Mine return air thermal energy refers to the thermal energy generated during the production and ventilation process of coal mines, which is usually discarded or utilized through simple heat recovery methods and cannot fully utilize its potential energy value. The coal mine heating and air conditioning system refers to a system that provides a comfortable temperature and humidity environment for coal mine office buildings, production workshops, coal washing plants, coal mining areas, etc. The application of mine return air thermal energy in coal mine heating and air conditioning systems can achieve the goal of efficient energy utilization and energy conservation and emission reduction.
The collection of heat energy from mine return air is mainly achieved through fans in the mine ventilation system. The fan in the ventilation system can mix fresh air and return air to meet indoor temperature and humidity requirements. At the same time, the heat energy of the mine return air can also be collected and utilized through a waste heat recovery system. Through the waste heat recovery system, the heat energy of the mine return air can be collected and stored, and then transported to the heating and air conditioning system to supply hot water or hot air.
In the heating and air conditioning system of coal mines, there are several main ways to utilize the heat energy of mine return air:
Air source heat pump system: An air source heat pump system utilizes the heat energy in the air for heating or cooling. In the coal mine heating and air conditioning system, air source heat pump equipment can be installed to utilize the heat energy of the mine return air to provide thermal energy for the air source heat pump system. Through this method, the goal of efficient energy utilization and energy conservation and emission reduction can be achieved.
Water source heat pump system: The water source heat pump system utilizes the thermal energy of groundwater, lake water, river water, and other water sources for heating or cooling. In the coal mine heating and air conditioning system, the installation of water source heat pump equipment can provide thermal energy for the water source heat pump system by utilizing the heat energy of the mine return air. Through this method, the goal of efficient energy utilization and energy conservation and emission reduction can be achieved.
Hot water heating system: A hot water heating system refers to a system that uses hot water for heating. In the coal mine heating and air conditioning system, the thermal energy of the hot water heating system can be provided by utilizing the heat energy of the mine return air. Through this method, the goal of efficient energy utilization and energy conservation and emission reduction can be achieved. Specifically, a heat exchanger can be installed in the mine waste heat recovery system to transfer the return air heat energy to the hot water and then to the heating system for heating.
Air heating system: An air heating system refers to a system that uses hot air for heating. In the coal mine heating and air conditioning system, the thermal energy of the air heating system can be provided by utilizing the heat energy of the mine return air. Specifically, a heat exchanger can be installed in the mine waste heat recovery system to transfer the return air heat energy to the air and then to the heating system for heating.
In summary, the application of mine return air thermal energy in coal mine heating and air conditioning systems has great potential and value. Through reasonable utilization, not only can the goal of efficient energy utilization and energy conservation and emission reduction be achieved, but also energy waste in coal mine production and ventilation processes can be reduced, contributing to sustainable development. Therefore, coal mining enterprises should strengthen the utilization and management of mine return air thermal energy, promote good mine heating and air conditioning technology and equipment, and make positive contributions to the construction of green coal mines and green society.
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