This paper describes the results of enhancement in heat transfer with a two-phase flow of refrigerant 22 under evaporating conditions. In order to enhance the heat transfer, two kinds of tube were tested: a tube with a microporous internal surface, which was made by fixing copper particles on a smooth copper surface by plating with copper, and a smooth-inner-surface tube into which a microporous, thin plate fin was inserted.
The experimental results show that the heat-transfer coefficient of the microporous tube is 7.5 times as large as that of a smooth tube, and the heat-transfer coefficient of the microporous finned tube is from 1.65 to 1.85 times as large as that of a smooth finned tube for incomplete evaporation.
Citation: ASHRAE Transactions, 1984, vol. 90, pt. 1A, Atlanta, GA
Product Details
- Published:
- 1984
- Number of Pages:
- 16
- File Size:
- 1 file , 1.2 MB
- Product Code(s):
- D-AT-2815
