Simulation of coal gangue geothermal energy thermoelectric power generation system

In recent years, with the acceleration of industrialization and the continuous upgrading of consumption structure, energy consumption has increased year by year, among which primary energy consumption such as coal and oil accounts for about 70 % of total energy consumption. Therefore, more and more attention has been paid to energy conservation and the development and utilization of new energy. In the context of the increasingly tense global energy situation, the development and utilization of geothermal energy, shallow geothermal energy and other resources have received more and more attention and research. Therefore, it is very important to explore the utilization of geothermal energy to solve the problem of China's over dependence on fossil energy. The useless solid waste coal gangue produced in the process of coal mining gradually accumulates to form a coal gangue mountain. Due to the special flammable chemical properties of coal gangue, there is a tendency of spontaneous combustion. The combustion of coal gangue mountain will release toxic gases, which will have a huge impact on the surrounding production and life. If the heat stored in the coal gangue mountain is used, it can not only improve the environmental pollution caused by spontaneous combustion of coal gangue mountain, but also make use of a large amount of heat in the coal gangue mountain. Based on this background, this paper studies the thermal energy of coal gangue mountain. Based on this, this paper designs a thermoelectric power generation system based on coal gangue mountain heat energy. According to the field data, the whole process of thermoelectric conversion is simulated by the finite element simulation software comsol. The thermal energy development model of coal gangue mountain, the heat transfer model of gravity heat pipe, the thermoelectric power generation module and the numerical model of thermoelectric coupling are established. Through experimental comparison, it is verified that after determining the model of thermoelectric power generation sheet, the influence of power generation is only the temperature difference between the cold and hot ends.