ShareHeat transfer augmentation by inserts during condensation of refrigerant R-22 inside a horizontal tube.
Author(s) : SHRIVASTAVA R., KUMAR R., GUPTA A., et al.
Summary
In this paper, the enhancement in heat transfer has been studied for the forced-convection condensation of R-22 saturated vapour inside a tube in the presence of twisted tape inserts. The test condenser is constituted by four test sections connected in series. Each test-section has an inside diameter of 12.7 mm and the length of 950 mm. Three twisted tape inserts with the twist ratio of 15, 9 and 6 were put, one by one, in the test condenser. The insert with twist ratio of 6 gave the best performance and enhanced the average heat transfer coefficient by 25% as compared to the plain flow. The segmented tapes of best performing twist ratio of 6 were inserted one at a time in the test condenser. The length of segmented tape inserts was taken as 1/4, 1/2, and 3/4 of the total length of the test condenser. The refrigerant flow rate has been taken as 237 kg/s-m2.
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Details
- Original title: Heat transfer augmentation by inserts during condensation of refrigerant R-22 inside a horizontal tube.
- Record ID : 2007-1457
- Languages: English
- Source: 2006 Purdue Conferences. 18th International Compressor Engineering Conference at Purdue & 11th International Refrigeration and Air-Conditioning Conference at Purdue [CD-ROM].
- Publication date: 2006/07/17
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Indexing
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Themes:
HCFCs;
Heat transfer;
Mass transfer - Keywords: Refrigerating system; Horizontal tube; Enhancement; Tube; Heat transfer; R22; Expérimentation; Air conditioning; Condenser; Condensation; Heat exchanger; Additive
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