Hirohisa Aki

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The U.S. Department of Energy has launched the commercial building initiative (CBI) in pursuit of its research goal of achieving zero-net-energy commercial buildings (ZNEB), i.e. ones that produce as much energy as they use. Its objective is to make these buildings marketable by 2025 such that they minimize their energy use through cutting-edge,(More)
Introduction of an integrated energy service system in an urban area is assumed. An energy supply plant is installed in the area to provide integrated energy service. It supplies electricity, gas, cooling, and heating to consumers. To consider CO2 emission constraint in the area, analyses of energy pricing, economic impact on energy consumers, and operation(More)
This paper focuses on the development of the model for optimal management and operation of hybrid stand-alone wind-solar energy generation system. The proposed hybrid system consists of wind turbine with variable speed permanent-magnet synchronous generator, solar system with mechanical tracker and a system for storing energy during wind speed, solar output(More)
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