Hi,
We have an office building and it's data center room has a DX cooling with refrigerant economizer. Per the manufacturer's guidelines the approved performance compliance with T24 is by modeling a basic efficient chilled water plant with an integrated water economizer; as per the directions in page 6 in the following link: https://www.vertivco.com/globalassets/products/thermal-management/room-c.... The plant inputs had to be assumed as in reality there is no chiller plant serving the building.
Our project is going for LEED using EnergyPro and i would like to have your inputs on the following:
1) Would the same approach work for 90.1 compliance - LEED?
2) Upon an online search I've found a few references to projects that have used the same systems for their data centers, thus no specific modeling references were mentioned for compliance with LEED. Do you have any references of projects that have used similar systems?
3) Any other recommendations on the modeling approach/references/guidance.
Thank you,
Kind Regards,
Maria
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
July 19, 2017 - 10:41 am
1. Yes it should work. What you are describing is a work around. This requires you to follow G2.5 as an exceptional calculation. So provide a copy of the document in your LEED submission along with a narrative explaining what you have done.
2. I am not aware of any.
3. You should check out this spreadsheet in conjunction with your efforts to show savings. It may help you establish a reasonable baseline if you are trying to show savings associated with this system. https://www.usgbc.org/resources/minimum-energy-performance-data-center-c...
Fatou Jabbie, | Technology | Design and Engineering Plan Reviews | Energy Code Compliance | Sustainability | LEED AP BD+C
Founder and PrincipalUSL Technology Inc.
3 thumbs up
February 5, 2019 - 3:27 pm
Marcus, can you provide some insights on NC 2009, with this on Prereq, between the Minimum Energy Performance for Data Center spreadsheet, the Minimum Energy Performance Calculator (MEPC) excel calculator, .. can a project still comply without using software to develop an energy model? Or can the project comply with using either of these two spreadsheet calculations?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5909 thumbs up
February 5, 2019 - 3:56 pm
So the MEPC for data centers contains a tab that you can use to calculate savings relative to an approved baseline for the IT portion of a data center. The regular MEPC is used to document the energy modeling inputs and the results. The only significant difference is that one deals directly with data centers and the other does not. Neither one is primarily a set of spreadsheet calculations. They both are primarily a document used to summarize the inputs and results of your energy model. They are not a substitute for an energy model. Projects must use energy modeling software that qualifies under Appendix G Section G2.2.