Refuge Chamber Phase Change Refrigeration Expert

        In order to further strengthen coal mine safety production work and comprehensively improve coal mine safety guarantee capabilities, According to the "State Administration of Work Safety and State Administration of Coal Mine Work Safety on the construction and improvement of the" six major systems "for underground coal mine safety and avoidance (referring to detection and monitoring system, underground personnel positioning system, emergency evacuation system, pressure air self-rescue system, water supply rescue system and communication system)", before the end of June 2012, All mines with coal (rock) and gas (carbon dioxide) outbursts, as well as mines with high gas in central enterprises and key state-owned coal mines that are prone to natural coal seams, must complete the construction and improvement of emergency evacuation systems; Before the end of June 2013, all other coal mines must complete the construction and improvement of emergency evacuation systems.

Overview of phase change materials

Phase change material definition

Phase change material (PCM-Phase Change Material) refers to a substance that changes its physical state with temperature changes and can provide latent heat. It absorbs or releases a large amount of heat from the outside world by changing its physical state to achieve the influence and control of the surrounding environment temperature.

        Our phase change materials use very stable chemical materials to store energy and refrigerate through changes in physical states and are used in refuge chambers. The application research and development of phase change materials has been listed as a national research and development and utilization sequence in my country, and will become a green and energy-saving temperature control carrier in the field of temperature control.

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Chamber Refrigeration-Advantage Analysis of Phase Change Materials

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Product specifications of phase change materials for refrigeration of refuge chamber

Phase change refrigeration scheme of refuge chamber

Calculation of Phase Change Material Dosage

        The average power of the human body is about 200W, and it is about 75W when sleeping and watching TV. The average 24-hour metabolic level of each person is 11.88 MJ. According to the latent heat of phase change materials, which is 350KJ/KG, about 34KG of phase change materials are needed every day, and 136KG is needed in 4 days. The amount of phase change materials is determined according to the number of people involved in the chamber.

        Current Mainstream Phase Change Refrigeration Schemes

Natural water-cooled phase change energy storage bag

        If the underground ambient temperature is suitable or the underground water temperature conditions are suitable (< 24 °C), the phase change material can be packed in aluminum foil bags, put into a metal box, and placed in a refuge chamber. Usually, air-cooling or water-cooling technology is used to make the phase change material in a crystalline state.

Curtain-hanging phase change energy storage sheet

        The curtain-hanging phase change energy storage sheet solves the problems of long-term storage, cooling release speed and installation space in the life-saving chamber. The curtain-hanging type is adopted, and the size of the home can be designed according to the survival length of the chamber and the height of the upright walls on both sides. It is installed in vertical double layers or multi-layers, which can be moved at will, occupies a small area, absorbs heat on both sides, and has a heat absorption area of 0.039 ㎡.

Phase change cooling suit

 A set of phase change cooling clothing: a flame retardant anti-static vest + a set of phase change ice packs.

1.The vest is a one-size design, and its size can be adjusted by shoulder and waist Velcro.

2.The wrapping material of the phase change ice pack is aluminum foil film, which has high thermal conductivity and can effectively prevent thermal radiation.

3.The phase change ice pack can be placed in a cool place indoors (suitable below 20 degrees) to allow the phase change material to store cold and crystallize. If necessary, quickly Cold storage, can be placed in air conditioner or refrigerator for cooling, the cooling time should not exceed 20 minutes, and one cold storage can be continuous

Use for 4 hours.

4.If the phase change cooling clothing is not used, it should be stored below 20 ℃.

5.The phase change ice pack is filled with phase change material, which is safe, green, odorless and can be repeatedly used more than 5,000 times.

Life-saving chamber/bulkhead phase change plate

        The phase change board is made of HDPE (high-density polyethylene) as the packaging material, and the interior is filled with phase change material to make a board or pipe. HDPE has high thermal conductivity, heat resistance, and drop resistance. The phase change plate can be laid flat in the wall of the chamber.