous high-power operation of the second water pump, thereby avoiding energy waste.

[0033] In some embodiments, during ambient temperature and high temperature tests, when the power of the internal combustion power pack... When changes occur, recalculate the new... And configure the power of the first water pump to a new value. .

[0034] This application has at least the following technical effects or advantages:

[0035] 1. While cooling the load, the heat energy dissipated by the load is used to increase the ambient temperature inside the test plant, thereby avoiding energy waste caused by the loss of a large amount of energy in the form of heat.

[0036] 2. By adaptively adjusting the power of the first water pump according to the power of the internal combustion power pack, the cooling effect of the load is ensured, while avoiding continuous high-power operation of the first water pump, thus avoiding energy waste.

[0037] 3. By adjusting the power of the second water pump according to the difference between the ambient temperature of the test plant and the target ambient temperature of the high-temperature test, the cooling effect of the load is ensured, while avoiding continuous high-power operation of the second water pump, thus avoiding energy waste. Attached Figure Description

[0038] Figure 1 This is a schematic diagram of the structure of the internal combustion power pack ambient temperature regulation device in one embodiment of this application;

[0039] Figure 2 This is a power-flow rate curve of the first water pump in one embodiment of this application. Detailed Implementation

[0040] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0041] Example 1

[0042] See Figure 1 In the diagram, the lines with arrows represent cooling water pipes, and the remaining lines represent electrical connection lines.

[0043] An ambient temperature regulation device for an internal combustion power pack includes a test chamber 1, an internal combustion power pack 2, a load 3, a first heat exchanger 41, a second heat exchanger 42, a first water tank 51, a second water tank 52, a first water pump 61, a second water pump 62, and a control unit 8. A first temperature sensor 71 is installed in the first water tank 51, a second temperature sensor 72 is installed in the second water tank 52, and a third temperature sensor 73 is installed in the test chamber 1.

[0044] The internal combustion power pack 2 is located in the test plant 1, and the load 3 is electrically connected to the internal combustion power pack 2.

[0045] The first heat exchange device 41 is located in the test plant 1. The inlet end of the first heat exchange device 41 is connected to the first water tank 51, and the outlet end is connected to the second water tank 52.

[0046] Load 3 is located outside the test plant 1. The second heat exchange device 42 is located near load 3. The inlet of the second heat exchange device 42 is connected to the second water tank 52, and the outlet is connected to the first water tank 51.

[0047] The first water pump 61 is located between the second water tank 52 and the second heat exchange device 42, and is configured to pump the cooling water in the second water tank 52 toward the second heat exchange device 42.

[0048] The second water pump 62 is located between the first water tank 51 and the first heat exchange device 41, and is configured to pump the high-temperature water in the first water tank 51 toward the first heat exchange device 41.

[0049] The control unit 8 is communicatively connected to the internal combustion power pack 2, the first water pump 61, the second water pump 62, the first temperature sensor 71, the second temperature sensor 72, and the third temperature sensor 73.

[0050] To improve the heat exchange efficiency of the first heat exchange device 41, a cooling fan 411 and a drive motor 412 for driving the cooling fan 411 can be installed near the first heat exchange device 41. The drive motor 412 is communicatively connected to the control unit 8, which controls the start, stop, and speed of the drive motor 412. Of course, the second heat exchange device 42 can also adopt the same structure.

[0051] Example 2

[0052] A control method for the aforementioned internal combustion power pack ambient temperature regulating device includes the step of configuring the power of a first water pump to P3, wherein P3 is obtained by the following method:

[0053] The output power of the internal combustion power pack is calculated using the following formula. ;in, The power of the internal combustion power pack. The operating time of the internal combustion power pack;

[0054] Calculate the load power using the following formula. and the heat load ;in, For load conversion efficiency;

[0055] The mass of cooling water that the first water pump should deliver is calculated using the following formula. ;in, The specific heat capacity of cooling water, This represents the temperature difference between the first and second water tanks. , The temperature of the first water tank (i.e., the value detected by the first temperature sensor 71). The temperature of the second water tank (i.e., the value detected by the second temperature sensor 71).

[0056] The volumetric flow rate of the first water pump is calculated using the following formula. ;in The density of the cooling water;

[0057] The power-flow curve of the first water pump (e.g.) Figure 2 As shown in the PQ curve, the volumetric flow rate of the first water pump can be found. The corresponding power value is Specifically, the volumetric flow rate of the first water pump is calculated using the above formula. The value is ,pass Figure 2 It can be found that... The corresponding power value is That is, the value of P3. Control unit 8 controls the first water pump 61 to... Power operation ensures stable cooling water flow, guaranteeing the cooling effect of the load while avoiding continuous high-power operation of the first water pump, thus preventing energy waste.

[0058] When the power of the internal combustion power pack When changes occur, the new P3 needs to be calculated and the power of the first water pump needs to be configured accordingly. .

[0059] Example 3

[0060] A test method for an internal combustion power pack, wherein the method uses the aforementioned internal combustion power pack ambient temperature control device to conduct a room temperature test on the internal combustion power pack;

[0061] During the room temperature test, the power of the first water pump was configured as follows: ,in Obtain it through the following method:

[0062] The output power of the internal combustion power pack is calculated using the following formula. ;in, The power of the internal combustion power pack. The operating time of the internal combustion power pack;

[0063] Calculate the load power using the following formula. and the heat load ;in, For load conversion efficiency;

[0064] The mass of cooling water that the first water pump should deliver is calculated using the following formula. ;in, The specific heat capacity of cooling water, This represents the temperature difference between the first and second water tanks. , The temperature of the first water tank (i.e., the value detected by the first temperature sensor 71). The temperature of the second water tank (i.e., the value detected by the second temperature sensor 71).

[0065] The volumetric flow rate of the first water pump is calculated using the following formula. ;in The density of the cooling water;

[0066] The volumetric flow rate of the first water pump can be found in the power-flow curve of the first water pump. The corresponding power value is ;

[0067] After the room temperature test was completed and At that time, a high-temperature test was conducted on the internal combustion power pack; among which The target ambient temperature for the high-temperature test (set before the high-temperature test begins). The preset temperature difference value has a range of values. Preferred Under normal circumstances, the heat generated by the ambient temperature test load is sufficient to raise the temperature of the first water tank to [a certain level]. (i.e., the target ambient temperature for the high-temperature test +) If the requirements cannot be met, the water in the first pool can be heated by other means, and the high-temperature test can be carried out after the water temperature reaches the required level.

[0068] At the start of the high-temperature test, the power of the water pump is the same as the final power of the water pump in the normal-temperature test.

[0069] During the high-temperature test,

[0070] when At that time, increase the power of the second water pump;

[0071] when At that time, reduce the power of the second water pump;

[0072] when At that time, maintain the power of the second water pump at the current power;

[0073] in The ambient temperature of the test plant (i.e., the value detected by the third temperature sensor 73). , To preset the temperature difference value, . , The value can be set according to the situation, for example, it can be set to... Set as , Set as .

[0074] During both normal temperature and high temperature tests, when the power of the internal combustion power pack... When changes occur, recalculate the new... And configure the power of the first water pump to the new .

[0075] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An environmental temperature regulation device for an internal combustion engine power pack, comprising a test chamber, an internal combustion engine power pack, and a load; wherein the internal combustion engine power pack is disposed in the test chamber, and the load is electrically connected to the internal combustion engine power pack; characterized in that: It also includes a first heat exchanger, a second heat exchanger, a first water tank, a second water tank, a first water pump, and a second water pump; the first heat exchanger is located inside the test plant, with its inlet connected to the first water tank and its outlet connected to the second water tank; the load is located outside the test plant, and the second heat exchanger is located near the load, with its inlet connected to the second water tank and its outlet connected to the first water tank; the first water pump is located between the second water tank and the second heat exchanger, and is configured to pump cooling water from the second water tank toward the second heat exchanger; the second water pump is located between the first water tank and the first heat exchanger, and is configured to pump high-temperature water from the first water tank toward the first heat exchanger. The power of the first water pump is configured as follows: , The calculation methods include: The output power of the internal combustion power pack is calculated using the following formula. ;in, The power of the internal combustion power pack. The operating time of the internal combustion power pack; Calculate the load power using the following formula. and the heat load ;in, For load conversion efficiency; The mass of cooling water that the first water pump should deliver is calculated using the following formula. ;in, The specific heat capacity of cooling water, This represents the temperature difference between the first and second water tanks. , The temperature of the first water tank. The temperature of the second water tank; The volumetric flow rate of the first water pump is calculated using the following formula. ;in The density of the cooling water; The volumetric flow rate of the first water pump can be found in the power-flow curve of the first water pump. The corresponding power value is .

2. The internal combustion power pack ambient temperature regulating device according to claim 1, characterized in that: It also includes a control unit, a first temperature sensor, a second temperature sensor, and a third temperature sensor; the first temperature sensor is located in the first water tank, the second temperature sensor is located in the second water tank, and the third temperature sensor is located in the test plant; the control unit is communicatively connected to the internal combustion power pack, the first water pump, the second water pump, the first temperature sensor, the second temperature sensor, and the third temperature sensor, respectively.

3. The internal combustion power pack ambient temperature regulating device according to claim 1 or 2, characterized in that: When the power of the internal combustion power pack When changes occur, recalculate the new P3 and configure the power of the first water pump to the new value. .

4. A test method for an internal combustion power pack, characterized in that: The method uses the ambient temperature regulation device for the internal combustion power pack as described in any one of claims 1-3 to conduct a room temperature test on the internal combustion power pack.

5. The test method for internal combustion power packs according to claim 4, characterized in that: After the room temperature test was completed and At that time, a high-temperature test was conducted on the internal combustion power pack; among which The target environmental temperature for high-temperature testing. The preset temperature difference value has a range of values. ; At the start of the high-temperature test, the power of the water pump is the same as the final power of the water pump in the normal-temperature test. During the high-temperature test, when At that time, increase the power of the second water pump; when At that time, reduce the power of the second water pump; when At this time, the power of the second water pump is maintained at the current power; in The ambient temperature of the test plant. , To preset the temperature difference value, .

6. The test method for internal combustion power packs according to claim 5, characterized in that: During both normal temperature and high temperature tests, when the power of the internal combustion power pack... When changes occur, recalculate the new... And configure the power of the first water pump to a new value. .

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