太陽熱温水器を併用したヒートポンプ給湯システムの省エネルギー性の評価(実験による貯湯槽モデルの妥当性検討)

摘要

Hot water demand accounts for about one-third of the household energy demand. Solar water heater and heat pump water heater are promising solutions of energy conservation for hot water supply. In the solar assisted heat pump hot water supply system, solar heated water is fed to the bottom of the water storage tank where low temperature water is stored while solar water heater is operating. In this case, the complete mixing model can express temperature distribution of hot water in the water storage tank when the model is verified with several operation conditions. In this paper, we describe about effects of hot water flow rate and inlet ports on the temperature distribution in water storage by experiment and complete mixing model is verified with experimental results. The experimental results show us that the inlet port location or flow rate of hot water do not affect the temperature distribution. Therefore, the complete mixing model can express the temperature distribution with several operating conditions.%家庭部門でのエネルギー消費のうち,給湯需要は約3分の1を占め，給湯での省エネルギーは家庭全体の省エネルギーに大きな効果を持つ.そこで再生可能エネルギーを利用する太陽熱温水器や，高効率なヒートポンプ給湯機が現在注目を集めている.