Exhaust Heat Recovery

asked 2016-09-12 22:34:52 -0600

Fish Lee
183 ●6

updated 2016-09-13 06:41:50 -0600

__AmirRoth__

4446 ●5 ●17 http://bleedinggreenna...

Hi all,

I am trying to model a system which has heat recovery coil designed at all exhaust air stream in E+. I can only see unitary system has the capability to add heat recovery coils at exhaust but my systems are mostly VAV distribution system. Any suggestion on how to model it?

answered 2016-09-13 15:28:25 -0600

Lyle K

2226 ●2 ●16 http://www.aeieng.com/

updated 2016-09-13 15:35:30 -0600

I would take a look at the HeatExchanger:AirToAir objects in EnergyPlus (documentation HERE).

The HeatExchanger:AirToAir:SensibleAndLatent object is frequently used to approximate a sensible only run-around coil by setting the latent effectiveness to zero. You might check out the following posts for some additional insight on the use of this object...

Modeling run around loop in openstudio

Modeling Run-around loop Heat Recovery in EnergyPlus

Heat Exchanger and Outdoor Air Mixer

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Thanks for your advise! I think I will explore the option of using EMS to modify the district heating loop input depending on the energy recovered from the exhaust air.