People of E-Quest:
I am new to the program and am using the Building Wizard. Have an existing
one-story U shaped building with an area of 127,500 ft2. The perimeter is
heated by hot water and the core is gas furnace heated by package rooftop
heat/cool units. There is no reheat to the AC. There is a gas-fired DHW
water heater and storage. The printout shows a significant space gas usage
during the summer not including the DHW. The DHW approximates the actual
DHW of the building. Does anybody have an idea what may be wrong? Hope you
can help.
Burt Swerdling
Could be overcooling, and associated reheat. Check your minimum
settings or flow rates to the zones, check the leaving air temperature
control of the AHUs, etc.
James Hansen, PE, LEED AP
Burt,
To get additional help you will need to send us your .inp and .pd2 files,
preferably zipped together.
Best,
Carol
Burt:
Just a hunch.
In the Wizard, you? do not (as far as I know) have the luxury of temperature reset schedules. Therefore, your heat is available 24/7/365. Your space heating loop is also on a continuous basis, rather than a Demand basis. Therefore, you are circulating space heating hot water to the perimter all the time, at some minimum value to keep the perimeter "ready."
Remove the perimeter heating (make the space unconditioned) and see if your Summer gas goes away.? You can always send the .INP and the .PD2 files to the Forum.? Someone ALWAYS knows a good answer.
Welcome to the Forum.
John R. Aulbach, PE, CEM