固定・可動式ノズル吹出口を用いた空調室内の気流・温度性状に関する研究

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In general, air outlets of the nozzle type or the slot type are used for air-conditioning large open spaces, especially, atriums with high ceilings. Nozzle-type and slot-type air outlets have jet characteristics of long throw and low diffusivity. These types of air outlets discharge air directly into an occupied zone for cooling and make occupants uncomfortable due to the resulting drafts. In addition, the low diffusivity of the jet may produce stagnant zones in which jet air-flow do not reach, thus deteriorating the air quality. Based on these considerations, the authors propose herein movable-outlet air conditioning with cyclically fluctuating nozzles as a technique for effectively controlling the terminal velocity in an occupied area without reducing the jet throw. The present paper reports both the results of an investigation into the usefulness of CFD analysis using LES as a predicting technique and the results of analyzing the air flow and thermal properties of movable-outlet air conditioning in a scale-model room. In the predicting technique investigation, CFD analysis using LES and k-ε was conducted on air flow in a non-isothermal room of excellent buoyancy. The results verified the effectiveness and excellence of LES. In addition, air conditioning with movable nozzles indicated the feasibility of both contributing to the elimination of stagnant zones in an occupied area and constructing zones having good air flow and thermal space.
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固定・可動式ノズル吹出口を用いた空調室内の気流・温度性状に関する研究

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