Corridors in multifamily - heating and cooling energy?

3 replies [Last post]
chamm
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Joined: 05/25/2017

Hello,

I am modeling a multi-family apartment building with interior corridors and I would like to evaluate the whole building energy consumption. It appears that the lighting power density for corridors can be controlled and it is distributed across the units in the results. What I am trying to determine is how the heating and cooling demand of the corridors is handled. Is this also distributed among the units in the results or is it not accounted for at all? Is there any way to see how much energy is being consumed in the corridors alone?

-Chris

ewilson
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BEopt developer
Joined: 09/27/2011

Heating and cooling are not explicitly modeled for corridors. Only lighting energy is calculated based on the lighting power density input. Unit walls adjacent to corridors are modeled as adiabatic (no heat transfer).

We had to make these simplifications when implementing multifamily building capabilities, as allowing separate HVAC systems for corridors would have required significant effort and was not a high priority.


Eric Wilson
Residential Buildings Group
National Renewable Energy Laboratory

chamm
Offline
Joined: 05/25/2017

Thanks for your response.

One follow up question. When analyzing the results, it appears that the lighting energy used in the corridors is being distributed to all of the units. Is that correct?

If that is the case, is this lighting energy being accounted for in the internal heat gains calculation for the units?

-Chris

ewilson
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BEopt developer
Joined: 09/27/2011

1) Yes, that is correct. Corridor and garage lighting both get distributed equally among the units.
2) No, corridor light gets treated the same as exterior lighting; i.e., no heat gains to the space.


Eric Wilson
Residential Buildings Group
National Renewable Energy Laboratory

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