adiabatic cooling

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ADIABATIC COOLING

Seems to me there is no way to simulate adiabatic cooling in eQuest.

Maybe I need to use EnergyPlus or TRNSYS for this purpose.

Perhaps someone knows otherwise.

harakh laal's picture
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When you say adiabatic cooling are you talking about evaporative cooling or something else?

Vikram Sami2's picture
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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.

Nick-Caton's picture
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Joined: 2011-09-30
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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

Coder Myers's picture
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Joined: 2011-10-02
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