JustAnotherChemE
Chemical
- Jun 21, 2007
- 11
Hello,
I'm trying to spec out a way to recover heat off two 400hp screw type air compressors. These units have (or will shortly) their own four pass heat exchangers using an EG/water mix as cooling on the tube side. The oil from the compressor is in a closed loop.
Now the units developed by the air compressor company should be rejecting about 900,000-1MBTU/hr in the form of ~105 deg F EG/water flowing at about 70 GPH.
My scheme is to set up a secondary HX to recover this heat into a 55 deg F stream of city water which will then be mixed with the water headed to our [future] direct fire heaters.
One compressor is running pretty much 24/7 whereas the other might kick in 60% of the time when we enter peak production. We also have several 150hp compressors from the same company which might be worked into the system at a later date.
Now I'm fairly familar with shell and tube variety HXs, but I need to know if there are more efficient variaties for my application. One manufacturer suggested I consider a "Plate and Frame" type.
Suggestions?
I'm trying to spec out a way to recover heat off two 400hp screw type air compressors. These units have (or will shortly) their own four pass heat exchangers using an EG/water mix as cooling on the tube side. The oil from the compressor is in a closed loop.
Now the units developed by the air compressor company should be rejecting about 900,000-1MBTU/hr in the form of ~105 deg F EG/water flowing at about 70 GPH.
My scheme is to set up a secondary HX to recover this heat into a 55 deg F stream of city water which will then be mixed with the water headed to our [future] direct fire heaters.
One compressor is running pretty much 24/7 whereas the other might kick in 60% of the time when we enter peak production. We also have several 150hp compressors from the same company which might be worked into the system at a later date.
Now I'm fairly familar with shell and tube variety HXs, but I need to know if there are more efficient variaties for my application. One manufacturer suggested I consider a "Plate and Frame" type.
Suggestions?
