FAQs about EAp2 :

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?

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?

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?

View answers »

Forum discussion

NC-2009 EAp2:Minimum Energy Performance

Process Loads

Hello, I am modeling a Winery, where most of the chillers and boilers are used for process tasks. I am using HAP to model this building, and I have this questions regarding the best way to model these chillers and boilers, because as I understand they are process loads: 1. In the first place we are using heat pump chillers, that generate chilled and hot water at the same time. These chillers are much more efficient than those indicated in ASHRAE 90.1-2007. So I believe that we may take advantage of this situation in determining the energy savings between the process load of the proposed building and the baseline building. Is this right? 2. If I take these chillers as regular chillers in the software this energy efficiency will be reflected in the final calculations, but they are not going to be taken as “Process Loads”. 3. An alternative that I consider is to model each of these chillers independently, with the actual data for the proposed building and the chiller an boiler indicated in Appendix G. And then manually calculate Process Loads and savings. This way we may reflect energy savings and Process Loads percentage. I will appreciate any comments or recommendations on this issue, Thank you,

0

You rely on LEEDuser. Can we rely on you?

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

Go premium for $15.95  »

Tue, 08/01/2017 - 14:42

1. Usually the baseline for a process chiller would be the minimum efficiency of the same type of chiller in 90.1. I don't think heat pump chillers are in 90.1-2007. You might want to check future versions to see if they were added. If so use that minimum for the baseline. if not then you will need to provide some sort of additional justification for the selection of your baseline. 2. There should be a way to separate this energy use as a process load within the software. 3. Post-processing the modeled data could certainly be possible. Make sure to explain the calculations and assumptions. Usually the biggest issue with process load savings is the justification of the baseline. Don't just assume a baseline. It must be justified as standard industry practice for a similar facility in your location.

Tue, 08/01/2017 - 15:11

Hi Marcus, this has been very helpful, I will check in later editions of the standard to see if heat pump chillers already exist, thank you,

Add new comment

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