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Designs 2018, 2(2), 11; https://doi.org/10.3390/designs2020011

Design Optimization of Polymer Heat Exchanger for Automated Household-Scale Solar Water Pasteurizer

1
Tennessee State University, Civil and Architectural Engineering, 3500 John A Merritt Boulevard, Nashville, TN 37209, USA
2
Alliance to Feed the Earth in Disasters (ALLFED), Nashville, TN 37209, USA
3
Department of Electronics and Nanoengineering, School of Electrical Engineering, Aalto University, Espoo 02150, Finland
4
Department of Materials Science & Engineering and Department of Electrical & Computer Engineering, Michigan Technological University, Houghton, MI 49931, USA
*
Author to whom correspondence should be addressed.
Received: 23 March 2018 / Revised: 16 April 2018 / Accepted: 18 April 2018 / Published: 21 April 2018
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Abstract

A promising approach to reducing the >870,000 deaths/year globally from unsafe water is flow-through solar water pasteurization systems (SWPs). Unfortunately, demonstrated systems have high capital costs, which limits access for the poor. The most expensive component of such systems is the heat exchanger (HX). Thus, this study focuses on cost optimization of HX designs for flow-through SWPs using high-effectiveness polymer microchannel HXs. The theoretical foundation for the cost optimization of a polymer microchannel HX is provided, and outputs are plotted in order to provide guidelines for designers to perform HX optimizations. These plots are used in two case studies: (1) substitution of a coiled copper HX with polymer microchannel HX, and (2) design of a polymer microchannel HX for a 3-D printed collector that can fit in an arbitrary build volume. The results show that substitution of the polymer expanded HX reduced the overall expenditure for the system by a factor 50, which aids in making the system more economical. For the second case study, the results show how future system designers can optimize an HX for an arbitrary SWP geometry. The approach of distributed manufacturing using laser welding appears promising for HX for SWP. View Full-Text
Keywords: distributed manufacturing; heat exchanger; laser welding; microchannel; open hardware; optimization; solar energy; solar thermal; solar water pasteurization; water pasteurization distributed manufacturing; heat exchanger; laser welding; microchannel; open hardware; optimization; solar energy; solar thermal; solar water pasteurization; water pasteurization
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Denkenberger, D.C.; Pearce, J.M. Design Optimization of Polymer Heat Exchanger for Automated Household-Scale Solar Water Pasteurizer. Designs 2018, 2, 11.

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