DWH Per Thermal Zone

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Does anyone know a way to model one gas-fired DWH per thermal zone.? I have a model with one in each apartment.
Thank you,?Paul Diglio

via Equest-users's picture
Joined: 2016-07-15
Reputation: 400

Just off the top of my hrad. Separate DHW loops?

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On Mon, May 2, 2016 at 10:58 AM, Paul Diglio via Equest-users wrote: Does anyone know a way to model one gas-fired DWH per thermal zone.? I have a model with one in each apartment.
Thank you,?Paul Diglio

via Equest-users's picture
Joined: 2016-07-15
Reputation: 400

Thanks for the response guys.
I tired modeling one DWH per a zone using the zone location hoping that it would only serve that zone, but the usage is over 2,000 therms per year so that would be the whole building.
I might need to combine them.? The problem is that I have one floor that is on the house fuel meter and 20 apartments that are on the residential meter and it appears I can't separate the two .
Regards,?Paul Diglio

via Equest-users's picture
Joined: 2016-07-15
Reputation: 400

You might model the house meter DHW as DHW but model the suite DHW as a source load in each suite space, then in the zone you can assign those source loads to a separate fuel meter. I think.

[cid:image003.png at 01D09C46.E75BA0D0]
Christopher Jones, P.Eng.
Senior Engineer

WSP Canada Inc.
2300 Yonge Street, Suite 2300
Toronto, ON M4P 1E4
T +1 416-644-4226
F +1 416-487-9766
C +1 416-697-0056

www.wspgroup.com

Anonymous's picture
Anonymous

Thanks Christopher.? Do you mean I should add it in Internal Loads/Equipment/Internal Energy Sources?
?Paul Diglio

via Equest-users's picture
Joined: 2016-07-15
Reputation: 400

Yes,
You could use SOURCE-TYPE = GAS. For example, if you have the peak hot water flow and a schedule that modifies that flow, you would have to convert that to the GAS peak taking into account the seasonal efficiency of the suite DHW systems.

You can then assign a fuel meter in each zone to capture the suite DHW energy use separate from the common house DHW system.

[cid:image003.png at 01D09C46.E75BA0D0]
Christopher Jones, P.Eng.
Senior Engineer

WSP Canada Inc.
2300 Yonge Street, Suite 2300
Toronto, ON M4P 1E4
T +1 416-644-4226
F +1 416-487-9766
C +1 416-697-0056

www.wspgroup.com

Anonymous's picture
Anonymous

Hi Paul,

For configuring the DHW meter as per separate meter and separate floor
based you need to configure out two things:

1. Make different DHW loops as per the area served based on system.
2. Try linking different loops to different meter in meter tab in the
system.

For this one need to figure out the therms serving different areas out of
2000 therms per year.
Link the meter in the meter tab in system in Air side.

Also, i have tried to drag the fuels in the two parts. I think first is gas
and the residential is another based on gas or electricity.
So while creating DWH loops configure out different spaces, different
amount of therms input, different fuels and have a help on all these
factors while linking the meters in meter tab in Air-side.

*Thanks,*
Sharad.Kumar|Engineer
Green Horizon Consulting LLP
Gurgaon
India.

*From:* Equest-users [mailto:equest-users-bounces at lists.onebuilding.org
] *On Behalf Of*Paul Diglio via
Equest-users
*Sent:* Monday, May 02, 2016 2:43 PM
*To:* John Aulbach; David Eldridge; Equest-users
*Subject:* Re: [Equest-users] DWH Per Thermal Zone

Thanks for the response guys.

I tired modeling one DWH per a zone using the zone location hoping that it
would only serve that zone, but the usage is over 2,000 therms per year so
that would be the whole building.

I might need to combine them. The problem is that I have one floor that is
on the house fuel meter and 20 apartments that are on the residential meter
and it appears I can't separate the two .

Regards,

Paul Diglio

via Equest-users's picture
Joined: 2016-07-15
Reputation: 400