How to calculate the time required to get the temperature of a room from 140F to 120F?
The case here is (marine), the delta T is 40F while the engines are running once the engines are shutdown, i need to calculate the time needed to bring down the temperature of the room to 120F
russ-watters, our design is for a security craft.
Since we are allowing the deltaT to go higher( once the engines are turned off it won't take long to blow the air out), we came up with reltively small numbers 12800cfm.
Thanx Artman.
russ-watters, Yes the combustion air is coming from atmosphere(not from the engine room) through a duct. the heat released by the engines is 2*4885 BTU/min(9770 BTU/min for 2 engines) and we dont have a radiator. The engine room volume is 3220 cu.ft and the engine room...
Thanx artman, Yes that is what exactly i was looking for. i need to maintain the room temperature under 120F.
Clausius iam having difficulty with the units, can you help me with the units please. i found the heat rejected by the engine which is 4885 BTU/min.
Thanx Clausius2,
Yes the engines are sucking air from the atmosphere and i do have the heat dissippation from the engines.Can you help me in calculating the pressure drop in the engine room. I think it has a n effect in sizing the ventilation.
How to calculate the air needed to cool the engine room and maintanin the temperature not to exceed 120F( for marine duty)with 2 engines of 1401bhp and 2-generator sets. What factors should i consider? i thought of taking the engineer room volume, heat dissipation from the engine and air intake...