Tube refrigerant oil-bearing evaporation/condensation heat transfer testing integrated device and test method thereof

Abstract

The invention relates to a tube refrigerant oil-bearing evaporation / condensation heat transfer testing integrated device and a test method thereof. The device is characterized by comprising a refrigerant loop, a lubricating oil injection loop and an evaporation / condensation test section heat transfer loop, wherein the refrigerant loop is formed by sequentially connecting a condenser, a recycling tank, a power pump, a regulation valve, a refrigerant mass flow meter, a uniform mediating tank, an evaporation preheating / condensation preheating parallel selection channel, an evaporation / condensation test section, a heater, a high efficiency oil separator and another condenser through pipelines; the lubricating oil injection loop is formed by sequentially connecting a high efficiency oil separator, an oil storage device, a high pressure oil pump, a lubricating oil mass flow meter, a control valve, a uniform mediating tank, an evaporation preheating / condensation preheating parallel selection channel, a refrigerant evaporation / condensation test section, a heater and another high efficiency oil separator through pipelines; and the evaporation / condensation test section heat transfer loop is formed by sequentially connecting a heat exchanger, a water heater, a water pump and a water mass flow meter through pipelines. The invention can carry out tube evaporation / condensation heat transfer testing on different refrigerants and the testing of the influence on the evaporation and condensation heat transfer characteristics of a heat exchange tube and is convenient and reliable.

Description

technical field [0001] The invention relates to an integrated device for testing refrigerant oil-containing evaporation / condensation heat transfer in a tube and a testing method thereof. Background technique [0002] Heat exchangers play a pivotal role in the field of refrigeration and air conditioning technology, so it is very important to study the evaporative condensation heat transfer characteristics of heat exchangers, including the influence of refrigerant oil on the evaporative condensation heat transfer characteristics of heat exchange tubes, because for vapor compression In the refrigeration system, a certain amount of lubricating oil will inevitably be mixed in the refrigerant, and the oil in the refrigerant will affect the evaporation, condensation and heat transfer characteristics of the heat exchange tube. In the prior art, the vapor compression refrigeration system is usually used to conduct research on the heat transfer characteristics of evaporation and conde...

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Problems solved by technology

This method has shortcomings: in theory, different refrigerants need to be equipped with different compressors, and when testing the evaporation and condensation heat transfer characteristics of various refrigerants, multiple compressors need to be equipped, which wastes money and takes up space; When testing the heat transfer characteristics of evaporation and condensation in a small diameter pipe, it is difficult to match the corresponding compressor due to the small flow rate of the small pipe diameter, and it is a waste of resources to choose a compressor with a large power

When testing the effect of refrigerant oil content on the heat transfer characteristics of heat exchange tube evaporation or condensation, it is necessary to add lubricating oil to the refrigerant evaporation or condensation test circuit. There are certain defects in this method: manual discontinuous oil injection, the oil content of the refrigerant cannot be continuously adjusted; it takes a certain amount of time to mix the refrigerant and the lubricating oil, and this method does not provide the driving force to accelerate the two. Mixing, the lubricating oil in the system takes a long time to reach a stable concentration

There are also online continuous oiling devices in the prior art, such as Chinese Patent No.: 200410017184.9, the title of the invention is "on-line continuous oiling device for refrigerant flow boiling heat transfer measurement circuit", but this device can only perform refrigerant flow boiling heat transfer measurement circuit On-line continuous oil injection test, unable to test the effect of refrigerant oil content on the condensation heat transfer characteristics of the heat exchanger

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