ROUGHENING OF HEAT TRANSFER SURFACES AS A METHOD OF INCREASING THE HEAT FLUX AT BURNOUT. Progress Report No. 1
The heat flux at burnout for rough surfaces that are cooled by forced flow of water in annuli was shown experimentally to be at least 50 to 100% greater than for smooth surfaces at the same coolant velocity, temperature, and pressure. By roughening the heat transfer surface of a fuel assembly and by increasing the size of the coolant passages, a net gain of as much as 80% in heat flux at burnout may be realized without increasing the power required to pump the coolant through the assembly. The tests were conducted with electrically heated tubes that were cooled by forced convection boiling of water in annali surrounding the tubes. The tubes were roughened with knurls or threads to a depth of 0.005 to 0.013 in. (auth)
- Research Organization:
- Du Pont de Nemours (E.I.) & Co. Savannah River Lab., Aiken, S.C.
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-14-002520
- OSTI ID:
- 4230655
- Report Number(s):
- DP-380
- Country of Publication:
- United States
- Language:
- English
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