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NC-2009 EAp2:Minimum Energy Performance

LEED V2009 NC - DES Option 1 in Energy Model

Hi,

I am doing the Energy Model for G+5 Floors Office building. The total conditioned area is 90,500 Sq ft. The project is connected with District Cooling Plant and have opted the option 1 of DES Guidance. Currently, I am doing base case energy model and my questions are provided below.

1. In Base Case, I have considered System 8 since the no of floors are higher than 5 & Non-residential. Is it correct? 

(OR)

2. I have to select System 6, because of the conditioned area which is less than 1.5lakhs sq.ft.

3. I have opted the option 1 of DES Guidance.Whether I have to calculate the chilled water rate for basecase & proposed case by using energy simulation software? 

4. Airside systems only have to be modeled in both cases to calculate the chilled water. (i.e. no need to model chillers) is it correct?

5. If the answer is yes for Question 4. How I can calculate the pump energy for both cases.

6. Whether the proposed case's chilled water rate has to match with actual design rate calculated using heat load? How can I manage this with my energy simulation tool?

Kindly advice.

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Marcus Sheffer
LEED Fellow
7group / Energy Opportunities
LEEDuser Expert
4454 thumbs up

Thu, 10/19/2017 - 14:58

Under DES v2 Option 1 you have to model a system #8 in the baseline even if the system would be a system #6 from Table G3.1.1A. See Table 3 in the DESv2. Sounds like your project is a system #8 anyway because it is more than 5 floors. Follow the guidance in the DESv2 document regarding rates, pumps, etc.

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