Numerical Investigation of Heat Transfer and Phase Change Characteristics of Cold Load and Storage Functional CPB in Deep Mine

Wang, Mei; Wang, Shiqi; Lyu, Bo; Zhang, Bo; Zhang, Xiaoyan; Zhao, Yujiao; Huan, Chao

doi:10.3389/feart.2020.00031

Cited by 10 publications

(2 citation statements)

References 33 publications

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“…The mechanical cooling technology has been widely used in high-temperature mines [ 4 – 6 ]. The cooling load of the working face is an important parameter for optimizing the cooling system, which is crucial to achieve the cooling effect [ 7 ]. The cooling load can be calculated by the analysis method of heat sources, the simplified method and the back-analysis method [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

Sensitivity analysis of heat and mass transfer at working face in high-temperature mine

Zhou,

Zhang,

Zhang

2024

PLoS ONE

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Thermal damage from heat sources severely affects the safety of deep mine production. Heat and mass transfer between heat sources and airflow leads to the increase of the airflow temperature (AFT), moisture content of airflow (AFMC) and relative humidity of airflow (AFRH). This study aims to quantify uncertainty contributions of the working face parameters on AFT, AFMC and AFRH and find their main contributors. The flow, geometric and physical parameters are chosen as uncertainty sources. Subsequently, Sobol indices are obtained using the point-collocation non-intrusive polynomial chaos method, denoting the sensitivity of each input parameter. It was found that the inflow wind temperature and the wind velocity are two top factors influencing AFT and AFMC, while relative humidity of inflow wind and the wind velocity are two top factors influencing AFRH. In the single factor analysis, the uncertainty contributions of the inflow wind temperature on AFT and AFMC, and relative humidity of inflow wind on AFRH can exceed 0.7, which is higher than those of the wind velocity. The geometric parameters of the working face, namely the length, width and height, and ventilation time are also significant quantities influencing AFT, AFMC and AFRH. Compared to AFT and AFMC, two other significant quantities influencing AFRH are the thermal conductivity of coal and the original temperature of the rock.

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Section: Introductionmentioning

confidence: 99%

Sensitivity analysis of heat and mass transfer at working face in high-temperature mine

Zhou,

Zhang,

Zhang

2024

PLoS ONE

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“…Pokhrel et al [11] proposed that solar energy be used to deploy ice storage systems, and the ice generated can be used for cooling in deep mines through different heat exchangers. Wang et al [12] proposed a new cooling method to solve the problem of the high cooling costs of mines. In the field of filling mining, the cooling function of cemented paste filling is endowed by mixing it with phase-change materials.…”

Section: Introductionmentioning

confidence: 99%

Influencing Factors of a Cooling System Based on Low-Temperature Mine Water as a Direct Cooling Source

Jiang¹,

Cui²,

Mu³

et al. 2022

Energies

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With the depletion of shallow metal mineral resources, deep mining has become more common. In the process of deep mining, heat hazards in mines seriously threaten the health of personnel and the safety of mining operations. According to the flow and low-temperature characteristics of abundant water in Maoping Lead Zinc Mine, this paper proposes the direct use of the low-temperature water inflow of the mine as the cold source by which to conduct the heat exchange with a single spiral-tube heat exchanger for mine cooling. An experimental platform was built for the cooling system to allow us to explore the mechanism of the influence of the inlet air volume and air temperature and the inlet water temperature and flow on the cooling effect of the single spiral-tube heat exchanger. It was found that with the increase in the inlet air volume and inlet water temperature, the cooling efficiency of the heat exchanger decreased, while with the increase in the inlet air temperature, the cooling efficiency of the heat exchanger increased. Within the experimental range, 127.2 m3/h was found to be the optimum inlet air volume, and 33.0 °C was the most appropriate inlet air temperature; the water temperature of Maoping Coal Mine is about 20 °C throughout the year, and the industrial test site can reduce the wind temperature of 31.5 °C to 23.9 °C. The inlet water flow is positively related to the cooling effect. With the increase in the water flow, the outlet temperature of the air flow at each working point was continuously reduced, and the cooling effect of the heat exchanger was improved. The moisture content of the inlet air flow can be reduced by increasing the low-temperature inlet water flow. Through experiments, the feasibility of the cooling system that directly uses the mine’s low-temperature water as the cold source was verified. A multiple linear regression analysis equation for the cooling system model is proposed, which provides a reference for formulating effective measures to prevent and control heat hazards in mines.

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A review of the research progress of cooling technology in deep mining

Qu,

Zhang,

Zhang

et al. 2024

J Therm Anal Calorim

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Numerical Investigation of Heat Transfer and Phase Change Characteristics of Cold Load and Storage Functional CPB in Deep Mine

Cited by 10 publications

References 33 publications

Sensitivity analysis of heat and mass transfer at working face in high-temperature mine

Sensitivity analysis of heat and mass transfer at working face in high-temperature mine

Influencing Factors of a Cooling System Based on Low-Temperature Mine Water as a Direct Cooling Source

A review of the research progress of cooling technology in deep mining

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