Experimental study on the optimization of thermal environment and airflow organization in a ventilated underground refuge chamber using deflectors
Acceptable temperature is crucial for underground refuge chamber (URC) to ensure the safety and comfort of occupants. A novel temperature control scheme combining mechanical ventilation with deflectors was proposed for URCs. In this study, the effects of ventilation rate (VR), deflector height and d...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-05-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25002837 |
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| author | Hang Jin Zujing Zhang Ruiyong Mao Jiri Zhou Hongwei Wu Xing Liang |
| author_facet | Hang Jin Zujing Zhang Ruiyong Mao Jiri Zhou Hongwei Wu Xing Liang |
| author_sort | Hang Jin |
| collection | DOAJ |
| description | Acceptable temperature is crucial for underground refuge chamber (URC) to ensure the safety and comfort of occupants. A novel temperature control scheme combining mechanical ventilation with deflectors was proposed for URCs. In this study, the effects of ventilation rate (VR), deflector height and deflector angle on ambient temperature control performance and airflow organization of URC were investigated through orthogonal experiments. Results show that: (Ⅰ) The ambient temperature gradient of URC decreases with the increase of VR and deflector height. (Ⅱ) With VR of 350 m3/h, deflector height of 1.40 m, and deflector angle of 0°, compared to the situation without deflectors, the temperature unevenness coefficient can be effectively reduced, the head-to-foot temperature difference can meet the design standard requirements, the waste heat emissions efficiency is increased by 46.1 %, and an average decrease in ambient temperature of 2 °C (Ⅲ) The influence of various factors on the ambient temperature control performance in the URC is as follows: deflector height > VR > deflector angle. |
| format | Article |
| id | doaj-art-b00367b2545d4ed4a0ef494a5b2fb192 |
| institution | OA Journals |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-b00367b2545d4ed4a0ef494a5b2fb1922025-08-20T02:28:07ZengElsevierCase Studies in Thermal Engineering2214-157X2025-05-016910602310.1016/j.csite.2025.106023Experimental study on the optimization of thermal environment and airflow organization in a ventilated underground refuge chamber using deflectorsHang Jin0Zujing Zhang1Ruiyong Mao2Jiri Zhou3Hongwei Wu4Xing Liang5College of Civil Engineering, Guizhou Provincial Key Laboratory of Rock and Soil Mechanics and Engineering Safety, State Key Laboratory of Public Big Data, Guizhou University, Guiyang, 550025, ChinaCollege of Civil Engineering, Guizhou Provincial Key Laboratory of Rock and Soil Mechanics and Engineering Safety, State Key Laboratory of Public Big Data, Guizhou University, Guiyang, 550025, China; Corresponding author.College of Civil Engineering, Guizhou Provincial Key Laboratory of Rock and Soil Mechanics and Engineering Safety, State Key Laboratory of Public Big Data, Guizhou University, Guiyang, 550025, ChinaChina MCC5 Group CORP.LTD., MCC5 Tower, No. 9 Wuye Road, Jinjiang District, Chengdu, 610000, ChinaSchool of Physic, Engineering and computer science, University of Hertfordshire, Hatfield, AL10 9AB, United KingdomSchool of Computer Science and Mathematics, Kingston University London, KT1 2EE, United KingdomAcceptable temperature is crucial for underground refuge chamber (URC) to ensure the safety and comfort of occupants. A novel temperature control scheme combining mechanical ventilation with deflectors was proposed for URCs. In this study, the effects of ventilation rate (VR), deflector height and deflector angle on ambient temperature control performance and airflow organization of URC were investigated through orthogonal experiments. Results show that: (Ⅰ) The ambient temperature gradient of URC decreases with the increase of VR and deflector height. (Ⅱ) With VR of 350 m3/h, deflector height of 1.40 m, and deflector angle of 0°, compared to the situation without deflectors, the temperature unevenness coefficient can be effectively reduced, the head-to-foot temperature difference can meet the design standard requirements, the waste heat emissions efficiency is increased by 46.1 %, and an average decrease in ambient temperature of 2 °C (Ⅲ) The influence of various factors on the ambient temperature control performance in the URC is as follows: deflector height > VR > deflector angle.http://www.sciencedirect.com/science/article/pii/S2214157X25002837Underground refuge chamberMechanical ventilationDeflectorsAmbient temperatureAirflow organization |
| spellingShingle | Hang Jin Zujing Zhang Ruiyong Mao Jiri Zhou Hongwei Wu Xing Liang Experimental study on the optimization of thermal environment and airflow organization in a ventilated underground refuge chamber using deflectors Case Studies in Thermal Engineering Underground refuge chamber Mechanical ventilation Deflectors Ambient temperature Airflow organization |
| title | Experimental study on the optimization of thermal environment and airflow organization in a ventilated underground refuge chamber using deflectors |
| title_full | Experimental study on the optimization of thermal environment and airflow organization in a ventilated underground refuge chamber using deflectors |
| title_fullStr | Experimental study on the optimization of thermal environment and airflow organization in a ventilated underground refuge chamber using deflectors |
| title_full_unstemmed | Experimental study on the optimization of thermal environment and airflow organization in a ventilated underground refuge chamber using deflectors |
| title_short | Experimental study on the optimization of thermal environment and airflow organization in a ventilated underground refuge chamber using deflectors |
| title_sort | experimental study on the optimization of thermal environment and airflow organization in a ventilated underground refuge chamber using deflectors |
| topic | Underground refuge chamber Mechanical ventilation Deflectors Ambient temperature Airflow organization |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25002837 |
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