Thermal Performance Analysis of an Underground Closed Chamber with Human Body Heat Sources under Natural Convection

Journal article

Zhang, Z., Day, R., Wang, K., Wu, H. and Yuan, Y. (2018). Thermal Performance Analysis of an Underground Closed Chamber with Human Body Heat Sources under Natural Convection. Applied Thermal Engineering. 145 (145), pp. 453-463. https://doi.org/10.1016/j.applthermaleng.2018.09.068

Publication dates
Authors	Zhang, Z., Day, R., Wang, K., Wu, H. and Yuan, Y.
Abstract	In this article, a combined experimental and numerical study has been performed to investigate the thermal performance of a mine refuge chamber (MRC) under natural convection. In the current study, a 20-hour heating experiment is carried out in a fifty-person MRC laboratory and the heat lamps are utilized to simulate the human heat loss. A new analytical model is proposed to predict the air temperature and validated against the experimental data. Sensitivity analysis is performed to further investigate the effects of the thermal parameters of the rock. Results indicated that: (1) two different air temperature increase stages, rapid and slow increase stages, are observed in the MRC; (2) A new analytical method for predicting the air temperature in MRC under natural convection is proposed, it shows that the air temperature increasing trend becomes slow with the increase of the thermal conductivity, density and specific heat capacity of the rock; (3) the surface heat transfer coefficient on the vertical walls reaches the largest and it increases linearly with air temperature.
Year	2018
Journal	Applied Thermal Engineering
Journal citation	145 (145), pp. 453-463
Publisher	Elsevier
ISSN	1359-4311
Digital Object Identifier (DOI)	https://doi.org/10.1016/j.applthermaleng.2018.09.068
Online	21 Sep 2018
Publication process dates
Accepted	15 Sep 2018
Deposited	24 Jan 2024
Accepted author manuscript	ATE_Manuscript_ATE.pdf License CC BY-NC-ND 4.0 File Access Level Open

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