UNSPECIFIED (1998) A study of local heat transfer coefficients in plate fin-tube heat exchangers using the steady state and transient liquid crystal techniques. In: International Conference on Optical Methods and Data Processing in Heat and Fluid Flow, APR 16-17, 1998, CITY UNIV LONDON, LONDON, ENGLAND.

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Abstract

Optical methods for measuring local heat transfer coefficients using thermochromic liquid crystals are discussed. Two techniques using radiative steady state and transient heating have been used to measure local heat transfer on the fin of a plate fin-tube heat exchanger. The transient method does not give results consistent with the steady state method when the heat transfer coefficients are based on fluid inlet temperature. It is suggested that the steady state method is preferable since it yields numerical values that are closer to those based on local temperature and hence easier to interpret when observing the effects of changing the local surface geometry.

Item Type:	Conference Item (UNSPECIFIED)
Subjects:	T Technology > TP Chemical technology T Technology > TJ Mechanical engineering and machinery Q Science > QC Physics
Series Name:	IMECHE CONFERENCE TRANSACTIONS
Journal or Publication Title:	INTERNATIONAL CONFERENCE ON OPTICAL METHODS AND DATA PROCESSING IN HEAT AND FLUID FLOW
Publisher:	PROFESSIONAL ENGINEERING PUBLISHING LTD
ISBN:	1-86058-142-0
ISSN:	1356-1448
Date:	1998
Volume:	1998
Number:	2
Number of Pages:	10
Page Range:	pp. 201-210
Publication Status:	Published
Title of Event:	International Conference on Optical Methods and Data Processing in Heat and Fluid Flow
Location of Event:	CITY UNIV LONDON, LONDON, ENGLAND
Date(s) of Event:	APR 16-17, 1998
URI:	http://wrap.warwick.ac.uk/id/eprint/15070

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