Research on Cogeneration System of Heat and Electricity Biogas Based on Solar Energy and Biomass Energy

A household thermoelectric biogas combined power supply system based on solar energy and biomass energy was established. Taking a 117 m2 single building in Zhangma New Village, Minqin County, Wuwei City, Gansu Province as the research object, the energy supply performance and influencing factors of the system were experimentally studied and analyzed, and the environmental analysis was carried out. The results show that the whole heating period can meet 69% of the heat demand of the building. During the test period, the system can meet the demand of cooking gas, with a cumulative gas production of $\mathbf{110.7} \mathbf{m}^{\mathbf{3}}$ and an average methane content of 55%. The system can meet part of the users' demand for electricity in the heating season, and can completely meet the demand in the non-heating season. The system can save standard coal 3556 kg, reduce CO2 9317 kg, treat sheep manure $\mathbf{9.2}\ \mathbf{m}^{\mathbf{3}}$ and produce efficient marsh fertilizer $\mathbf{11}\ \mathbf{m}^{\mathbf{3}}$ per year.