Saber Elkassas
Mechanical
- May 5, 2018
- 4
1. According to nfpa or ashrae what are the applications and situations that must be provided for a system of smoke extraction?
2. In hospitals when they are divided into fire compartments, which is the smoke management system used to protect those sectors
3. If the answer is: zoned smoke control system, is the smoke withdrawn from the sector completely or from the escape corridors only and what is the value of the make up air for this situation.
4 - If all the escape paths are provided for a 7ach fan and a 6ach fan exhaust in this case, the fire zone becomes negative. How the same fans are made working to pressurize the escape corridors in the surroundings.
5 - What is ahu control arrangement that will be used in the system of exhaust and makeup so that it can provide the air necessary for air conditioning and smoke, taking into account the difference in value between them and should be linked to a separate smoke fan on the air return.
6. Is it possible to have a passive system only without an active system?
7. Is there an explicit provision prohibiting the use of flexible joints in the smoke-extraction system?
In the hotels in case Ahu is used for air conditioning and other air conditioning areas within the fire compartments, all branches are separated by MSD or must be separate for use in the smoke-withdrawal system.
9- In the car parking, some consultants perform a exhaust system that works on 3 Modes according to the CO ratio where the 3ach fan works 30% of its capacity at 25 ppm or less and 6ach by 60% at more than 25 ppm and 10 ach in case of firemode Is this compatible with nfpa or ashrae.
10 - What are the requirements for ducts and fans used in smoke extraction according to nfpa or ashrae.
11- During the pressurization of the stairs, a pressure transmitter is placed in all floors or in specific places.
2. In hospitals when they are divided into fire compartments, which is the smoke management system used to protect those sectors
3. If the answer is: zoned smoke control system, is the smoke withdrawn from the sector completely or from the escape corridors only and what is the value of the make up air for this situation.
4 - If all the escape paths are provided for a 7ach fan and a 6ach fan exhaust in this case, the fire zone becomes negative. How the same fans are made working to pressurize the escape corridors in the surroundings.
5 - What is ahu control arrangement that will be used in the system of exhaust and makeup so that it can provide the air necessary for air conditioning and smoke, taking into account the difference in value between them and should be linked to a separate smoke fan on the air return.
6. Is it possible to have a passive system only without an active system?
7. Is there an explicit provision prohibiting the use of flexible joints in the smoke-extraction system?
In the hotels in case Ahu is used for air conditioning and other air conditioning areas within the fire compartments, all branches are separated by MSD or must be separate for use in the smoke-withdrawal system.
9- In the car parking, some consultants perform a exhaust system that works on 3 Modes according to the CO ratio where the 3ach fan works 30% of its capacity at 25 ppm or less and 6ach by 60% at more than 25 ppm and 10 ach in case of firemode Is this compatible with nfpa or ashrae.
10 - What are the requirements for ducts and fans used in smoke extraction according to nfpa or ashrae.
11- During the pressurization of the stairs, a pressure transmitter is placed in all floors or in specific places.