Forum discussion
NC-2009 EAp2: Minimum Energy Performance
The fan power calculated by the formula presented in APPENDIX G3.1.2.9 of ASHREA90.1-2007 is the sum of all the fan power including supply fan,returen fan,exaust/relief fan.
However,in the simulation program eQuest,the fan power should be input individually by the means of "kw/cfm" or "pressure and efficiency".So the fan power input in eQuest cannot according the formula presented in APPENDIX G3.1.2.9 perfectly.Does USGBC accept the result calculated by the simulation program?
LEEDuser is supported by our premium members, not by advertisers.
Go premium forTo post a comment, you need to register for a LEEDuser Basic membership (free) or login to your existing profile.
A portion of our building envelope is historic. Can we exclude it from our model?
For an existing building, do I need to rotate the model?
Our process load is higher than 25%. Do we have to justify that?
Our local code references ASHRAE 90.1-2010. Should I use that for my documentation, or 90.1-2007?
Can mezzanines open to floors below be excluded from the energy model?
How do I provide a zip code for an international location?
For a project outside the U.S., how do I determine the climate zone?
For a project outside the U.S., how do I determine the Target Finder score?
Do hotel rooms need automatic light shut-off control?
How commonly are the 90.1 mandatory compliance forms submitted as part of EAp2/EAc1?
The Section 9 space-by-space method does not include residential space types. What should I use?
Can the Passive House Planning Package (PHPP) be used to energy model for LEED?
Which baseline HVAC system do I use if my building has no heating or air conditioning?
Our project has a diesel backup generator. Should we include it in our energy model?
Can SHGC be higher in the proposed than in the baseline model?
Marcus Sheffer
LEED Fellow7group / Energy Opportunities
LEEDuser Expert
5907 thumbs up
March 14, 2011 - 9:04 am
eQUEST can calculate this perfectly. You will need to do a modeling run to size the supply CFM according the G3.1.2.8. Using those results the fan power is calculated for each system according to G3.1.2.9 (CFM comes from SV-A DOE2 report). Assuming all CFM is being applied to a supply fan, divide the kW by the CFM and use that as your eQUEST input.
This is a bit of a simplification but hopefully it will get you started.