Modeling and Simulation Approach to Support Component Selection for Demand-Based Building-Scale LAES System
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Authors
Bailey, Nicholas A.
Pollman, Anthony G.
Paulo, Eugene
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Date of Issue
2019
Date
2019
Publisher
MORS
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Abstract
Islanded, renewably powered microgrids require energy storage or emergency generation to overcome intermittency. Batteries and fossil fuel generators have traditionally filled these roles. However, liquid air energy storage (LAES) is a promising alternative. Using power in excess of immediate demand, a LAES system can liquefy and cryogenically store ambient air. When renewable generation abates, the liquid air can be expanded through a turbine to provide power to the microgrid. Using a modeling and simulation approach, this paper explores the requirements for a Linde-Hampson based LAES system to satisfy a building scale (5 kW) demand for five hours. Analysis is used to assess round trip efficiencies, as a function of pressure ratios, number of compression or expansion stages, and other physical component decisions or configurations. Finally, the initial design and preliminary commercial component selection of a LAES system based on a demand requirement is presented. This effort, coupled with Girouard’s supply side analysis, effectively maps the extremes of the feasibility region. Future work will include construction at the Naval Postgraduate School’s microgrid test facility.
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Conference Paper
Description
2019 MORS Symposium – Colorado Springs, CO
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Format
11 p.
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This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.