Fire Hydrant
由入水位開始講起,FSD講到明想講水缸放到上天台再責水落嚟。同Sprinkler Tank唔同,Sprinkler嗰個放天台冇著數,因為點都要兜返落G/F個Control Valve再打上去,FH/HR個缸就唔洗做呢樣嘢,但水記入水啲水唔夠壓的話就要加個Transfer Tank, 如圖﹕
呢個Transfer Pump 要六個鐘頭內refill滿天台個缸。
另一條路係由個FS Inlet打上去
一個Staircase一個FS Inlet, 如果超過60m, 就要加Intermediate Bosster Pump, 詳見 https://elvissharing.blogspot.com/2020/03/fs-intermediate-booster-pump-jockey-pump.html
之後到水缸Size, 係跟紅皮書,單層最大係乜面積,就揀返相對應Size水缸
上到天台水缸後責落嚟,最高嗰堆唔夠壓所以都要加泵,中間有段唔洗加,因為紅皮書要求係450L/min, 350-850kPa, within 呢個Range係最正乜都唔洗做,但如果棟樓再高啲,最低嗰幾層就要加Pressure Relief Valve
所以計落FH/HR System會有三SET泵,一SET係由Trasfer Tank 泵水上天台水缸,一SET係Inlet泵上去既Intermediate Booster Pump, 一SET係天台責返落嚟頭幾層唔夠壓既泵。(當然大前提係層樓夠高先會咁。)
Hose Reel
拉長佢30m 要到晒所有位置,要Jet到6m, 冇乜特別同FH類似。
Hose Reel 隔離會有個Manual Breakglass, 連帶住响鐘同埋Visual Signal, 爆咗之後會起泵同埋Direct Link 去消防局
Street Hydrant
100m 一個,Alternative Side, 個Pressure head & flow跟 BS1042要求。
(鳴謝﹕肥喵)
I am PolyU BSE Student, I found this very useful.
回覆刪除although it is same as what we have learnt, it is helpful to us, as a learner and beginner, because it was written in Chinese and more practical.
thanks support
刪除已我所知當系統壓力跌到65%時起Standby, 但Standy唔掂係唔會再換返Duty. 因為當著duty pump 但系統壓力keep 住跌(反映到duty pump performance 有問題),所以先要轉Standy pump, 所以當standby pump 都維持唔到系統壓力時(反映到standby pump performance 有問題),基於safty 考慮即使standby pump唔掂但當fire 時都會keep 住長行standby pump. 所以我想知你講的 ''Standy唔掂又再換返Duty.'' 係睇到咩資料搵到的?
回覆刪除之前遇過有FSD阿Sir收貨嗰陣係咁演譯﹕
刪除而家一號泵係Duty, 二號泵係Standby, 一號冧咗後,自然二號做Duty. 跟據Duty係需要有Standby 15秒接力到,咁即係一號仔要接力返二號仔啦。
但問題係,咁做咪會一號仔同二號仔之間無限切換?
我問返原來呢個唔係慣常做法,只係有某啲阿SIR會咁演譯。普遍做法係正如你所講,由得比二號仔行到死就算,唔會再切換返一號仔無限跳。
所以我都係剷左呢句以免誤導。多謝你嘅補充。