Users,
In reference to the Pg 108 of 135 in the 3.63 Tutorial, it states "To
calculate the total number of hours outside
the throttlig range, multiply the percentage reported here by the "Hours
Fans ON" reported on SS-E".
I am modeling a School and the percent of hours under throttle range is 12%.
One of the comments from the LEED reviewer was that it would be 1050 hours
(12% of 8760).
The total number of hours the fans are working are 2000 hours.
Would it be right if I send a response back stating the Unmet hours are (12%
of 2000 = 240 hours).
Any comments will be greatly appreciated.
Thanks,
Imran Syed, LEED AP
Imran:
I believe you are correct. ASHRAE-90.1, Appendix G refers to actual number of hours.
However, if you also go the the Airside Tab in eQuest, then hit the Summary Tab below it, then click on the Project Icon in the tree diagram, you will get a zone by zone hours of Heating and Cooling loads not met. A really nifty scoreboard of data.
John Aulbach
I personally use the SS-R report from the sim file. It breaks out which zones have unmet hours and whether or not they are under heated or cooled. It is also a good resource to check how your systems are operating as it includes hours in the part load ranges.
Seth Spangler, LEED? AP