寒冷地における住宅用給湯設備の効率性に関する研究

摘要

本研究では、寒冷地の戸建住宅における給湯設備を高効率で利用rnするために、GE-CGS、潜熱回収型ガス給湯器、CO_2ヒートポンプ給湯rn機の3機種を対象に実測調査を行った。そして、エネルギー効率をrn算出し、給湯設備毎に効率性の検討を行った。%The authors investigated how to use three kinds of hot water supply systems which were condensing type gas water heater systems, CO_2 heat pump water heater systems and residential gas engine co-generation systems (GE-CGS) in four detached houses of Nagano prefecture. GE-CGS was installed in house A and house B. Condensing type gas water heater systems were installed in house B and house C. CO_2 heat pump water heater systems were installed in house C and house D. We analyzed the energy efficiency of these systems. As a result, GE-CGS of house A was the highest in the annual energy efficiency, and it followed that CO_2 heat pump water heater system of house D was the lowest.