When modeling an industrial building, I am trying to implement a
increase in the baseline temperature setpoint for summer cooling. To do
so I increased the setpoint in the HVAC Air-side system entry from 70 to
74 and therefore the building should be using less energy to cool the
building (located in Massachusetts) in the summer time.
Why in this case is the energy usage (for space cooling) increasing
after implementing this energy-saving measure?
I can send over a building file if need be to analyze my problem.
Thanks,
Sam Alpert
what is the HVAC system type? A building file would be helpful in answering
your question.
Also, are you resetting the temperature in the thermostat schedule, or just
in the HVAC system tab? Try resetting the temperature in the schedule and
leaving the HVAC system input unchanged.
--
Karen
ALWAYS send the .PD2 and .INP for eQuest, or just the .INP file for
DOE-2.1E.
Otherwise, it is like asking a doctor what is wrong with me without an
examination.
Please..
Not your usual building model..
Has anyone ever attempted this? There is a device called a heat
retention curtain that can lower gas bills for greenhouses. There
actually is a US Department of Agriculture simulation called Virtual
Grower.
http://www.ars.usda.gov/services/software/download.htm?softwareid=108
This program is primarily for simulating plant growth, but as a
sidelight, calculates monthly and annual energy use to heat the
facility. It uses TMY2 data, and considered:
1) Transmission losses
2) Solar heat loads
3) Infiltration and wind effects
So it almost seems like an eQuest type hourly simulation.
Except that they report energy in a strange way (got the plant growth in
great detail, but not the energy use).
So I go back to the tried and true eQuest. But I have no data to
calibrate the results again.
So I turn to my well versed and battle tested colleagues.
Have YOU every done this type of model?
John R. Aulbach, PE, CEM