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research-article

Enhanced subcooled flow boiling heat transfer in microchannel with Piranha Pin Fin

[+] Author and Article Information
Xiangfei Yu

Mechanical, Aerospace, and Nuclear Engineering Department, Rensselaer Polytechnic Institute 110 8th St, Troy, NY, USA
yux2@rpi.edu

Corey Woodcock

Mechanical, Aerospace, and Nuclear Engineering Department, Rensselaer Polytechnic Institute 110 8th St, Troy, NY, USA
woodcc@rpi.edu

Yingying Wang

Department of Mechanical and Aerospace Engineering, University of Central Florida 4000 Central Florida Blvd, Orlando, FL, USA
Yingying.Wang@ucf.edu

Joel L. Plawsky

Chemical Engineering Department, Rensselaer Polytechnic Institute 110 8th St, Troy, NY, USA
plawsky@rpi.edu

Yoav Peles

Department of Mechanical and Aerospace Engineering, University of Central Florida 4000 Central Florida Blvd, Orlando, FL, USA
Yoav.Peles@ucf.edu

1Corresponding author.

ASME doi:10.1115/1.4036683 History: Received October 14, 2016; Revised February 13, 2017

Abstract

An experimental study on subcooled flow boiling with engineering fluid HFE-7000 in a microchannel fitted with Piranha Pin Fins (PPFs) is presented. Heat fluxes of up to 735 W/cm2 were achieved and mass fluxes ranged from 618 kg/m2s to 2569 kg/m2s. It was found that flow boiling heat transfer was significantly enhanced with PPFs. The heat transfer coefficient with flow boiling was double the corresponding single-phase flow. Correlations for two-phase heat transfer coefficient and pressure drop in the nucleate flow boiling regime were developed based on the boiling, Weber, and Jakob numbers. The onset of nucleate boiling (ONB) and the critical heat flux (CHF) conditions were determined through visualization and was typically initiated from the last row of fins where temperatures were highest and flow rates lowest.

Copyright (c) 2017 by ASME
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