Numerical study on energy and exergy performances of a microencapsulated phase change material slurry based photovoltaic/thermal module
Microencapsulated phase change material (MPCM) slurry has proven to have potential in elevating the overall performance of a photovoltaic/thermal (PV/T) module as a working fluid. In order to make full use of the superiority of MPCM slurry and further improve energy and exergy efficiencies of the PV...
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sg-ntu-dr.10356-1515332021-06-29T09:06:53Z Numerical study on energy and exergy performances of a microencapsulated phase change material slurry based photovoltaic/thermal module Yu, Qinghua Romagnoli, Alessandro Yang, Ren Xie, Danmei Liu, Chuanping Ding, Yulong Li, Yongliang School of Mechanical and Aerospace Engineering Engineering::Mechanical engineering Photovoltaic/Thermal Module Microencapsulated Phase Change Material Microencapsulated phase change material (MPCM) slurry has proven to have potential in elevating the overall performance of a photovoltaic/thermal (PV/T) module as a working fluid. In order to make full use of the superiority of MPCM slurry and further improve energy and exergy efficiencies of the PV/T module, the effects of MPCM concentration and melting temperature under a wide inlet fluid velocity range were explored based on a three-dimensional numerical model of coupled heat transfer in this study. The results show that both the energy and exergy efficiencies increased with the concentration. A lower melting temperature resulted in higher energy efficiency, whereas a higher melting temperature is helpful for exergy efficiency improvement. The slurry with an excessively low melting temperature (e.g. 27 °C) even led to lower exergy efficiency than pure water. The melting temperature needs to be precisely tailored to make a compromise between energy and exergy efficiencies. In comparison with pure water, the improvement in energy efficiency provided by the slurry was further enhanced at a lower inlet velocity, while the improvement in exergy efficiency was optimized by adjusting the inlet velocity to a certain value. The maximum improvement in energy efficiency provided by the slurry was 8.3%, whilst that in exergy efficiency was 3.23% in this work. From the above, the superiority of MPCM slurry can be further promoted by selecting suitable material properties and operating parameters. The authors would like to acknowledge the financial support of the Engineering and Physical Sciences Research Council (EPSRC) of the United Kingdom (Grant Nos. EP/N000714/1 and EP/N021142/1), National Natural Science Foundation of China (Grant Nos. 51606135 and 51776142) and Natural Science Foundation of Hubei Province (Grant No. 2016CFB156). 2021-06-29T09:06:53Z 2021-06-29T09:06:53Z 2019 Journal Article Yu, Q., Romagnoli, A., Yang, R., Xie, D., Liu, C., Ding, Y. & Li, Y. (2019). Numerical study on energy and exergy performances of a microencapsulated phase change material slurry based photovoltaic/thermal module. Energy Conversion and Management, 183, 708-720. https://dx.doi.org/10.1016/j.enconman.2019.01.029 0196-8904 0000-0001-7611-9321 0000-0003-1271-5479 0000-0001-6231-015X https://hdl.handle.net/10356/151533 10.1016/j.enconman.2019.01.029 2-s2.0-85060536533 183 708 720 en Energy Conversion and Management © 2019 Elsevier Ltd. All rights reserved. |
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Engineering::Mechanical engineering Photovoltaic/Thermal Module Microencapsulated Phase Change Material Yu, Qinghua Romagnoli, Alessandro Yang, Ren Xie, Danmei Liu, Chuanping Ding, Yulong Li, Yongliang Numerical study on energy and exergy performances of a microencapsulated phase change material slurry based photovoltaic/thermal module |
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Microencapsulated phase change material (MPCM) slurry has proven to have potential in elevating the overall performance of a photovoltaic/thermal (PV/T) module as a working fluid. In order to make full use of the superiority of MPCM slurry and further improve energy and exergy efficiencies of the PV/T module, the effects of MPCM concentration and melting temperature under a wide inlet fluid velocity range were explored based on a three-dimensional numerical model of coupled heat transfer in this study. The results show that both the energy and exergy efficiencies increased with the concentration. A lower melting temperature resulted in higher energy efficiency, whereas a higher melting temperature is helpful for exergy efficiency improvement. The slurry with an excessively low melting temperature (e.g. 27 °C) even led to lower exergy efficiency than pure water. The melting temperature needs to be precisely tailored to make a compromise between energy and exergy efficiencies. In comparison with pure water, the improvement in energy efficiency provided by the slurry was further enhanced at a lower inlet velocity, while the improvement in exergy efficiency was optimized by adjusting the inlet velocity to a certain value. The maximum improvement in energy efficiency provided by the slurry was 8.3%, whilst that in exergy efficiency was 3.23% in this work. From the above, the superiority of MPCM slurry can be further promoted by selecting suitable material properties and operating parameters. |
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School of Mechanical and Aerospace Engineering |
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School of Mechanical and Aerospace Engineering Yu, Qinghua Romagnoli, Alessandro Yang, Ren Xie, Danmei Liu, Chuanping Ding, Yulong Li, Yongliang |
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Article |
author |
Yu, Qinghua Romagnoli, Alessandro Yang, Ren Xie, Danmei Liu, Chuanping Ding, Yulong Li, Yongliang |
author_sort |
Yu, Qinghua |
title |
Numerical study on energy and exergy performances of a microencapsulated phase change material slurry based photovoltaic/thermal module |
title_short |
Numerical study on energy and exergy performances of a microencapsulated phase change material slurry based photovoltaic/thermal module |
title_full |
Numerical study on energy and exergy performances of a microencapsulated phase change material slurry based photovoltaic/thermal module |
title_fullStr |
Numerical study on energy and exergy performances of a microencapsulated phase change material slurry based photovoltaic/thermal module |
title_full_unstemmed |
Numerical study on energy and exergy performances of a microencapsulated phase change material slurry based photovoltaic/thermal module |
title_sort |
numerical study on energy and exergy performances of a microencapsulated phase change material slurry based photovoltaic/thermal module |
publishDate |
2021 |
url |
https://hdl.handle.net/10356/151533 |
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1705151304971583488 |