西北村鎮太陽能與沼氣聯合供暖系統優化配置研究
Study on optimal configuration of solar and biogas combined heating system in northwest rural areas
摘要：
針對西北村鎮地區太陽能與沼氣聯合供暖系統設備容量設計問題，建立了以熱量平準化成本最小為目標的太陽能與沼氣聯合供暖系統容量匹配優化模型，利用MATLAB/Simulink平臺編寫了聯合系統模擬仿真程序，利用遺傳算法對優化模型進行了求解計算，并對優化結果進行了準確性檢驗及分析。選取西北地區5個典型城市進行了優化模擬，分析了不同地區氣候資源差異對聯合系統容量配置優化結果的影響。研究結果表明：優化后的熱量平準化成本相比未優化時降低了29.4%，同時太陽能子系統的能效及系統總能效得到了提升；對于太陽能資源條件較好的酒泉、西寧和銀川地區，在發酵原料充足的條件下，可再生能源保證率達到了80%以上。
Abstract：
In view of the configuration design of solar and biogas combined heating system in northwest rural areas, this study establishes an optimization model for capacity configuration of solar and biogas combined heating system with the objective of minimizing the levelized cost of heat (LCOH). The simulation program of the combined heating system is compiled using MATLAB/Simulink platform. The optimization model is solved by the genetic algorithm, and the accuracy of the optimization results is tested and analysed. Five typical cities in northwest areas are selected for optimization simulation, and the influence of climate resource difference in different regions on the optimization results of the combined system capacity configuration is analysed. The results show that the LCOH after optimization is 29.4% lower than that before optimization, and the energy efficiency of the solar subsystem and the total energy efficiency of the system are also improved. For Jiuquan, Xining and Yinchuan regions with rich solar energy resources, when biogas fermentation raw materials are sufficient, the renewable energy fraction of the system reaches more than 80%.
Keywords:solarenergy;biogas;combinedheating;ruralarea;optimaldesign;levelizedcostofheat;renewableenergy