WIT Press


An Investigation Into The Influence Of Micro Structures On Nucleate Boiling Processes

Price

Free (open access)

Paper DOI

10.2495/HT140061

Volume

83

Pages

12

Page Range

61 - 72

Published

2014

Size

2,117 kb

Author(s)

A. Schubert, M. Zinecker, M. Hackert-Oschätzchen, M. Lausberg & A. Schulz

Abstract

From the prior art it is known that a selective modification of heat transfer surfaces may lead to an improvement of heat transfer rates. For evaporation processes, often the heat transfer surfaces are roughened, coated with porous material or structured by electro-deposition. In this study micro structures are investigated to increase the heat transfer coefficient for heat transfer by nucleate boiling. Applying micro milling and sand-blasting, different micro structures are machined in aluminum plates. A specially developed test bench is used for measuring the heat transfer coefficients for different heat fluxes. The experimental setup and the experimental procedure are described in this paper. By comparing the measurement results it is analyzed as to which structures are most appropriate for heat transfer by nucleate boiling. Keywords: nucleate boiling, heat transfer, micro structures, micro manufacturing technologies, experimental verification.

Keywords

nucleate boiling, heat transfer, micro structures, micro manufacturing technologies, experimental verification.