Greetings,
The project we are modeling is a huge one - a little more than 900 000 sq ft and it is not C&S. Up to third floor (including two basement and two above ground floors) all areas are connected.
As of third floor, the building is split into three independent corpuses (independent also in respect to the HVAC systems).
Modeling the project as a whole (following that the Baseline systems should be one for each floor - system 7) it will be rather slow due to the huge calculation volume imposed to the modeling software, especially when calculating all the 8760 hours, etc.
The question is:
Could we split the building into 4 parts - one for the common areas (up to 3th floor part,) and one for every corpus. The calculation results afterwards will be assembled in the Minimum Energy Performance Calculator.
Following the above suggested approach we’ll minimize the eventual errors and software problem that might arise and at the same time we are complying the appendix G requirement of modeling system 7 (which is the project's system).
Looking forward to your advice.
Thanks.
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Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
May 11, 2017 - 9:44 am
You could probably do so if the sections had completely independent HVAC and the connections between the pieces was all adiabatic.
Vassil Vassilev
ManagerTermoservice
13 thumbs up
May 11, 2017 - 2:12 pm
Thanks for the reply Marcus,
Could you please tell me what you mean by “connections between the pieces was all adiabatic”.
As I've mentioned the three building parts are completely HVAC independent, just the areas below third floors are structurally connected. That was the reason why I’ve suggested to split into 4 parts.
Your comments are highly appreciated.
Thanks.
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5867 thumbs up
May 11, 2017 - 2:41 pm
Adiabatic - relating to or denoting a process or condition in which heat does not enter or leave the system concerned.
If the connection between the pieces has the same temperature setting and therefore heat will not flow from one section to another, then it is adiabatic. you should be able to set up your model so that this is the case.