Frost formation as a temporary enhancer for quench pool boiling

Gedalia Mazor, Eli Korin, Dmitry Nemirovsky, Izhak Ladizhensky

Research output: Contribution to journalArticlepeer-review

17 Scopus citations

Abstract

Enhanced boiling conditions during quenching by use of frost as a temporary heat transfer enhancer were determined experimentally. The frost coating was obtained by the application of air moisture on the previously cooled surface of a product. We found that heat transfer intensity can be adjusted by the change in coating structure characteristics. These characteristics, on the other hand, depend on frost formation parameters such as a temperature of the preliminarily cooled sample, an air temperature, a relative humidity, an air movement velocity and a frost formation time range. During the subsequent sample quenching in liquid nitrogen, a heat exchange enhancement was 10.2-12.4 when cooling down to the nitrogen's saturation temperature. By limiting the cooling temperature within the range of 90 K-110 K, the additional heat exchange enhancement increased 1.4-1.5 times.

Original languageEnglish
Pages (from-to)345-352
Number of pages8
JournalApplied Thermal Engineering
Volume52
Issue number2
DOIs
StatePublished - 21 Jan 2013

Keywords

  • Coating
  • Enhancing
  • Frost
  • Heat transfer
  • Pool boiling
  • Quench

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Industrial and Manufacturing Engineering

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