ahmet erkan wrote: > 5. We must remove the smoke and replace it with air. > 6. We blow cool air into the compartment because if we suck the hot > air we might melt down the fan or the duct. > > Norm might be on the right path. I will wait for the explanation. >
REPLY Good points! However I am still concerned about pushing the smoke into the boat's interior. Hence the question of extraction rather than in-feed of air. A number of fans blowers and such are designed for ignition proof applications. these use metal blades and shafts plus metal ducting. The vulnerable motor itself is mounted outside the duct path so heated air ( or flammable fumes) are not in contact with the motor or any sparks. Presumably at least one hatch is open to the vessel interior to enable a person to enter the engine room compartment and a blower pushing fresh air into th eE/R would also push smoke through this access opening. If no other opening was available then the fan would simply pressurize the compartment slightly but soon the air flow would stop when the fan's ability to pressurize the compartment reached a limit. High volume fans typically have low pressure capability. A second thought. If the E/R hatch opens inward ( and many do) if you pressurize the compartment with a fan blowing into the compartment, it will be that much more difficult to open the door to enter and fight the localized fire. This would not be true for boats with floor hatches that lift up. regards Arild . _______________________________________________ Liveaboard mailing list [email protected] To adjust your membership settings over the web http://www.liveaboardnow.org/mailman/listinfo/liveaboard To subscribe send an email to [EMAIL PROTECTED] To unsubscribe send an email to [EMAIL PROTECTED] The archives are at http://www.liveaboardnow.org/pipermail/liveaboard/ To search the archives http://www.mail-archive.com/[email protected] The Mailman Users Guide can be found here http://www.gnu.org/software/mailman/mailman-member/index.html
