CO2 compressor-expander performance testing system

Abstract

The invention discloses a test system for testing the property of carbon dioxide compressor-expander, belonging to the refrigerating technique. Wherein, the outlet of evaporator is connected to the inlet of gas-liquid separator; the outer part of cooling fan is fixed on the front surface of middle cooler; the middle cooler and oil separator are connected to the tested compressor; the inlet of gas cooler is connected to the outlet of coolant of oil separator; the outlet of gas cooler is connected to the inlet of quality flow meter and the inlet of electric expand valve; the outlet of quality flow meter is connected to the inlet of expand valve; the outlet of expand valve is connected to the inlet of tested expander; the outlet of evaporator is connected to the inlet of gas-liquid separator; the outlet of gas-liquid separator is connected to the inlet of electric heater; the outlet of electric heater is connected to the first-stage gas inlet of tested compressor. The invention has simple structure, lower cost, and flexible operation, which can be used to test the property of full-closed carbon dioxide compressor-expander.

Description

technical field [0001] The invention relates to a system in the technical field of refrigeration, in particular to a carbon dioxide compressor-expander performance testing system. Background technique [0002] At present, the research on carbon dioxide as an alternative refrigerant is one of the most active research directions in the field of refrigeration technology. Especially in the application fields of automotive air conditioner (MAC), environmental control unit (ECU) and heat pump water heater (HPWP), the application of carbon dioxide has attracted the attention of the industry and has increasingly shown its unique advantages. Among them, as the "heart" part of the refrigeration system, the development and development of the carbon dioxide compressor is very important, and its performance directly affects the overall performance and stability of the carbon dioxide system. On the other hand, considering the large throttling loss of the carbon dioxide system, the recove...

AI Technical Summary

Problems solved by technology

Its disadvantages are: since the performance testing mechanism is based on the principle of hot gas bypass, the control of the suction and exhaust pressure is realized through the regulating valve, and the control is complicated

During the test of the two-stage CO2 compressor, without intercooling, it is impossible to control the inlet temperature of the two stages of the compressor

The high-pressure refrigerant discharged from the compressor is first throttled and decompressed to an intermediate pressure value, and the performance test of the carbon dioxide expander cannot be performed on the same test bench

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