Effects of Thermal Water Upwelling on Microclimate Change in the High Geo-Temperature Roadway
Deep-circling thermal water upwelling and trickling to high geo-temperature roadway obviously alter the microclimate in mines, which brings difficulty to the prediction of airflow temperature and humidity. This is the basis of air-conditioning cooling load calculation. The heat and mass transfer bet...
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| Format: | Article |
| Language: | English |
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Wiley
2021-01-01
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| Series: | Shock and Vibration |
| Online Access: | http://dx.doi.org/10.1155/2021/6639413 |
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| author | Junhui Wang Zhijun Wan Hongwei Zhang Jingchao Wang Yi Wang Yuan Zhang Sifei Liu Ning Lu |
| author_facet | Junhui Wang Zhijun Wan Hongwei Zhang Jingchao Wang Yi Wang Yuan Zhang Sifei Liu Ning Lu |
| author_sort | Junhui Wang |
| collection | DOAJ |
| description | Deep-circling thermal water upwelling and trickling to high geo-temperature roadway obviously alter the microclimate in mines, which brings difficulty to the prediction of airflow temperature and humidity. This is the basis of air-conditioning cooling load calculation. The heat and mass transfer between trickling water and airflow is rather complicated. Moreover, humid air exhibits the accumulation effect of heat and humidity in the long-distance flow process. In this paper, an apparatus was designed and developed to explore the influence of thermal water trickling on the airflow thermal parameters of a section of roadway (1L–39L, in which 1L–9L is the trickling section). The results show the following (1) With the rise of trickling water temperature, the total enthalpy difference of dry air in the roadway increases within a small range and that of humid air goes up nonlinearly. Besides, the increase of trickling water flow rate has an insignificant effect on the sensible heat of the airflow, while it plays a notable role in increasing the latent heat of the airflow. (2) High trickling water temperature results in a higher growth rate of humidity ratio at 19L than those at 29L and 39L in the early stage of thermal water trickling. Meanwhile, sensible heat exchange, which becomes strong after thermal water trickles for over 30 min, complicates the enthalpy difference variation rates of wet air at the three measuring points. (3) The three measuring points in the 19L–39L section all display a process of enthalpy growth with time. In the case of point 39L, the enthalpy difference of humid air surges sharply when the trickling water temperature is 80°C or the flow rate is 200 ml/min. The research results boast some reference value for thermal water management and microclimate change forecasting after the airflow passes through a trickling roadway. |
| format | Article |
| id | doaj-art-970904eebfc24d7bb16cff19ff53fed0 |
| institution | Kabale University |
| issn | 1070-9622 1875-9203 |
| language | English |
| publishDate | 2021-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Shock and Vibration |
| spelling | doaj-art-970904eebfc24d7bb16cff19ff53fed02025-08-20T03:37:09ZengWileyShock and Vibration1070-96221875-92032021-01-01202110.1155/2021/66394136639413Effects of Thermal Water Upwelling on Microclimate Change in the High Geo-Temperature RoadwayJunhui Wang0Zhijun Wan1Hongwei Zhang2Jingchao Wang3Yi Wang4Yuan Zhang5Sifei Liu6Ning Lu7Key Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaKey Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaSchool of Energy and Mining Engineering, China University of Mining and Technology, Beijing 100083, ChinaKey Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaCollege of Safety and Emergency Management Engineering, Taiyuan University of Technology, Taiyuan, Shanxi 030024, ChinaKey Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaKey Laboratory of Deep Coal Resource Mining (CUMT), Ministry of Education of China, School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, ChinaDananhu No. 1 Coal Mine, CHN Energy Investment Group Co., Ltd., Hami 839000, ChinaDeep-circling thermal water upwelling and trickling to high geo-temperature roadway obviously alter the microclimate in mines, which brings difficulty to the prediction of airflow temperature and humidity. This is the basis of air-conditioning cooling load calculation. The heat and mass transfer between trickling water and airflow is rather complicated. Moreover, humid air exhibits the accumulation effect of heat and humidity in the long-distance flow process. In this paper, an apparatus was designed and developed to explore the influence of thermal water trickling on the airflow thermal parameters of a section of roadway (1L–39L, in which 1L–9L is the trickling section). The results show the following (1) With the rise of trickling water temperature, the total enthalpy difference of dry air in the roadway increases within a small range and that of humid air goes up nonlinearly. Besides, the increase of trickling water flow rate has an insignificant effect on the sensible heat of the airflow, while it plays a notable role in increasing the latent heat of the airflow. (2) High trickling water temperature results in a higher growth rate of humidity ratio at 19L than those at 29L and 39L in the early stage of thermal water trickling. Meanwhile, sensible heat exchange, which becomes strong after thermal water trickles for over 30 min, complicates the enthalpy difference variation rates of wet air at the three measuring points. (3) The three measuring points in the 19L–39L section all display a process of enthalpy growth with time. In the case of point 39L, the enthalpy difference of humid air surges sharply when the trickling water temperature is 80°C or the flow rate is 200 ml/min. The research results boast some reference value for thermal water management and microclimate change forecasting after the airflow passes through a trickling roadway.http://dx.doi.org/10.1155/2021/6639413 |
| spellingShingle | Junhui Wang Zhijun Wan Hongwei Zhang Jingchao Wang Yi Wang Yuan Zhang Sifei Liu Ning Lu Effects of Thermal Water Upwelling on Microclimate Change in the High Geo-Temperature Roadway Shock and Vibration |
| title | Effects of Thermal Water Upwelling on Microclimate Change in the High Geo-Temperature Roadway |
| title_full | Effects of Thermal Water Upwelling on Microclimate Change in the High Geo-Temperature Roadway |
| title_fullStr | Effects of Thermal Water Upwelling on Microclimate Change in the High Geo-Temperature Roadway |
| title_full_unstemmed | Effects of Thermal Water Upwelling on Microclimate Change in the High Geo-Temperature Roadway |
| title_short | Effects of Thermal Water Upwelling on Microclimate Change in the High Geo-Temperature Roadway |
| title_sort | effects of thermal water upwelling on microclimate change in the high geo temperature roadway |
| url | http://dx.doi.org/10.1155/2021/6639413 |
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