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research-article

Phase Change Heat Transfer Measurements using Temperature Sensitive Paints

[+] Author and Article Information
Husain Al Hashimi

University of Maryland, College Park, Department of Mechanical Engineering, College Park, MD 20742
halhashimi88@gmail.com

Caleb F Hammer

University of Maryland, College Park, Department of Mechanical Engineering, College Park, MD 20742
chammer7@terpmail.umd.edu

Michel Lebon

University of Maryland, College Park, Department of Mechanical Engineering, College Park, MD 20742
michel.lebon01@gmail.com

Dan Zhang

School of Energy & Power Engineering, Xi’an Jiatong University, NO. 28 Xianning West Rd., Xi’an, Shaanxi, 710049, P.R. China
zhangdan@mail.xjtu.edu.cn

Jungho Kim

ASME Fellow, University of Maryland, College Park, Department of Mechanical Engineering, College Park, MD 20742
kimjh@umd.edu

1Corresponding author.

ASME doi:10.1115/1.4038135 History: Received June 10, 2017; Revised August 05, 2017

Abstract

Techniques based on temperature sensitive paints to measure time resolved temperature and heat transfer distributions at the interface between a wall and fluid during pool and flow boiling are described. The paints are excited using UV LEDs, and changes in fluorescence intensity are used to infer local temperature differences across a thin insulator from which heat flux distribution is obtained. Advantages over infrared thermometry include the ability to use substrates that are opaque to IR (e.g., glass, plexiglass, plastic films), use of low-cost optical cameras, no self-emission from substrates to complicate data interpretation, high speed, and high spatial resolution. TSP based methods to measure wall heat transfer distributions are validated, then demonstrated for pool and flow boiling.

Copyright (c) 2017 by ASME
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