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Title: ROUGHENING OF HEAT TRANSFER SURFACES AS A METHOD OF INCREASING THE HEAT FLUX AT BURNOUT. Progress Report No. 1

Abstract

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)

Authors:
;
Publication Date:
Research Org.:
Du Pont de Nemours (E.I.) & Co. Savannah River Lab., Aiken, S.C.
Sponsoring Org.:
USDOE
OSTI Identifier:
4230655
Report Number(s):
DP-380
NSA Number:
NSA-14-002520
DOE Contract Number:  
AT(07-2)-1
Resource Type:
Technical Report
Resource Relation:
Other Information: Orig. Receipt Date: 31-DEC-60
Country of Publication:
United States
Language:
English
Subject:
ENGINEERING AND EQUIPMENT; BOILING; BURNOUT; CONFIGURATION; CONVECTION; EFFICIENCY; ELECTRICITY; FINS; FORCED CONVECTION; FUEL ELEMENTS; HEAT FLOW; HEAT TRANSFER; HEATING; LIQUID FLOW; POWER; PRESSURE; PUMPS; ROUGHNESS; SURFACES; TEMPERATURE; TESTING; TUBES; VELOCITY; VOLUME; WATER COOLANT

Citation Formats

Durant, W.S., and Mirshak, S. ROUGHENING OF HEAT TRANSFER SURFACES AS A METHOD OF INCREASING THE HEAT FLUX AT BURNOUT. Progress Report No. 1. United States: N. p., 1959. Web. doi:10.2172/4230655.
Durant, W.S., & Mirshak, S. ROUGHENING OF HEAT TRANSFER SURFACES AS A METHOD OF INCREASING THE HEAT FLUX AT BURNOUT. Progress Report No. 1. United States. doi:10.2172/4230655.
Durant, W.S., and Mirshak, S. Wed . "ROUGHENING OF HEAT TRANSFER SURFACES AS A METHOD OF INCREASING THE HEAT FLUX AT BURNOUT. Progress Report No. 1". United States. doi:10.2172/4230655. https://www.osti.gov/servlets/purl/4230655.
@article{osti_4230655,
title = {ROUGHENING OF HEAT TRANSFER SURFACES AS A METHOD OF INCREASING THE HEAT FLUX AT BURNOUT. Progress Report No. 1},
author = {Durant, W.S. and Mirshak, S.},
abstractNote = {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)},
doi = {10.2172/4230655},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1959},
month = {7}
}