Why is absorption AC not used in cars?

[freebeard]

https://duckduckgo.com/?q=active+solar+cooling&ia=web

Weak active solar cooling would be using solar heat to dry a dessicant.

https://www.sciencedirect.com › science › article › pii › B978008025388650060X
ACTIVE SOLAR COOLING - ScienceDirect
In adsorption cooling systems an adsorbent absorbs moisture from the air, then the air temperature is decreased by evaporative cooling. In other words, the air is cooled by first removing moisture then adding it. The drying agents can be regenerated using solar energy. Silica gel and active charcoal are two solid absorbents in common use.

Strong active 'solar' cooling would beam the heat directly to the cold darkness of Outer Space.

www.youtube.com/results?search_query=space+cooling

[aerohead]

Originally Posted by freebeard

https://duckduckgo.com/?q=active+solar+cooling&ia=web

Weak active solar cooling would be using solar heat to dry a dessicant.


Strong active 'solar' cooling would beam the heat directly to the cold darkness of Outer Space.

www.youtube.com/results?search_query=space+cooling

The greenhouse effect is making that increasingly problematic. The long-wave radiation is just bounced back.

[freebeard]

Did you look any any of the linked material?

any sky-facing surface will release
energy into the atmosphere which absorbs
some of that heat
but there's a cool hole between the 8
and 13 micrometer wavelengths where the
emitted heat goes past the atmospheric
barrier and actually reaches outer space

youtu.be/pq8xDXkbXZs?t=159

Clouds are no impediment.

[aerohead]

Originally Posted by freebeard

Did you look any any of the linked material?


youtu.be/pq8xDXkbXZs?t=159

Clouds are no impediment.

I did NOT look at any links.
I don't have my workbook with me today. What do those specific wavelengths represent?

[freebeard]

You obviously have a web browser. Quoth DDG:

https://www.chegg.com › homework-help › questions-and-answers › wavelengths-8-12-micrometers-called-atmospheric-window-earth-s-atmosphere-mostly-transpare-q48386793
Solved The wavelengths from 8 to 12 micrometers are called | Chegg.com
The wavelengths from 8 to 12 micrometers are called the atmospheric window because the Earth's atmosphere is mostly transparent to the radiation of the Earth's surface for these wavelengths. The exception to this rule is that between wavelengths of 9 and 10 micrometers the atmosphere absorbs some of the outgoing radiation from the Earth's ...

https://www.e-education.psu.edu › eme810 › node › 455
3.2. Basic Rules of Light Quantification | EME 810: Solar Resource ...
The gap between 8-13 micrometers (8,000-13,000 nm) is called the atmospheric window, or the sky window, where the molecules CO2 and H2O do not absorb or reflect, and through which a portion of the longwave band can escape. Soon, we will design terrestrial emitters to selectively send energy out the window.

[cRiPpLe_rOoStEr]

Originally Posted by aerohead

My parents home in Lubbock, Texas had an Arkla-Servel, gas-fired, ammonia refrigeration cycle air conditioning system from the 1960s, cooling 2,400-sq-ft.

Interesting. I'm aware of some gas-powered air conditioning machines, yet it's often mentioned as environmentally-friendly and operating in a way similar to the air-cycling featured to airliners, not requiring any refrigeration fluid.

Aside from a pump moving a glycol coolant to and from the A-Coil, it was just an overgrown version of the RV, dual-mode refrigerator.

But was it dual-mode, or gas-powered only?

[Piotrsko]

According to some of the online calculators thats 2979 giga hz or aka part of the infarred light band. How does one generate that signal and then radiate it efficiently?

Perhaps ten million bathroom light bulbs in an Aricibo style dish reflector?

[freebeard]

How does one generate that signal and then radiate it efficiently?

It's not a signal, it's heat. Sort of the opposite.

https://www.skycoolsystems.com/technology/

Dual-Mode Film serves numerous applications

• Applied to outdoor batteries or electronic boxes
• Applied to outdoor shaded structures
• Applied on metal roofs
• Applied to refrigerated trucks or other vehicles

It's a foil with alternating layers of two materials. Something like a vinyl wrap that works better than Ultrawhite paint.

[Piotrsko]

That's exactly my point: heat so far isn't capable of being focused in a tight long distance beam in a certain direction, but it will form a plume, uncontrolled. It will tend to stop about 100 miles up at the end of the atmosphere so I cant see how it is radiated into space from there. So a huge bonfire can radiate, but betcha the sideways impacts from an omnidirectional radiation is worse.

[freebeard]

I don't follow your thinking.

Harvesting solar input is directional, radiating therough the Atmospheric Window is omnidirectional.

Your huge bonfire radiates at a lower frequency than the Atmospheric Window.

https://www.quora.com › What-types-of-infrared-radiation-does-fire-emit?share=1
What types of infrared radiation does fire emit? - Quora
The types of infrared radiation will be dependent upon on how high the temperature can reach or how hot the fire can be produced.. since infrared wavelength can be anywhere from 0.7 to 10 microns of the electromagnetic frequency spectrum.. Horace Tucker Former Physics Teacher (1975-1978) Author has 5K answers and 1.9M answer views 9 mo

Sounds like the difference between near and far infrared.