Hi Markus and colleagues,
There are few issues which I'd like to share, with a request for some advice related to the Baseline project modeling.
The project in question is a manufacturing facility for prefabricated foods - chocolates, biscuits, coffee, etc.
It is one whole building construction and it is to belong to System 7 (more than 400 000 sqft). The majority of the rooms/zones are located in one floor (80%) and the rest are in the second floor. There are some administrations parts, kitchen, laboratories - in one word non-manufacturing zones (about 35%) and the rest are the production areas. The issues I'm concerned are:
1. Systems.
For the non-production zones - I'm planning to model them (for the Baseline) as one system per floor, but for the production zones I'm thinking to model them the same way (identically) as they are in the Proposed. The Question is:
In such cases (production zones) should I stick to the G3.1.2.10 (heat recovery) requirements for the Baseline?
2. Plants.
Should I stick to rules applied to System 7 regardless what kind of plants are in the Proposed?
3. Separate (standing alone) service building in the project area.
There are one building for cooling & heating equipment and one building for pump station.
Should I model them separately and identically to the proposed or there are other rules I have to follow?
Your opinion on the issues would be highly appreciated.
Thanks
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5868 thumbs up
October 26, 2015 - 11:59 am
1. Not sure why you would model the space conditioning systems in the production areas identical to the proposed?
2. While there are some connections, you typically model the proposed as designed and the baseline according to Appendix G.
3. I would include all three buildings in the one model. See answer to #2.
Vassil Vassilev
ManagerTermoservice
13 thumbs up
October 26, 2015 - 12:37 pm
Marcus, thanks for the reply.
Regarding 1. - If I understand you correctly, there is nothing wrong if I model the production zones as per App. G - meaning Package rooftop VAV with reheat, regardless that in these zones there are some manufacturing processes like baking ingredients mixing etc.
Thanks.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5868 thumbs up
October 26, 2015 - 12:48 pm
That is correct, the baseline gets modeling according to Appendix G.
If the process areas would result in the application of any of the G3.1.1 exceptions you must model it that way.
In some cases there may be a question about whether the space conditioning is for the process or for the people that participate in the process. This could be a grey area depending upon the process. For example you may have a large oven for baking. This zone would likjely be considered all process even if there was some small component of space conditioning for people. I once worked in a factory that made licorice and the low temperature ovens were very large and people would walk into them. This space would be all process and should be modeled identically.
Vassil Vassilev
ManagerTermoservice
13 thumbs up
October 26, 2015 - 2:02 pm
Thanks for the reply, Marcus,
So the bottom line as I understand it is:
If the production spaces are conditioned for the needs of the process, then these spaces should be modeled identically ?
Thanks
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5868 thumbs up
October 26, 2015 - 3:35 pm
In general yes. Although there could be further grey area in that rule as well.
Perhaps this is a bit more definite - If the production spaces are exclusively conditioned for the needs of the process, then these spaces should be modeled identically.
Vassil Vassilev
ManagerTermoservice
13 thumbs up
October 27, 2015 - 2:04 am
Marcus, thanks a lot for the answer.
Your last definition sounds best, fully agreed.
Thanks.