3 ms·

It's been a while since I've studied thermodynamics, but as far as I understand it that sounds like a violation of the second law of thermodynamics.

bell-cot 4y ago
Hydrophilic chemicals are a perfectly legal way to dehumidify. You pay the price (energy) when you pry the water & chemicals back apart.
- CorrectHorseBat 4y ago
  Of course, but as far as I understand this device does exactly that?
  - galangalalgol 4y ago
    Fuel cells and electric motors are vastly more efficient at turning propane into motion than a combustion engine. Its possible they found a dessicant that is particularly easy to reverse at stp. Theymention the absorbing dessicant is exothermic which is unusual I think? And they pump that heat over to regenerate the other dessicant under a slight vacuum. Sounds a bit like the oxygen generators people use for lung conditions, or to weld with.
  - UncleEntity 4y ago
    My understanding is heat from first chamber + external vacuum is used to dry out a second chamber and then the system is reversed when the first chamber is saturated. Energy is being put into the system but it is less than the AC unit cooling humid air on its own so is a net gain relatively speaking.
andbberger 4y ago
it's perfectly legal
udev 4y ago
Sounds like the notion of a condenser coil (a very real device) violates your understanding of thermodynamics. I recommend you look up how heat-pumps work: https://www.nrcan.gc.ca/energy-efficiency/energy-star-canada/about/energy-star-announcements/publications/heating-and-cooling-heat-pump/6817 https://www.nrcan.gc.ca/energy-efficiency/energy-star-canada...
- CorrectHorseBat 4y ago
  Not at all, doing it 30x more efficient than that is what I have issues with.
Dylan16807 4y ago
There's energy to cool the water, there's energy to condense the water, and there's energy to cool the rest of the air. Why would it be a problem to do just the middle one instead of all three?
Bloating 4y ago
Congress changed the law

bell-cot 4y ago

Hydrophilic chemicals are a perfectly legal way to dehumidify. You pay the price (energy) when you pry the water & chemicals back apart.

CorrectHorseBat 4y ago
Of course, but as far as I understand this device does exactly that?
- galangalalgol 4y ago
  Fuel cells and electric motors are vastly more efficient at turning propane into motion than a combustion engine. Its possible they found a dessicant that is particularly easy to reverse at stp. Theymention the absorbing dessicant is exothermic which is unusual I think? And they pump that heat over to regenerate the other dessicant under a slight vacuum. Sounds a bit like the oxygen generators people use for lung conditions, or to weld with.
- UncleEntity 4y ago
  My understanding is heat from first chamber + external vacuum is used to dry out a second chamber and then the system is reversed when the first chamber is saturated. Energy is being put into the system but it is less than the AC unit cooling humid air on its own so is a net gain relatively speaking.

andbberger 4y ago

it's perfectly legal

udev 4y ago

Sounds like the notion of a condenser coil (a very real device) violates your understanding of thermodynamics. I recommend you look up how heat-pumps work: https://www.nrcan.gc.ca/energy-efficiency/energy-star-canada/about/energy-star-announcements/publications/heating-and-cooling-heat-pump/6817 https://www.nrcan.gc.ca/energy-efficiency/energy-star-canada...

CorrectHorseBat 4y ago
Not at all, doing it 30x more efficient than that is what I have issues with.

Dylan16807 4y ago

There's energy to cool the water, there's energy to condense the water, and there's energy to cool the rest of the air. Why would it be a problem to do just the middle one instead of all three?

Bloating 4y ago

Congress changed the law