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Article

Evaluation and Improvement of PCM Melting in Double Tube Heat Exchangers Using Different Combinations of Nanoparticles and PCM (The Case of Renewable Energy Systems)

1
Department of Mechanics of Biosystem Engineering, Sari Agricultural Sciences and Natural Resources University, Sari 48181-66996, Iran
2
Department of Mechanics of Biosystems Engineering, Tarbiat Modares University, Tehran 14115-111, Iran
3
Department of Energy and Refrigerating Air-Conditioning Engineering, National Taipei University of Technology, Taipei 10608, Taiwan
*
Author to whom correspondence should be addressed.
Academic Editor: Alessandro Franco
Sustainability 2021, 13(19), 10675; https://doi.org/10.3390/su131910675
Received: 21 August 2021 / Revised: 10 September 2021 / Accepted: 20 September 2021 / Published: 26 September 2021
In this work, the melting process of phase change material (PCM) in double tube heat exchangers was investigated and evaluated through the use of different combinations (1, 2, 3% Nano-Enhanced PCM and 1, 3, 5% Nano-HTF) of GQD, as well as SWCNT nanoparticles and PCM (RT82). In this study, the effect of three different methods, namely the dispersion of nanoparticles in PCM (nano-enhanced PCM), the dispersion of nanoparticles in HTF (nano-HTF), and the simultaneous dispersion of nanoparticles in PCM and HTF (nano-enhanced PCM, nano-HTF) concerning the nanoparticles participation in the thermal energy storage system in a double tube heat exchanger was evaluated. Other effective factors, such as the inlet fluid temperature, different Reynolds numbers, fin as well as new parameter of pipe, and fin thickness were also evaluated. The results showed that the highest effect of different parameters on the PCM melting process was related to the 1% nano-HTF and 3% nano-enhanced PCM nanoparticles of SWCNT, which decreased the PCM melting rate by about 39%. The evaluation of the effect of pipe and fan thickness also showed that the melting rate improved by 31% through reducing the thickness of the HTF fin and pipe. In general, the current study followed two purposes first, to examine three methods of the dispersion of nanoparticles in the thermal energy storage system; second, to reduce the thickness of the tube and fin. Findings of the study yielded positive results. View Full-Text
Keywords: melting; phase change material; double tube heat exchanger; nanoparticles; enhanced thermal energy melting; phase change material; double tube heat exchanger; nanoparticles; enhanced thermal energy
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MDPI and ACS Style

Motevali, A.; Hasandust Rostami, M.; Najafi, G.; Yan, W.-M. Evaluation and Improvement of PCM Melting in Double Tube Heat Exchangers Using Different Combinations of Nanoparticles and PCM (The Case of Renewable Energy Systems). Sustainability 2021, 13, 10675. https://doi.org/10.3390/su131910675

AMA Style

Motevali A, Hasandust Rostami M, Najafi G, Yan W-M. Evaluation and Improvement of PCM Melting in Double Tube Heat Exchangers Using Different Combinations of Nanoparticles and PCM (The Case of Renewable Energy Systems). Sustainability. 2021; 13(19):10675. https://doi.org/10.3390/su131910675

Chicago/Turabian Style

Motevali, Ali, Mohammadreza Hasandust Rostami, Gholamhassan Najafi, and Wei-Mon Yan. 2021. "Evaluation and Improvement of PCM Melting in Double Tube Heat Exchangers Using Different Combinations of Nanoparticles and PCM (The Case of Renewable Energy Systems)" Sustainability 13, no. 19: 10675. https://doi.org/10.3390/su131910675

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