High-precision heat exchange single-tube performance test device under all working conditions

Abstract

The invention discloses an all-condition high-precision heat exchange single tube performance testing apparatus, comprising a barrel. A first line and a second line are disposed inside the barrel, and a cooling and heating medium unit and a testing unit are disposed outside the barrel and are connected with water inlets of the first and second lines through two parallel pipe segments with a valve; a water outlet of the first line is connected with a first circulating line, and the first circulation line is connected respectively with a water return end of the cooling and heating medium unit and a water return end of the testing unit through two parallel pipe segments with a valve; a water outlet of the second line is connected with a second circulation line, and the second circulation line is connected respectively with the water return end of the cooling and heating medium unit and the water return end of the testing unit through two parallel pipe segments with a valve. The apparatus is simple in structure, low in cost and capable of running stably and can simulate more complete test conditions; meanwhile, the test precision is greatly improved when compared with that of a traditional apparatus, and the accuracy and reliability of the testing apparatus are ensured.

Description

technical field [0001] The invention belongs to the field of thermal test equipment, in particular to a high-precision heat exchange single-tube performance test device under all working conditions. Background technique [0002] With the development of the economy, people pay more and more attention to the comfort of the living environment, and the use of refrigeration and air conditioning is becoming more and more extensive. While vigorously developing the air-conditioning industry to obtain economic benefits, our country is also facing a huge consumption of energy. According to statistics, the power consumption of indoor air-conditioning alone exceeds 100 billion kWh every year, and the power consumption of cooling and air-conditioning in summer accounts for about 30% of the total power consumption of the society. How to alleviate the power shortage caused by the huge energy consumption of refrigeration and air conditioning has become the focus of attention. In the air c...

AI Technical Summary

Problems solved by technology

The connection between the two cylinders is connected by a connecting pipe as large as possible, which is used for the circulation of the refrigerant, but: ① There is more refrigerant circulation at the nozzle of the connecting pipe of the two cylinders, and the other between the cylinders is not at the connection nozzle In the place where the refrigerant is located, the circulation of the refrigerant will be less, which will cause uneven heat transfer and unrealistic simulation of the working conditions; Work efficiency increases labor costs; ③There are many processing surfaces in the container, which will increase the possibility of more refrigerant leakage points and increase the workload of daily maintenance; ④The traditional cylinder is a closed container, and the internal refrigerant is always theoretically Saturation state, so it can only simulate the heat transfer situation in saturation state, which limits the range of working conditions of the test performance test; ⑤The traditional cylinder has a large volume, which causes more heat leakage, so the accuracy of the test is relatively Difficult to guarantee

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