CN216285024U - Evaporative condenser performance test system - Google Patents

Abstract

The utility model discloses a performance testing method and system for an evaporative condenser. The testing system is mainly composed of the following parts: a testing 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, and the maintenance structure is insulated and moisture-proof, and there is a drainage system inside. Through this method, the heat transfer performance of the evaporative condenser can be tested under different environmental conditions, and its heat transfer performance under different working conditions can be tested, which has important guiding significance for engineering design selection. The recovery system recovers the heat of the room and the cooling capacity of the main refrigeration system. It is not necessary to set up a large-capacity cooling system for the test room to maintain its working conditions, which can greatly reduce the construction cost and operating cost of the laboratory.

Description

An evaporative condenser performance test system

technical field

The utility model relates to the field of performance experiments of refrigeration and heat exchangers, in particular to a performance testing system of an evaporative condenser.

Background technique

Due to the large energy consumption of refrigeration systems in industrial refrigeration and food cold chain industries, which is contrary to the national policy of energy conservation and emission reduction and the "two-carbon" goal, the heat dissipation effect of the condenser of the refrigeration system is directly related to the energy consumption of the refrigeration system. Research shows that, For every 1°C increase in the condensing temperature of the refrigeration system, the energy consumption of the refrigeration system will increase by 3%-4%. Evaporative condensers are generally used in condensers in this industry, and the heat exchange process of evaporative condensers involves complex heat and mass transfer processes, which are difficult to calculate accurately. With the amplification factor, the equipment selection capacity is too large or the capacity is insufficient, resulting in waste of materials, rising costs and a series of engineering problems. Moreover, this equipment often has a large capacity, and its heat exchange performance is closely related to the ambient temperature and humidity conditions, and the industry standard does not give an accurate test plan, and domestic manufacturers rarely have laboratories for evaporative condensers. , so the parameters of domestic manufacturers refer to the parameters of foreign manufacturers, resulting in inaccurate sample data, so the industry selection is also confusing. Moreover, the disadvantage of the evaporative condenser is that with the evaporation of water, the ion concentration of the circulating water will increase, which will form fouling on the wall of the heat pipe and the packing. larger, which brings inconvenience to engineering design.

SUMMARY OF THE INVENTION

Based on the above reasons, an evaporative condenser performance testing system is invented to provide a method for conducting experiments on the heat transfer performance of evaporative condensers under different environmental conditions. The specific technical scheme is as follows.

The test system is mainly composed of the following parts, the test room, the main refrigeration system, the auxiliary air conditioning system, the room heat recovery system, the acquisition system and the control system. The test room is a closed space, and the maintenance structure is treated with thermal insulation and moisture-proof, and there is a drainage system inside.

The main refrigeration system consists of a compressor, a tested prototype (evaporative condenser), a liquid accumulator, a solenoid valve, a throttle valve, a gas-liquid separator, an evaporator, and pipes and instruments. Provides constant heat to dissipate into the test room environment through an evaporative condenser.

The auxiliary air-conditioning system is composed of auxiliary condensing unit, auxiliary air-conditioning box and valve pipeline. The auxiliary air-conditioning box is equipped with auxiliary evaporator, auxiliary electric heater and fan 1. The main function is to assist in maintaining stable and fast adjustment of the environmental conditions of the test room. Test the ambient conditions inside the room.

The room heat recovery system is composed of a heat recovery surface cooler, a second fan, a refrigerant pump 1, a refrigerant pump 2, a refrigerant tank, and corresponding valves and instruments. Its main function is to recover the cooling capacity of the main refrigeration system. Inside the test room, balance the heat dissipation of the main cooling system to the test room, so as to ensure that the dry and wet bulb temperature of the tested room is constant within an acceptable range (main wet bulb temperature), and it is not necessary to set up a large-capacity cold source, thereby reducing the construction cost. cost and operating energy consumption, while the heat recovery system is responsible for the heat source of the main refrigeration system, and there is no need to set up another heat source to reduce power consumption. The refrigerant includes any of the following working fluids: water, salt solution, ethylene glycol and other organic Alcohol solution or other new refrigerant solution.

The acquisition system mainly includes the following components, in the main refrigeration system: exhaust temperature sensor T1, evaporative cooling liquid temperature sensor T2, return air temperature sensor T3, high pressure pressure sensor P1, low pressure pressure sensor P2, in the test room: intake air dry and wet Ball temperature sensor TR1, outlet air temperature and humidity sensor TR2, cooling water temperature sensor T6, make-up water temperature sensor T7, in the heat recovery system: refrigerant temperature sensors T4 and T5 entering and leaving the evaporator, refrigerant flow meter and collection device .

The control system is mainly composed of control cabinet, PLC, touch screen and related electrical components.

Compared with the prior art, the beneficial effects of the present invention are as follows.

1. In the present invention, the evaporative condenser is placed in an airtight test room, and its ambient temperature and humidity can be adjusted arbitrarily, to test its heat transfer performance under different working conditions, to test relatively accurate data, and to select models for engineering design. has important guiding significance.

2. The utility model adopts the heat recovery system to recover the heat of the room and the cooling capacity of the main refrigeration system, and it is not necessary to set up a large-capacity cooling system for the test room to maintain its working condition, which can greatly reduce the construction cost and operating cost of the laboratory.

3. The utility model can use a variety of methods to test the exhaust heat of the evaporative condenser (air side enthalpy difference method, refrigerant side enthalpy difference method, refrigerant side enthalpy difference method, etc.), and calculate and heat transfer coefficient to ensure The data is more scientific and accurate.

Description of drawings

Fig. 1 is the experimental principle diagram of the present utility model.

In the figure: 1 is compressor, 2 is evaporative condenser, 3 is liquid accumulator, 4 is filter drier, 5 is solenoid valve, 6 is throttle valve, 7 is evaporator, 8 is high and low pressure controller, 9 is the auxiliary condensing unit, 10 is the auxiliary air-conditioning box, 11 is the auxiliary evaporator, 12 is the auxiliary electric heater, 13 is the first fan, 14 is the second fan, 15 is the heat recovery surface cooler, 16 is the test room, and 17 is the Ball valve five, 18 is refrigerant pump two, 19 is filter two, 20 is ball valve four, 21 is ball valve six, 22 is refrigerant tank, 23 is ball valve three, 24 is ball valve one, 25 is filter one, 26 is the flow meter, 27 is the first refrigerant pump, and 28 is the second ball valve.

Detailed ways

The utility model relates to a performance testing system for an evaporative condenser, the specific implementation of which is as follows.

The exhaust port of the compressor 1 is connected to the air inlet of the heat exchange pipe of the evaporative condenser 2, and the liquid outlet pipe of the heat exchange pipe of the evaporative condenser 2 is connected to the inlet of the accumulator 3. , the outlet of the accumulator 3 is connected to the inlet of the filter drier 4, the outlet of the filter drier 4 is connected to the inlet of the solenoid valve 5, and the outlet of the solenoid valve 5 is connected to the inlet of the throttle valve 6 The outlet of the throttle valve 6 is connected to the refrigerant side inlet of the evaporator 7, the refrigerant side outlet of the evaporator 7 is connected to the inlet of the compressor 1, and the high and low pressure controller 8 The high-pressure end and the low-pressure end are respectively connected with the discharge pipe and the suction pipe of the compressor 1, thereby constituting the main refrigeration system.

The liquid supply pipe of the auxiliary condensing unit 9 is connected to the inlet of the auxiliary evaporator 11, the outlet of the auxiliary evaporator 11 is connected to the suction port of the auxiliary condensing unit 9, the auxiliary evaporator 11, the auxiliary The heater 12 and the first fan 13 are integrated in the auxiliary air conditioning box 10 to constitute the auxiliary air conditioning system.

The refrigerant carrier tank 22 has four ports, the second port of the refrigerant carrier tank 22 is connected to the inlet of the ball valve 1 24, the outlet of the ball valve 1 24 is connected to the inlet of the filter 1 25, and the The outlet of filter one 25 is connected to the inlet of the first refrigerant pump 27, the outlet of the first refrigerant pump 27 is connected to the inlet of the second ball valve 28, and the outlet of the second ball valve 28 is connected to the evaporator 7 carrier. The refrigerant side inlet is connected, the refrigerant side outlet of the evaporator 7 is connected with the inlet of the flow meter 26, the outlet of the flow meter 26 is connected with the inlet of the ball valve 3 23, and the outlet of the ball valve 3 23 is connected with the inlet of the flow meter 26. The first interface of the coolant tank 22 is connected to form a coolant cooling system; the interface four of the coolant tank 22 is connected to the inlet of the ball valve 420, and the outlet of the ball valve 420 is connected to the filter The inlet of the second filter 19 is connected, the outlet of the filter 2 19 is connected with the inlet of the second refrigerant pump 18, the outlet of the second refrigerant pump 18 is connected with the inlet of the ball valve 5 17, and the ball valve 5 The outlet of 17 is connected to the inlet of the refrigerant side of the heat recovery surface cooler 15, the outlet of the refrigerant of the heat recovery surface cooler 15 is connected to the inlet of the ball valve 6 21, and the outlet of the ball valve 6 21 is connected to the The three-phase connection of the refrigerant tank 22 interfaces constitutes a refrigerant heating system; the refrigerant cooling system and the refrigerant heating system constitute the room heat recovery system.

In the main refrigeration system: the exhaust gas temperature sensor T1 is installed on the refrigerant side inlet of the evaporative condenser, and the evaporative condenser outlet temperature sensor T2 and the high pressure pressure sensor P1 are installed on the evaporative condenser. In the test room: the inlet air dry and wet bulb temperature sensor TR1 is installed at the outlet of the evaporative refrigerant side. The air inlet of the evaporative condenser, the air outlet temperature and humidity sensor TR2 are installed in 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 replenishment water temperature sensor T7 is installed on the water supply pipe of the evaporative condenser; in the room heat recovery system: the temperature sensors T4 and T5 of the refrigerant entering and leaving the evaporator are respectively installed at the inlet and outlet of the refrigerant side of the evaporator, The refrigerant flow meter is installed at the refrigerant side outlet of the evaporator, and all the above sensors are connected with the collection device through signal lines, thereby forming the collection system.

The above-described embodiments are only for illustrating the technical conception and characteristics of the present utility model, and its purpose is to enable those who are familiar with the art to understand the content of the present invention and implement it accordingly, and cannot limit the scope of the present invention with this. Equivalent changes and modifications made in the spirit of the invention should all be included within the protection 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.

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