光伏光热双源热泵储电系统特性模拟研究
Simulation study on characteristics of photovoltaic/thermal combined dual-source heat pump with electrical energy storage system
摘要：
考虑到住宅用能时间与发电时间不匹配,为有效利用太阳能,在光伏光热双源热泵系统的基础上,增设了铅酸蓄电池作为储电装置,构成了光伏光热双源热泵储电系统。以上海某住宅为例,模拟研究了该系统在供暖季的性能,并与常规光伏光热双源热泵系统进行了比较。采用太阳能保证率和自消纳率2个指标对能源利用进行了评价。与常规系统相比,该系统的总电网补电量降低了67.03%,减少了对电网的依赖;并且该系统应用于居住建筑的平均太阳能保证率和自消纳率分别为0.68和0.84,较常规系统分别提高了28.31%和31.25%,有效提高了供暖季太阳能利用效率。
Abstract：
Considering the mismatch between residential energy use time and power generation time, in order to effectively utilize solar energy, this study integrates a lead-acid battery as an energy storage device into a photovoltaic/thermal combined dual-source heat pump (PV/T-DSHP) system, forming a PV/T-DSHP with electrical energy storage (EES) system. Taking a residence in Shanghai as a case, the performance of this system during the heating season is simulated and compared with that of a conventional PV/T-DSHP system. The evaluation of energy utilization is conducted using two indicators: solar fraction and self-consumption ratio. Compared with the conventional PV/T-DSHP system, the PV/T-DSHP-EES system reduces total grid electricity supplementation by 67.03%, decreasing dependence on the grid. Additionally, the average solar fraction and self-consumption ratio of the system applied to the residential building are 0.68 and 0.84, respectively, representing increases of 28.31% and 31.25% compared with the conventional PV/T-DSHP system, effectively enhancing solar energy utilization efficiency during the heating season.
Keywords:photovoltaic/thermal; dual-source heat pump; electrical energy storage system; system characteristic; solar energy utilization; solar fraction; self-consumption ratio