The issues is related to the cooling.
Greetings,
The project pursuing LEED CI is renting an floor area, part of a building with a central cooling plant with a cold water chiller and fan-coils. The cooling however are not sufficient, so the design team is suggesting to the Owner to leave some of the fan-coils connected to the existing chiller and to add an independent VRV systems to satisfy fully the future cooling needs.
The questions is:
Is it possible part of the rented floor areas to be connected to the existing chiller and how (as purchase cold water or…) whereas the remaining areas to be assigned to new VRV system.
Your opinion will be highly appreciated.
Thanks.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5907 thumbs up
July 24, 2018 - 11:04 am
Sounds possible to me. For CI projects the Reference Guide contains the procedure involved with modeling a central plant system for your CI space. You select the baseline system based on the entire building and them you proposition the loads for your space. There are two methods, as I recall, depending on whether your space has similar or dissimilar loads to the rest of the building.
Vassil Vassilev
ManagerTermoservice
13 thumbs up
July 24, 2018 - 11:25 am
Hi Marcus,
Thanks for the reply.
The rest of the building has not been certifies, hence it'll be hardly possible to estimate any similarity of any loads to our project.
I'm wondering if we could apply the approach of purchase cold water to the part of our project that will be assigned to the existing chiller. We'll try to get some cost paid for the provided cooling, because from the other side it's not sure what kind of data we could find for the existing chiller - I mean COP. etc.
Your opinion is highly appreciated.
Thanks.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5907 thumbs up
July 24, 2018 - 11:46 am
Is the building an office building? If so the loads should be similar. You must follow this method in CI, so you need to find out how similar, or not, the loads will be in the rest of the building.
No I do not think a purchased energy approach works in this case. The Reference Guide is pretty clear about what you need to do.