See all forum discussions about NC-2009 EAp2
 Subscribe to new posts about NC-2009 EAp2 Post a new question aboutNC-2009 EAp2
See LEEDuser’s guidance on NC-2009 EAp2»
FAQs about EAp2 :

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

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

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

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

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

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

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

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

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

Do I need to justify the electrical and fuel rates I am using in my model?

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?

View answers »

Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Baseline modeling for manufacturing facility

Hi Markus and colleagues, There are few issues which I'd like to share, with a request for some advice related to the Baseline project modeling. The project in question is a manufacturing facility for prefabricated foods - chocolates, biscuits, coffee, etc. It is one whole building construction and it is to belong to System 7 (more than 400 000 sqft). The majority of the rooms/zones are located in one floor (80%) and the rest are in the second floor. There are some administrations parts, kitchen, laboratories - in one word non-manufacturing zones (about 35%) and the rest are the production areas. The issues I'm concerned are: 1. Systems. For the non-production zones - I'm planning to model them (for the Baseline) as one system per floor, but for the production zones I'm thinking to model them the same way (identically) as they are in the Proposed. The Question is: In such cases (production zones) should I stick to the G3.1.2.10 (heat recovery) requirements for the Baseline? 2. Plants. Should I stick to rules applied to System 7 regardless what kind of plants are in the Proposed? 3. Separate (standing alone) service building in the project area. There are one building for cooling & heating equipment and one building for pump station. Should I model them separately and identically to the proposed or there are other rules I have to follow? Your opinion on the issues would be highly appreciated. Thanks

0
Post a reply

You rely on LEEDuser. Can we rely on you?

LEEDuser is supported by our premium members, not by advertisers.

Go premium for $15.95  »

Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Mon, 10/26/2015 - 15:59

1. Not sure why you would model the space conditioning systems in the production areas identical to the proposed? 2. While there are some connections, you typically model the proposed as designed and the baseline according to Appendix G. 3. I would include all three buildings in the one model. See answer to #2.

Mon, 10/26/2015 - 16:37

Marcus, thanks for the reply. Regarding 1. - If I understand you correctly, there is nothing wrong if I model the production zones as per App. G - meaning Package rooftop VAV with reheat, regardless that in these zones there are some manufacturing processes like baking ingredients mixing etc. Thanks.
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Mon, 10/26/2015 - 16:48

That is correct, the baseline gets modeling according to Appendix G. If the process areas would result in the application of any of the G3.1.1 exceptions you must model it that way. In some cases there may be a question about whether the space conditioning is for the process or for the people that participate in the process. This could be a grey area depending upon the process. For example you may have a large oven for baking. This zone would likjely be considered all process even if there was some small component of space conditioning for people. I once worked in a factory that made licorice and the low temperature ovens were very large and people would walk into them. This space would be all process and should be modeled identically.

Mon, 10/26/2015 - 18:02

Thanks for the reply, Marcus, So the bottom line as I understand it is: If the production spaces are conditioned for the needs of the process, then these spaces should be modeled identically ? Thanks
Profile picture for user sheffer
Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Mon, 10/26/2015 - 19:35

In general yes. Although there could be further grey area in that rule as well. Perhaps this is a bit more definite - If the production spaces are exclusively conditioned for the needs of the process, then these spaces should be modeled identically.

Tue, 10/27/2015 - 06:04

Marcus, thanks a lot for the answer. Your last definition sounds best, fully agreed. Thanks.

Add new comment

To post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.