分布式供能系统中生物质气内燃机性能分析.docx

Abstract
Energy shortage is one of the important factors of restricting the social and economic development. The key to solve the energy shortage is to develop the new energy technology and achieve the efficient use of it. This paper uses the biomass gas as fuel of engine to research the performance of engine and optimize the engine, achieving the purpose of using the new energy and improving energy utilization.
First, the research bases on a natural gas engine. The engine model is established
and validated. bustion performance of five different gasification conditions’ biomass gas is researched when the engine uses biomass gas. And bustion performance of biomass gas is proved to be optimal when the equivalence ratio for biomass gasification is . The bustion rule and performance curve are gotten. The differences of power performance, fuel economy and emission characteristics are found paring the biomass gas engine and natural gas engine. Then, this paper analyses the best structure and operation parameters of biomass gas engine with different loads bining the engine with the distributed energy system. The results show that under the working condition of 1500 r/min the integrated performance of biomass gas engine is optimal when the ignition advance angle is 38 degrees, air-fuel ratio is , compression ratio is 12. Last, this paper designs the biomass gas engine distributed energy system on the basis of the simulation parameters. At the same time, the biomass gas supply system is redesigned according to the fuel consumption. This paper also selects the generator mark according to power, and designs distributed energy waste heat exchanger according to engine exhaust gas temperature and mass flow rate. All these lay the foundation for the further study.
Keywords: distributed energy, biomass gas, engine, structure parameters, operation parameters
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