低熱值燃料於微型渦輪引擎之實驗分析

Abstract

利用已開發完成的燃油氣微型渦輪引擎作為載具，渦輪轉子直徑大小為4公分，將此以燃油為燃料的系統重新改裝成為適合低熱值生質能氣體燃料之微渦輪引擎燃燒系統（MGT）並解決潤滑管路及啟動之問題，並使用不同濃度之甲烷燃料模擬低熱值燃料，並擷取燃料壓力、質量流量、引擎轉速等及MGT系統重要溫度，經過數據分析後，再根據此燃燒動力系統之性能來進行後段發電系統的設計與建立，從實驗數據得出使用60%甲烷混合40%二氧化碳之低熱值燃料在可達最高轉速47,500 RPM 下無法有效發電，在使用90%甲烷混合10%二氧化碳在渦輪引擎轉速85,000 RPM下可得 170 W之發電量，最後依照實驗數據建立完成一低熱值生質能汽電共生系統的建立與實場示範操作，並使其系統穩定好操作以便利用，作為未來分散發電的選擇之一。

Based on the low-heating-value fuel obtained from the bio-process from marsh gas by removing H2S, it develops a micro gas turbine (MGT) with turbine wheel diameter 40mm by modifying the system from a liquid-fuel burning gas turbine system into a gas burning one to generate the combustion power, which is used to drive a generator to produce the electricity. It is a co-generation process, which can be one of the potential candidates for the distributed power supply systems. In the experiment, the pressure and the volume flow rate of fuel, rotational speed of turbine and the temperatures of important parts of MGT have acquired. According to the data, the better generator can be chosen, and the output by using 90% CH4 with 10% CO2 reaches about 170W at 85,000 rpm. When low-heating-value fuel of 60% CH4 was applied, the power output was extremely low. Also, this research would be compared to gasoline to ensure its practical utilization. Finally, the MGT system also intends to evaluate the possibilities of the system integration with other renewable energy resources, such as the wind and solar powers.