Abstract:

Based on the survey of household photovoltaic demonstration project in Xinyu City of Jiangxi Province, stable investment recovery period and internal rate of return (IRR) are applied as the economic evaluation index, the energy recovery period and annual savings of standard coal as the environmental benefit evaluation index, the generation power, revenue composition and economic benefits under different circumstances, environmental benefits of 5 kW household photovoltaic system were analyzed. The results show that the yearly power generation of 5 kW household photovoltaic system is 4056.7 kWh, only 79% of the theoretical value. The system has a good economic benefit with the subsidies from the state and Jiangxi Province. The stable investment recovery period is less than 8 years, and the internal rate of return is 11.2%. Lack of subsidies from the state or Jiangxi would have a large impact on the economic benefits of investments. The photovoltaic system also has a good environmental benefit, saving 1.46 tons of standard coal each year, and the energy payback period is 5.22 years. The development of household photovoltaic needs support of national policy and appropriate promotion model.

Key words: household photovoltaic, economic benefits, environmental benefits, prospect

摘要：

对江西省新余市家庭光伏示范工程进行调研, 以投资回收期和内部收益率(IRR)作为经济性评价指标, 以能量回收期和年节约标准煤作为环境效益评价指标, 分析5 kW光伏系统的发电量、收益组成、环境效益以及不同补贴模式下的经济效益。结果表明, 江西省5 kW光伏发电系统的平均年发电量为4056.7度, 只有理论值的 79%。在既有国家补贴又有江西省补贴的情况下, 投资回收期平均不到8年, 平均内部收益率为11.2%, 家庭式光伏发电具有良好的经济效益, 缺少国家补贴或者江西省的补贴都会对投资的经济效益产生较大的影响。光伏发电系统还具有良好的节能和环保效益, 能量投资回收期为5.22年, 年节约标准煤1.46吨。目前家庭光伏的发展还需要国家政策的支持和合适的推广模式。

关键词: 家庭光伏发电, 经济效益, 环境效益, 发展