A Study on Year-Round Cooling and Heating System by a Gravity Air Cooling and Heating Unit hung at Peripheral Window-Side Ceiling : Part 2-Effect on Capacity and Air Pattern by Air Diffuser

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  • 窓側天井面部に自然対流式空気冷却・加熱ユニットを設置した年間冷暖房方式に関する研究 : 第2報-吹出し口気流の影響
  • 窓側天井面部に自然対流式空気冷却・加熱ユニットを設置した年間冷暖房方式に関する研究-2-吹出し口気流の影響
  • マドガワ テンジョウ メンブ ニ シゼン タイリュウシキ クウキ レイキャク

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Abstract

Our previous report presented the radiation effect by a gravity type cooling and heating unit hung at perimeter window-side ceiling. This report, as an extension to the former, deals with the experimental test results obtained when the same unit is operated in combination with a ceiling air diffuser. The following contents cover specific findings of the effects upon the unit's cooling/heating capacities, air flow pattern and temperature distribution by the combination. The outline of the findings is briefed as follows: 1. Re the effect upon the unit's basic capacities, a range of +20% thru -30% variations were observed depending upon the type of air diffuser applied, the air flow direction, and cooling or heating cycle. 2. No practical ill-effect was found on air distribution by the combined use of gravity unit and air diffuser. 3. The said combination did not affect the temperature distribution. 4. Due to the cooled wall surfaces in the room by the air flow from air diffuser, the unit's radiation effect reduced slightly by 2〜3kcal/m^2・h.

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