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本研究以某公司30 k W微型燃机为对象,利用仿真模拟的方法,研究其以稻草气、棉柴气、木片气和沼气4种生物质气为燃料的可行性,计算燃用不同生物质气时微型燃机的安全运行工况。研究表明:该燃机无法燃用热值较低的稻草气与棉柴气,因其无法同时满足压气机喘振裕度及透平入口温度的要求;燃用热值较高的木片气和沼气时,微型燃机可以安全运行,木片气可以在压比为3.247~3.251、功率为18.13~32 k W范围内安全运行,沼气可以在压比为3.203~3.207、功率为15.9~32 k W范围内安全运行。针对微型燃机无法燃用低热值燃料这一问题,提出改进压气机方案,该方案增大了燃用低热值燃料时压气机的喘振裕度及透平入口温度,使其能够安全运行。
In this study, a 30 kW micro-gas turbine was used as a research object, and the feasibility of using four kinds of biomass gas as straw gas, cotton wood gas, wood flake gas and biogas as fuel was simulated by simulation method. Safe operation of micro gas turbine with material gas. The results show that the gas turbine can not burn straw gas and cottonwood gas with low calorific value because it can not satisfy both the compressor surge margin and the turbine inlet temperature at the same time. When the biogas is used, the micro gas turbine can run safely. The wood gas can operate safely with a pressure ratio of 3.247-3.251 and a power of 18.13- 32kW. The biogas can operate at a pressure ratio of 3.203-3.207 and a power of 15.9-32kW Safe operation within the scope. Aiming at the problem that the micro gas turbine can not burn the low calorific value fuel, an improved compressor solution is proposed, which increases the surge margin and the turbine inlet temperature of the compressor when burning low calorific value fuel so that it can operate safely.