Design of a high temperature refrigerant condensing heat exchange test bed

Presents in a systematic way the design method of the test bed which consists of a natural circulation loop of high temperature refrigerant, a forced circulation loop of cooling water and a computer monitoring and control subsystem. There are several important issues to that attention should be paid in the design of test bed, such as the measurement of the temperature difference between the inlet and outlet of test section and the temperature of cooling water in the inlet and outlet of condensing tubes, filled volume of the steam boiler and its level control, the determination of the natural acting head of high temperature tank and design of the cooling water flow of measuring tank. Concludes that the relative uncertainty of the whole bed and the internal and the external tube condensing heat transfer coefficients are ±7.19％, ±4.95％, and ±8.73％ respectively.