I'm not sure whether I can provide any clear answers, but I am quite
curious to see the answer to your question.
I recall discussing adiabatic heating/cooling in my thermodynamics
courses... it's basically the concept of raising/lowering temperatures
without adding or removing heat, but instead rather through changes in
fluid volume/pressure, right? A real-world example of something akin to
this might be a spraypaint can getting cold as you release its
pressurized contents.
If that's the case, I'm struggling to understand why you might wish to
model such behavior within a building energy simulation... kinda sounds
hazardous to the health of the occupants =)!
Would you please describe your purpose a bit further? Is there a
specific system/situation you are trying to model? This may help others
help you determine a more appropriate tool-of-choice. As a guess, are
you possibly trying to account for cooling in a space due to a
pressurized tank undergoing adiabatic cooling as it releases gas into
another system?
Back to fundamentals, and something I'd like to ask of those more
knowledgeable... I know for certain in DOE2.2/eQuest you can set up a
space with a set volume and with adiabatic (or no) surfaces - which will
account for preventing heat transfer, but I have not been exposed to
DOE2.2/eQuest varying the space pressure/volume over time, so I would
concur that this might not be possible in a literal sense... is this the
case?
I have a baseline model and 11 alternate cases set up in eQuest's life cycle cost analysis menu. When I view the life-cycle cost summary under Reports in Output mode, I only see the baseline and 10 alternates. I can add the last alternate by clicking on it in the Projects/Runs tab, but it bumps one of the other alternates off the list. Anyone know if there is a way to include all 11 alternates, or if eQuest is limited to 10?
When you say adiabatic cooling are you talking about evaporative cooling or something else?
Hi Harakhlaal,
I'm not sure whether I can provide any clear answers, but I am quite
curious to see the answer to your question.
I recall discussing adiabatic heating/cooling in my thermodynamics
courses... it's basically the concept of raising/lowering temperatures
without adding or removing heat, but instead rather through changes in
fluid volume/pressure, right? A real-world example of something akin to
this might be a spraypaint can getting cold as you release its
pressurized contents.
If that's the case, I'm struggling to understand why you might wish to
model such behavior within a building energy simulation... kinda sounds
hazardous to the health of the occupants =)!
Would you please describe your purpose a bit further? Is there a
specific system/situation you are trying to model? This may help others
help you determine a more appropriate tool-of-choice. As a guess, are
you possibly trying to account for cooling in a space due to a
pressurized tank undergoing adiabatic cooling as it releases gas into
another system?
Back to fundamentals, and something I'd like to ask of those more
knowledgeable... I know for certain in DOE2.2/eQuest you can set up a
space with a set volume and with adiabatic (or no) surfaces - which will
account for preventing heat transfer, but I have not been exposed to
DOE2.2/eQuest varying the space pressure/volume over time, so I would
concur that this might not be possible in a literal sense... is this the
case?
NICK CATON, E.I.T.
I have a baseline model and 11 alternate cases set up in eQuest's life cycle cost analysis menu. When I view the life-cycle cost summary under Reports in Output mode, I only see the baseline and 10 alternates. I can add the last alternate by clicking on it in the Projects/Runs tab, but it bumps one of the other alternates off the list. Anyone know if there is a way to include all 11 alternates, or if eQuest is limited to 10?
Thanks,
Coder Myers