Design and Performance Simulation of a Novel Liquid CO2 Cycle Refrigeration System for Heat Hazard Control in Coal Mines

Zhai, Xiaowei; Xu, Yu; Yu, Zhonghua

doi:10.1007/s11630-019-1111-y

Cited by 31 publications

(13 citation statements)

References 14 publications

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“…A detailed description of the secondary indicators is used as the specific question of the questionnaire. e degree of membership of the indicators at all levels is calculated based on the questionnaire results [41,42]. At the same time, the evaluation set is established.…”

Section: Network Informationization Of Rural Tourism Based On Mvc Modelmentioning

confidence: 99%

Design and Management of Control System for Rural Tourism Network Information Based on MVC Model

Dong

2021

Mobile Information Systems

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Tourism has developed into an industry with a powerful momentum of development in the world today. With the development of information technology, information has become a powerful driving force to promote the prosperity and development of the tourism industry and the entire society. The introduction of the tourism information system can significantly improve the service level, operation level, and management level of the tourism industry, thereby accelerating tourism development. The research of this article is to help villages establish a set of MVC-based rural tourism information service systems that can promote the development of rural tourism. First of all, this article conducts demand research on tourists, rural scenic spots, and ancient villages to discover the problems in rural tourism development. Secondly, this paper combines the problems existing in constructing the various subsystems of the rural tourism information system, combined with the fuzzy comprehensive evaluation method. In this paper, we propose the rural tourism system architecture based on MVC. The system architecture consists of the user layer, service layer, business layer, and data layer. It describes the system’s implementation process from two aspects: the system’s interface design and its deployment model. Finally, the network topology structure of the rural tourism information service system based on MVC is drawn. Finally, the system’s deployment is implemented according to the network topology structure.

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Section: Network Informationization Of Rural Tourism Based On Mvc Modelmentioning

confidence: 99%

Design and Management of Control System for Rural Tourism Network Information Based on MVC Model

Dong

2021

Mobile Information Systems

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“…The deeper the mining depth, the higher the temperature of surrounding rock, and the more serious the thermal hazard. In many countries, thermal hazard in mines appears one after another [5][6][7][8]. In South Africa, gold mines are about 2800 m deep and the temperature of rock reaches 75 • C, whereas the Mponeng gold mine is about 4100 m deep and the temperature of rock reaches 66 • C. In Japan, the Chang-pan coal mines rock temperature reaches 42-48 • C and the water temperature reaches 72 • C. In the Feng-yu lead-zinc mine in Hokkaido, the temperature of rock reaches 69-130 • C. The average geothermal temperature per kilometer is 30-40 • C in Russia, with individual areas reaching 52 • C. In India, where gold mine are about 3000 m deep, the geothermal temperature reaches 70 • C. In China, some mines are one km deep, the rock temperature has exceeded 50 • C. In addition, many countries (e.g., Zambia, Mexico, Nicaragua, Poland, Germany) have thermal hazards in mines.…”

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…This study can provide the theoretical framework for phase-change heat storage backfill technology and technical guidance for the collaborative exploitation of deep mineral resources and geothermal energy. With the continuous extension of mineral resource exploitation into the deep layer, thermal hazards have become a major problem that restricts mining safety [5,13]. For thermal hazards, the control methods have gradually developed from initial ventilation, heat source control, personal protection, and other non-mechanical refrigeration to mechanical refrigeration technology, which can produce cold air, cold water, and cold ice to cooling the airflow in stope [5,14].…”

Section: Introductionmentioning

confidence: 99%

“…With the continuous extension of mineral resource exploitation into the deep layer, thermal hazards have become a major problem that restricts mining safety [5,13]. For thermal hazards, the control methods have gradually developed from initial ventilation, heat source control, personal protection, and other non-mechanical refrigeration to mechanical refrigeration technology, which can produce cold air, cold water, and cold ice to cooling the airflow in stope [5,14]. However, the mechanical refrigeration leads to an increase in mining cost and has high power consumption [15,16].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Concept, Technical System and Heat Transfer Analysis on Phase-Change Heat Storage Backfill for Exploitation of Geothermal Energy

Zhang

Liu

et al. 2020

Energies

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In view of high ground stress, high geothermal temperature, and thermal hazard during deep mineral resource exploitation, the concept of phase-change heat storage backfill was put forward in this study. Further, the corresponding technical system was constructed and the main content involved in technical system, which is the optimized proportion of the backfill slurry added with phase-change materials (PCMs), was examined. Moreover, we elaborated upon the collaborative optimization of a backfill body’s mechanical and thermal properties and the mutual cooperation on backfill mining, geothermal energy exploitation, and simultaneous stope cooling. The heat transfer behavior of a backfill body plays a key role in technology system. We numerically simulated the heat transfer among a backfill body, surrounding rock, and airflow in the heat storage process, as well as the heat transfer between backfill body and cold fluid during the heat release process. The temperature distribution of a backfill body at different heat storage/heat release times—i.e., the temperature distribution and its evolution—with heat transfer were revealed and analyzed. This study can provide theoretical guidance for a phase-change heat storage backfill, as it has an important significance for the collaborative exploitation of mineral resources and geothermal energy.

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Mapping knowledge domains for mine heat hazard: a bibliometric analysis of research trends and future needs

Zhao

Yang

Guo

et al. 2023

Environ Sci Pollut Res

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Design and Performance Simulation of a Novel Liquid CO2 Cycle Refrigeration System for Heat Hazard Control in Coal Mines

Cited by 31 publications

References 14 publications

Design and Management of Control System for Rural Tourism Network Information Based on MVC Model

Design and Management of Control System for Rural Tourism Network Information Based on MVC Model

The Concept, Technical System and Heat Transfer Analysis on Phase-Change Heat Storage Backfill for Exploitation of Geothermal Energy

Mapping knowledge domains for mine heat hazard: a bibliometric analysis of research trends and future needs

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