| Summary: | 碩士 === 國立勤益科技大學 === 冷凍空調系 === 99 === The air conditioner was designed to control the temperature of indoor environment in the past. However, as times progress, besides controlling the temperature as required, it is required to achieve healthy air quality. This study used computer simulation to discuss the effect of air conditioning planning of different air flow patterns of horizontal and vertical laminar flow in bone marrow transplantation ward (BMTW) on the ventilation efficiency and contaminant removal efficiency. The contaminant concentration on the regions nearby the operating table were compared and analyzed. The study found that even if the vent arrangement of vertical laminar flow is distributed uniformly in relation to the space, the ventilating flow removes the contaminant concentration in the operating area of operating table slows, whereas the ventilation system of horizontal laminar flow can provide good air flow pattern and contaminant removal for the operating table region. In addition, in the case of using horizontal laminar flow design to reduce the supply air for energy saving, the study found that regardless of the supply air vent area is reduced or the air velocity is reduced from 0.023m/s to 0.0184m/s directly, a good removal effect can be maintained. However, keeping the area of the return air vents and reducing the air velocity would have better removal effect on the contaminants in the whole space than maintaining the supply air velocity and reducing the supply air vent area. It is mainly because the outlet coverage is an important key in contaminant removal.
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