I won't comment on your first question, but as for the second question why natural gas intensity for HVAC never goes to zero, have you checked whether there's any reheat going on during the summer? You said you're looking at an pre-1980's vintage building. In those days, there was quite a bit of reheat with Constant Volume systems.
Joe
Joe Huang White Box Technologies, Inc. 346 Rheem Blvd., Suite 205A Moraga CA 94556 yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx http://weather.whiteboxtechnologies.com for simulation-ready weather data (o) (925)388-0265 (c) (510)928-2683 "building energy simulations at your fingertips"
Hi, everyone!
I'm now doing a simulation using DOE medium office building,pre-1980 model. One important value I need to find out is the EUI for heating,but I came across some problems of identifying it. I'll be really appreciate if anyone could kindly help me on this.
In this model, heating is supplied only by gas. There is an item called 'Natural Gas End Use for Heating' in the results report (html file), and an item called 'Natural Gas Intensity for HVAC'. Shall I get the heating EUI by 'Natural Gas End Use for Heating/ Area', or shall I use 'Natural Gas Intensity for HVAC' as heating EUI?
What I really confused about is that 'Natural Gas Intensity for HVAC' is calculated from '(Natural Gas End Use for Heating+Natural Gas End Use for Water System)/Area' , but water system is not supposed to be part of HVAC system...Does anyone know why it's like that?
One last point to add, I changed heating setpoints, found out that no matter how low the setpoint is(even 32 degree F), 'Natural Gas End Use for Heating' and 'Natural Gas Intensity for HVAC' are not equal to 0, they could not go down after reaching certain values (when the setpoint is approximately 60). It's another problem I need be helped with.
Thank you so much!
Best,
LELE
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Posted by: Joe Huang <yjhuang@xxxxxxxxxxxxxxxxxxxxxxxx>
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