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Melting and solidification of PCM and PCM-expanded graphite composite using toroidal tube heat exchanges

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Title: Melting and solidification of PCM and PCM-expanded graphite composite using toroidal tube heat exchanges
Author: Patel, Sunnykumar
Department: School of Engineering
Program: Engineering
Advisor: Tasnim, Syeda
Abstract: In the current study, melting and solidification of phase change materials (PCMs) with added expanded graphite (EG) are studied for two novel toroidal tube heat exchanger geometries. COMSOL Multiphysics® is used for numerical simulation, and in total, 118 cases have been investigated. The thermal performance is evaluated in terms of (i) melt/solid fraction, (ii) energy stored/released by PCM/CPCM, (iii) average PCM/CPCM temperature, and (iv) heat flux. The effects of heat exchanger geometric parameters such as tube turn (n), pitch controller (m), tube layers, type of PCMs, and fin configurations on mentioned parameters are studied. Result suggests that using PCM impregnated EG in the single-layer toroidal tube geometry, (i) reduces melting time by 97.42%, (ii) increases the energy storage rate by 1944.25%, and (iii) reduces the thermal equilibrium time by 97.70%. The use of multiple PCM in the toroidal tube heat exchanger can be evaluated in the future.
URI: https://hdl.handle.net/10214/25738
Date: 2021-05-10
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Embargoed Until: 2022-05-10


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