Hi all,
Thanks for the responses on the ASHRAE query. I was able to feed in
the right inputs into the eQuest model based on your comments and suggestions.
Continuing on the same topic I had one concern, regarding the budget
model for the proposed design. For the Energy Cost Budget calculations two
simulations will have to be run, one with the proposed case and the other
the budget case based on ASHRAE 90.1 standards. In case of the budget simulation
model, ASHRAE 90.1 lists the EER's of the packaged units which includes the
fan energy.
When doing the model for the budget case I chose the system types
as per the ASHRAE 90.1 selection table. Now I have the EER for the packaged
units in my case System 11. But how do I model the fan energy for the budget
case. I would have to first determine the CFM for the supply fans and the
cooling capacity of the unit.
I tried one approach and I do not know whether it is the right way
to go or not.
I modeled a Packaged Single Zone system with the ASHRAE 90.1 EER.
Assigned a 0 value to the fan energy so that there is no fan energy. and
ran the eQuest Model. Then from the SS-P report I used the CFM and cooling
capacity calculated by the program to determine the appropriate fan energy.
Also in this process I used the ASHRAE 90.1 guideline for the fan HP to be
1.2HP/1000 cfm for upto 20,000 cfm. So using the cfm reported on the SS-P
I calculated the fan HP for the budget case, and using the cooling capacity
calculated the EER for the system excluding the fan energy.
Then I plugged in the individual values and ran the simulation model
for the budget building.
Any suggestions to if this approach is appropriate or not.
Thanks
Nikhil
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