标题: | 养猪场环境温度对30kW沼气涡轮发电机发电影响之实验研究 The Experimental Study for Ambient Temperature Effect on 30 kW Turbine Generator Using Biogas in a Swine Farm |
作者: | 罗晨恺 Luo, Chen-Kai 陈俊勋 Chen, Chiun-Hsun 机械工程系所 |
关键字: | 沼气发电;涡轮发电机;环境温度;经济效益;Biogas Generation;Gas Turbine Engine;Ambient Temperature;Economic Benefits |
公开日期: | 2013 |
摘要: | 本论文在台中月眉台糖养猪场测试30 kW沼气微型涡轮发电机,使用处理后之不同浓度甲烷浓度之沼气进行实验,分析不同环境温度和功率负载对发电机的性能影响。研究计画第一部分,使用实验数据并且利用Brayton cycle与组件之实际效率计算发电机之性能。结果显示发电机之发电功率为31.54 kW、热效率为25.62 %。第二部分在不同环境温度下,测试不同负载(15~30 kW)之发电机效能变化,利用量测的数据分析发电功率和热效率。结果显示当环境温度从21.8 oC上升至31.4oC,发电功率和热效率分别下降9.6%和2.9%,且在发电机未到达引擎最大转速额定功率24 kW下,甲烷质量流率从0.1284增加至0.152 kg/min,显示沼气浓度不影响发电功率。第三部分,与国外研究之实验数据作比较,探讨不同燃料对CR30之性能影响。结果显示发电机使用沼气之净输出功率高于丙烷,但是使用沼气之热效率会低于丙烷。净输出功率和热效率之最大差异分别为1.02kW和3.8%。最后,估计涡轮发电机沼气发电之经济效益,在5,000头和20,000猪只规模猪场使用涡轮发电机每年之发电量分别为165,200 kWh和826,000 kWh、减碳量分别为725吨和3,600吨。 This research carried out the 30 kW micro-gas turbine engine (CR30) experiments using biogas in a swine farm in Taichung. The experiment used different concentrations of methane in desulfurized biogas to investigate the ambient temperature and workload effects on MGT. Firstly, the theoretical calculations were analyzed by use of Brayton cycle assumption with actual component efficiencies and experimental data as inputs. The results showed that the calculated generator power output and calculated thermal efficiency are 31.54kW and 25.62%, respectively. Secondly, under various workloads (15~30kW), the ambient temperature effects on performance of MGT are investigated. When the ambient temperature increases from 21.8 oC to 31.4 oC, the net power output and thermal efficiency decrease 9.6% and 2.9%, respectively. Besides, when MGT does not reach the maximum engine speed (~96,000 rpm), the methane mass flow rate increases from 0.128 to 0.152 kg/min at 24 kW of rated power output, indicating that CH4 concentration in biogas does not affect the net power output. Thirdly, the comparisons with other researches were made for analyzing the effect by different fuels using CR30. By using biogas, it was found that the net power outputs are larger but the thermal efficiencies are lower than those by using propane. The maximum discrepancies of net power output and thermal efficiency are 1.02 kW and 3.8%, respectively. Finally, the economic benefits of MGT are estimated. The 5,000-pig and 20,000-pig swine farms can generate 165,200 kWh and 826,000 kWh of electricity per year and decrease 725 tons and 3,600 tons of CO2 per year, respectively. |
URI: | http://140.113.39.130/cdrfb3/record/nctu/#GT070151061 http://hdl.handle.net/11536/74645 |
显示于类别: | Thesis |
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