10 越屋根の換気性能

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タイトル別名
  • 10) VENTILATION CHARACTERISTICS OF THE MONITOR ROOF
  • 越屋根の換気性能
  • コシヤネ ノ カンキ セイノウ

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This paper, one of a series is limited to fundamental finding from a experimental study on the ventilation through monitor roof. It is reasonable that the ventilation characteristics of the monitor were expressed by the outdoor, free wind speed, monitor flow rate or the mean air-velocity at the monitor inlet and the static pressure at the same point. The shapes of the ventilation characteristics curves are depend on the three elements, that is the wind pressure coefficient, flow resistance of the monitor and the size of the stagnant zone produced by the building roof and monitor roof. The relation between size of the stagnant zone and monitor flow rate were find by the fundamental testing on the ventilation rate of the opening on the flat plate and in stagnant zone produced by the wind-break plate standing on the same flat plate. Next step, finding is the effect of the wind break plate in the case of the monitor roof and various dimentions of the monitor. Difference between characteristis of the monitor on the flat roof and the pitched roof is. 1) that the increases of the clearance between wind-brake plate and roof surface, decreases the flow rate in the case of the flat roof and increases in the pitched roof. 2) that the effect on the flow rate of the wind break plate is very obvious in the case of pitched roof but in the flat roof is uncertain. It is advisable the obtaining the uniform frow rate for any wind direction by the application of the wind-brek plate.

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