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Increasing the solar share in combined cycles through thermochemical energy storage.
- Source :
-
Energy Conversion & Management . Feb2021, Vol. 229, pN.PAG-N.PAG. 1p. - Publication Year :
- 2021
-
Abstract
- • A fully novel High Temperature Storage Solar Combined Cycle (HTSSCC) is proposed. • Thermochemical energy storage allows a 24 h operation without fuel input. • The solar share in the solar combined cycle is highly enhanced (ideally up to 100%). • The base case analysed leads to a net solar-to-electric efficiency of 44.5%. The integration of Concentrating Solar Power (CSP) in combined cycles is a subjects of increasing attention. Combined cycles require high temperature at the gas turbine inlet (typically over 1000 °C), which hinders plant operation in the absence of direct solar radiation using currently commercial storage technologies based on molten salts (with a temperature limit around 600 °C). Thus, solar power share in current Integrated Solar Combined Cycles (ISCC) is typically lower than 20%, while most of the thermal power required is provided by natural gas. The present manuscript proposes the integration in combined cycles of a Thermochemical Energy Storage (TCES) system based on the Calcium-Looping process, which can release the stored energy at temperatures above 1000 °C. The storage charging step uses the heat provided by a CO 2 stream previously heated in a high-temperature solar receiver. The configuration of the solar receiver-calciner is fundamental to determine the amount of storable energy. Results from the conceptual model simulation predict overall plant efficiencies above 45% (excluding solar side losses), suggesting a high potential for the development of this novel integration that would allow enhancing the solar share in combined cycles. [ABSTRACT FROM AUTHOR]
- Subjects :
- *ENERGY storage
*SOLAR cycle
*SOLAR radiation
*SOLAR energy
*SOLAR receivers
Subjects
Details
- Language :
- English
- ISSN :
- 01968904
- Volume :
- 229
- Database :
- Academic Search Index
- Journal :
- Energy Conversion & Management
- Publication Type :
- Academic Journal
- Accession number :
- 148284754
- Full Text :
- https://doi.org/10.1016/j.enconman.2020.113730