首页|Efficiency Improvement Techniques For Liquid Piston based Ocean Compressed Air Energy Storage

Efficiency Improvement Techniques For Liquid Piston based Ocean Compressed Air Energy Storage

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Renewable energy resources require energy storage system for their optimal utilization。 Ocean compressed air energy storage (OCAES) is a promising storage system for a utility-scale energy storage。 An energy-efficient OCAES system can be built using isothermal liquid piston compressor/expander。 Effect of various heat transfer enhancement techniques in the liquid piston on the end-to-end efficiency of OCAES is analyzed in this study。 Heat transfer enhancement techniques like optimal trajectories， use of hollow spheres， spray cooling and porous media inserts are considered。 It is observed that optimal trajectories can improve the efficiency of liquid piston based OCAES by about 5% over the base liquid piston based OCAES。 Use of hollow spheres can improve by about 9%。 Spray cooling and porous media indicate about 17% increase in end-to-end efficiency。 This analysis indicates that liquid piston based OCAES can achieve significantly higher end-to-end efficiency over existing compressed air energy storage plants with the use of heat transfer enhancement technique in the liquid piston。

Ocean energyUnderwater energy storageCompressed airHeat transfer enhancementEnergy efficiency

Vikram C Patil、Kishore Ranganath R.、Paul Ro

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North Carolina State University, Raleigh, NC, USA

Annual TechConnect World Innovation Conference & Expo;Annual Nanotech Conference & Expo;National SBIR/STTR Conference

Washington(GB)

TechConnect Briefs 2017: Materials for Energy, Efficiency and Sustainability

136-139

2017