Process air heater design
Process air heater design
(OP)
Somebody could guide me about process air heater design complete calculations. Exchanger is shell and tube and heating is with 200 psi steam. Inlet temperature of air is 70F and required outlet is about 200F.
Thanks.
Thanks.





RE: Process air heater design
RE: Process air heater design
This exchanger is about 30 years old and now giving problems.
We have one used air heater (shell and tube exchnger) available at our plant. It has 560 tubes, 3/4" OD, 11 feet in length, 12" air inlet and 12" air outlet. Can i use this exchanger for the above mentioned service without any problem (pressure drop etc.)
I can see that heat transfer will be more in the exchanger having more tubes but i am worried about the pressure drop due to 12" inlet and outlet(existing heater has 16") and more number of tubes.
Help will be appreciated.
Thanks.
RE: Process air heater design
BTW, what are the "problems" you are referring to, pressure drop?
RE: Process air heater design
The estimated overall heat transfer rate was 15.8, thus showing no problem on the heat transfer