[Equest-users] Modeling Boilers
Kevin Kelly
kkelly at r3energy.com
Fri Dec 11 05:48:41 PST 2009
Equest World,
I am trying to fix the boilers in the model and I have a question (both
conceptual and modeling) related to what capacity to model. This is a new
construction project where I am following 90.1 appendix G.
This is what is going on with the heating boilers (I'll use simplified
numbers)
- There are 7 hot water boilers that are used for the HHW (total
capacity of 2500 MBTUH)
- There are a electric fan forced heaters in bathrooms and
stairwells that (70 MBTUH)
- There is a community room in the basement that has a separate
unit that provides both heating and cooling (heating capacity of 70 MBTUH)
- The heat from the boilers is sent mostly through baseboard
radiators and a few hydronic systems (total heating capacity of (1200 MBTUH)
- From the above info, the capacity of the boilers is 2500 while
the total capacity for the heating units that need the hot water is 1200.
o Is this common?
o Did the designer screw up?
o How would you model it in both the baseline and proposed model? (ie
which capacity am I using, or should I just have eQuest autosize the boilers
off of the cooling design?)
I hope this makes sense. Thanks again for everyone's continued help.
Sooner or later I will have enough skills where I can start answering calls
for help like mine.
Cheers,
Kevin Kelly, LEED AP
Energy Systems Analyst
R3 Energy Management
W: 914.909.3940 x115
M: 267.981.5012
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