Method for testing thermal resistance characteristics and water-saving performance of condensing module

Abstract

The application provides a condensing module thermal resistance characteristic and water-saving performance test method, which comprises the following steps: building a test device, collecting corresponding parameters through the test device, processing the corresponding parameters, calculating a condensing module heat exchange coefficient, calculating a condensing module resistance coefficient, and evaluating the water-saving performance of the condensing module. The application can evaluate the water-saving effect of different condensing modules and provide a reference basis for optimizing or selecting a condensing module.

Description

Technical Field

[0001] This invention relates to the field of condenser module performance testing technology, specifically a method for testing the thermal resistance characteristics and water-saving performance of condenser modules. Background Technology

[0002] In modern industrial production and daily life, a large amount of waste heat needs to be discharged, which is generally done using cooling towers. When using a wet cooling tower for heat discharge, the circulating cooling water absorbs the heat carried by the waste heat and enters the cooling tower. The water distribution system sprays the water onto the packing material to increase the heat exchange area. The ambient air enters from the bottom of the cooling tower and flows upward, exchanging heat with the circulating water in the packing material. After the circulating water temperature decreases, it exchanges heat with the heat source again, while the hot air is discharged into the atmosphere from the top of the cooling tower.

[0003] In wet cooling towers, the circulating water and air exchange heat primarily through evaporation. Therefore, the hot air at the cooling tower outlet is nearly saturated, and a large amount of circulating water is carried out and diffused into the atmosphere, potentially causing white fog at the outlet and polluting the environment. This also increases water consumption for production or daily life. Therefore, condensation modules are used in cooling towers. These modules exchange heat with the saturated hot air at the outlet, lowering the temperature of the hot air and causing some of the circulating water to condense and be recycled. Simultaneously, the two types of air mix at the outlet, achieving water conservation and fog reduction.

[0004] Currently, water-saving and defogging towers are used in industrial production, and their water-saving effect mainly depends on the performance of the condensing module. While there are many types of condensing modules, research on testing methods for their thermal resistance characteristics and water-saving performance is limited, hindering the design optimization and practical application selection of condensing modules. Summary of the Invention

[0005] To address the aforementioned shortcomings of existing technologies, this invention proposes a method for testing the thermal resistance characteristics and water-saving performance of a condensing module. The method provided by this invention includes the following steps:

[0006] S1. Construction of the testing device: The testing device includes a test tower, inside which is a condensation module. Below the condensation module is a condensate collection tank, below which is a water collector, below which is a water distribution system, and below which is packing material. The top of the test tower is connected to a main fan, which has a hot air outlet. One side of the test tower located on the condensation module is connected to a cold air fan via a first ventilation duct, which contains a first heater. The other side of the test tower located on the condensation module is connected to a cold air outlet. One bottom side of the test tower is connected to an air inlet via a second ventilation duct. The bottom of the test tower has a water collection tank, which is connected to a water storage tank via an outlet pipe. The water storage tank contains a submersible pump, which is connected to the water distribution system via a circulating water pipe, which contains a second heater.

[0007] The system includes a first vortex flow meter on the first ventilation duct, a second vortex flow meter on the second ventilation duct, and an electromagnetic flow meter on the circulating water duct. The first ventilation duct contains cold air pressure and wet / dry bulb temperature measuring points, and the cold air outlet contains cold air pressure and dry bulb temperature measuring points. The test tower contains hot air pressure and wet / dry bulb temperature measuring points located between the condensate collection tank and the water collector, and above the condensation module. The second ventilation duct contains inlet air wet / dry bulb temperature measuring points. The main fan, air cooler, and submersible pump are all regulated by frequency converters.

[0008] S2. Collect relevant parameters using the testing device, including: inlet air pressure p. a Inlet air dry bulb temperature t d1 Inlet air wet-bulb temperature t w1 Inlet airflow V ha Circulating water flow rate V w 1. Hot air dry bulb temperature t in front of the condenser module hd1 1. Wet-bulb temperature of hot air in front of the condenser module (t) hw1 Hot air pressure p before the condenser module h1 1. Hot air dry bulb temperature t after condenser module hd2 1. Hot air pressure p after condenser module h2 1. Dry bulb temperature of cold air in front of the condenser module (t) cd1 1. Wet-bulb temperature of cold air in front of the condenser module (t) cw1 Cold air pressure p in front of the condenser module c1 1. Dry bulb temperature of cold air after condenser module (t) cd2 The cold air pressure p after the condenser module c2 Cold air flow rate V caCondensate volume (m) cw ;

[0009] S3. Process the corresponding parameters:

[0010] 1) The wet-bulb temperature of the hot air before the condenser module corresponds to the saturated vapor pressure (where is the absolute temperature):

[0011]

[0012] 2) The saturated vapor pressure corresponding to the dry-bulb temperature of the hot air before the condenser module (where is the absolute temperature):

[0013]

[0014] 3) Relative humidity of the hot air in front of the condenser module:

[0015] φ h1 =(p″ v,hw1 -0.000662*p h1 *(t hd1 -t hw1 )) / p″ v,hd1

[0016] 4) Moisture content of hot air before the condenser module:

[0017] x h1 =0.622*φ h1 *p″ v,hd1 / (p h1 -φ h1 *p″ v,hd1 )

[0018] 5) Enthalpy of hot air before the condenser module:

[0019]

[0020] 6) Density of hot, moist air in front of the condenser module (where is the absolute temperature):

[0021] ρ hw1 =0.003483*p h1 / T hd1 -0.001316*φ h1 *p″ v,hd1 / T hd1

[0022] 7) Density of hot, dry air in front of the condenser module:

[0023]

[0024] 8) The dry-bulb temperature of the hot air after the condenser module corresponds to the saturated vapor pressure (the air is saturated, the dry-bulb temperature is equal to the wet-bulb temperature, where is the absolute temperature):

[0025]

[0026] 9) Moisture content of hot air after condensation module:

[0027] x h2 =0.622*p″ v,hd2 / (p h2 -p″ v,hd2 )

[0028] 10) Enthalpy of hot air after condenser module:

[0029]

[0030] 11) Density of humidified hot air after the condenser module (where is the absolute temperature):

[0031] ρ hw2 =0.003483*p h2 / T hd2 -0.001316*p″ v,hd2 / T hd2

[0032] 12) The wet-bulb temperature of the cold air before the condenser module corresponds to the saturated vapor pressure (where is the absolute temperature):

[0033]

[0034] 13) The dry-bulb temperature of the cold air before the condenser module corresponds to the saturated vapor pressure:

[0035]

[0036] 14) Calculate the relative humidity of the cold air in front of the condenser module:

[0037] φ c1 =(p″ v,cw1 -0.000662*p c1 *(t cd1 -t cw1 )) / p″ v,cd1

[0038] 15) Moisture content of the cold air in front of the condenser module:

[0039] x c1 =0.622*φ c1 *p″ v,cd1 / (p c1 -φ c1 *p″ v,cd1 )

[0040] 16) Enthalpy of cold air in front of the condenser module:

[0041]

[0042] 17) Density of moist air in front of the condenser module (where is the absolute temperature):

[0043] ρ cw1 =0.003483*p c1 / T cd1 -0.001316*φ c1 *p″ v,cd1 / T cd1

[0044] 18) Density of dry air in front of the condenser module:

[0045]

[0046] 19) The dry-bulb temperature of the cold air after the condenser module corresponds to the saturated vapor pressure:

[0047]

[0048] 20) Enthalpy of cold air after condensation module (moisture content remains unchanged):

[0049]

[0050] 21) Density of humidified cold air after the condenser module (where is the absolute temperature):

[0051] ρ cw2 =0.003483*p c2 / T cd2 -0.001316*p″ v,cd2 / T cd2 S4. Calculation of heat transfer coefficient of condensing module:

[0052] The logarithmic mean temperature difference between the hot and cold air in the condenser module is:

[0053]

[0054] The heat transfer coefficient of the condenser module is:

[0055]

[0056] In the formula, A is the total heat exchange area of ​​the condensing module;

[0057] S5. Calculation of resistance coefficient of condensing module:

[0058] The drag coefficient on the hot air side is:

[0059]

[0060] In the formula S h This refers to the cross-sectional area of ​​the hot air side condenser module;

[0061] The drag coefficient on the cold air side is:

[0062]

[0063] In the formula S c This refers to the cross-sectional area of ​​the condenser module on the cold air side;

[0064] S6. Water-saving performance evaluation of the condenser module:

[0065] Under different test conditions (test parameters include the hot air dry and wet bulb temperatures and flow rate in front of the condenser module, and the cold air dry and wet bulb temperatures and flow rate in front of the condenser module), two methods for calculating the water saving of the condenser module are included:

[0066] 1) Calculate water savings based on condensate flow:

[0067]

[0068] In the formula, t refers to the duration of condensate collection;

[0069] 2) Calculate water savings by observing changes in the state of hot air:

[0070] Δm cw =V ha *ρ hd *(x h1 -x h2 ).

[0071] Preferably, in the thermal balance calculation of the condensing module, the absolute value of the thermal balance error Δε at the effective operating point is no greater than 7%.

[0072]

[0073] Compared with the prior art, the beneficial effects of the present invention are as follows: the water-saving performance testing method of the condensing module provided by the present invention can evaluate the water-saving effect of different condensing modules and provide a reference for the optimization or selection of condensing modules. Attached Figure Description

[0074] Figure 1 This is a schematic diagram of the test device in an embodiment of the present invention.

[0075] The components are as follows: 1. Air inlet; 2. Second ventilation duct; 3. Second vortex flow meter; 4. Inlet air dry and wet bulb temperature measuring points; 5. Packing material; 6. Water collection tank; 7. Water outlet pipe; 8. Water storage tank; 9. Submersible pump; 10. Circulating water pipe; 11. Second heater; 12. Electromagnetic flow meter; 13. Water distribution system; 14. Water collector; 15. Hot air pressure and dry and wet bulb temperature measuring points before the condenser module; 16. Condensate collection tank; 17. Air cooler; 18. First heater; 19. First vortex flow meter; 20. Cold air pressure and dry and wet bulb temperature measuring points before the condenser module; 21. Condenser module; 22. Cold air pressure and dry bulb temperature measuring points after the condenser module; 23. Cold air outlet; 24. Hot air pressure and dry bulb temperature measuring points after the condenser module; 25. Main fan; 26. Hot air outlet. Detailed Implementation

[0076] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below with reference to specific illustrations.

[0077] Example

[0078] A method for testing the thermal resistance characteristics and water-saving performance of a condensing module includes the following steps:

[0079] S1. Set up the test setup: such as... Figure 1 As shown, the testing device includes a test tower, inside which is a condensation module 21. Below the condensation module 21 is a condensate collection tank 16, which includes several water tank units detachably connected to the condensation module 21 for collecting and draining condensate to facilitate measurement of the amount of condensate generated over a certain period of time. Below the condensate collection tank 16 is a water collector 14, below which is a water distribution system 13, and below the water distribution system 13 is packing material 5. The top of the test tower is connected to a main fan 25, which has a hot air outlet 26. The test tower is connected to the air cooler 17 on one side of the condensing module 21 via a first ventilation duct. A first heater 18 is installed inside the first ventilation duct. The test tower is connected to the cold air outlet 23 on the other side of the condensing module 21. The bottom of one side of the test tower is connected to the air inlet 1 via a second ventilation duct 2. A water collection tank 6 is provided at the bottom of the test tower. The water collection tank 6 is connected to the water storage tank 8 via a water outlet pipe 7. A submersible pump 9 is provided inside the water storage tank 8. The submersible pump 9 is connected to the water distribution system 13 via a circulating water pipe 10. A second heater 11 is provided on the circulating water pipe 10.

[0080] The first ventilation duct is equipped with a first vortex flow meter 19 to collect cold air flow; the second ventilation duct 2 is equipped with a second vortex flow meter to collect inlet air flow; the circulating water pipe 10 is equipped with an electromagnetic flow meter to collect circulating water flow; the first ventilation duct is equipped with a cold air pressure and dry-bulb / wet-bulb temperature measuring point 20 before the condenser module, and the cold air outlet 23 is equipped with a cold air pressure and dry-bulb / wet-bulb temperature measuring point 22 after the condenser module; the test tower is equipped with a hot air pressure and dry-bulb / wet-bulb / wet-bulb temperature measuring point 15 between the condensate collection tank 16 and the water collector 14, and the test tower is equipped with a hot air pressure and dry-bulb / wet ... Above module 21, there is a measuring point 24 for hot air pressure and dry bulb temperature after the condenser module; inside the second ventilation duct 2, there is a measuring point 4 for inlet air dry and wet bulb temperature; the main fan 25, the air cooler 17, and the submersible pump 9 are all regulated by frequency converters to create different test conditions. For example, by using a frequency converter to control the circulating water volume and using the second heater 11 to heat the circulating water, the dry and wet bulb temperatures of the hot air in front of the condenser module 21 can be adjusted; by using a frequency converter to control the cold air temperature and using the first heater 18 to heat the cold air in front of the condenser module 21, the dry and wet bulb temperatures of the cold air in front of the condenser module 21 can be adjusted.

[0081] S2. Collect relevant parameters using the testing device, including: inlet air pressure p. a Inlet air dry bulb temperature t d1 Inlet air wet-bulb temperature t w1 Inlet airflow V ha Circulating water flow rate V w 1. Hot air dry bulb temperature t in front of the condenser module hd1 1. Wet-bulb temperature of hot air in front of the condenser module (t) hw1 Hot air pressure p before the condenser module h1 1. Dry bulb temperature of hot air after condenser module t hd2 1. Hot air pressure p after condenser module h2 1. Dry bulb temperature of cold air in front of the condenser module (t) cd1 1. Wet-bulb temperature of cold air in front of the condenser module (t) cw1 Cold air pressure p in front of the condenser module c1 1. Dry bulb temperature of cold air after condenser module (t) cd2 The cold air pressure p after the condenser module c2 Cold air flow rate V ca Condensate volume (m) cw ;

[0082] S3. Process the corresponding parameters:

[0083] 1) The wet-bulb temperature of the hot air before the condenser module corresponds to the saturated vapor pressure (where is the absolute temperature):

[0084]

[0085] 2) The saturated vapor pressure corresponding to the dry-bulb temperature of the hot air before the condenser module (where is the absolute temperature):

[0086]

[0087] 3) Relative humidity of the hot air in front of the condenser module:

[0088] φ h1 =(p″ v,hw1 -0.000662*p h1 *(t hd1 -t hw1 )) / p″ v,hd1

[0089] 4) Moisture content of hot air before the condenser module:

[0090] x h1 =0.622*φ h1 *p″ v,hd1 / (p h1 -φ h1 *p″ v,hd1 )

[0091] 5) Enthalpy of hot air before the condenser module:

[0092]

[0093] 6) Density of hot, moist air in front of the condenser module (where is the absolute temperature):

[0094] ρ hw1 =0.003483*p h1 / T hd1 -0.001316*φ h1 *p″ v,hd1 / T hd1

[0095] 7) Dry air density of hot air in front of the condenser module:

[0096]

[0097] 8) The dry-bulb temperature of the hot air after the condenser module corresponds to the saturated vapor pressure (the air is saturated, the dry-bulb temperature is equal to the wet-bulb temperature, where is the absolute temperature):

[0098]

[0099] 9) Moisture content of hot air after the condenser module:

[0100] x h2 =0.622*p″ v,hd2 / (ph2 -p″ v,hd2 )

[0101] 10) Enthalpy of hot air after the condenser module:

[0102]

[0103] 11) Density of humidified hot air after the condenser module (where is the absolute temperature):

[0104] ρ hw2 =0.003483*p h2 / T hd2 -0.001316*p″ v,hd2 / T hd2

[0105] 12) The wet-bulb temperature of the cold air before the condenser module corresponds to the saturated vapor pressure (where is the absolute temperature):

[0106]

[0107] 13) The dry-bulb temperature of the cold air before the condenser module corresponds to the saturated vapor pressure:

[0108]

[0109] 14) Calculate the relative humidity of the cold air in front of the condenser module:

[0110] φ c1 =(p″ v,cw1 -0.000662*p c1 *(t cd1 -t cw1 )) / p″ v,cd1

[0111] 15) Moisture content of the cold air in front of the condenser module:

[0112] x c1 =0.622*φ c1 *p″ v,cd1 / (p c1 -φ c1 *p″ v,cd1 )

[0113] 16) Enthalpy of cold air in front of the condenser module:

[0114]

[0115] 17) Density of moist air in front of the condenser module (where is the absolute temperature):

[0116] ρ cw1 =0.003483*p c1 / T cd1 -0.001316*φ c1 *p″ v,cd1 / T cd1

[0117] 18) Density of dry air in front of the condenser module:

[0118]

[0119] 19) The dry-bulb temperature of the cold air after the condenser module corresponds to the saturated vapor pressure:

[0120]

[0121] 20) Enthalpy of cold air after condensation module (moisture content remains unchanged):

[0122]

[0123] 21) Density of humidified cold air after the condenser module (where is the absolute temperature):

[0124] ρ cw2 =0.003483*p c2 / T cd2 -0.001316*p″ v,cd2 / T cd2

[0125] S4. Calculation of heat transfer coefficient of condensing module:

[0126] The logarithmic mean temperature difference between the hot and cold air in the condenser module is:

[0127]

[0128] The heat transfer coefficient of the condenser module is:

[0129]

[0130] In the formula, A is the total heat exchange area of ​​the condensing module;

[0131] S5. Calculation of resistance coefficient of condensing module:

[0132] The drag coefficient on the hot air side is:

[0133]

[0134] In the formula S h This refers to the cross-sectional area of ​​the hot air side condenser module;

[0135] The drag coefficient on the cold air side is:

[0136]

[0137] In the formula S c This refers to the cross-sectional area of ​​the condenser module on the cold air side;

[0138] S6. Water-saving performance evaluation of the condenser module:

[0139] Under different test conditions (test parameters include the hot air dry and wet bulb temperatures and flow rate in front of the condenser module, and the cold air dry and wet bulb temperatures and flow rate in front of the condenser module), two methods for calculating the water saving of the condenser module are included:

[0140] 1) Calculate water savings based on condensate flow:

[0141]

[0142] In the formula, t refers to the duration of condensate collection;

[0143] 2) Calculate water savings by observing changes in the state of hot air:

[0144] Δm cw =V ha *ρ hd *(x h1 -x h2 ).

[0145] Among them, the absolute value of the thermal balance error Δε at the effective operating point of the condensing module is no greater than 7% in the thermal balance calculation.

[0146]

[0147] The working principle of the testing device in this invention is as follows: Ambient air enters from the air inlet 1 at the bottom of the test tower under the suction of the main fan 25, enters the bottom of the test tower through the second ventilation duct 2, and flows upward into the packing 5. At the same time, the submersible pump 9 in the water storage tank 8 pumps circulating water into the second heater 11 for heating, and then sprays it down from the top of the packing 5 through the water distribution system 13. The air and circulating water exchange heat in the packing 5. Subsequently, the circulating water falls into the water collection tank 6 at the bottom of the test tower and returns to the water storage tank 8 through the pipe. The hot air flows upward, passes through the water collector 14 and the condensation module 21, and is discharged through the pipe at the hot air outlet 26. Meanwhile, the cooler 17 draws in cold air, heats it to the set temperature through the first heater 18, and then enters the condensation module 21 to exchange heat with the hot air. The nearly saturated hot air is cooled, and some of the water vapor in it is condensed and collected by the condensate collection tank 16. The cold air is discharged from the cold air outlet 23.

[0148] The water-saving performance testing method for condensing modules provided by this invention can evaluate the water-saving effect of different condensing modules and provide a reference for the optimization or selection of condensing modules.

[0149] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structures made using the contents of the present invention specification and drawings, whether directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of the present invention.

Claims

1. A method for testing the thermal resistance characteristics and water-saving performance of a condensing module, characterized in that, Includes the following steps: S1. Construction of the testing device: The testing device includes a test tower, inside which is a condensation module. Below the condensation module is a condensate collection tank, below which is a water collector, below which is a water distribution system, and below which is packing material. The top of the test tower is connected to a main fan, which has a hot air outlet. One side of the test tower located on the condensation module is connected to a cold air fan via a first ventilation duct, which contains a first heater. The other side of the test tower located on the condensation module is connected to a cold air outlet. One bottom side of the test tower is connected to an air inlet via a second ventilation duct. The bottom of the test tower has a water collection tank, which is connected to a water storage tank via an outlet pipe. The water storage tank contains a submersible pump, which is connected to the water distribution system via a circulating water pipe, which contains a second heater. The system includes a first vortex flow meter on the first ventilation duct, a second vortex flow meter on the second ventilation duct, and an electromagnetic flow meter on the circulating water duct. The first ventilation duct contains cold air pressure and wet / dry bulb temperature measuring points, and the cold air outlet contains cold air pressure and dry bulb temperature measuring points. The test tower contains hot air pressure and wet / dry bulb temperature measuring points located between the condensate collection tank and the water collector, and above the condensation module. The second ventilation duct contains inlet air wet / dry bulb temperature measuring points. The main fan, air cooler, and submersible pump are all regulated by frequency converters. S2. Collect relevant parameters using the testing device, including: inlet air pressure p. a Inlet air dry bulb temperature t d1 Inlet air wet-bulb temperature t w1 Inlet airflow V ha Circulating water flow rate V w 1. Hot air dry bulb temperature t in front of the condenser module hd1 1. Wet-bulb temperature of hot air in front of the condenser module (t) hw1 Hot air pressure p before the condenser module h1 1. Hot air dry bulb temperature t after condenser module hd2 1. Hot air pressure p after condenser module h2 1. Dry bulb temperature of cold air in front of the condenser module (t) cd1 1. Wet-bulb temperature of cold air in front of the condenser module (t) cw1 Cold air pressure p in front of the condenser module c1 1. Dry bulb temperature of cold air after condenser module (t) cd2 The cold air pressure p after the condenser module c2 Cold air flow rate V ca Condensate volume (m) cw ; S3. Process the corresponding parameters: 1) The wet-bulb temperature of the hot air before the condenser module corresponds to the saturated vapor pressure: 2) The dry-bulb temperature of the hot air before the condenser module corresponds to the saturated vapor pressure: 3) Relative humidity of the hot air in front of the condenser module: φ h1 =(p″ v，hw1 -0.000662*p h1 *(t hd1 -t hw1 )) / p″ v，hd1 4) Moisture content of hot air before the condenser module: x h1 =0.622*φ h1 *p″ v，hd1 / (p h1 -f h1 *p″ v，hd1 ) 5) Enthalpy of hot air before the condenser module: 6) Density of hot, moist air in front of the condenser module: r hw1 =0.003483*p h1 / T hd1 -0.001316*φ h1 *p″ v，hd1 / T hd1 7) Density of hot, dry air in front of the condenser module: 8) The saturated vapor pressure corresponding to the dry-bulb temperature of the hot air after the condenser module: 9) Moisture content of hot air after the condenser module: x h2 =0.622*p″ v，hd2 / (p h2 -p″ v，hd2 ) 10) Enthalpy of hot air after the condenser module: 11) Density of hot, moist air after the condenser module: ρ hw2 =0.003483*p h2 / T hd2 -0.001316*p″ v，hd2 / T hd2 12) The wet-bulb temperature of the cold air before the condenser module corresponds to the saturated vapor pressure: 13) The dry-bulb temperature of the cold air before the condenser module corresponds to the saturated vapor pressure: 14) Calculate the relative humidity of the cold air in front of the condenser module: φ c1 =(p″ v,cw1 -0.000662*p c1 *(t cd1 -t cw1 )) / p″ v,cd1 15) Moisture content of the cold air in front of the condenser module: x c1 =0.622*φ c1 *p″ v,cd1 / (p c1 -f c1 *p″ v,cd1 ) 16) Enthalpy of cold air in front of the condenser module: 17) Density of moist air in front of the condenser module: r cw1 =0.003483*p c1 / T cd1 -0.001316*φ c1 *p″ v,cd1 / T cd1 18) Density of dry air in front of the condenser module: 19) The dry-bulb temperature of the cold air after the condenser module corresponds to the saturated vapor pressure: 20) Enthalpy of cold air after condenser module: 21) Density of humidified cold air after the condenser module: ρ cw2 =0.003483*p c2 / T cd2 -0.001316*p″ v,cd2 / T cd2 S4. Calculation of heat transfer coefficient of condensing module: The logarithmic mean temperature difference between the hot and cold air in the condenser module is: The heat transfer coefficient of the condenser module is: In the formula, A is the total heat exchange area of ​​the condensing module; S5. Calculation of resistance coefficient of condensing module: The drag coefficient on the hot air side is: In the formula S h This refers to the cross-sectional area of ​​the hot air side condenser module; The drag coefficient on the cold air side is: In the formula S c This refers to the cross-sectional area of ​​the condenser module on the cold air side; S6. Water-saving performance evaluation of the condenser module: Under different test conditions (test parameters include the hot air dry and wet bulb temperatures and flow rate in front of the condenser module, and the cold air dry and wet bulb temperatures and flow rate in front of the condenser module), two methods for calculating the water saving of the condenser module are included: 1) Calculate water savings based on condensate flow: In the formula, t refers to the duration of condensate collection; 2) Calculate water savings by observing changes in the state of hot air: Δm cw =V ha *ρ hd *(x h1 -x h2 )。 2. The method for testing the thermal resistance characteristics and water-saving performance of a condensing module as described in claim 1, characterized in that, For the thermal balance calculation of the condensing module, the absolute value of the thermal balance error Δε at the effective operating point is no greater than 7%.

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