Evaluation of Independent Supply Sustainability Performance in Collective Housing with Distributed Energy Systems

DOI: 10.5176/2251-189X_SEES14.25

Authors: Noriyuki Takeshita, Atushi Akisawa, Yuki Ueda

Abstract:

This research aims to clarify the optimum energy technology composition to allow collective housing to independently maintain its electricity and heat supply in emergencies where there is no external electricity and heat supply. The author consider a collective housing unit composed of 100 households with a distributed energy system comprised of solar energy technology, energy storage technology, and cogeneration. The energy technology composition is optimized by using the annual operating cost as the objective function and energy-sustained days as the constraint condition. As a result, the author find that four energy-sustained days can be achieved through a 10{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465} increase in cost compared to a conventional case that does not use energy technology. Ensuring more than five energy-sustained days requires the large-scale deployment of rechargeable batteries because of floor heating in winter; however, enhancing the insulation of buildings can reduce the necessary cost by up to 40{6e6090cdd558c53a8bc18225ef4499fead9160abd3419ad4f137e902b483c465}.

Keywords: energy supply outage; cogeneration; solar energy; energy-sustained days