Air separation with cryogenic energy storage: Optimal scheduling considering electric energy and reserve markets

The concept of cryogenic energy storage (CES) is to store energy in the form of liquid gas and vaporize it when needed to drive a turbine. Although CES on an industrial scale is a relatively new approach, the technology is well known and essentially part of any air separation unit that utilizes cryo...

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Veröffentlicht in:AIChE journal Jg. 61; H. 5; S. 1547 - 1558
Hauptverfasser: Zhang, Qi, Grossmann, Ignacio E., Heuberger, Clara F., Sundaramoorthy, Arul, Pinto, Jose M.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York Blackwell Publishing Ltd 01.05.2015
American Institute of Chemical Engineers
Schlagworte:
Air
Air separation
cryogenic energy storage
Economics
Electric power
electricity markets
Energy
Energy storage
Gas turbines
Linear programming
Low temperature physics
Markets
mixed-integer linear programming
Optimization
Power plants
production scheduling
Reserves
robust optimization
Scheduling
Turbines
ISSN:0001-1541, 1547-5905
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Zusammenfassung:The concept of cryogenic energy storage (CES) is to store energy in the form of liquid gas and vaporize it when needed to drive a turbine. Although CES on an industrial scale is a relatively new approach, the technology is well known and essentially part of any air separation unit that utilizes cryogenic separation. In this work, the operational benefits of adding CES to an existing air separation plant are assessed. Three new potential opportunities are investigated: (1) increasing the plant's flexibility for load shifting, (2) storing purchased energy and selling it back to the market during higher‐price periods, and (3) creating additional revenue by providing operating reserve capacity. A mixed‐integer linear programming scheduling model is developed and a robust optimization approach is applied to model the uncertainty in reserve demand. The proposed model is applied to an industrial case study, which shows significant potential economic benefits. © 2015 American Institute of Chemical Engineers AIChE J, 61: 1547–1558, 2015
Bibliographie:National Science Foundation - No. 1159443
Praxair
istex:4B69C348421147FE6904C8D96190441A63C89CEF
ark:/67375/WNG-45373F1H-5
ArticleID:AIC14730
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ISSN:0001-1541
1547-5905
DOI:10.1002/aic.14730