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NC-2009 EAc1:Optimize Energy Performance

Thermal zone modeling

Jatuwat Varodompun

Green Building Soultion

LEEDuser Premium Member

20 thumbs up

October 8, 2013

I have a building with two conditioned zones. One is dining and another is kitchen. Both zones has no wall and air can flow through each zone freely. Can I model both zones as one zone in the energy model, since the exhuast system of the kitchen will induce the air from dining zone? Thanks

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Wed, 10/09/2013 - 19:46

Maybe but I would guess not. Are they served by only one system? See also Table G3.1-7 and G3.1-8. A kitchen and dining area have very different thermal loads.

Jatuwat Varodompun

Green Building Soultion

LEEDuser Premium Member

20 thumbs up

Thu, 10/10/2013 - 00:13

Dining area was served by 3 AHUs and Kitchen was served by 2 AHUs. One make up air unit serve both zone and the exhuast is located in the Kitchen. So, all the OA will pass from dining to kitchen through the counter area (large free area opening without door or window). With this setting, it is hard to model them as separated zobes.

Jatuwat Varodompun

Green Building Soultion

LEEDuser Premium Member

20 thumbs up

Tue, 11/12/2013 - 09:04

Can anyone help me on this?

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Tue, 11/12/2013 - 14:21

Sounds like the remaining issue is how to model it. That tends to be very software specific. What software are you using?

Jatuwat Varodompun

Green Building Soultion

LEEDuser Premium Member

20 thumbs up

Tue, 11/12/2013 - 14:29

eQUEST.

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Tue, 11/12/2013 - 19:08

Yep eQUEST will not allow you do this air exchange between zones. So our thought would be to locate the OA and exhaust in the dining zone with the exhaust on the kitchen schedule. The kitchen would have no OA or exhaust.