[Equest-users] Equest - adding Heat Recovery to VAVS system

[Ginnie Schofield]

Bruce & Users:

Since an ERV/HRV schedule was not created with system, I tried to create one.  That didn't work out so well for me.  I believe my results are being calculated on 24/7 operation and NOT bypassed or off when running.   Getting a proper operation schedule should help with the additional cooling shown on simulation reports.   Any ideas or methods to create a schedule that will work?

Again, thank you all in advance.


GINNIE SCHOFIELD
MECHANICAL ENGINEER
gschofield at edaengineering.com



From: Bruce Easterbrook [mailto:bruce5 at bellnet.ca]
Sent: Wednesday, June 05, 2013 10:47 AM
To: Ginnie Schofield
Cc: equest-users at lists.onebuilding.org
Subject: Re: [Equest-users] Equest - adding Heat Recovery to VAVS system

Hi Ginnie,
IAQ costs money and bringing in fresh outside air to improve it is the solution.  Heat recovery depending on your climate doesn't always save money but typically if you have hot humid summers or cold winters it will.  I would first take a look at your ERV/HRV schedule to make sure it isn't running 24/7.  You should also check it's relationship with the economizers.  It should be off and bypassed when they are running.  You only need fresh air for people when they are there occupying the building.
Bruce Easterbrook P.Eng.
Abode Engineering
On 05/06/2013 11:22 AM, Ginnie Schofield wrote:
Equest Users:

In my school model, I have added the Heat Recovery option to my VAVS system in the current model, and it throws results clear out of line, increasing electric power usage almost 3 times, with increased  ventilation fan operation and space cooling year round, which shouldn't be necessary in Wyoming.

Looking for methods to modify input and correct these obviously errant results.  There has been some discussion here earlier this week, tried a couple of the suggestions, without acceptable results.  If adding another system to handle the heat recovery or adding smaller heat recover to each zone is the right answer, please share the method for creating the new system in detailed edit mode.

Thank you in advance for your time and suggestions.


GINNIE SCHOFIELD
ENGINEERING DESIGN ASSOCIATES
(Ph) 307-266-5033   (Fx) 307-234-3805







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