CN109374322B - Water chilling unit testing device with heat recovery function - Google Patents
Water chilling unit testing device with heat recovery function Download PDFInfo
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- CN109374322B CN109374322B CN201811129878.XA CN201811129878A CN109374322B CN 109374322 B CN109374322 B CN 109374322B CN 201811129878 A CN201811129878 A CN 201811129878A CN 109374322 B CN109374322 B CN 109374322B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M99/00—Subject matter not provided for in other groups of this subclass
- G01M99/002—Thermal testing
Abstract
The invention belongs to the technical field of heat pump unit testing, and particularly relates to a testing device for a water chilling unit with a heat recovery function. The device comprises an evaporator side circulation pipeline connected with an evaporator, a condenser side circulation pipeline connected with a condenser, a heat recoverer side circulation pipeline connected with a heat recoverer, a second water adding circulation pipeline, and an external cold source, or the evaporator side circulation pipeline, or the condenser side circulation pipeline is communicated with the second water adding circulation pipeline. The invention has the advantages that: the invention provides a heat recovery device with independent pipelines and equipment, can meet the simulation experiment of a water chilling unit with a heat recovery function, and can carry out the simulation experiment of partial heat recovery and total heat recovery.
Description
Technical Field
The invention relates to the technical field of heat pump unit testing, in particular to a cold water unit testing device with a heat recovery function.
Background
The heat released by the cooling water of the water chilling unit is usually discharged to the surrounding environment by the cooling tower, which is a huge waste for the places needing heat, such as hotels, factories, hospitals and the like, and simultaneously brings certain waste heat pollution to the surrounding environment. The heat recovery technology is to recycle a large amount of waste heat discharged to the outside in the running process of the water chilling unit in a certain mode, and the waste heat is used as a final heat source or a primary heat source of a user for preheating air conditioning water or air, heating industrial water and the like, so that energy can be saved, equipment running cost and noise can be reduced, the running time of a cooling tower and a cooling pump can be shortened, and the running cost and environmental pollution can be reduced by heat recovery, thereby achieving the aims of saving energy and reducing emission. The existing testing device for testing the water chilling unit cannot achieve the aim, so that the testing device for testing the water chilling unit with the heat recovery function is urgently needed.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention provides a water chilling unit testing device with a heat recovery function.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a test takes cooling water set testing arrangement of heat recovery function, includes the evaporimeter side circulation pipeline that is connected with the evaporimeter, the condenser side circulation pipeline that is connected with the condenser, evaporimeter side circulation pipeline and condenser side circulation pipeline are through first water mixing circulation pipeline intercommunication, and this device still includes the heat recovery device side circulation pipeline that is connected with the heat recovery device, and heat recovery device side circulation pipeline forms closed circulation with the heat recovery device, and the device still includes the second and adds the water circulation pipeline, heat recovery device side circulation pipeline and outside cold source, or with evaporimeter side circulation pipeline, or with condenser side circulation pipeline through second water mixing circulation pipeline intercommunication.
Preferably, the evaporator side circulation pipeline, the condenser side circulation pipeline and the heat recovery device side circulation pipeline are respectively provided with a pump body for circulating water of the evaporator, the condenser and the heat recovery device, and connecting points of the second water adding circulation pipeline and the evaporator side circulation pipeline, the condenser side circulation pipeline and the heat recovery device side circulation pipeline are respectively arranged on pipelines at inlets of the pump bodies in the corresponding circulation pipelines.
Preferably, flowmeters for measuring the flow rate on the circulation pipelines are arranged on the evaporator side circulation pipeline, the condenser side circulation pipeline and the heat recovery device side circulation pipeline, and the flowmeters are arranged on pipelines at the outlets of the pump bodies in the corresponding circulation pipelines.
Preferably, thermometers for measuring the temperatures of the water inlet end and the water outlet end of the evaporator, the condenser and the heat recoverer are correspondingly arranged on the evaporator side circulating pipeline, the condenser side circulating pipeline and the heat recoverer side circulating pipeline respectively.
Preferably, control valves for controlling flow on the circulation pipelines are arranged on the circulation pipelines at the evaporator side, the condenser side and the heat recovery device side respectively, and the control valves are respectively a cold water valve, a cooling water valve and a heat recovery water valve.
Preferably, the second water mixing circulation pipeline comprises a second driving branch and a second return pipeline, a first water pump is arranged on the second driving branch, and the input end of the first water pump is the input end of the second driving branch;
when the second water mixing circulation pipeline is connected between the heat recoverer side circulation pipeline and the condenser side circulation pipeline, the input end of the second driving branch is connected with the heat recoverer side circulation pipeline, the output end of the second driving branch is connected with the condenser side circulation pipeline, water is output into the heat recoverer side circulation pipeline from the condenser side circulation pipeline through a second return pipeline, the connection point of the second return pipeline and the heat recoverer side circulation pipeline is close to the output end of the heat recoverer relative to the connection point of the second driving branch input end and the heat recoverer side circulation pipeline, and the connection point of the second driving branch output end and the condenser side circulation pipeline is close to the output end of the corresponding condenser relative to the connection point of the second return pipeline and the condenser side circulation;
when the second water mixing circulation pipeline is connected between the heat recoverer side circulation pipeline and the evaporator side circulation pipeline, the input end of the second driving branch is connected with the heat recoverer side circulation pipeline, the output end of the second driving branch is connected with the evaporator side circulation pipeline, water is output into the heat recoverer side circulation pipeline from the evaporator side circulation pipeline through the second return pipeline, the connection point of the second return pipeline and the heat recoverer side circulation pipeline is close to the output end of the heat recoverer relative to the connection point of the second driving branch input end and the heat recoverer side circulation pipeline, and the connection point of the second driving branch output end and the evaporator side circulation pipeline is close to the output end of the evaporator relative to the connection point of the second return pipeline and the evaporator side circulation.
Preferably, the first water adding circulation pipeline comprises a first driving branch and a first return pipeline, a cooling water adding pump is arranged on the first driving branch, the input end of the cooling water adding pump is the input end of the first driving branch, the input end of the first driving branch is connected with the condenser side circulation pipeline, the output end of the first driving branch is connected with the evaporator side circulation pipeline, water is output into the condenser side circulation pipeline from the evaporator side circulation pipeline through the first return pipeline, the connection point of the first return pipeline and the condenser side circulation pipeline is close to the output end of the condenser relative to the connection point of the first driving branch input end and the condenser side circulation pipeline, and the connection point of the first driving branch output end and the evaporator side circulation pipeline is close to the output end of the evaporator relative to the connection point of the first return pipeline and the evaporator side circulation.
Optimally, pump bodies on the evaporator side circulation pipeline, the condenser side circulation pipeline and the heat recovery device side circulation pipeline are respectively a cold water pump, a cooling water pump and a heat recovery water pump, and are frequency conversion water pumps.
Optimized, the device still includes that the third is converted the water circulation pipeline, the third is converted the water circulation pipeline and is included third drive branch road and third return line, be provided with the cooling on the third drive branch road and add the water pump, the cooling adds the input of water pump and is the input of third drive branch road, the cooling adds the output of water pump and sets up on the pipeline of heat recovery water pump entrance with condenser side circulation pipeline tie point, on the pipeline between the output of condenser and the cooling water pump promptly, the cooling adds the output of water pump and condenser side circulation pipeline tie point and is close to the entrance of cooling water pump, the third return line is close to the output of condenser with condenser side circulation pipeline tie point.
The invention has the advantages that:
(1) the invention provides a heat recovery device with independent pipelines and equipment, can meet the simulation experiment of a water chilling unit with a heat recovery function, and can carry out the simulation experiment of partial heat recovery and total heat recovery.
(2) The invention controls the input quantity of an upstream cold source to cool water entering the heat recoverer through the heat recovery water adding pump, so as to simulate parameters such as the flow quantity, the temperature and the like of hot water entering and exiting the heat recoverer to test a water chilling unit with a heat recovery function.
(3) The invention is provided with the second water mixing circulating pipeline, and the high-temperature water in the circulating pipeline at the heat recoverer side and the cooling water in the circulating pipeline at the condenser side exchange heat, thereby simplifying the cooling scheme of the whole device. Or the high-temperature water in the circulating pipeline at the heat recoverer side and the low-temperature water in the circulating pipeline at the evaporator side exchange heat, so that the running flow and the overall energy consumption of the first water pump are reduced.
(4) In the first water mixing circulating pipeline and the second water mixing circulating pipeline, the first driving branch and the first return pipeline are arranged in a crossed mode, and the second driving branch and the second return pipeline are arranged in a crossed mode, so that the testing device can obtain larger heat exchange temperature difference.
Drawings
Fig. 1 is a schematic structural diagram of a test device for testing a water chilling unit with a heat recovery function in embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of a test device for testing a water chilling unit with a heat recovery function in embodiment 2 of the present invention.
Fig. 3 is a schematic structural diagram of a test device for testing a water chilling unit with a heat recovery function in embodiment 3 of the present invention.
The notations in the figures have the following meanings:
1-1-cold water pump 1-2-cooling water pump 1-3-heat recovery water pump 1-4-cooling water charging pump
1-5-Cooling Water Pump 1-6-first Water Pump
2-1-cold water valve 2-2-cooling water valve 2-3-heat recovery water valve
3-1-cold water flowmeter 3-2-cooling water flowmeter 3-3-heat recovery water flowmeter
4-1-evaporator 4-2-condenser 4-3-heat recoverer
T1-evaporator water inlet thermometer T2-evaporator water outlet thermometer
T3-condenser water inlet thermometer T4-condenser water outlet thermometer
T5-heat recovery device water outlet thermometer T6-heat recovery device water inlet thermometer
Detailed Description
Example 1
As shown in fig. 1, a testing device for testing a water chilling unit with a heat recovery function comprises an evaporator side circulation pipeline connected with an evaporator 4-1, a condenser side circulation pipeline connected with a condenser 4-2, a heat recoverer side circulation pipeline connected with a heat recoverer 4-3, a first water mixing circulation pipeline, a second water mixing circulation pipeline and a third water mixing circulation pipeline. The evaporator 4-1 and the evaporator side circulation pipeline, the condenser 4-2 and the condenser side circulation pipeline, and the heat recovery device side circulation pipeline and the heat recovery device 4-3 form closed circulation. The evaporator side circulation pipeline is communicated with the condenser side circulation pipeline through a first water adding circulation pipeline, the heat recovery device side circulation pipeline is communicated with an external cold source through a second water adding circulation pipeline, and the condenser side circulation pipeline is communicated with the external cold source through a third water adding circulation pipeline.
An evaporator water outlet thermometer T2, a cold water pump 1-1, a cold water valve 2-1, a cold water flowmeter 3-1 and an evaporator water inlet thermometer T1 are sequentially arranged on the circulating pipeline at the evaporator side from the output end of the evaporator 4-1 to the input end;
a condenser water outlet thermometer T4, a cooling water pump 1-2, a cooling water valve 2-2, a cooling water flowmeter 3-2 and a condenser water inlet thermometer T3 are sequentially arranged on the condenser side circulating pipeline in the direction from the output end to the input end of the condenser 4-2;
the heat recovery device side circulation pipeline is sequentially provided with a heat recovery device water outlet thermometer T5, a heat recovery water pump 1-3, a heat recovery water valve 2-3, a heat recovery water flowmeter 3-3 and a heat recovery device water inlet thermometer T6 from the output end to the input end of the heat recovery device 4-3.
The cold water pump 1-1, the cooling water pump 1-2 and the heat recovery water pump 1-3 are all variable frequency water pumps.
The first water mixing circulation pipeline comprises a first driving branch and a first return pipeline, a cooling water mixing pump 1-4 is arranged on the first driving branch, the input end of the cooling water mixing pump 1-4 is the input end of the first driving branch, the input end of the first driving branch is connected with the condenser side circulation pipeline, the output end of the first driving branch is connected with the evaporator side circulation pipeline, water is output into the condenser side circulation pipeline from the evaporator side circulation pipeline through the first return pipeline, the connection point of the first return pipeline and the condenser side circulation pipeline is close to the output end of the condenser 4-2 relative to the connection point of the first driving branch input end and the condenser side circulation pipeline, and the connection point of the first driving branch output end and the evaporator side circulation pipeline is close to the output end of the evaporator 4-1 relative to the connection point of the first return pipeline and the evaporator side.
The second water mixing circulation pipeline comprises a second driving branch and a second return pipeline, a first water pump 1-6 is arranged on the second driving branch, and the input end of the first water pump 1-6 is the input end of the second driving branch. The connection point of the output end of the first water pump 1-6 and the side circulation pipeline of the heat recovery device is arranged on the pipeline at the inlet of the heat recovery water pump 1-3, namely the pipeline between the output end of the heat recovery device 4-3 and the heat recovery water pump 1-3. In this embodiment, the junction of the output of the first water pump 1-6 with the recuperator-side circulation line is near the inlet of the heat recovery water pump 1-3, and the junction of the second return line with the recuperator-side circulation line is near the output of the recuperator 4-3.
The third water mixing circulation pipeline comprises a third driving branch and a third return pipeline, a cooling water adding pump 1-5 is arranged on the third driving branch, the input end of the cooling water adding pump 1-5 is the input end of the third driving branch, and the connecting point of the output end of the cooling water adding pump 1-5 and the condenser side circulation pipeline is arranged on a pipeline at the inlet of the heat recovery water pump 1-3, namely the pipeline between the output end of the condenser 4-2 and the cooling water pump 1-2. In this embodiment, the connection point of the output of the cooling water pump 1-5 and the condenser-side circulation line is close to the inlet of the cooling water pump 1-2, and the connection point of the third return line and the condenser-side circulation line is close to the output of the condenser 4-2.
The energy of a cold source is transferred to circulating hot water (high-temperature water) entering a heat recovery device 4-3 by controlling a first water pump 1-6, so that the temperature of the circulating hot water meets the requirement of a set simulation experiment; sending the circulating hot water into a heat recovery device 4-3 to simulate heat recovery circulation through a heat recovery water pump 1-3; cold water (low-temperature water) generated by the evaporator 4-1 completes cold water circulation through a cold water pump 1-1, cooling water (medium-temperature water) generated by the condenser 4-2 completes cooling water circulation through a cooling water pump 1-2, a cooling water charging pump 1-4 is arranged between the cold water and the cooling water, part of the cooling water is charged into the cold water circulation, the temperature of the water at the input end of the evaporator 4-1 in the cold water circulation is maintained, and the residual heat in the cooling water circulation is balanced by cold source water. The input quantity of an upstream cold source is controlled by the first water pump 1-6 to cool water entering a circulating pipeline at the side of the heat recoverer, so that parameters such as the flow quantity, the temperature and the like of hot water entering and exiting the heat recoverer 4-3 are simulated to test a water chilling unit with a heat recovery function.
Respectively adjusting the water flow of respective circulation by controlling the output of a cold water pump 1-1, a cooling water pump 1-2 and a heat recovery water pump 1-3, wherein the flow of the circulation water is respectively measured by a cold water flow meter 3-1, a cooling water flow meter 3-2 and a heat recovery water flow meter 3-3; the water inlet temperature of the condenser 4-2 is adjusted by controlling the output of the frequency converter attached to the cooling water adding pump 1-5, the water inlet temperature of the heat recovery device 4-3 is adjusted by controlling the output of the frequency converter attached to the first water pump 1-6, and the water inlet temperature of the evaporator 4-1 is adjusted by controlling the output of the frequency converter attached to the cooling water adding pump 1-4.
Example 2
As shown in fig. 2, a testing device for testing a water chilling unit with a heat recovery function comprises an evaporator side circulation pipeline connected with an evaporator 4-1, a condenser side circulation pipeline connected with a condenser 4-2, a heat recoverer side circulation pipeline connected with a heat recoverer 4-3, a first water mixing circulation pipeline, a second water mixing circulation pipeline and a third water mixing circulation pipeline. The evaporator 4-1 and the evaporator side circulation pipeline, the condenser 4-2 and the condenser side circulation pipeline, and the heat recovery device side circulation pipeline and the heat recovery device 4-3 form closed circulation. The evaporator side circulation pipeline is communicated with the condenser side circulation pipeline through a first water adding circulation pipeline, the heat recoverer side circulation pipeline is communicated with the condenser side circulation pipeline through a second water adding circulation pipeline, and the condenser side circulation pipeline is communicated with an external cold source through a third water adding circulation pipeline.
An evaporator water outlet thermometer T2, a cold water pump 1-1, a cold water valve 2-1, a cold water flowmeter 3-1 and an evaporator water inlet thermometer T1 are sequentially arranged on the circulating pipeline at the evaporator side from the output end of the evaporator 4-1 to the input end;
a condenser water outlet thermometer T4, a cooling water pump 1-2, a cooling water valve 2-2, a cooling water flowmeter 3-2 and a condenser water inlet thermometer T3 are sequentially arranged on the condenser side circulating pipeline in the direction from the output end to the input end of the condenser 4-2;
the heat recovery device side circulation pipeline is sequentially provided with a heat recovery device water outlet thermometer T5, a heat recovery water pump 1-3, a heat recovery water valve 2-3, a heat recovery water flowmeter 3-3 and a heat recovery device water inlet thermometer T6 from the output end to the input end of the heat recovery device 4-3.
The cold water pump 1-1, the cooling water pump 1-2 and the heat recovery water pump 1-3 are all variable frequency water pumps.
The first water mixing circulation pipeline comprises a first driving branch and a first return pipeline, a cooling water mixing pump 1-4 is arranged on the first driving branch, the input end of the cooling water mixing pump 1-4 is the input end of the first driving branch, the input end of the first driving branch is connected with the condenser side circulation pipeline, the output end of the first driving branch is connected with the evaporator side circulation pipeline, water is output into the condenser side circulation pipeline from the evaporator side circulation pipeline through the first return pipeline, the connection point of the first return pipeline and the condenser side circulation pipeline is close to the output end of the condenser 4-2 relative to the connection point of the first driving branch input end and the condenser side circulation pipeline, and the connection point of the first driving branch output end and the evaporator side circulation pipeline is close to the output end of the evaporator 4-1 relative to the connection point of the first return pipeline and the evaporator side.
The second water mixing circulation pipeline comprises a second driving branch and a second return pipeline, a first water pump 1-6 is arranged on the second driving branch, and the input end of the first water pump 1-6 is the input end of the second driving branch. The input end of the second driving branch is connected with the heat recoverer side circulation pipeline, the output end of the second driving branch is connected with the condenser side circulation pipeline, water is output into the heat recoverer side circulation pipeline from the condenser side circulation pipeline through a second return pipeline, the connection point of the second return pipeline and the heat recoverer side circulation pipeline is close to the output end of the heat recoverer 4-3 relative to the connection point of the second driving branch input end and the heat recoverer side circulation pipeline, and the connection point of the second driving branch output end and the condenser side circulation pipeline is close to the output end of the corresponding condenser 4-2 relative to the connection point of the second return pipeline and the condenser side circulation pipeline.
The third water mixing circulation pipeline comprises a third driving branch and a third return pipeline, a cooling water adding pump 1-5 is arranged on the third driving branch, the input end of the cooling water adding pump 1-5 is the input end of the third driving branch, and the connecting point of the output end of the cooling water adding pump 1-5 and the condenser side circulation pipeline is arranged on a pipeline at the inlet of the heat recovery water pump 1-3, namely the pipeline between the output end of the condenser 4-2 and the cooling water pump 1-2. In this embodiment, the connection point of the output of the cooling water pump 1-5 and the condenser-side circulation line is close to the inlet of the cooling water pump 1-2, and the connection point of the third return line and the condenser-side circulation line is close to the output of the condenser 4-2.
In the embodiment, the effluent of the heat recovery device 4-3 and the effluent of the condenser 4-2 are subjected to heat exchange through the first water pump 1-6, so that the purpose of energy recovery is achieved, and the influence on the operation of the whole device caused by different energy distribution of the heat recovery device 4-3 and the condenser 4-2 in the embodiment 1 can be avoided.
Example 3
As shown in fig. 3, a testing device for testing a water chilling unit with a heat recovery function comprises an evaporator side circulation pipeline connected with an evaporator 4-1, a condenser side circulation pipeline connected with a condenser 4-2, a heat recoverer side circulation pipeline connected with a heat recoverer 4-3, a first water mixing circulation pipeline, a second water mixing circulation pipeline and a third water mixing circulation pipeline. The evaporator 4-1 and the evaporator side circulation pipeline, the condenser 4-2 and the condenser side circulation pipeline, and the heat recovery device side circulation pipeline and the heat recovery device 4-3 form closed circulation. The evaporator side circulation pipeline is communicated with the condenser side circulation pipeline through a first water adding circulation pipeline, the heat recoverer side circulation pipeline is communicated with the evaporator side circulation pipeline through a second water adding circulation pipeline, and the condenser side circulation pipeline is communicated with an external cold source through a third water adding circulation pipeline.
An evaporator water outlet thermometer T2, a cold water pump 1-1, a cold water valve 2-1, a cold water flowmeter 3-1 and an evaporator water inlet thermometer T1 are sequentially arranged on the circulating pipeline at the evaporator side from the output end of the evaporator 4-1 to the input end;
a condenser water outlet thermometer T4, a cooling water pump 1-2, a cooling water valve 2-2, a cooling water flowmeter 3-2 and a condenser water inlet thermometer T3 are sequentially arranged on the condenser side circulating pipeline in the direction from the output end to the input end of the condenser 4-2;
the heat recovery device side circulation pipeline is sequentially provided with a heat recovery device water outlet thermometer T5, a heat recovery water pump 1-3, a heat recovery water valve 2-3, a heat recovery water flowmeter 3-3 and a heat recovery device water inlet thermometer T6 from the output end to the input end of the heat recovery device 4-3.
The cold water pump 1-1, the cooling water pump 1-2 and the heat recovery water pump 1-3 are all variable frequency water pumps.
The first water mixing circulation pipeline comprises a first driving branch and a first return pipeline, a cooling water mixing pump 1-4 is arranged on the first driving branch, the input end of the cooling water mixing pump 1-4 is the input end of the first driving branch, the input end of the first driving branch is connected with the condenser side circulation pipeline, the output end of the first driving branch is connected with the evaporator side circulation pipeline, water is output into the condenser side circulation pipeline from the evaporator side circulation pipeline through the first return pipeline, the connection point of the first return pipeline and the condenser side circulation pipeline is close to the output end of the condenser 4-2 relative to the connection point of the first driving branch input end and the condenser side circulation pipeline, and the connection point of the first driving branch output end and the evaporator side circulation pipeline is close to the output end of the evaporator 4-1 relative to the connection point of the first return pipeline and the evaporator side.
The second water mixing circulation pipeline comprises a second driving branch and a second return pipeline, a first water pump 1-6 is arranged on the second driving branch, and the input end of the first water pump 1-6 is the input end of the second driving branch. The input end of the second driving branch is connected with the circulation pipeline at the heat recoverer side, the output end of the second driving branch is connected with the circulation pipeline at the evaporator side, water is output into the circulation pipeline at the heat recoverer side from the circulation pipeline at the evaporator side through a second return pipeline, the connection point of the second return pipeline and the circulation pipeline at the heat recoverer side is close to the output end of the heat recoverer 4-3 relative to the connection point of the input end of the second driving branch and the circulation pipeline at the heat recoverer side, and the connection point of the output end of the second driving branch and the circulation pipeline at the evaporator side is close to the output end of the evaporator 4-1 relative.
The third water mixing circulation pipeline comprises a third driving branch and a third return pipeline, a cooling water adding pump 1-5 is arranged on the third driving branch, the input end of the cooling water adding pump 1-5 is the input end of the third driving branch, and the connecting point of the output end of the cooling water adding pump 1-5 and the condenser side circulation pipeline is arranged on a pipeline at the inlet of the heat recovery water pump 1-3, namely the pipeline between the output end of the condenser 4-2 and the cooling water pump 1-2. In this embodiment, the connection point of the output of the cooling water pump 1-5 and the condenser-side circulation line is close to the inlet of the cooling water pump 1-2, and the connection point of the third return line and the condenser-side circulation line is close to the output of the condenser 4-2.
In the embodiment, the effluent of the heat recovery device 4-3 and the effluent of the evaporator 4-1 are subjected to heat exchange through the first water pump 1-6, so that the purpose of energy recovery is achieved, and meanwhile, as the temperature difference between the effluent of the heat recovery device 4-3 and the effluent of the evaporator 4-1 is the maximum position of the temperature difference of the whole device, the same heat exchange amount only needs smaller running flow of the first water pump 1-6, so that the running energy consumption of the whole device is reduced.
The invention is not to be considered as limited to the specific embodiments shown and described, but is to be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.
Claims (7)
1. A test device for a water chilling unit with a heat recovery function comprises an evaporator side circulation pipeline connected with an evaporator (4-1) and a condenser side circulation pipeline connected with a condenser (4-2), wherein the evaporator side circulation pipeline is communicated with the condenser side circulation pipeline through a first water adding circulation pipeline;
and pump bodies for circulating water of the evaporator (4-1), the condenser (4-2) and the heat recoverer (4-3) are arranged on the circulating pipeline at the evaporator side, the circulating pipeline at the condenser side and the circulating pipeline at the heat recoverer side, and connecting points of the second water adding circulating pipeline and the circulating pipeline at the evaporator side, the circulating pipeline at the condenser side and the circulating pipeline at the heat recoverer side are arranged on pipelines at inlets of the pump bodies in the corresponding circulating pipelines.
2. The testing device for the water chilling unit with the heat recovery function according to claim 1, wherein thermometers for measuring the temperature at the water inlet end and the temperature at the water outlet end of the evaporator (4-1), the condenser (4-2) and the heat recovery device (4-3) are respectively and correspondingly arranged on the circulating pipeline at the evaporator side, the circulating pipeline at the condenser side and the circulating pipeline at the heat recovery device side.
3. The testing device for the water chilling unit with the heat recovery function according to claim 1, wherein the circulation pipeline at the evaporator side, the circulation pipeline at the condenser side and the circulation pipeline at the heat recovery device side are respectively provided with a control valve for controlling the flow rate on the circulation pipeline, and the control valves are respectively a cold water valve (2-1), a cooling water valve (2-2) and a heat recovery water valve (2-3).
4. The testing device for the water chilling unit with the heat recovery function according to claim 1, wherein the second water mixing circulation pipeline comprises a second driving branch and a second return pipeline, a first water pump (1-6) is arranged on the second driving branch, and the input end of the first water pump (1-6) is the input end of the second driving branch;
when the second water mixing circulation pipeline is connected between the heat recoverer side circulation pipeline and the condenser side circulation pipeline, the input end of the second driving branch is connected with the heat recoverer side circulation pipeline, the output end of the second driving branch is connected with the condenser side circulation pipeline, water is output into the heat recoverer side circulation pipeline from the condenser side circulation pipeline through a second return pipeline, the connection point of the second return pipeline and the heat recoverer side circulation pipeline is close to the output end of the heat recoverer (4-3) relative to the connection point of the second driving branch input end and the heat recoverer side circulation pipeline, and the connection point of the second driving branch output end and the condenser side circulation pipeline is close to the output end of the corresponding condenser (4-2) relative to the connection point of the second return pipeline and the condenser side circulation pipeline;
when the second water mixing circulation pipeline is connected between the heat recoverer side circulation pipeline and the evaporator side circulation pipeline, the input end of the second driving branch is connected with the heat recoverer side circulation pipeline, the output end of the second driving branch is connected with the evaporator side circulation pipeline, water is output into the heat recoverer side circulation pipeline from the evaporator side circulation pipeline through the second return pipeline, the connection point of the second return pipeline and the heat recoverer side circulation pipeline is close to the output end of the heat recoverer (4-3) relative to the connection point of the second driving branch input end and the heat recoverer side circulation pipeline, and the connection point of the second driving branch output end and the evaporator side circulation pipeline is close to the output end of the evaporator (4-1) relative to the connection point of the second return pipeline and the evaporator side circulation pipeline.
5. The testing device for the water chilling unit with the heat recovery function according to claim 3, wherein the first water adding circulation pipeline comprises a first driving branch and a first return pipeline, the first driving branch is provided with a cooling water adding pump (1-4), the input end of the cooling water adding pump (1-4) is the input end of the first driving branch, the input end of the first driving branch is connected with the condenser side circulation pipeline, the output end of the first driving branch is connected with the evaporator side circulation pipeline, water is output into the condenser side circulation pipeline from the evaporator side circulation pipeline through the first return pipeline, the connection point of the first return pipeline and the condenser side circulation pipeline is close to the output end of the condenser (4-2) relative to the connection point of the first driving branch input end and the condenser side circulation pipeline, and the connection point of the first driving branch output end and the evaporator side circulation pipeline is close to the evaporator (4) relative to the connection point of the first return pipeline and the evaporator side circulation pipeline -1) output.
6. The testing device for the water chilling unit with the heat recovery function according to claim 2, wherein the pump bodies on the evaporator side circulation pipeline, the condenser side circulation pipeline and the heat recovery device side circulation pipeline are respectively a cold water pump (1-1), a cooling water pump (1-2) and a heat recovery water pump (1-3), and are frequency conversion water pumps.
7. The testing device for the water chilling unit with the heat recovery function according to claim 1, characterized in that the device further comprises a third water mixing circulation pipeline, the third water mixing circulation pipeline comprises a third driving branch and a third return pipeline, a cooling water adding pump (1-5) is arranged on the third driving branch, the input end of the cooling water adding pump (1-5) is the input end of the third driving branch, the connection point of the output end of the cooling water adding pump (1-5) and the condenser side circulation pipeline is arranged on the pipeline at the inlet of the heat recovery water pump (1-3), namely on the pipeline between the output end of the condenser (4-2) and the cooling water pump (1-2), the connection point of the output end of the cooling water adding pump (1-5) and the condenser side circulation pipeline is close to the inlet of the cooling water pump (1-2), the connection point of the third return pipeline and the condenser side circulation pipeline is close to the output end of the condenser (4-2).
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| CN116754273B (en) * | 2023-08-11 | 2023-11-14 | 合肥通用机械研究院有限公司 | Cold water unit reverse temperature working condition testing system and working condition unit control strategy |
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| CN109374322A (en) | 2019-02-22 |
| CN111595603A (en) | 2020-08-28 |
| CN111595603B (en) | 2021-12-14 |
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