HEAT TRANSFER AND PRESSURE LOSS IN TUBE BUNDLES FOR HIGH PERFORMANCE HEAT EXCHANGERS AND FUEL ELEMENTS
- 12 August 1952
- report
- Published by Office of Scientific and Technical Information (OSTI)
Abstract
A promising type of construction for both heat exchangers and fuel elements involves parallel flcw through bundles of closely-spaced tubes. This report discusses problems encountered in spacing long slender tubes and in handling the cross-flow regions at the ends. A series of model tests, planned to give the more important pressuredrop and heat-transfer information required for ANP design work, are reported. Two heat-exchanger models and three ARE-type fuel- element bundles were flow-tested with water and air, and the heat-transfer characteristics of one heat-exchanger model were determined with NaK. Appendixes include the following: cooling effectiveness and overall heat-transfer coefficient; friction factor and Reynolds' number for air-flow and water-flow tests; correlation of flow through individual tubes with tube length and diameter; and metallographic examination of heat exchanger after 3000 hr operation in NaK. (L.T.W.)Keywords
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