TY - JOUR
T1 - Experimental and numerical investigation on the cold harvest of composite phase change materials for building energy conservation
AU - Li, Jie
AU - Yang, Huiting
AU - Peng, Zian
AU - Zhang, Hang
AU - Sun, Xiaoqin
AU - Liao, Shuguang
AU - Al-Saadi, Saleh Nasser
N1 - Publisher Copyright:
© 2023 Elsevier Ltd
PY - 2024/2/1
Y1 - 2024/2/1
N2 - This paper investigates the cold energy storage of a horizontal shell-tube latent heat thermal energy storage (LHTES) unit for the cold harvest during night time. An experimental apparatus containing a horizontal circular tube with circumferential heating/cooling was designed and developed. Paraffin based phase change material (PCM) with a melting temperature of 27 °C was adopted as the cold harvest media. To improve the heat transfer rate, multi-walled carbon nanotubes (MWCNTs) were mixed with the paraffin to form a composite PCM with high thermal conductivity. A corresponding model of the composite PCM was developed and verified against the experimental data. Numerical simulations were performed for different boundary temperatures and concentrations of MWCNTs. The results show that when the heat transfer temperature difference is 20 °C, 0.05 wt% nanoparticles increase the melting rate of PCMs. When the heat transfer temperature difference was 40 °C, 0.10 wt% nanoparticles significantly affect the PCM melting rate. For low or high temperature (heat transfer temperature difference of 10 °C and 80 °C), the addition of nanoparticles is not conducive to improving the melting rate.
AB - This paper investigates the cold energy storage of a horizontal shell-tube latent heat thermal energy storage (LHTES) unit for the cold harvest during night time. An experimental apparatus containing a horizontal circular tube with circumferential heating/cooling was designed and developed. Paraffin based phase change material (PCM) with a melting temperature of 27 °C was adopted as the cold harvest media. To improve the heat transfer rate, multi-walled carbon nanotubes (MWCNTs) were mixed with the paraffin to form a composite PCM with high thermal conductivity. A corresponding model of the composite PCM was developed and verified against the experimental data. Numerical simulations were performed for different boundary temperatures and concentrations of MWCNTs. The results show that when the heat transfer temperature difference is 20 °C, 0.05 wt% nanoparticles increase the melting rate of PCMs. When the heat transfer temperature difference was 40 °C, 0.10 wt% nanoparticles significantly affect the PCM melting rate. For low or high temperature (heat transfer temperature difference of 10 °C and 80 °C), the addition of nanoparticles is not conducive to improving the melting rate.
KW - Cold harvest
KW - Composite PCM
KW - Heat transfer rate
KW - Multiwalled carbon nanotube
KW - Nanoparticle
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UR - http://www.scopus.com/inward/citedby.url?scp=85180787943&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/2036bc96-4afe-3666-86c8-bff1111969e9/
U2 - 10.1016/j.est.2023.110108
DO - 10.1016/j.est.2023.110108
M3 - Article
AN - SCOPUS:85180787943
SN - 2352-152X
VL - 78
JO - Journal of Energy Storage
JF - Journal of Energy Storage
M1 - 110108
ER -