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ISSN Online: 2379-1748

ISBN Flash Drive: 978-1-56700-469-4

ISBN Online: 978-1-56700-470-0

Second Thermal and Fluids Engineering Conference
April, 2-5, 2017, Las Vegas, NV, USA

Pool boiling heat transfer of R134a outside enhanced tubes at higher heat flux

Get access (open in a dialog) pages 2911-2944
DOI: 10.1615/TFEC2017.mst.018541

Abstract

An experimental investigation on heat transfer performance of enhanced tubes is conducted with refrigerant R134a. The heat flux is from 10,000 to 370,000 W/m2.The heat transfer is substantially enhanced at the heat flux less than 200 kWm2. An increase of heat transfer coefficient up to 330% above the plain tube is observed. However, at the heat flux higher than 200 kWm2, it is found that the heat transfer coefficient of enhanced tubes is even lower than the plain tube. The same features are also observed for other enhanced tubes in the literatures.