[AC] [PD] [EL] 問﹕Swimming Pool 泳池 BS Design 有啲乜要考慮？

答﹕

Indoor Design: 30°C D.B., 60% R.H., Slightly Negative Pressure; Low exhaust; 4-6 ACH; 派風要平均；

Reason: 
- 30°C D.B. reduce operating cost; 雖然更容易condense (平時可能16°C, 但而家22°C就condense), 但送風溫度可以增加，減低energy consumption;

- 60% R.H. 係响comfort同energy consumption之間攞個平衡，再高啲人唔舒適，低啲就嘥電；仲有如果濕度太高會growth of mold and fungi;
- Negative pressure 係為咗避免啲水氣到處走，因為泳池既水氣有Chloramine, 會腐融建築物；
- Low Exhaust near the surface of the pool assist evaculating chloramine;
- 派風唔平均會局部condense;

此外，Cooling Loading Estimation 嗰陣都要留意個pool evaporation rate, ASHRAE有講點計，池水溫度越高evaporation rate 越高；仲有一系列方法可以用少啲Chloramine, 如Ozonation, UV 消毒殺菌、加大個water exchange rate etc.

响香港，泳池係要根據Swimming Pool Regulation Cap. 132, Section 42向食環署Food and Environmental Hygiene Department FEHD攞牌照，機電方面大概係包括
- 有水入面既泳池燈的話，25V內；

- 泳池所有地方包括水面要有200lux及一個鐘後備電;
- 有蓋池四個鐘換水一次；露天六個鐘一次；每年最少成個池抽乾一次；

ASD都有一本專係Swimming Pool Water Treatment General Specfication

Filtration Plant Example, 啲泳池水係會經Sand Filter, Chemical, 再過Heat Pump / Heater (如有需要)。

(Source: 2019 ASHRAE Handbook Applicaiton; Swimming Pool Regulation Cap. 132, Section 42)