Combined heat and power

District energy systems provide commercial and residential space heating, air conditioning, domestic hot water, steam, and industrial process energy, as well as sometimes co-generating electricity in systems. Though the district energy system is usually more economical and energy-efficient than individual heating and cooling systems, it is also much more complicated system.

This study aims to reveal the advantages of district heating and cooling system (DHC) in energy efficiency as an urban energy system in the future. In this study, an existing absorption-chiller-and-boilertype DHC plant, which utilizes large-scale combined heat and power (CHP), is chosen for a case study. We evaluate the energy-saving potential of the plant in the future by a simulation model.

To achieve the Kyoto Protocol target, additional measures for reducing GHGs from the building sectoris a strong requirement in Japan. While this situation, building occupants are eager to secure asufficient energy supply in terms of developing business and living continuity plan (BLCP).