TY - JOUR
T1 - Transient characteristics of thermal energy storage in an enclosure packed with MEPCM particles
AU - Siao, Yong Hao
AU - Yan, Wei Mon
AU - Lai, Chi Ming
N1 - Funding Information:
The financial support by the National Science Council, R. O. C. , through the contract NSC 101-2221-E-027-149-MY2 is highly appreciated. The assistance of the plotting figures from Mr. Omid Mahian is acknowledged.
Publisher Copyright:
© 2014 Elsevier Ltd
PY - 2015/9/5
Y1 - 2015/9/5
N2 - The heat transfer characteristics of phase change materials have been of continuing interest of research due to various potential technical applications, such as the latent-heat thermal energy storage, thermal protection, as well as active/passive electronic cooling. In this work, the transient characteristics of thermal energy storage in a partitioned enclosure filled with microencapsulated phase change material (MEPCM) particles were investigated experimentally and numerically. To examine the different melting temperature effects, two different MEPCM particles are tested. The core phase change materials of the MEPCM are n-octadecane with melting temperature about TM = 28 °C and 37 °C. The enclosure is partitioned and is differentially heated by the two horizontal isothermal surfaces, while the other vertical surfaces are considered thermally insulated. The studies have been undertaken for five sets of the hot and cold wall temperatures imposed across the enclosure. The consequents show that the numerical results are in agreement with the measured data. At the initial transient, the net energy storage in enclosure, Qnet, increases with the time Fo. Finally, the Qnet approaches quickly the steady state for the case with a higher temperature difference of Th − Tc. Additionally, higher dimensionless accumulated energy through the hot wall Qh and cold wall Qc is found for a case with higher hot wall temperature Th.
AB - The heat transfer characteristics of phase change materials have been of continuing interest of research due to various potential technical applications, such as the latent-heat thermal energy storage, thermal protection, as well as active/passive electronic cooling. In this work, the transient characteristics of thermal energy storage in a partitioned enclosure filled with microencapsulated phase change material (MEPCM) particles were investigated experimentally and numerically. To examine the different melting temperature effects, two different MEPCM particles are tested. The core phase change materials of the MEPCM are n-octadecane with melting temperature about TM = 28 °C and 37 °C. The enclosure is partitioned and is differentially heated by the two horizontal isothermal surfaces, while the other vertical surfaces are considered thermally insulated. The studies have been undertaken for five sets of the hot and cold wall temperatures imposed across the enclosure. The consequents show that the numerical results are in agreement with the measured data. At the initial transient, the net energy storage in enclosure, Qnet, increases with the time Fo. Finally, the Qnet approaches quickly the steady state for the case with a higher temperature difference of Th − Tc. Additionally, higher dimensionless accumulated energy through the hot wall Qh and cold wall Qc is found for a case with higher hot wall temperature Th.
UR - http://www.scopus.com/inward/record.url?scp=84919372041&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84919372041&partnerID=8YFLogxK
U2 - 10.1016/j.applthermaleng.2014.11.059
DO - 10.1016/j.applthermaleng.2014.11.059
M3 - Article
AN - SCOPUS:84919372041
VL - 88
SP - 47
EP - 53
JO - Journal of Heat Recovery Systems
JF - Journal of Heat Recovery Systems
SN - 1359-4311
ER -