Describing Scenarios of Introducing Highly-efficient Gas Cogeneration Systems to Next-generation Apartment Buildings

Toward realizing a low-carbon society as well as ensuring energy security, there is an urgent need to describe scenarios for future energy systems. A cogeneration system (CGS) is one of key technologies and it is, in particular, promising for apartment buildings because of its high efficiency. This paper describes a scenario of introducing a CGS to apartment buildings in order to analyze the effect of this system using exergy as an evaluation indicator. Results show that dominant exergy losses of a CGS arise in combustor and radiator. Compared with the current energy system, a CGS has a potential of reducing energy consumption by introducing a desiccant air conditioner instead of a conventional air conditioner.