COMPRESSED AIR ENERGY STORAGE SYSTEMS for Stand-Alone Off-Grid by mercy2beans117



COMPRESSED AIR ENERGY STORAGE SYSTEMS for Stand-Alone Off-Grid Photovoltaic Modules
                                                                   Dominique Villela, Sriram Ashok, Krishna Muralidharan, Pierre Deymier

Objective                                                        The PROTOTYPE: An Isothermal Single-Stage HYBRID Compressor/Motor
Engineer small-scale compressed-air modules as energy-
storage devices in conjunction with stand-alone, photo-voltaic
(PV) systems, for off-grid power delivery.

Key Specifications
 Low-cost, and low-maintenance
 Environmentally-benign, high-efficiency
 Isothermal compression system.
 Off-grid alternative to the large-scale compressed-air
   powered energy plants.
 Customizable to power residential or commercial units          Design Features
   and household appliances.                                      Hybrid compressor/motor single-stage design
                                                                    Minimal energy loss by using low friction teflon parts
Advantages of an Isothermal Compression System
                                                                    Optimized stroke speed (~60 rpm)
                                                                    Electronic valving and air regulator
                                                                    Rack and pinion drive for smooth motion of the piston
                                               adiabatic          Effective cooling system for isothermal
                adiabatic                                             compression/expansion                                   Ongoing Work
                                                                   Maximize efficiency by operating at near quasi-static      State of the art computational modeling and optimization methods for
                                                                    conditions                                                  guiding design of prototype, materials selection, reliability, safety and risk
                                                                   Multiple fin-structure to promote thermal conduction        analysis
                                                                                                                              Cost effective storage tank analysis and scalability analysis
                                                                  Liquid ‘Piston’
                                                                                                                              Lightweight transportable framing
                                                                   Reduction in dead volume
                                                                   Decrease in friction
                                                                                                                              Future Research Direction
                                                                                                                               Efficient energy recovery from compressed-air
Schematic Representation                                                                                                       Designing customizable units to meet needs of user
    of the Prototype                                                                                                           Materials selection (testing fluid with desirable thermal, viscous
                                                                                                                                and chemical properties)

                                                                                                                              Special Thanks:
                                                                                                                               • George Frantziskonis (CEEM, Eusthatia-Industrial partner)
                                                                                                                               • C. Deymier, Butametal sa. France
                                                                                                                               • Ryan Willwater, URIC, University of Arizona

                                                                                                                                                     School of Sustainable
                                                                                                                                                       Engineered Systems

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