[Equest-users] Heat Recovery Control

[Lapierre, Patrick]

One way to do it would be to build a custom 8760h schedule using the schedule excel tool produced by EMIT (attached).
You output the outside temp of your meteo file and manually set them to On/Off according to the outside temps you mentionned below (0 between 55 and 72, 1 otherwise).
Then you import the schedule in your model and set your ERV to run according to this schedule.

It’s a little longer but it will do exactly what you want to.


[Bouthillette Parizeau]<http://www.bpa.ca/>

Patrick Lapierre_ing.
plapierre at bpa.ca


De : Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] De la part de Aaron Powers
Envoyé : 14 mars 2016 12:56
À : equest-users at lists.onebuilding.org
Objet : [Equest-users] Heat Recovery Control

I'm trying to model a heat recovery device on a 100% OA VAV unit.  The supply air temperature setpoint is a constant 55 F throughout the year.  To maximize the savings, we will be locking out the heat recovery when the outside air is between 55 and 72 F.  When the outside drybulb is less than 55, we will have pre/re-heat savings, and when the outside drybulb is greater than 72 we will have sensible cooling savings.  The closest control scheme that I can find to this in eQuest is to set ERV-RUN-CTRL = "OA Exhaust DT", set ERV-RECOVER-MODE = "OA Cooling" and OA-EXHAUST-DT = 0.  But unfortunately, this will not pick up the heating savings.
Does anyone know of a better way to model this control?
Aaron
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