energy recovery loop

[ramnam]

how do you size an energy recovery run around loop?
my building exhaust is 6500 cfm
and my intake is 7500 cfm
location Virginia. Max Summer 94, Min Winter 14 F
any thoughts?
i need GPM

 

[ChrisConley]

You need a coil sizing application. Most heat recovery and/or coil manufacturers will have what you need. Otherwise you could sit and work out the answer iteratively....but I'd recommend the free software. It will spit out flow rate, heat recovery, number of rows, fins per inch. I recommend trying Heatcraft's coil selection tools as well.

http://www.heatcraft.com

 

[stevenw]

I would call the "T" or "C" rep.
both have programs to size the coils.
My guess is a 4 row coil, 8 fpi, 10% glycol, 750 fpm face velocity, pump, expansion tank, fill valve, freeze stats...

 

[ramnam]

Thank you for the answers! you're right. i was ending up in an iterative exercise.