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Design of a compressed air energy storage system for hydrostatic wind turbines

1 Department of Mechanical Engineering, Purdue School of Engineering and Technology Indianapolis, Indiana, USA
2 Energy Systems and Power Electronics Lab, Purdue School of Engineering and Technology, Indianapolis, Indiana, USA

Topical Section: Energy Harvest and Storage

Integration of Compressed Air Energy Storage (CAES) system with a wind turbine is critical in optimally harvesting wind energy given the fluctuating nature of power demands. Here we consider the design of a CAES for a wind turbine with hydrostatic powertrain. The design parameters of the CAES are determined based on simulation of the integrated system model for a combination of these parameter values, namely the compression ratios of the air compressors and the expanders and the air tank size. The results of the simulations were used to choose the best design parameters, which would produce the best stable performance through increased energy output of the integrated CAES and wind turbine based on the intermittent wind profile. Simulation results for a 600 kW rated power wind turbine with integrated CAES indicate that increasing the tank size and compression ratio will improve the overall power quality through increased energy output up to a limit beyond which the power quality exhibits only marginal improvement.
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Keywords CAES; hydrostatic drive wind turbine; annual energy yield; design optimization; compression ratio; tank size

Citation: Ammar E. Ali, Nicholas C. Libardi, Sohel Anwar, Afshin Izadian. Design of a compressed air energy storage system for hydrostatic wind turbines. AIMS Energy, 2018, 6(2): 229-244. doi: 10.3934/energy.2018.2.229


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