[AC] 問﹕試簡介一下Chilled Ceiling System.

答﹕

先分Chilled Ceiling System & Chilled Beam System

Chilled Ciling System, 就咁Laid啲Pipe响個Metal False Ceiling度，Cools Room by Natural Convection & Radiation, max. output only 70W/m² (*100ft/ton大概係380W/m²; 200ft/ton大概係190W/m²)



Chilled Beam System又分兩種，一種係Passive, 一種係Active
Passive 同Active 最大分別係，後者會比Pre treated Primary Air, 去到160W/m²



最重要設計考慮係唔好滴水，即係只要任何物件，包括個Fin, Ceiling Panel etc.個Surface Temperature高過Design個Dew Point, 就唔怕室內落雨。

上面堆資料見到，Primary Air 12℃, 入水15℃, Dew Point 13.5℃, 就避到滴水。

用呢種嘢好處係全部都係因為少咗Fan帶嚟，慳電、靜、慳維修，Ceiling Depth要求都少咗；
壞處係有水管响頭頂經過有機漏水，同埋如果啲Sensor / Control 做得唔好就兜頭落雨。此外Cooling Capacity都唔係高。

順帶一提仲有種係行Low Temperature Chilled Ceiling System, 個水溫用7℃, 但唔多案例，淨係得中國有相關Standard. 

Example:
PAU駁住某堆Chilled Beam; Chilled Water 經Heat Exchanger派比Chilled Beam;


(鳴謝﹕紅豆)