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Title: Thermodynamic performance and cost optimization of a novel hybrid thermal-compressed air energy storage system design

Abstract

Compressed Air Energy Storage (CAES) can potentially allow renewable energy sources to meet electricity demands as reliably as coal-fired power plants. However, conventional CAES systems rely on the combustion of natural gas, require large storage volumes, and operate at high pressures, which possess inherent problems such as high costs, strict geological locations, and the production of greenhouse gas emissions. A novel and patented hybrid thermal-compressed air energy storage (HT-CAES) design is presented which allows a portion of the available energy, from the grid or renewable sources, to operate a compressor and the remainder to be converted and stored in the form of heat, through joule heating in a sensible thermal storage medium. The HT-CAES design incudes a turbocharger unit that provides supplementary mass flow rate alongside the air storage. The hybrid design and the addition of a turbocharger have the beneficial effect of mitigating the shortcomings of conventional CAES systems and its derivatives by eliminating combustion emissions and reducing storage volumes, operating pressures, and costs. Storage efficiency and cost are the two key factors, which upon integration with renewable energies would allow the sources to operate as independent forms of sustainable energy. The potential of the HT-CAES design is illustratedmore » through a thermodynamic optimization study, which outlines key variables that have a major impact on the performance and economics of the storage system. The optimization analysis quantifies the required distribution of energy between thermal and compressed air energy storage, for maximum efficiency, and for minimum cost. This study provides a roundtrip energy and exergy efficiency map of the storage system and illustrates a trade off that exists between its capital cost and performance.« less

Authors:
 [1];  [2];  [2]
  1. National Renewable Energy Lab. (NREL), Golden, CO (United States)
  2. Univ. of California, Los Angeles, CA (United States)
Publication Date:
Research Org.:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org.:
USDOE Office of Energy Efficiency and Renewable Energy (EERE)
OSTI Identifier:
1441174
Report Number(s):
NREL/JA-5500-71685
Journal ID: ISSN 2352-152X
Grant/Contract Number:  
AC36-08GO28308
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Journal of Energy Storage
Additional Journal Information:
Journal Volume: 18; Journal Issue: C; Journal ID: ISSN 2352-152X
Publisher:
Elsevier
Country of Publication:
United States
Language:
English
Subject:
25 ENERGY STORAGE; air energy storage; storage efficiency; thermodynamic optimization

Citation Formats

Houssainy, Sammy, Janbozorgi, Mohammad, and Kavehpour, Pirouz. Thermodynamic performance and cost optimization of a novel hybrid thermal-compressed air energy storage system design. United States: N. p., 2018. Web. doi:10.1016/j.est.2018.05.004.
Houssainy, Sammy, Janbozorgi, Mohammad, & Kavehpour, Pirouz. Thermodynamic performance and cost optimization of a novel hybrid thermal-compressed air energy storage system design. United States. doi:10.1016/j.est.2018.05.004.
Houssainy, Sammy, Janbozorgi, Mohammad, and Kavehpour, Pirouz. Fri . "Thermodynamic performance and cost optimization of a novel hybrid thermal-compressed air energy storage system design". United States. doi:10.1016/j.est.2018.05.004.
@article{osti_1441174,
title = {Thermodynamic performance and cost optimization of a novel hybrid thermal-compressed air energy storage system design},
author = {Houssainy, Sammy and Janbozorgi, Mohammad and Kavehpour, Pirouz},
abstractNote = {Compressed Air Energy Storage (CAES) can potentially allow renewable energy sources to meet electricity demands as reliably as coal-fired power plants. However, conventional CAES systems rely on the combustion of natural gas, require large storage volumes, and operate at high pressures, which possess inherent problems such as high costs, strict geological locations, and the production of greenhouse gas emissions. A novel and patented hybrid thermal-compressed air energy storage (HT-CAES) design is presented which allows a portion of the available energy, from the grid or renewable sources, to operate a compressor and the remainder to be converted and stored in the form of heat, through joule heating in a sensible thermal storage medium. The HT-CAES design incudes a turbocharger unit that provides supplementary mass flow rate alongside the air storage. The hybrid design and the addition of a turbocharger have the beneficial effect of mitigating the shortcomings of conventional CAES systems and its derivatives by eliminating combustion emissions and reducing storage volumes, operating pressures, and costs. Storage efficiency and cost are the two key factors, which upon integration with renewable energies would allow the sources to operate as independent forms of sustainable energy. The potential of the HT-CAES design is illustrated through a thermodynamic optimization study, which outlines key variables that have a major impact on the performance and economics of the storage system. The optimization analysis quantifies the required distribution of energy between thermal and compressed air energy storage, for maximum efficiency, and for minimum cost. This study provides a roundtrip energy and exergy efficiency map of the storage system and illustrates a trade off that exists between its capital cost and performance.},
doi = {10.1016/j.est.2018.05.004},
journal = {Journal of Energy Storage},
number = C,
volume = 18,
place = {United States},
year = {Fri May 11 00:00:00 EDT 2018},
month = {Fri May 11 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on May 11, 2019
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