Seasonal Energy Flexibility Through Integration of Liquid Sorption Storage in Buildings

Energies

Benjamin Fumey¹  Luca Baldini¹ 

[1] Empa–Swiss Federal Laboratories for Materials Science and Technology, 8600 Dubendorf, Switzerland;

关键词: long-term thermal energy storage;    seasonal thermal energy storage;    thermochemical energy storage;    liquid sorption storage;    power-to-heat;    seasonal energy flexibility;   

DOI  :  10.3390/en13112944

来源: DOAJ

【 摘 要 】

The article estimates energy flexibility provided to the electricity grid by integration of long-term thermal energy storage in buildings. To this end, a liquid sorption storage combined with a compression heat pump is studied for a single-family home. This combination acts as a double-stage heat pump comprised of a thermal and an electrical stage. It lowers the temperature lift to be overcome by the electrical heat pump and thus increases its coefficient of performance. A simplified model is used to quantify seasonal energy flexibility by means of electric load shifting evaluated with a monthly resolution. Results are presented for unlimited and limited storage capacity leading to a total seasonal electric load shift of 631.8 kWh/a and 181.7 kWh/a, respectively. This shift, referred to as virtual battery effect, provided through long-term thermal energy storage is large compared to typical electric battery capacities installed in buildings. This highlights the significance of building-integrated long-term thermal energy storage for provision of energy flexibility to the electricity grid and hence for the integration of renewables in our energy system.

【 授权许可】

Unknown