Hello,
My production line space in our project have an supply fan, exhaust fan and make-up fan to supply OA in conditioned space. All of the fans is operate continuously during occupied periods.
Normally, baseline fan power should be modeled using a portion of the system fan power allowance.
Where can I put make-up fan power in Table 1.4.7A because the form have only supply, return/relief and exhaust ? Can I grouping between make-up and exhaust fan ?
Now my simulation model use only the ratio between supply and exhaust fan. For OA I put the flow but make-up fan power was added to meter side identically in baseline and proposed case.
I used eQUEST for simulated this project.May be it was not correct method.
You rely on LEEDuser. Can we rely on you?
LEEDuser is supported by our premium members, not by advertisers.
Go premium for
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5915 thumbs up
September 23, 2016 - 2:28 pm
Normally the supply fan bring in the OA. So I would proportion the fan power in the baseline the same as the Proposed fans except that I would add together the make-up air fan and the supply fan. The exhaust fan power would be what is left over. Report it as modeled in Table 1.4.7A.
The make-up fan sounds like a part of the system so it should not be modeled identically.
Let me run through an example. Suppose you had a 2 kW supply air fan, a 1 kW make-up air fan and a 1 kW exhaust fan. Add the SA and MUA fans. So now you have a 3:1 ratio of fan power. Do your baseline fan calculations and then proportion the baseline fan power between supply and exhaust with a 3:1 ratio as well. You should not model the make-up air fan in the baseline at all, just supply and exhaust.