Study On The Combined Circle System Of The Solar And Biomass

Soler energy and biomass energy are two types of abundant renewable energy in rural areas. And due to the high efficiency and low cost of their utilization, they are quite important to improve the living environment, ecological environment in rural areas and satisfy rural muti-level demands for energy. Based on the characters that the economical heat-collecting temperature of solar energy could be accordance with the high efficient thermostatic anaerobic fermentation temperature of biomass energy, our team proposed thermostatic biogas production system heated by solar energy and studied the performance of this system in the early days.As one of efficient utilizations systems, distributed energy system is a hotpot of research on the current energy systems. Distributed energy system which based on the traditional energy are researched very much at present, but there are a little researches on the renewable energy. In this situation, this paper builded a combined circle system of the solar and biomass and analysis the performances of the system. Followings are main study content and results:1. Build the combined circle system of the solar and biomass and analysis the performances of the system. This paper puts forward to a integration scheme which combines the solar heat collection, thermostatic anaerobic fermentation temperature, the micro gas turbine to generate electricity, ammonia absorption combined power and cooling, proposed a combined circle system of the solar and biomass. The biogas volume of the combined circle system of the solar and biomass is210m, the main raw material for fermentation of the system is cow dung, with52℃fermentation, daily production is420m3. After desulfurization and dehydration, the biogas is put into storage tanks, and now the methane content is more than98%, with0.0024kg/s flow into the micro gas turbine, after combusting in the combustion chamber,30.5kW power output by the simulated of Aspen Plus, exhaust after recycling heat regenerator at275℃. High smoke exhaust as the heat resource of power and cooling system, generating5.16kW power and2.36kW refrigeration. The rest of the exhaust gas recycling twice,33.56kW heat was used for heating. The energy efficiency of the system is60.5%, and the exergy of the system is45.5%.2. This topic also discuss how the ambient temperature and the methane content to effect the performance of the system. Using Aspen Plus to simulate how the ambient temperature and the methane content to effect the efficiency of micro gas turbine and concluded the performance curve of parameters changing.3. The whole life circle assessment of the combined circle system of the solar and biomass. The system follows the principle named "Temperature Correspond to the Cascade Utilization", it has a superior performance in economic and environment. The static payback time of this system is6.02years. It can deal with fresh cow dung811.4tons, reduce emission of H2S698.2kg per year, gain elemental sulfur657kg.The innovation of subject lies in:Integrate solar heat collection, thermostatic anaerobic fermentation temperature, micro gas turbine to generate electricity and ammonia absorption combined power and cooling into the combined circle system of the solar and biomass, and analysis the performance of system.The combined circle system of the solar energy and biomass fully uses renewable clean energy, the superior environmental protection and energy saving is self-evident. In short, this system is a very promising direction, the related researches also have an important significance to the sustainable development of energy and environment.