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Surrounding rock cold storage and phase-change heat storage coupling cooling method applicable to refuse chambers

A refuge chamber and phase change heat storage technology, which is applied in earthwork drilling, mine/tunnel ventilation, safety devices, etc., can solve problems such as large amount of carbon dioxide consumption, leakage, and large volume of storage containers, and achieve the effect of lowering the temperature

Inactive Publication Date: 2015-03-18
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the existing cooling methods for refuge chambers include air-conditioning cooling, ice storage cooling, high-pressure carbon dioxide expansion cooling and phase change cooling, etc. Among them, only high-pressure liquid carbon dioxide expansion cooling and phase change cooling can be realized without electricity, but the amount of carbon dioxide is large , resulting in a large volume of the storage container and the possibility of leakage, it is difficult to restore the cooling system after use, and carbon dioxide is a greenhouse gas

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0006] The first step is to install a phase-change cooling device in the refuge chamber; the second step is to use natural cold sources to artificially cool the refuge chamber intermittently to reduce the initial temperature of the surrounding rock, phase-change cooling device and the room. After a disaster occurs in the mine, the refugees enter the refuge chamber to avoid danger. The human body loses heat to cause the indoor temperature to rise. The indoor air first convects heat exchange with the lower temperature surrounding rock, reducing the indoor heat load and controlling the indoor temperature of the refuge chamber; As the surrounding rock absorbs heat, the temperature of the surrounding rock gradually increases, and the heat exchange with the air decreases, and the indoor temperature will further rise. When the indoor temperature rises to the melting point of the phase change material, the phase change material melts and stores heat, controlling the refuge The indoor t...

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PUM

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Abstract

The invention discloses a surrounding rock cold storage and phase-change heat storage coupling cooling method applicable to refuse chambers, and belongs to the field of downhole safety and refrigeration. The surrounding rock cold storage and phase-change heat storage coupling cooling method includes mounting phase-change cooling devices in the refuse chambers; carrying out intermittent artificial cooling on indoor environment at ordinary times to reduce initial temperatures of surrounding rock, the phase-change cooling devices and the indoor environments; reducing the temperature of the surrounding rock to realize cold storage effects by the aid of the surrounding rock; expanding working temperature ranges of phase-change materials to increase the heat absorption speeds of the phase-change materials. Heat in the refuse chambers can be absorbed by the aid of the surrounding rock and the phase-change cooling devices, and accordingly the purpose of cooling the indoor environments of the refuse chambers can be achieved; refuge personnel can enter the refuse chambers to avoid risks after disasters occur in mines, and the indoor temperatures of the refuge chambers can be effectively controlled within 96 hours by the aid of the method without external power. The surrounding rock cold storage and phase-change heat storage coupling cooling method has the advantages of simplicity, feasibility, safety, reliability and zero maintenance.

Description

technical field [0001] The invention relates to a surrounding rock cold storage and phase change heat storage coupling cooling method suitable for refuge chambers, belonging to the field of underground safety and refrigeration. Background technique [0002] Emergency avoidance in coal mines should meet the requirements of no high-power and large-capacity power supply, no potential safety hazards, no influence on mine ventilation and safe production, convenient for rapid emergency avoidance, maintenance-free or easy to maintain, economical and practical, etc. When a disaster accident occurs underground in a coal mine, people in distress will enter a closed refuge chamber to avoid danger, causing the temperature in the refuge chamber to gradually rise. Therefore, it is necessary to cool down the refuge chamber to meet the protection requirement that the temperature is not higher than 35°C, and at the same time require the rated protection time to reach 96 hours without any ext...

Claims

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Application Information

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IPC IPC(8): E21F3/00E21F11/00
CPCE21F3/00E21F11/00
Inventor 袁艳平曹晓玲高祥骙
Owner SOUTHWEST JIAOTONG UNIV