See all forum discussions about NC-v4 EAp2
 Subscribe to new posts about NC-v4 EAp2 Post a new question aboutNC-v4 EAp2
See LEEDuser’s guidance on NC-v4 EAp2»
FAQs about EAp2 :

Do the required savings for this prerequisite (and credit) need to come only from building energy, or also process loads?

Our project doesn't have enough energy savings to earn the prerequisite. Can we get there by incorporating onsite renewables?

Our proposed design has insulation R-values that are below those prescribed by ASHRAE 90.1-2010. Can we still meet the prerequisite?

View answers »

Forum discussion

NC-v4 EAp2:Minimum energy performance

Baseline Model for Data center Economizer

Hi, 

I have encountered an issue with the baseline model for Data Center , based on LEED Comments we are using system 8 and for climate zone 5a the economizer shut off limit is 70F, the data center that i am working on is in Chicago where 7100 hrs in the year are below 70 F, which means that baseline system is using free cooling when our proposed system dont have an economizer, what can I do in that case? Like we are not able to even get minimum savings as baseline is getting free cooling.

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  »

Default Avatar
Moses Chong
Mechanical Engineer
WSP
LEEDuser Basic Member
2 thumbs up

Tue, 08/08/2023 - 16:55

it will be the question for the mechanical engineers. Ask them why are they not cooling the building with air side economizer. Do they have water-side economizers? I've worked on couple data center projects that dont have air-side economizers yet still show savings. One of them has very efficient chillers and the other one has evaporative cooling. Besides the HVAC system, you can also get credit for using efficent electrical/server system that can be documented with this spreadsheet https://www.usgbc.org/resources/minimum-energy-performance-data-center-calculator. This will be an exceptional calculation. Good luck.

Add new comment

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