[Bldg-sim] Basic Questions
Kurt Creamer
kcreamer at nc.rr.com
Sun Sep 11 09:25:57 PDT 2011
Hi all,
I had a couple of questions I was hoping to get some help with:
1. What is the difference between a "Facility" and a "Building" in
EnergyPlus? I created a very simple building in EnergyPlus and am seeing a
large difference between the facility electricity usage and building
electricity usage. I have not outdoor lighting. What would be included in
facility usage that would not be included in building usage?
2. I created the building referenced above with DesignBuilder, choosing an
LPG heating system with a COP of 0.8. I wanted to do some further
manipulation in EnergyPlus so I exported the file as an IDF file. In doing
so, it looks like the heating system was modeled as an Ideal Loads Air
System. If I understand this Ideal Loads Air System correctly, the load
calculated in EnergyPlus is simply the amount of heating energy output
required for heating purposes, and does not utilize the COP I entered in
DesignBuilder -- is that correct?
3. I can select the Ideal Loads Air Heating Energy as a variable to be
output in the *.csv file of all the variables, but cannot get it to appear
in the meter file. After the run, "HVAC,Sum,Ideal Loads Air Heating Energy
[J]" shows up in the *.RDD file but not the *.MDD file. Is there a way to
make this info show up in a meter file?
4. Is there an easy way to set up a meter that would simply mimic a natural
gas or propane bill that simply shows therms or gallons?
Thanks,
Kurt Creamer
Apex, NC
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