Cold Area Of Solar Energy And Biogas Complementary Heating System Study

In recent years, environmental pollution and energy shortage problem is becoming more and more serious, which building energy consumption to its "contribution" is rather large. In the building energy consumption, the rural house heating energy consumption accounts for a large part. Based on the above issues, in the case of fully considering the building energy efficiency, this paper put forward suitable for cold areas of solar energy and biogas complementary heating system, form a formation of complementary energy to achieve a relatively stable winter heating in the entire heating period.This paper took a single house village in Qinhuangdao City, Hebei Province as an example, the author firstly carried out design and calculation on the system, the content includes: the heat load of the building, the supply and return water temperature and the coil spacing of the radiant floor heating system, biogas pool volume and design of the heating coil, collector area, storage tank volume, gas water heaters, circulating pump, etc.Then the experimental research was carried out on the designed system, analyzed the operation of the system, mainly choose the indoor thermal environment, the condition of heat collector sets and biogas producing systems are analyzed. At the same time, the system was modeled and analyzed using TRNSYS, compared with the experimental results, obtained the conclusions. And by using the FLUENT software simulated and analyzed the temperature distribution in the soil around the biogas digesters, obtained the effect of thermal insulation of biogas digesters and the vegetable greenhouse.Finally, the system is evaluated, evaluation content includes: economic efficiency, energy saving and environmental benefits, obtained that the energy-saving benefit and environmental benefit is remarkable. The installation angle of the collector, the flow of collector, storage tank volume and collector area was optimized on the use of TRNSYS.