Elsawwadi
Mechanical
- Feb 26, 2022
- 4
Hello friends..We are carrying out maintenance and renovation works for all electromechanical works for a four-star hotel. The hotel consists of a service ground floor with an area of: 6 floors of rooms, and the seventh floor is the roof. Among these works is the renewal of the existing firefighting system "Class II standpipe" :
- 3 Risers 2 inch Vertical Pipes
- Total area of the ground floor : 2286 m² (reception, cooking, restaurant, administration, meeting rooms, lobby area, administrative offices, small indoor swimming pool & spa):
- Area of the six typical floors (guest rooms) 3x1798= 10,788 m²
There are three Hose cabinets at each Guest Room corridor (3 x 6) Total : 16 cabinets, 2 cabinets at the ends of corridor (left & right) at the escape stairs and the third in the middle of the corridor in the lobby near the guest elevators, the distance between each two Hose Caninets is 50 meters.
On the ground floor there are 9 hose reel cabinets distributed in different sections.
The total number of cabins in the hotel (27)
The owner of the hotel decided to keep the design of this system as it is.
The pumps are located on the seventh floor near the elevator machine rooms (main, jockey and diesel pumps) and fire fighting water tank (27 m³).
My request is: Is it possible to re-calculation of hydraulic values to become as following :
To use 2" pipes for the three vertical risers and 1" pipes for hose connections, so that the flow rate for each hose = 9 m³/h and hose water pressure = 3.5 bar, and please calculate the amount of storage water based on 4 water hoses for 30 minutes.
If this is not consistent with the system, please specify :
- hydraulic calculations of pumps and determine the correct flow rate for each hose and the correct water pressure from the hose and thank you very much for you help.
- 3 Risers 2 inch Vertical Pipes
- Total area of the ground floor : 2286 m² (reception, cooking, restaurant, administration, meeting rooms, lobby area, administrative offices, small indoor swimming pool & spa):
- Area of the six typical floors (guest rooms) 3x1798= 10,788 m²
There are three Hose cabinets at each Guest Room corridor (3 x 6) Total : 16 cabinets, 2 cabinets at the ends of corridor (left & right) at the escape stairs and the third in the middle of the corridor in the lobby near the guest elevators, the distance between each two Hose Caninets is 50 meters.
On the ground floor there are 9 hose reel cabinets distributed in different sections.
The total number of cabins in the hotel (27)
The owner of the hotel decided to keep the design of this system as it is.
The pumps are located on the seventh floor near the elevator machine rooms (main, jockey and diesel pumps) and fire fighting water tank (27 m³).
My request is: Is it possible to re-calculation of hydraulic values to become as following :
To use 2" pipes for the three vertical risers and 1" pipes for hose connections, so that the flow rate for each hose = 9 m³/h and hose water pressure = 3.5 bar, and please calculate the amount of storage water based on 4 water hoses for 30 minutes.
If this is not consistent with the system, please specify :
- hydraulic calculations of pumps and determine the correct flow rate for each hose and the correct water pressure from the hose and thank you very much for you help.