[Equest-users] ASHRAE 90.1 ERV 50% energy recovery effectiveness - eQUEST inputs?

[Keith Swartz via Equest-users]

Bill,

For all practical purposes, I also simply set the sensible and latent effectivenesses to 50%. If your energy model will get thorough scrutiny, you may want to use Equation 6-K in the User's Manual, 2013 edition.

Keith Swartz, PE | Senior Energy Engineer
Seventhwave
608.210.7123 seventhwave.org

From: Lapierre, Patrick via Equest-users [mailto:equest-users at lists.onebuilding.org]
Sent: Thursday, May 18, 2017 11:57 AM
To: Bishop, Bill <bbishop at pathfinder-ea.com>
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] ASHRAE 90.1 ERV 50% energy recovery effectiveness - eQUEST inputs?

It is my interpretation as well and what I always do.

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

Patrick Lapierre_ing. BEMP
plapierre at bpa.ca<mailto:plapierre at bpa.ca> | t: 5143833747x2807


De : Equest-users [mailto:equest-users-bounces at lists.onebuilding.org] De la part de Bishop, Bill via Equest-users
Envoyé : 18 mai 2017 12:53
À : equest-users at lists.onebuilding.org<mailto:equest-users at lists.onebuilding.org>
Objet : [Equest-users] ASHRAE 90.1 ERV 50% energy recovery effectiveness - eQUEST inputs?

I'd appreciate some sensible guidance. Please don't dampen my spirits...

Section 6.5.6.1 describes that required energy recovery systems (ERVs) "shall have at least 50% energy recovery effectiveness", meaning "a change in enthalpy of the outdoor air supply equal to 50% of the difference between the outdoor air and return air enthalpies at design conditions".
My reaction is to model this by setting both the sensible and latent effectiveness (ERV-SENSIBLE-EFF and ERV-LATENT-EFF) to 50% (0.50).
Is this correct?

Ye be thanked,
~Bill

William Bishop, PE, BEMP, BEAP, CEM, LEED AP | Pathfinder Engineers & Architects LLP
Senior Energy Engineer

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