中文摘要：

建立了包括沼气发动机模型、压缩机模型、换热器模型、膨胀阀模型、发电机模型的沼气热泵复合发电系统各部件数学模型,利用该模型,研究了不同转速下的热泵系统特性、发电系统特性以及整体性能。计算和实验结果均表明,复合发电系统的沼气热泵系统最高总制热性能系数在5.0以上,并且在低转速下,制冷和制热系数较高,具有较好的部分负荷特性和节能环保效果。系统的发电电压为28.8 V,其发电能够满足自身用电需求。

英文摘要：

The mathematic model of biogas heat pump with generator was established.It included biogas engine model,compressor model,heat exchanger model,generator model and etc.Energy supply performance for biogas heat pump with a generator was studied by using the models.The results show that the system has good power generation performance,heat supply performance and refrigeration performance.When the system runs at low speed,the efficiency of energy utilization is more,and the max COP of the system is about 5.The results prove that the system is with a high actively and fully utilizing energy technology.It has good partial load characteristic and good effects for energy saving and environment protection.The voltage of the generator is 28.8V,which is enough for the system operating.