استفاده از انرژی خورشیدی برای بهبود عملکرد انرژی سیستم های سه گانه برای گیاهان تصفیه فاضلاب

A feasibility study was conducted on using solar energy in a conventional tri-generation system for sewage treatment plant application. Generally conventional CHP/CCHP systems can improve the biogas utilization efficiency, however, the waste heat from the power engines is limited for the digester thermal insulation most time in some colder areas, and the additional natural gas is consumed for supplement. This paper proposes a biogas and solar energy-assisted tri-generation system that upgrades the caloric value of biogas before combustion by introducing a thermochemical conversion process. The hourly dynamic energy performances of the proposed and reference systems were simulated by the established mathematic models under Tibet Lhasa weather data. Using solar energy not only reduces the dependence on the external fossil fuel, but also increase the output electric power and cooling energy. The saved natural gas in the whole year can reach 142,757 Nm3. This study may provide a new way to efficiently use the solar energy to improve the energy performance of tri-generation systems.