基于虚拟储能的建筑可再生能源系统设计与优化

DESIGN AND OPTIMIZATION OF BUILDING INTEGRATED RENEWABLE ENERGY SYSTEM BASED ON VIRTUAL ENERGY STORAGE

以建筑可再生能源系统为研究对象,设计太阳能光伏光热互补的热电联产系统,实现太阳能向电能和热能的梯级、高效转换,且太阳能供热效率与总效率分别达到49%和79%。在此基础上,系统采用虚拟储能方法,主动调控建筑热负荷,降低储热装置的容量,使得典型日的储热量占建筑全天累计热负荷的比例由25.9%降至11.0%;提高太阳能供热量与建筑热负荷的匹配程度,使得典型日本址供能满足负荷占比由74%升至90%,本址供热自消费占比由74%升至89%。

Taking the building integrated renewable energy system as the research project,a solar photovoltaic/thermal hybrid system for heat and power cogeneration are designed and optimized.Owing to the cascade conversion of solar energy to electric energy and thermal energy,the solar heat efficiency and total efficiency reach 49%and 79%,respectively.On this basis,virtual energy storage of the building is applied via active load control to reduce the capacity of thermal energy storage devices.Consequently,the proportion of stored thermal energy to building heat demand throughout the day decreases from 25.9%(without virtual energy storage)to 11.0%(with virtual energy storage).Besides,the matching degree between solar heat supply and building heat load is improved.Namely,on-site energy fraction increases from 74%to 90%,and on-site energy matching increases from 74%to 89%.