Real or scam?Cooling from 'sky' - Page 1
Forum section: electronics / general

author: Raj
author_rank: Frequent Contributor
timestamp: July 09, 2018, 05:30:19 am
content: recently,I had this video popping up in youtube suggestion-I am quite suspicious it's gonna be like fontis or solar road or something,but at the same time, I think why would a phd guy destroy his reputation, conjuring up a hoax?

author: larsdenmark
author_rank: Regular Contributor
timestamp: July 09, 2018, 10:50:08 am
content: I have no problems with this tech and how it works. It has been published in Nature after all.Whether or not it'll be economically viable is another thing, but it looks promising.

author: BrianHG
author_rank: Super Contributor
timestamp: July 09, 2018, 05:18:19 pm
content: Discussed weeks ago here:https://www.eevblog.com/forum/chat/harnesing-cold-outer-space-on-the-ground-through-a-transparent-ir-wavelength/Everything you need to know is in the thread.And, it shouldn't be in the dodgy section.

author: G7PSK
author_rank: Super Contributor
timestamp: July 10, 2018, 08:33:23 am
content: Nothing that new really.http://proceedings.asmedigitalcollection.asme.org/proceeding.aspx?articleid=1938851Thermo siphon power generation using ocean water was proposed in the 60's not sure if any was put into action back then but the ASME paper of 2014 claims it is a first.

author: IanMacdonald
author_rank: Frequent Contributor
timestamp: July 12, 2018, 04:02:16 pm
content: This does work, and was used in ancient times to cool water or even make ice.The unfortunate corollary for the climate alarmists is that it's the smoking-gun proof that carbon dioxide is not very effective as a greenhouse gas. If it were, then it would not be possible to cool water this way.

author: BrianHG
author_rank: Super Contributor
timestamp: July 13, 2018, 01:54:00 pm
content: Quote from: IanMacdonald on July 12, 2018, 04:02:16 pmPlease provide the diffusion, absorbent, reflective and transparent spectrum wavelengths maps of CO2at atmospheric pressure so I may compare it to the graph provided in the video...

author: tomato
author_rank: Regular Contributor
timestamp: July 15, 2018, 04:28:13 am
content: Quote from: IanMacdonald on July 12, 2018, 04:02:16 pmThe guy does a pretty good job of explaining how the emitted radiation must be at a certain wavelength for this process to work. In no way does it imply that CO2 is not an effective greenhouse gas.

author: StillTrying
author_rank: Super Contributor
timestamp: July 15, 2018, 02:04:34 pm
content: Quote from: tomato on July 15, 2018, 04:28:13 amAt least one of us thinks he's wrong.https://www.eevblog.com/forum/chat/harnesing-cold-outer-space-on-the-ground-through-a-transparent-ir-wavelength/msg1629317/#msg1629317

author: tomato
author_rank: Regular Contributor
timestamp: July 16, 2018, 11:24:50 pm
content: Quote from: StillTrying on July 15, 2018, 02:04:34 pmYou disagree with the physics?

author: StillTrying
author_rank: Super Contributor
timestamp: July 17, 2018, 12:36:44 pm
content: "You disagree with the physics?"No, the explanation. I suspect it would work with the right type of reflector pointed in the right direction.

author: IanMacdonald
author_rank: Frequent Contributor
timestamp: August 02, 2018, 07:42:44 pm
content: Emitted radiation wavelength range of bulk solids or liquids is is determined by temperature. Essentially, black body law. (A white or transparent object emits less radiation than a black one, but still behaves as a 'black body' in terms of spectrum.)I don't see how that can be vastly different from the range emitted by the Earth's surface. Gases are not 'black bodies' though, and behave differently.Have a play withthisto see how it works. The solid lines are the relative energy distribution by wavelength for an 'ideal black' solid object at a given temperature.