<snip>Personal highlights includeLEO LH2 propellant depot ZBO via electroluminescent cooling (aka using heat to drive LED's pointing into deep space, I guess a cousin idea to laser cooled solar probes?)https://www.nasa.gov/general/electro-luminescently-cooled-zero-boil-off-propellant-depots/<snip>
Quote from: Asteroza on 01/07/2024 10:49 pm<snip>Personal highlights includeLEO LH2 propellant depot ZBO via electroluminescent cooling (aka using heat to drive LED's pointing into deep space, I guess a cousin idea to laser cooled solar probes?)https://www.nasa.gov/general/electro-luminescently-cooled-zero-boil-off-propellant-depots/<snip>Recall first reading about cooling by laser discharge many years ago in David Brin's Sundiver novel. Which foreshadows the Parker Solar Probe.
Quote from: Zed_Noir on 01/27/2024 08:43 pmQuote from: Asteroza on 01/07/2024 10:49 pm<snip>Personal highlights includeLEO LH2 propellant depot ZBO via electroluminescent cooling (aka using heat to drive LED's pointing into deep space, I guess a cousin idea to laser cooled solar probes?)https://www.nasa.gov/general/electro-luminescently-cooled-zero-boil-off-propellant-depots/<snip>Recall first reading about cooling by laser discharge many years ago in David Brin's Sundiver novel. Which foreshadows the Parker Solar Probe.I think it was exactly in this forum, over 15 years ago, that I asked about the physical possibility of Sundiver's Laser Cooling. Several people told me it violated the 2nd Law of Thermodynamics.edit: oops, I created the topic in April 2010, so ONLY 14 years agohttps://forum.nasaspaceflight.com/index.php?topic=22649.0
Quote from: aceshigh on 02/16/2024 05:59 pmQuote from: Zed_Noir on 01/27/2024 08:43 pmQuote from: Asteroza on 01/07/2024 10:49 pm<snip>Personal highlights includeLEO LH2 propellant depot ZBO via electroluminescent cooling (aka using heat to drive LED's pointing into deep space, I guess a cousin idea to laser cooled solar probes?)https://www.nasa.gov/general/electro-luminescently-cooled-zero-boil-off-propellant-depots/<snip>Recall first reading about cooling by laser discharge many years ago in David Brin's Sundiver novel. Which foreshadows the Parker Solar Probe.I think it was exactly in this forum, over 15 years ago, that I asked about the physical possibility of Sundiver's Laser Cooling. Several people told me it violated the 2nd Law of Thermodynamics.edit: oops, I created the topic in April 2010, so ONLY 14 years agohttps://forum.nasaspaceflight.com/index.php?topic=22649.0I'm not familiar with this particular subject. I have noticed that there are several that seem to be more certain than knowledgeable in other fields. Referring to the quoted sentence of yours that I underlined MY meaning being that it is important to run ones own numbers.
The emitted photons from the LED possess entropy, and can therefore carry heat, by virtue of their spatial and temporal incoherence.
Quote from: redneck on 02/17/2024 10:55 pmI'm not familiar with this particular subject. I have noticed that there are several that seem to be more certain than knowledgeable in other fields. Referring to the quoted sentence of yours that I underlined MY meaning being that it is important to run ones own numbers.Here's a brief technical explanation of the technology:https://www.esa.int/gsp/ACT/projects/electroluminescent_cooling_using_LEDs/
I'm not familiar with this particular subject. I have noticed that there are several that seem to be more certain than knowledgeable in other fields. Referring to the quoted sentence of yours that I underlined MY meaning being that it is important to run ones own numbers.
...Fluidic Telescope (FLUTE)......The Great Observatory for Long Wavelengths (GO-LoW)......Flexible Levitation on a Track (FLOAT)... ...ScienceCraft for Outer Planet Exploration (SCOPE)...