# Compressed air energy storage with waste heat export: An Alberta case study

 Title: Compressed air energy storage with waste heat export: An Alberta case study Author: Safaei, Hossein; Keith, David Note: Order does not necessarily reflect citation order of authors. Citation: Safaei, Hossein, and David W. Keith. 2014. “Compressed Air Energy Storage with Waste Heat Export: An Alberta Case Study.” Energy Conversion and Management 78 (February): 114–124. doi:10.1016/j.enconman.2013.10.043. http://dx.doi.org/10.1016/j.enconman.2013.10.043. Full Text & Related Files: 164.Safaei.Keith_.CompressedAirEnergyStor.p.pdf (1.089Mb; PDF) Abstract: Interest in compressed air energy storage (CAES) technology has been renewed driven by the need to manage variability form rapidly growing wind and solar capacity. Distributed CAES (D-CAES) design aims to improve the efficiency of conventional CAES through locating the compressor near concentrated heating loads so capturing additional revenue through sales of compression waste heat. A pipeline transports compressed air to the storage facility and expander, co-located at some distance from the compressor. The economics of CAES are strongly dependant on electricity and gas markets in which they are embedded. As a case study, we evaluated the economics of two hypothetical merchant CAES and D-CAES facilities performing energy arbitrage in Alberta, Canada using market data from 2002 to 2011. The annual profit of the D-CAES plant was $1.3 million more on average at a distance of 50 km between the heat load and air storage sites. Superior economic and environmental performance of D-CAES led to a negative abatement cost of −$40/tCO2e. We performed a suite of sensitivity analyses to evaluate the impact of size of heat load, size of air storage, ratio of expander to compressor size, and length of pipeline on the economic feasibility of D-CAES. Published Version: doi:10.1016/j.enconman.2013.10.043 Terms of Use: This article is made available under the terms and conditions applicable to Open Access Policy Articles, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#OAP Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:13489207 Downloads of this work: