Energy storage and management system design optimization for a photovoltaic integrated low-energy building

• Published in: Energy (Oxford) 2020-01, Vol.190, p.116424, Article 116424
• Main Authors: Liu, Jia, Chen, Xi, Yang, Hongxing, Li, Yutong
• Format: Article
• Language: English
• Subjects: Aging; Battery energy storage; Carbon dioxide; Carbon dioxide emissions; Criteria; Cycles; Decision making; Design; Design optimization; Design parameters; Emissions control; Energy management; Energy storage; Environmental performance; Green buildings; Optimization; Parameter sensitivity; Photovoltaic cells; Photovoltaics; Renewable energy; Sensitivity analysis; Solar photovoltaic; Systems design; Time of use; Urban areas
• ISSN: 0360-5442; 1873-6785
• DOI: 10.1016/j.energy.2019.116424

This study aims to analyze and optimize the photovoltaic-battery energy storage (PV-BES) system installed in a low-energy building in China. A novel energy management strategy considering the battery cycling aging, grid relief and local time-of-use pricing is proposed based on TRNSYS. Both single-criterion and multi-criterion optimizations are conducted by comprehensively considering technical, economic and environmental performances of the system based on decision-making strategies including the weighted sum and minimum distance to the utopia point methods. The single-criterion optimizations achieve superior performances in the energy supply, battery storage, utility grid and whole system aspect respectively over the existing scenario of the target building. The multi-criterion optimization considering all performance indicators shows that the PV self-consumption and PV efficiency can be increased by 15.0% and 48.6% while the standard deviation of net grid power, battery cycling aging and CO2 emission can be reduced by 3.4%, 78.5% and 34.7% respectively. The significance and impact of design parameters are further quantified by both local and global sensitivity analyses. This study can provide references for the optimum energy management of PV-BES systems in low-energy buildings and guide the renewable energy and energy storage system design to achieve higher penetration of renewable applications into urban areas. •Novel energy management strategy is proposed to improve a real PV-BES system.•Technical, economic and environmental performances of the system are optimized.•Optimizations focus on energy supply, battery health, grid relief and whole system.•Sensitivity analyses are conducted to quantify the impact of design variables .