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

被引:137
作者
Zhang, Qi [1 ]
Grossmann, Ignacio E. [1 ]
Heuberger, Clara F. [2 ]
Sundaramoorthy, Arul [3 ]
Pinto, Jose M. [4 ]
机构
[1] Carnegie Mellon Univ, Dept Chem Engn, Ctr Adv Proc Decis Making, Pittsburgh, PA 15213 USA
[2] Rhein Westfal TH Aachen, Fac Mech Engn, D-52056 Aachen, Germany
[3] Praxair Inc, Business & Supply Chain Optimizat R&D, Tonawanda, NY 14150 USA
[4] Praxair Inc, Business & Supply Chain Optimizat R&D, Danbury, CT 06810 USA
基金
美国国家科学基金会;
关键词
air separation; cryogenic energy storage; production scheduling; electricity markets; mixed-integer linear programming; robust optimization; DEMAND-SIDE MANAGEMENT; PEAK-LOAD MANAGEMENT; ROBUST OPTIMIZATION; PRODUCER; PLANTS;
D O I
10.1002/aic.14730
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
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. (c) 2015 American Institute of Chemical Engineers AIChE J, 61: 1547-1558, 2015
引用
收藏
页码:1547 / 1558
页数:12
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