Research on change characteristics of environment in micro space of mine ventilation suits

doi:10.16265/j.cnki.issn1003-3033.2022.05.0819

Abstract

Abstract:

In order to reveal the heat transfer characteristics of mine ventilation suits in microspace, explore the local cooling effect of ventilation clothing on the human body, the heat source of ventilation clothing microspace was studied, and the local cooling mechanism of the ventilation clothing was analyzed through comparing numerical simulations with real person training test. The influences of ambient temperature, air intake pipe ventilation rate and intake pipe structure on human skin temperature and microspace climate environment were analyzed. The research results show that the working environment temperature has a significant impact on the human skin temperature and the microspace environment temperature, while the air intake duct ventilation is not sensitive to the human skin temperature and the microspace environment temperature, but it has a great influence on the wind speed of the microspace internal environment.When the inlet air volume increases by 5 m³/h, the skin temperature and microspace environment temperature only decrease by 0.1-0.2 ℃. With the increase of inlet air volume, the wind speed in the clothing microspace increase, the human skin blowing feeling strengthens, and the thermal comfort increases. It is found that the cooling effect is the best when the ventilation rate is 10 m³/h

Key words: mine ventilation suit, microspace, heat transfer characteristics, numerical simulation, training test, local cooling

YOU Bo, MAO Cong, SHI Shiliang, LIU Heqing, LU Yi, LI Min. Research on change characteristics of environment in micro space of mine ventilation suits[J]. China Safety Science Journal, 2022, 32(5): 185-193.

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部位	微环境Q/ (m³·h^-1)	30 ℃			32 ℃			34 ℃
部位	微环境Q/ (m³·h^-1)	5	10	15	5	10	15	5	10	15
前'	温度/℃	30.82	30.66	30.43	31.95	31.89	31.77	32.89	32.74	32.63
前'	风速/(m·s^-1)	0.148	0.381	0.428	0.175	0.365	0.441	0.139	0.349	0.413
后'	温度/℃	31.01	30.89	30.91	32.11	31.73	31.95	32.94	32.65	32.79
后'	风速/(m·s^-1)	0.114	0.342	0.411	0.129	0.344	0.427	0.156	0.358	0.431
左'	温度/℃	31.13	30.88	30.69	32.15	32.02	32.14	33.11	32.92	32.75
左'	风速/(m·s^-1)	0.154	0.357	0.465	0.134	0.382	0.459	0.141	0.381	0.455
右'	温度/℃	31.33	31.25	31.12	32.22	31.83	32.03	33.28	33.13	32.71
右'	风速/(m·s^-1)	0.118	0.298	0.381	0.124	0.301	0.414	0.112	0.285	0.389
平均温度/℃		30.93	30.79	30.68	32.04	31.82	31.87	32.93	32.71	32.71
平均风速/(m·s^-1)		0.131	0.359	0.419	0.151	0.354	0.434	0.146	0.352	0.422

部位	微环境Q/ (m³·h^-1)	30 ℃			32 ℃			34 ℃
部位	微环境Q/ (m³·h^-1)	5	10	15	5	10	15	5	10	15
前'	温度/℃	30.88	30.64	30.49	32.09	32.16	31.83	32.78	32.87	32.66
前'	风速/(m·s^-1)	0.106	0.269	0.372	0.115	0.244	0.361	0.099	0.256	0.381
后'	温度/℃	30.95	30.91	30.73	32.21	32.14	31.97	33.03	32.96	32.91
后'	风速/(m·s^-1)	0.081	0.251	0.353	0.093	0.253	0.359	0.086	0.255	0.367
左'	温度/℃	31.21	31.15	31.01	32.15	31.93	32.01	33.19	33.01	33.14
左'	风速/(m·s^-1)	0.088	0.214	0.357	0.075	0.237	0.345	0.088	0.237	0.363
右'	温度/℃	31.19	31.02	30.88	32.11	32.02	31.94	33.07	32.97	33.11
右'	风速/(m·s^-1)	0.101	0.229	0.335	0.113	0.275	0.328	0.095	0.261	0.337
平均温度/℃		30.93	30.79	30.63	32.15	32.14	31.90	32.92	32.92	32.81
平均风速/(m·s^-1)		0.094	0.258	0.362	0.103	0.378	0.359	0.092	0.255	0.373