Does EE4 generate hourly consumption data (kWh) reports? I cannot seem to
find this in either the .sim files or as an option to include anywhere.
Thanks
Unfortunately, EE4 does not generate hourly reports.
Attached is a .pdf of a procedure I wrote up for creating an hourly
report on total enduse kW (as required by HPNC) from an EE4 file. It
requires running your simulation in DOE outside of EE4 and describes
that too.
I am trying to model a packaged VAV rooftop unit with fan-powered boxes in the perimeter zones. After hours the RTU fans are off and the fan-powered boxes cycle to maintain the night setback temperature.
How can I correctly model the fan energy for this system in EE4?
When I select "Packaged VAV" as my system type there is no option to enter any fan energy at the zone level.
What should I use for a fan schedule and what should I put under "Fan Operation" at the system level?
Currently I do not have the terminal fans entered anywhere, just the RTU fans. I am not sure if I am over estimating the fan energy because the RTU fans are cycling to maintain night setback; or if I am under estimating the fan energy because there are no fans operating at night.
Also, if I have an exhaust fan in my RTU in addition to the supply fan and return fan, should I include it with my supply fan or with my return fan?
Thanks,
Brian Tysoe M.A.Sc., P.Eng., LEED AP
Brian Tysoe M.A.Sc., P.Eng., LEED AP
Associate, National Manager of Energy Modelling Services
MCW Consultants Ltd.
Queen’s Quay Terminal
207 Queen’s Quay West, Suite 615
Toronto, ON, Canada M5J 1A7
Phone: (416) 598-2920 ext:519
Fax: (416)
You could try entering the fan power as a sensible process load on perimeter zones. You'd also need to come up with a custom process schedule to estimate cycling. Of course this is regulated load so it should be taken out of the equipment end use and added to fans.
Just a thought, but a packaged VAV system is a cold deck system, so I don't think the fans cycle on to maintain a heating setpoint. Instead, the terminal heat would come on.
I haven't used EE4 recently, but with eQUEST, you can model the system
explicitly as a series fan powered VAV, and input the fan power for the
boxes directly.
You can't directly model this system in EE4. The only solution is to
create your project in EE4 then edit the proposed .DOE file to add in
the series fan powered box statements at each zone. You then have to
run the file from the command line.
Brad,
Unfortunately, EE4 does not generate hourly reports.
Attached is a .pdf of a procedure I wrote up for creating an hourly
report on total enduse kW (as required by HPNC) from an EE4 file. It
requires running your simulation in DOE outside of EE4 and describes
that too.
Hope this helps.
Brian
Hi,
I am trying to model a packaged VAV rooftop unit with fan-powered boxes in the perimeter zones. After hours the RTU fans are off and the fan-powered boxes cycle to maintain the night setback temperature.
How can I correctly model the fan energy for this system in EE4?
When I select "Packaged VAV" as my system type there is no option to enter any fan energy at the zone level.
What should I use for a fan schedule and what should I put under "Fan Operation" at the system level?
Currently I do not have the terminal fans entered anywhere, just the RTU fans. I am not sure if I am over estimating the fan energy because the RTU fans are cycling to maintain night setback; or if I am under estimating the fan energy because there are no fans operating at night.
Also, if I have an exhaust fan in my RTU in addition to the supply fan and return fan, should I include it with my supply fan or with my return fan?
Thanks,
Brian Tysoe M.A.Sc., P.Eng., LEED AP
You could try entering the fan power as a sensible process load on perimeter zones. You'd also need to come up with a custom process schedule to estimate cycling. Of course this is regulated load so it should be taken out of the equipment end use and added to fans.
Just a thought, but a packaged VAV system is a cold deck system, so I don't think the fans cycle on to maintain a heating setpoint. Instead, the terminal heat would come on.
Regards,
Kyle
I haven't used EE4 recently, but with eQUEST, you can model the system
explicitly as a series fan powered VAV, and input the fan power for the
boxes directly.
You can't directly model this system in EE4. The only solution is to
create your project in EE4 then edit the proposed .DOE file to add in
the series fan powered box statements at each zone. You then have to
run the file from the command line.
Chris Jones