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Floor area reduced when adding vertically stacked spaces into a single thermal zone

asked 8 years ago

When I put two vertically stacked spaces into one thermal zone in OpenStudio. The simulation results shows that the floor area is just half of the total floor area. Even though I have checked the "Part of Total Floor Area" in OpenStudio for each space. Looks like the internal gains (people, lights, electric equipments) were defined as per floor area, so I assume in EnergyPlus simulation they are also reduced by half. Is that what's expected?

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answered 8 years ago

updated 8 years ago

I believe this is a known issue with several associated ones.

https://github.com/NREL/OpenStudio/is...

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answered 8 years ago

BL's avatar

The internal load density is not changed, but the floor area is reduced. So you need to use the multiplier in OS or E+ to recovery the actual floor area. I believe the main purpose of combine multiple zones into one is for decreasing simulation time if the loads and HVAC systems are similar between zones.

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Asked: 8 years ago

Seen: 287 times

Last updated: Apr 01 '16