CN216285024U - Evaporative condenser performance test system - Google Patents
Evaporative condenser performance test system Download PDFInfo
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- CN216285024U CN216285024U CN202122639860.8U CN202122639860U CN216285024U CN 216285024 U CN216285024 U CN 216285024U CN 202122639860 U CN202122639860 U CN 202122639860U CN 216285024 U CN216285024 U CN 216285024U
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Abstract
The utility model discloses a performance test method and a system for an evaporative condenser. The test room is a closed space, the maintenance structure is subjected to heat preservation and moisture-proof treatment, and a drainage system is arranged inside the maintenance structure. The method can be used for testing the heat transfer performance of the evaporative condenser under different environmental conditions, has important guiding significance for engineering design selection, adopts the heat recovery system to recover the heat of a room and the cold of the main refrigeration system, does not need to additionally arrange a large-capacity cooling system for the tested room to maintain the working condition, and can greatly reduce the construction cost and the operation cost of a laboratory.
Description
Technical Field
The utility model relates to the field of performance experiments of refrigeration and heat exchangers, in particular to a performance test system for an evaporative condenser.
Background
Because the refrigeration system in the industrial freezing and food cold chain industry has larger energy consumption, which is contrary to the national policy of energy conservation and emission reduction and the aim of double carbon, the heat dissipation effect of the condenser of the refrigeration system directly concerns the energy consumption of the refrigeration system, and researches show that the energy consumption of the refrigeration system is increased by 3-4% when the condensation temperature of the refrigeration system is increased by 1 ℃. The evaporative condenser is generally adopted in the industry, the heat exchange process of the evaporative condenser relates to a complex heat and mass transfer process, the calculation is difficult to be accurate, and the equipment model selection capacity is too large or the capacity is insufficient due to experience or multiplication of an amplification factor when the domestic engineering design is selected, so that the material waste, the cost increase and a series of engineering problems are caused. The equipment is often large in capacity, the relationship between the heat exchange performance and the environmental temperature and humidity conditions is large, an accurate test scheme is not given in the industry standard, and domestic manufacturers rarely have laboratories for evaporative condensers, so that the parameters of the domestic manufacturers refer to the parameters of the domestic manufacturers, the data of a sample book are inaccurate, and the model selection of the industry is disordered. The evaporative condenser has the defects that as water is evaporated, the ion concentration of circulating water is increased, dirt is deposited on the wall of a heat pipe and a filler, and the heat exchange performance of the heat pipe is rapidly changed due to the dirt, so that the model selection design is more difficult, and inconvenience is brought to engineering design.
Disclosure of Invention
Based on the reasons, the utility model provides a performance test system of an evaporative condenser, and provides a method for testing the heat transfer performance of the evaporative condenser under different environmental conditions.
The test system mainly comprises a test room, a main refrigeration system, an auxiliary air conditioning system, a room heat recovery system, a collection system and a control system. The test room is a closed space, the maintenance structure is subjected to heat preservation and moisture-proof treatment, and a drainage system is arranged in the maintenance structure.
The main refrigeration system consists of a compressor, a tested prototype (evaporative condenser), a liquid accumulator, an electromagnetic valve, a throttle valve, a gas-liquid separator, an evaporator, a pipeline and an instrument, and is responsible for providing stable heat for the evaporative condenser so as to be dissipated to the environment of a testing room through the evaporative condenser.
The auxiliary air conditioning system consists of an auxiliary condensing unit, an auxiliary air conditioning box and a valve pipeline, wherein an auxiliary evaporator, an auxiliary electric heater and a first fan are installed in the auxiliary air conditioning box, and the main function of the auxiliary air conditioning system assists in maintaining the stable and rapid adjustment of the environmental conditions in the test room.
The room heat recovery system is composed of a heat recovery surface cooler, a fan II, a coolant pump I, a coolant pump II, a coolant box, corresponding valves and corresponding instruments, and has the main functions of recovering the cold energy of a main refrigerating system to the inside of a test room and balancing the heat dissipation capacity of the main refrigerating system to the test room, so that the temperature constancy of dry and wet balls of the tested room is within an acceptable range (the temperature of the main wet balls) without a large-capacity cold source, the construction cost and the operation energy consumption are reduced, meanwhile, the heat recovery system bears the heat source of the main refrigerating system, a heat source is not required to be additionally arranged, and the electric energy consumption is reduced, wherein the coolant comprises any one of the following working media: water, salt solution, organic alcohol solution such as glycol or other novel refrigerating medium solution.
The collection system mainly comprises the following components in the main refrigeration system: the test room comprises an exhaust temperature sensor T1, an evaporative cooling liquid temperature sensor T2, an air return temperature sensor T3, a high-pressure sensor P1 and a low-pressure sensor P2, wherein in the test room: the wet bulb temperature sensor TR1, air-out temperature and humidity sensor TR2, cooling water temperature sensor T6, moisturizing temperature sensor T7 are futilely gone into to the air inlet, among the heat recovery system: and the refrigerating medium temperature sensors T4 and T5, the refrigerating medium flow meter and the acquisition device are arranged on the evaporator.
The control system mainly comprises a control cabinet, a PLC, a touch screen and related electrical components.
Compared with the prior art, the utility model has the following beneficial effects.
1. The utility model can adjust the temperature and humidity of the environment and test the heat transfer performance under different working conditions, and has relatively accurate data test and important guiding significance for engineering design selection.
2. According to the utility model, the heat recovery system is adopted to recover the heat of the room and the cold of the main refrigerating system, and a large-capacity cooling system is not required to be additionally arranged in the test room to maintain the working condition of the test room, so that the construction cost and the operation cost of a laboratory can be greatly reduced.
3. The utility model can adopt a plurality of methods to test the heat discharge quantity of the evaporative condenser (an air side enthalpy difference method, a secondary refrigerant side enthalpy difference method, a refrigerant side enthalpy difference method and the like), and calculate and transfer heat coefficients to ensure more scientific and accurate data.
Drawings
FIG. 1 is an experimental schematic of the present invention.
In the figure: the system comprises a compressor 1, an evaporative condenser 2, a liquid storage device 3, a drying filter 4, an electromagnetic valve 5, a throttle valve 6, an evaporator 7, a high-low pressure controller 8, an auxiliary condensing unit 9, an auxiliary air conditioning box 10, an auxiliary evaporator 11, an auxiliary electric heater 12, a first fan 13, a second fan 14, a heat recovery surface air cooler 15, a test room 16, a fifth ball valve 17, a second coolant pump 18, a second filter 19, a fourth ball valve 20, a sixth ball valve 21, a sixth ball valve 22, a third ball valve 23, a first ball valve 24, a first filter 25, a flowmeter 26, a first coolant pump 27 and a second ball valve 28.
Detailed Description
The utility model discloses a performance test system of an evaporative condenser, which comprises the following specific implementation modes.
The exhaust port of the compressor 1 is connected with the air inlet of the heat exchange tube of the evaporative condenser 2, the liquid outlet tube of the heat exchange tube of the evaporative condenser 2 is connected with the inlet of the liquid accumulator 3, the outlet of the liquid accumulator 3 is connected with the inlet of the dry filter 4, the outlet of the dry filter 4 is connected with the inlet of the electromagnetic valve 5, the outlet of the electromagnetic valve 5 is connected with the inlet of the throttle valve 6, the outlet of the throttle valve 6 is connected with the refrigerant side inlet of the evaporator 7, the refrigerant side outlet of the evaporator 7 is connected with the inlet of the compressor 1, and the high-pressure end and the low-pressure end of the high-low pressure controller 8 are respectively connected with the exhaust pipe and the air suction pipe of the compressor 1, so that the main refrigerating system is formed.
The liquid supply pipe of the auxiliary condensing unit 9 is connected with the inlet of the auxiliary evaporator 11, the outlet of the auxiliary evaporator 11 is connected with the air suction port of the auxiliary condensing unit 9, and the auxiliary evaporator 11, the auxiliary heater 12 and the fan I13 are integrated in the auxiliary air conditioning box 10, so that the auxiliary air conditioning system is formed.
The secondary refrigerant box 22 is provided with four interfaces, a second interface of the secondary refrigerant box 22 is connected with a first 24 inlet of a ball valve, a first 24 outlet of the ball valve is connected with a first 25 inlet of a filter, a first 25 outlet of the filter is connected with a first 27 inlet of a secondary refrigerant pump, a first 27 outlet of the secondary refrigerant pump is connected with a second 28 inlet of the ball valve, a second 28 outlet of the ball valve is connected with a secondary refrigerant side inlet of the evaporator 7, a secondary refrigerant side outlet of the evaporator 7 is connected with an inlet of a flow meter 26, an outlet of the flow meter 26 is connected with a third 23 inlet of the ball valve, and an outlet of the third 23 of the ball valve is connected with the first interface of the secondary refrigerant box 22, so that a secondary refrigerant cooling system is formed; the fourth interface of the secondary refrigerant box 22 is connected with the fourth 20 inlet of the ball valve, the fourth 20 outlet of the ball valve is connected with the second 19 inlet of the filter, the second 19 outlet of the filter is connected with the second 18 inlet of the secondary refrigerant pump, the second 18 outlet of the secondary refrigerant pump is connected with the fifth 17 inlet of the ball valve, the fifth 17 outlet of the ball valve is connected with the secondary refrigerant side inlet of the heat recovery surface cooler 15, the secondary refrigerant outlet of the heat recovery surface cooler 15 is connected with the sixth 21 inlet of the ball valve, and the sixth 21 outlet of the ball valve is connected with the 22 interface of the secondary refrigerant box in three phases, so that a secondary refrigerant heating system is formed; the secondary refrigerant cooling system and the secondary refrigerant heating system form the room heat recovery system.
In the main refrigeration system: the exhaust gas temperature sensor T1 is arranged at the refrigerant side inlet of the evaporative condenser, the evaporative condenser outlet liquid temperature sensor T2 and the high pressure sensor P1 are arranged at the refrigerant side outlet of the evaporative condenser, and the return gas temperature sensor T3 and the low pressure sensor P2 are arranged at the refrigerant side outlet of the evaporative condenser; in the test room: the air inlet dry-wet bulb temperature sensor TR1 is installed at the air inlet of the evaporative condenser, the air outlet temperature and humidity sensor TR2 is installed at the air outlet of the evaporative condenser, the cooling water temperature sensor T6 is installed in the water tank of the evaporative condenser, and the water replenishing temperature sensor T7 is installed on the water replenishing pipe of the evaporative condenser; in the room heat recovery system: the secondary refrigerant temperature sensors T4 and T5 of the inlet and the outlet of the evaporator are respectively arranged at the secondary refrigerant side inlet and the secondary refrigerant side outlet of the evaporator, the secondary refrigerant flow meter is arranged at the secondary refrigerant side outlet of the evaporator, and all the sensors are connected with the acquisition device through signal lines, so that the acquisition system is formed.
The above-mentioned embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and to implement the same, and not to limit the scope of the present invention, and all equivalent changes and modifications made according to the spirit of the present invention should be covered by the scope of the present invention.
Claims (5)
1. An evaporative condenser performance test system which characterized in that: the device mainly comprises the following parts: the system comprises a test room, a main refrigeration system, an auxiliary air conditioning system, a room heat recovery system, an acquisition system and a control system; the test room is a closed space, the maintenance structure of the test room is subjected to heat preservation and moisture-proof treatment, and a drainage system is arranged in the test room; the main refrigerating system is a vapor compression type refrigerating system and consists of a compressor, an evaporative condenser, a liquid accumulator, a drying filter, an electromagnetic valve, a throttle valve, an evaporator, a gas-liquid separator, a high-low pressure controller, a pipeline and a valve; the auxiliary air conditioning system consists of an auxiliary condensing unit, an auxiliary air conditioning box and a valve pipeline, wherein an auxiliary evaporator, an auxiliary electric heater and a first fan are installed in the auxiliary air conditioning box; the room heat recovery system is composed of a secondary refrigerant temperature rising system and a secondary refrigerant temperature lowering system which are connected together through a secondary refrigerant box, and the secondary refrigerant box is provided with four interfaces: the interface I, the interface II, the interface III and the interface IV; the acquisition system comprises a temperature sensor, a pressure sensor, a flowmeter, a temperature and humidity sensor and an acquisition device; the control system comprises a PLC and a touch screen.
2. The evaporative condenser performance test system according to claim 1, wherein: the air outlet of a compressor of the main refrigeration system is connected with the air inlet of an evaporative condenser heat exchange tube of the main refrigeration system, the liquid outlet tube of the evaporative condenser heat exchange tube of the main refrigeration system is connected with the inlet of a liquid storage device of the main refrigeration system, the outlet of the liquid storage device of the main refrigeration system is connected with the inlet of a dry filter of the main refrigeration system, the outlet of the dry filter of the main refrigeration system is connected with the inlet of a solenoid valve of the main refrigeration system, the outlet of the solenoid valve of the main refrigeration system is connected with the inlet of a throttle valve of the main refrigeration system, the outlet of the throttle valve of the main refrigeration system is connected with the inlet of an evaporator refrigerant side of the main refrigeration system, the outlet of the evaporator refrigerant side of the main refrigeration system is connected with the inlet of a gas-liquid separator of the main refrigeration system, the outlet of the gas-liquid separator of the main refrigeration system is connected with the inlet of the main refrigeration system, and the high-pressure end and the low-pressure end of a high-low-pressure controller of the main refrigeration system are respectively connected with the exhaust tube and the air suction tube of the compressor of the main refrigeration system Are connected to thereby constitute the main refrigeration system.
3. The evaporative condenser performance test system according to claim 1, wherein: the auxiliary air conditioning system is characterized in that a liquid supply pipe of the auxiliary condensing unit is connected with an inlet of the auxiliary evaporator, an outlet of the auxiliary evaporator is connected with an air suction port of the auxiliary condensing unit, and the auxiliary evaporator, the auxiliary electric heater and the fan are integrated in the auxiliary air conditioning box, so that the auxiliary air conditioning system is formed.
4. The evaporative condenser performance test system according to claim 1, wherein: the secondary refrigerant box is provided with four interfaces, a secondary refrigerant box interface II is connected with a first ball valve inlet, a first ball valve outlet is connected with a first filter inlet, a first filter outlet is connected with a first secondary refrigerant pump inlet, a first secondary refrigerant pump outlet is connected with a second ball valve inlet, a second ball valve outlet is connected with an evaporator secondary refrigerant side inlet, an evaporator secondary refrigerant side outlet is connected with a flowmeter inlet, a flowmeter outlet is connected with a third ball valve inlet, and a third ball valve outlet is connected with a first secondary refrigerant box interface, so that the secondary refrigerant cooling system is formed; the fourth joint of the secondary refrigerant box is connected with the fourth inlet of the ball valve, the fourth outlet of the ball valve is connected with the second inlet of the filter, the second outlet of the filter is connected with the second inlet of the secondary refrigerant pump, the second outlet of the secondary refrigerant pump is connected with the fifth inlet of the ball valve, the fifth outlet of the ball valve is connected with the secondary refrigerant side inlet of the heat recovery surface cooler, the secondary refrigerant side outlet of the heat recovery surface cooler is connected with the sixth inlet of the ball valve, and the sixth outlet of the ball valve is connected with the three phases of the joint of the secondary refrigerant box, so that the secondary refrigerant heating system is formed; the secondary refrigerant cooling system and the secondary refrigerant heating system form the room heat recovery system.
5. The evaporative condenser performance test system according to claim 1, wherein: an exhaust gas temperature sensor T1 is arranged at the refrigerant side inlet of the evaporative condenser, an outlet liquid temperature sensor T2 and a high-pressure sensor P1 of the evaporative condenser are arranged at the refrigerant side outlet of the evaporative condenser, and a return gas temperature sensor T3 and a low-pressure sensor P2 are arranged at the refrigerant side outlet of the evaporator; in the test room: an air inlet dry-wet bulb temperature sensor TR1 is installed at an air inlet of the evaporative condenser, an air outlet temperature and humidity sensor TR2 is installed at an air outlet of the evaporative condenser, a cooling water temperature sensor T6 is installed in a water tank of the evaporative condenser, and a water replenishing temperature sensor T7 is installed on a water replenishing pipe of the evaporative condenser; in the room heat recovery system: the secondary refrigerant temperature sensors T4 and T5 of the inlet and the outlet of the evaporator are respectively arranged at the secondary refrigerant side inlet and the secondary refrigerant side outlet of the evaporator, the secondary refrigerant flow meter is arranged at the secondary refrigerant side outlet of the evaporator, and all the sensors are connected with the acquisition device through signal lines, so that the acquisition system is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122639860.8U CN216285024U (en) | 2021-11-01 | 2021-11-01 | Evaporative condenser performance test system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122639860.8U CN216285024U (en) | 2021-11-01 | 2021-11-01 | Evaporative condenser performance test system |
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| Publication Number | Publication Date |
|---|---|
| CN216285024U true CN216285024U (en) | 2022-04-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122639860.8U Active CN216285024U (en) | 2021-11-01 | 2021-11-01 | Evaporative condenser performance test system |
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| Country | Link |
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| CN (1) | CN216285024U (en) |
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2021
- 2021-11-01 CN CN202122639860.8U patent/CN216285024U/en active Active
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