Design And Performance Analysis Of Mine Return Air Source Heat Pump System

Mine return air contains a large number of low-temperature heat, and the temperature and humidity remained constant, this part of energy has considerable value in use. This paper proposes the combined use of heat pump technology and exhaust air extraction device, the conversion of the mine return air from low taste to higher with a small amount of electrical energy can be achieved, thus to replace the traditional boiler room, satisfy the need of energy for heating in winter and cooling in summer, wellhead antifreeze and cooling, and to provide heat source for the whole year hot water, reduce the use of coal mine and the discharge of pollutants, thus realized the concept of "mining coal while not consuming coal" in the true sense. Furthermore, given that Mine Return-Air-Source Heat Pump System relies on the waste heat in mining sites, the cost of energy use is far less than that of other patterns of energy supplies. So, Mine Return-Air-Source Heat Pump System boasts highly interests both in social and economic aspects, which is worthy for wide spread and study.Based on the principle of Mine Return-Air-Source Heat Pump System, this thesis described the composition and characteristics of the system, this thesis analyzed the source of energy reserves in mine return air, proposed the spray heat transfer model of the return air heat extraction device, analyzed the principle of the spray heat transfer by relevant theories. Combined with the actual case, designed the mine return air source heat pump system. In the performance analysis of the mine return air source heat pump system, this thesis researched on the horizontal and vertical heat extraction device, then had a comparative analysis of their advantages and disadvantages, and in combination with examples, made a design calculation. A spray heat transfer model was established for heat recovery, then used simulation software FLUENT to simulate. By analyzing the simulation data, got the influence of different factors on the spray heat transfer efficiency, provided a theoretical basis for the optimization of the mine return air heat exchanger.Finally, taking Huainan coal mine as an example, combined with the actual data of before and after reform, analyses the initial investment and operation costs of the system, compared with the traditional coal-fired boiler system, Reflected the superiority of Mine Return-Air-Source Heat Pump System from from three aspects of energy efficiency, economic benefits and environmental benefits.