Thermo-conversion of a physical energy storage system with high-energy density: Combination of thermal energy storage and gas-steam combined cycle

Xin He, Huanran Wang, Ruixiong Li, Hao Sun, Hao Chen, ChengChen Li, Gangqiang Ge and Feiyue Tao

Energy, 2022, vol. 239, issue PE

Abstract: Electrical energy storage (EES) systems are of great significance for the widespread use of renewable energy and peak shaving of power grids. The EES system with high-energy density is one of the current research hotspots. In this paper, a novel type of EES system with high-energy density, pressurized water thermal energy storage system based on the gas-steam combined cycle (PWTES-GTCC), is presented. The proposed system could achieve the coupling of thermal energy storage (TES) and gas-steam combined cycle (GTCC) through the cracking reaction of methanol. In discharging process, methanol is cracked after absorbing thermal energy, and the cracked gas is burned to drive GTCC for generating electricity. By constructing the thermo-dynamic model of the system, performance of the system and each component are discussed in detail. The results show that the energy storage density of the proposed system reaches 36.5 kWh/m3, and it is the most sensitive to the temperature of the high-pressure water with a sensitivity coefficient of 5.7. Furthermore, the efficiency of the PWTES-GTCC is expected to reach 53.1% as the efficiency of the GTCC and the electrical efficiency of the pressurized water thermal energy storage (PWTES) achieve 55.4% and 42.6%, respectively. These three efficiencies are most sensitive to the inlet temperature of the gas turbine.

Keywords: Electrical energy storage (EES); High-energy density; Thermal energy storage (TES); Gas-steam combined cycle (GTCC); Cracking reaction of methanol (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (6)

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0360544221025731
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:energy:v:239:y:2022:i:pe:s0360544221025731

DOI: 10.1016/j.energy.2021.122325

Access Statistics for this article

Energy is currently edited by Henrik Lund and Mark J. Kaiser

More articles in Energy from Elsevier
Bibliographic data for series maintained by Catherine Liu ().