what kind of fire suppression i have to use in Battery charging room , since the room producing the hydrogen and oxygen ... Hydrogen gas when mixed with oxygen or air can be explosive so please advice with Reference Code
¿What's the purpose of the batteries?
See NFPA 111 for fire protection requirements if the batteries are used for emergency purposes. If the battery charging room is on a power generation facility, it should comply with NFPA 850.
If the battery charging room is inside a sprinklered building, best option is to also have sprinklers inside the room.
actually its is in a medical warehouse building its is contain the Battery charging area , however i have requested the same thing to the client , still i didn't get , however can you please suggest me , in different scenario.
See NFPA 111 Section 126.96.36.199 Battery Installation. Most battery rooms I've encountered use Sealed and valve-regulated batteries.
I would assume the batteries are lead acid type as back up for the instrumentation systems. Therefore, the batteries are in a closed concrete room with fire rated door provided with an air conditioning and exhaust fan will prevent build up orf dangerous gas emissions by the batteries. In case of fire protection, I would suggest Gas Automatic Suppression (CO2, Inergen) triggered by heat activated alarm/detector. Exhaust fan should stop automatically through interlocks following activation of the heat detector. Fire door has to be self closing and fire rated.
Hope this helps.
Gas suppression system (Inergen or other) could be used in battery changing room. In battery charging room, hydrogen (H2) gas generating (emission) quantity could be calculated as per the battery manufacturer data's, as follows.
The volume of hydrogen evolved from a battery (Ni-Cd) per hour (AC & DC UPS)= Number of cells x Charge current x 0.00042 m3 (battery manufacturer data)
The same shall be for normal mode and boost charging mode as required. You could use H2 gas detector for the same to have an fire alarm in case of fire. The same shall be in voting logic with gas suppression or other system as per the required matrix.
When the battery is housed in a cubicle or enclosed compartment, it is necessary to provide adequate ventilation.
During the last part of high-rate charging, the battery is emitting gases (oxygen and hydrogen mixture). If it is required to establish that the ventilation of the battery room is adequate, then it is necessary to calculate the rate of evolution ofhydrogen to ensure that the concentration of hydrogen gas in the room is kept within safe limits.The theoretical limit for hydrogen concentration is 4%. However, some standards call for more severe levels than this, and levels as low as 1% are sometimes required.
NFPA - 70 (article 480) says about storage batteries to look in. FM global data sheet- emergency and standby power systems align the same with its code to refer.
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