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
AuthorsZhang, 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.

Year2018
JournalApplied Thermal Engineering
Journal citation145 (145), pp. 453-463
PublisherElsevier
ISSN1359-4311
Digital Object Identifier (DOI)https://doi.org/10.1016/j.applthermaleng.2018.09.068
Publication dates
Online21 Sep 2018
Publication process dates
Accepted15 Sep 2018
Deposited24 Jan 2024
Accepted author manuscript
License
File Access Level
Open
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