Efficient and flexible thermal-integrated pumped thermal energy storage through composition adjustment

Autor: Xiaocun Sun, Lingfeng Shi, Meiyan Zhang, Hua Tian, Peng Hu, Gang Pei, Gequn Shu
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Carbon Neutrality, Vol 3, Iss 1, Pp 1-22 (2024)
Druh dokumentu: article
ISSN: 2788-8614
2731-3948
DOI: 10.1007/s43979-024-00085-9
Popis: Abstract Thermal-integrated pumped thermal electricity storage (TI-PTES) could realize efficient energy storage for fluctuating and intermittent renewable energy. However, the boundary conditions of TI-PTES may frequently change with the variation of times and seasons, which causes a tremendous deterioration to the operating performance. To realize efficient and flexible energy storage in operating conditions, a novel composition-adjustable TI-PTES is proposed, and the operating performance is investigated and compared with composition-fixed TI-PTES. Simulation results show that, compared to composition-fixed TI-PTES, the energy storage efficiency of TI-PTES could be enhanced by the absolute value of 4.4–18.3% by introducing composition adjustment method under various boundary conditions. Besides, tuning sub-system composition could simultaneously adjust the capacities of power input, heat storage and power output, realizing a more flexible operating range for TI-PTES. A case study for an isolated energy community shows that composition-adjustable TI-PTES could realize 100% conversion of off-peak electric energy and reduce daily investment by 35.6% compared with composition-fixed TI-PTES.
Databáze: Directory of Open Access Journals
Externí odkaz: