Design Discussion On The Combined Heating System In Cold Area

In recent years, building energy consumption accounts for a increasing large proportion of total social energy consumption, with its big pollution to the environment, the green building has gradually become the focus of attention. Given that techniques of dealing with building energy and environment protection in China is relatively backward, and the quantity of high energy consumption buildings is quite large, thus the heating energy consumption of high energy consuming buildings are 1.5 times higher than that of the national standard, which Leads to the great waste of social resources and seriously polluting the environment. On the basis of these considerations, this paper presents the heating system of solar energy and methane for building heating in the cold areas.Solar energy combined gas heating system(abbreviation: combined heating system) produces hot water through the relatively and stably complementary way. One part of hot water produced by heating system provide heating for building through the way of floor radiation; the other part of water will heat the pipe that arranged in the methane tank for heating biogas fermentation which combined with the temperature control system to keep the internal temperature of the pool in the optimum fermentation temperature(298K). In this paper, mainly based on the simulation analysis, the heating system is simulated under the same external conditions. This paper is trying to find the most environmentally friendly and energy-saving heating plan, which based on the quality of life in the building.In theory, this paper introduced the development and study status of en ergy consumption, solar radiation, biomass, soil temperature field, methane production at home and abroad and factors affecting the production of biogas, solar collector, floor radiation and other basic theoretical knowledge with circumstance.The whole heating system design, building energy consumption calculation, optimization calculation volume of biogas digesters, solar collector area, biogas water heater related calculation and selection were calculated. The operation conditions of the system are analyzed under different weather conditions.The temperature of the biogas pools and the surrounding soil is simulated in ANSYS simulation software. The heat dissipating capacity of biogas digesters is determined depending on the simulation results.Finally, this system is evaluated by economic efficiency, energy efficiency and environmental benefits of the three aspects of comprehensive comparative analysis, just to find out the optimal heating scheme of the heating system.