With the increasing application of CHP and an industry transition to distributed energy, it is necessary to make a comprehensive economic analysis and comparison of the entire lifetime of CHP from the net present value (NPV), payback period, and cost-saving ratio (CSR). Five systems, including micro-CHP, gas boiler (GB), air-source heat pump (ASHP), domestic gas-fired heater and domestic electric hot water-heater, are simulated. First, this paper takes annual heat use efficiency (AHUE) into account to compare the economy of each domestic hot water (DHW) system. The results show that a domestic gas-fired heater system is the most economical option in the AHUE of 31.28%. The economic influence of CHP and gas-fired heater under different AHUE are then analyzed. The results show that the DHW system based on CHP is the best when the AHUE is more than 55.35%. Finally, three different operation strategies of CHP are considered in this paper. From the perspective of annual energy cost and payback, the internal combustion-based CHP with thermal energy system (TES) is superior to the other two strategies being studied. Considering the optimal economic benefits, the CSR of the three different operation strategies is 41.3%, 69.69% and 69.77%, respectively.

中文翻译：

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集中式生活热水系统热电联产的经济评价和控制策略

随着热电联产应用的增加和向分布式能源的产业过渡，有必要从净现值（NPV），投资回收期和成本节约率（CSR）进行热电联产整个寿命的全面经济分析和比较。 ）。模拟了五个系统，包括微型热电联产，燃气锅炉（GB），空气源热泵（ASHP），家用燃气加热器和家用电热水加热器。首先，本文考虑了年度热利用效率（AHUE），以比较每个家用热水（DHW）系统的经济性。结果表明，家用燃气加热器系统是31.28％的AHUE中最经济的选择。然后分析了不同AHUE条件下CHP和燃气加热器的经济影响。结果表明，当AHUE大于55.35％时，基于CHP的DHW系统是最好的。最后，本文考虑了三种不同的热电联产运行策略。从年度能源成本和投资回收率的角度来看，基于内燃的热电联产热电联产系统（TES）优于正在研究的其他两种策略。考虑到最佳经济效益，三种不同运营策略的企业社会责任分别为41.3％，69.69％和69.77％。