Thermal stratification in stagnant branch lines due to leakage
Conference
·
OSTI ID:136765
Stagnant branches of piping attached to a main pipe of a higher temperature develop an exponential temperature distribution and associated thermal stresses. In the absence of leakage, the branch line can be treated as a closed extended surface for which a closed form analytical solution exists. This paper presents an analytical solution and practical graphs for cases where the thermal stratification is enhanced by leakage of fluid through leaky isolation valves. The non-dimensionalized presentation of the solution makes it applicable to a wide variety of practical problems. The solution is applicable to piping with or without insulation, and the leakage can be from a source at higher or lower temperature than the fluid in the branch line. The effect of mixing due to buoyancy on the temperature distribution is assumed to be negligible. This study is applicable to a reactor cooling system of a PWR.
- OSTI ID:
- 136765
- Report Number(s):
- CONF-950740--; ISBN 0-7918-1344-4
- Country of Publication:
- United States
- Language:
- English
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