Tech Plant Fire Protection Water System of Water Hammer
|關鍵字:||消防共用水系統;水力計算;Surge;水鎚作用;科技廠房;維護保養;hydraulic calculation;Surge;pressure reducing valve;semiconductor manufacturing plants;water hammer;Preventive Maintenance|
本研究運用 SURGE 水力計算軟體進行消防共用水系統管路內處於紊流狀態之模擬情境，配合上從實際消防設備維護保養過程中，與現場實驗結果驗證，歸納出數種可能造成水槌作用的原因，以提出相關預防措施。
Due to the increasingly demand of high density usage of property space and cost /energy saving , it is getting common to install the simultaneous water supply requirements for fire protection equipment simultaneous system ; namely, fire hydrants, automatic fire sprinklers, water mist system and fire hose reels served by the same water supply in semiconductor manufacturing plants. Based on the conservative but reasonable observation that a fire event is likely to activate an automatic sprinkler system or water mist system, occupants may use fire hose reels and the responding fire agency is likely to use the fire hydrant system whilst the sprinklers continue to operate the minimum performance of each system will be demanded simultaneously. However, some actions cause rapid change of water demand such as valve open/close, outlet open/close. Based on observations, water hammer occurs when continuous ,rapid or irregular changes happen in simultaneous system . There are several transient analysis methods, but this work employed only the computer model (SURGE software) to construct models to calculate and simulate transients in a pipeline. Many scenarios and different valve closure operations were applied to the models (with a pump and without a pump in the pipeline) to study the transients. The analysis shows that the routine fire flow pump tests would cause a frequent failure during fire flow testing. The fact that these failures occur infrequently can be attributed to some careless operation of fire fighting personal for surge protection such as rapid turn off/on. The occurrence of transients can introduce large pressure forces and damage the whole pipe system. Note that the hydraulic model of (simultaneous system) which is required to design the system can be used to perform a transient analysis and provide the risk evaluation , the standard of operations (SOP) . Therefore, little additional effort is required to perform this critical step and assure safety environment.