太阳能保证率对热水系统经济性的影响分析

Analysis of the influence of solar energy guarantee rate on the economy of water heating system

为减小空气源热泵辅助太阳能热水系统经济性评价的偏差,基于不同月份太阳能保证率变化这一特性,并采用费用年值为评价目标,研究了太阳能保证率对空气源热泵辅助太阳能热水系统经济性的影响,并应用到实际工程案例中。结果表明:太阳能保证率是空气源热泵辅助太阳能热水系统经济评价中的一个重要参数,使用设计阶段选取的单一太阳能保证率作为参数对系统进行经济性评价时,与考虑各月份太阳能保证率变化的计算结果有较大偏差,年能耗费用偏差达9.43%,系统费用年值偏差达5.16%。提出的计算方法贴合工程实际运行情况,有利于提高空气源热泵辅助太阳能热水系统运行经济性分析的准确性,且对类似项目的设计具有一定指导意义。

In order to reduce the deviation of the economic evaluation of the air source heat pump assisted solar water heating system,based on the characteristics of the change of the solar energy guarantee rate in different months,and using the annual cost as the e-valuation target,the effect of the solar energy guarantee rate on the air source heat pump assisted solar water heating system was studied.The impact of system economics and af plied to practical engineering cases.The results show that the solar energy guarantee rate is an important parameter in the economic evaluation of the air source heat pump-assisted solar water heating system.When using the single solar energy guarantee rate selected in the design stage as a parameter to evaluate the system economy,it is different from con-sidering the change of the solar energy guarantee rate in each month.There is a large devi-ation in the calculation results of the annual energy consumption cost,and the deviation of the annual energy consumption cost is 9.43%,and the deviation of the annual value of the system cost is 5.16%.The calculation method proposed in this paper is suitable for the ac-tual operation of the project,which is beneficial to improve the accuracy of the economic analysis of the operation of the air source heat pump-assisted solar water heating system,and has certain guiding significance for the design of similar projects.