[Trace-users] Trace-users Digest, Vol 41, Issue 3

[Bob Fassbender]

Matt -

Is the refrigeration equipment modeled? Or is it just assumed as a process
load?

If it is just an assumed process load, then you will need to know the
amount of recoverable heat (and a schedule). Let's say it is 10 MBH:

Then, you would have to create a heating plant for the makeup air. That
heating plant would contain at least two pieces of equipment,  the first
being the "recovered heat". Set the capacity to 10 Mbh (in this case), and
then you set the rate to something like .001 KW. Finally, set your schedule
for that equipment if it is not running 24/7.

Then you would have "free" heat up to 10 mbh for that makeup air plant, the
remainder of which would come from the next piece of equipment.

Anyway, we might be able to come up with something better, but we'd need to
know more about the particular setup.

Bob Fassbender
Energy-models.com



On Wed, Mar 21, 2012 at 3:37 PM,
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>   1. Trace Process Refrigeration (Matt Cale)
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> Message: 1
> Date: Wed, 21 Mar 2012 12:08:12 -0400
> From: Matt Cale <Matt.Cale at cadmusgroup.com>
> To: "trace-users at lists.onebuilding.org"
>        <trace-users at lists.onebuilding.org>
> Subject: [Trace-users] Trace Process Refrigeration
> Message-ID:
>        <197E0C924E33A54BB41B2921100AFF2516E8F393A2 at mail.cadmusgroup.org>
> Content-Type: text/plain; charset="us-ascii"
>
> Hello all,
>
> I am working on a model in which the designer has included heat recovery
> from process refrigeration equipment which is used to preheat makeup air.
> Any suggestions on how to get this process to react properly?
>
> Thanks in advance,
>
> Matt Cale, PE, LEED AP
> Associate
> The Cadmus Group<http://www.cadmusgroup.com/>
> M: 321-663-2336
> matt.cale at cadmusgroup.com
>
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