Citation

Yu Z, Yang S, Gu Y, Deng J. China Saf. Sci. J. 2020; 30(6): 98-105.

Copyright

(Copyright © 2020, China Occupational Safety and Health Association, Publisher Gai Xue bao)

DOI

10.16265/j.cnki.issn1003-3033.2020.06.015

PMID

unavailable

Abstract

In order to investigate heat transfer characteristics of LCO2 injected in loose coal and study influence of injection parameters on temperature field of coal, experiments on LCO2 injection process were carried out by using self-made test platform. Then, temperature changes of coal and influence of injection parameters on refrigeration range were analyzed. The results show that when LCO2 is injected into loose coal, phase transition occurs immediately, and an intensive heat transfer process starts and forms a phase-change cooling area (<-56. 6 ℃) which sees a logarithm increase over injection time in direction of CO2 jet. Meanwhile, the cooling area increases in a form of exponential, logarithm and linear function respectively along with increase of injection flow, caliber and pressure. © 2020 China Safety Science Journal

Language: zh