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NC-2009 EAp2: Minimum Energy Performance

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Complex Energy Model - Dinamic PV panels

July 6, 2010

Rosana Correa

Director
Casa do Futuro

LEEDuser Basic Member

31 thumbs up

July 6, 2010

We are managing a museum certification in Brazil and the building coverage/envelope is composed of photovoltaic panels that are controlled by the automation system and move in accordance with the conditions of sunlight and ventilation. This feature optimizes energy efficiency of PVs panels and also influences lighting and HVAC system. I would appreciate your help on how to develop the energy model, since the building envelope is dynamic.

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Christopher Schaffner

CEO & Founder
The Green Engineer

LEEDuser Expert

963 thumbs up

July 13, 2010 - 9:44 am

It's obviously a sophisticated building. I hope you have a sophisticated energy modeler.

You probably can't do this in a standard way in a modeling software package. You may need to make multiple runs, and combine the results based on different conditions. For LEED it will certainly require an exceptional calculation measure (ECM). Be sure to document all your assumptions and processes carefully and thoroughly.

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FAQs about EAp2:

Is it acceptable to model a split-type AC with inverter technology compressor as a heat pump, like modeling VRF?

A portion of our building envelope is historic. Can we exclude it from our model?

For an existing building, do I need to rotate the model?

Our project has a large process load—75%. Despite our efforts to make an efficient HVAC design, the cost savings are minimal. What can we do to earn this prerequisite and be eligible for LEED certification? Is there any flexibility in how we model the p

Our process load is higher than 25%. Do we have to justify that?

Our local code references ASHRAE 90.1-2010. Should I use that for my documentation, or 90.1-2007?

Can I claim exterior lighting savings for canopy lighting even though a baseline model cannot include shading elements?

The project is built on a site with existing exterior lighting installed. How should this be accounted for?

Can mezzanines open to floors below be excluded from the energy model?

How do I provide a zip code for an international location?

For a project outside the U.S., how do I determine the climate zone?

For a project outside the U.S., how do I determine the Target Finder score?

Do hotel rooms need automatic light shut-off control?

How commonly are the 90.1 mandatory compliance forms submitted as part of EAp2/EAc1?

The Section 9 space-by-space method does not include residential space types. What should I use?

Can the Passive House Planning Package (PHPP) be used to energy model for LEED?

Can the Trace 700 'LEED Energy Performance Summary Report' by uploaded to LEED Online in lieu of the Section 1.4 tables spreadsheet?

Which baseline HVAC system do I use if my building has no heating or air conditioning?

Our project has a diesel backup generator. Should we include it in our energy model?

Can SHGC be higher in the proposed than in the baseline model?

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