事務所ビルにおける太陽熱冷暖房システムの実証試験: 冷暖房運転の解析と年間性能評価

摘要

Effective utilization of solar thermal energy is essential for reducing CO_2 emission caused by the Heating, Ventilation, and Conditioning system of a building. A solar-assisted heating and cooling system was installed in an office building in Mie prefecture in December 2009. The total floor area of the building is 2,400 m~2, and the system consists of a solar collector (110 m~2), thermal storage tank (4.9 m3), and triple-effect absorption machine (527 kW cooling, 290 kW heating). Examination of the system behavior and performance has been conducted since January 2010.rnThe results are summarized as follows.rn1) The solar fraction is 16% during the cooling period and 8% during the heating period.rn2) The gas reduction rates are 11% and 9% for the cooling and heating periods respectively.rn3) The system-COP (primary energy base) for a system operated with solar thermal energy and gas is 10% higher than that for a system operated with gas only.rn4) It is possible to use the collected hot water at around 65℃ as a heat source for driving the absorption chiller.%本論文では、太陽熱冷暖房システムを実物件に導入し、各機器やシステム全体での運転解析と年間性能評価を行った結果を報告する。ここで、太陽熱温水は排熱投入型吸収冷温水機の再生器に供給され冷熱製造駆動熱として利用されている。集熱器系統のシステムCOP（一次エネルギー基準）は冷房期間で26、暖房期間で22と非常に高く、太陽熱依存率（入力側）は、冷房期間で16%、暖房期間で9%であった。さらに、太陽熱を利用しない場合と比較したガス削減率は冷房期間で11%、暖房期間で9%を達成できた。