MODEL-BASED SIMULATION, ANALYSIS, AND PROTOTYPING FOR FUTURE LIQUID AIR ENERGY STORAGE SYSTEMS
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Authors
Bailey, Nicholas A.
Subjects
LAES
liquid air energy storage
microgrid
renewable energy
Linde-Hampson
Stirling cycle
liquid air energy storage
microgrid
renewable energy
Linde-Hampson
Stirling cycle
Advisors
Paulo, Eugene P.
Pollman, Anthony G.
Date of Issue
2019-12
Date
Publisher
Monterey, CA; Naval Postgraduate School
Language
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 heated and expanded to provide power to the microgrid. Using a modeling and simulation approach, the requirements for a Linde-Hampson based LAES system satisfied a building scale (5 kW) demand for five hours. Functional requirements for the system are established and most significant factors are examined. Compressor pressure and flow are identified as the most important towards liquid yield, and components to realize a complete system are selected. Next, a dual-Stirling engine-based LAES system focusing on the energy generation subsystem is explored. Experimental data were gathered from a prototype that was built and compared against an ideal Stirling cycle. Energy efficiency was calculated, and improvements were suggested. Both LAES systems presented are coupled with Girouard, Pollman, and Hernandez’s LAES research into a supply-based Linde-Hampson system and the liquid generation subsystem of a dual-Stirling engine prototype to form two complete LAES systems.
Type
Thesis
Description
Series/Report No
Department
Systems Engineering (SE)
Organization
Identifiers
NPS Report Number
Sponsors
Funder
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Distribution Statement
Approved for public release; distribution is unlimited.
Rights
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.