An air-cooled compression condensing unit performance test system

Abstract

The invention discloses a testing system for performance of an air-cooled compression condensing unit, and belongs to the technical field of building environment and equipment engineering. The testing system comprises an air circulation processing system, a refrigerant circulating system and an energy balancing and metering system, wherein the air circulation processing system comprises a testing environment room, a fan, an air processing unit and a compression condensing unit matched therewith, and an air sampling device; high-temperature high-pressure refrigerant liquid from the compression condensing unit to be tested is throttled into a gas-liquid diphasic fluid by a throttle valve, enters an evaporation coil in a calorimeter instrument, and is heated by a second refrigerant into overheat steam to return to the compression condensing unit to be tested, so that the whole refrigeration circulation is completed; and secondary refrigerants in a surface cooling coil in the air processing unit in a centrifugal pump and a heating coil in the calorimeter instrument forms a secondary refrigerant circulation by a centrifugal pump. The system can realize energy self-balance, reduce running energy consumption and accurately test performance parameters, such as refrigerating capacity, of the air-cooled compression condensing unit.

Description

technical field [0001] The invention relates to a performance test system of an air-cooled compression condensing unit, which is used for measuring performance parameters such as the cooling capacity of the air-cooled compression condensing unit, and belongs to the technical field of building environment and equipment engineering. Background technique [0002] The "Second Refrigerant Quantity Heater Method" is a representative test method for performance testing of air-cooled compression condensing units in the national standard GB / T 21363-2008 "Positive displacement refrigeration compression condensing units". attached figure 1 It is a schematic diagram of the structure of the air-cooled compression condensing unit performance test system in the above-mentioned national standard. On the one hand, the air-cooled compression condensing unit discharges heat to the environment; on the other hand, the refrigerant gas discharged from the air-cooled compression condensing unit en...

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Problems solved by technology

Therefore, even if the separated heat pipe can transfer heat from the high temperature section to the low temperature section well, the heat balance in the calorimeter cannot be achieved, and the temperature of the calorimeter will become higher and higher.

Furthermore, the heat transfer heat of the heat pipe used to heat the second refrigerant cannot be accurately measured, so the refrigerant mass flow rate of the air-cooled compression condensing unit cannot be accurately measured, and the cooling capacity of the air-cooled compression condensing unit cannot be obtained.

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