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Real-time Determination of Convective Heat Transfer Coefficient via Thermoelectric Modules

[+] Author and Article Information
Nataporn Korprasertsak

School of Manufacturing Systems and Mechanical Engineering, Sirindhorn International Institute of Technology, Thammasat University P.O. Box 22, Thammasat-Rangsit Post Office, Pathum Thani, 12121, Thailand
nataporn.korp@gmail.com

Thananchai Leephakpreeda

School of Manufacturing Systems and Mechanical Engineering, Sirindhorn International Institute of Technology, Thammasat University P.O. Box 22, Thammasat-Rangsit Post Office, Pathum Thani, 12121, Thailand
thanan@siit.tu.ac.th

1Corresponding author.

ASME doi:10.1115/1.4036734 History: Received January 13, 2017; Revised May 03, 2017

Abstract

In this paper, determination of convective heat transfer coefficient under actual convection processes is proposed by using thermoelectric modules. According to the Newton's law of cooling, the rate of heat flow through fluid is determined with the convective heat transfer coefficient, which is usually derived as a constant parameter from empirical correlations for a given flow condition. In fact, the convection heat transfer coefficient is a temperature-dependent parameter under variant operating conditions. Also, it strongly depends upon speed of fluid, which changes with respect to time. Analytical and experimental results show the effectiveness of the proposed thermoelectric modules in determining the convective heat transfer coefficient for air in real time implementation. The methodology can be generalized in further developing determination of convective heat transfer coefficients for other fluids.

Copyright (c) 2017 by ASME
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