jwray

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Member Since: May 9, 2007
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Comments to jwray

siftbot says...

Happy anniversary! Today marks year number 7 since you first became a Sifter and the community is better for having you. Thanks for your contributions!


siftbot says...

Happy anniversary! Today marks year number 6 since you first became a Sifter and the community is better for having you. Thanks for your contributions!


jwray says...

>> ^BoneRemake:

Greetings and Salutations !
I am writing this message in regards to your channel " Future" . I would like to ask that the description be updated, so as to fully explain in point form what the channel may be used for. It may seem to you as though it is self explanatory but I just went to find out if I put my fantastic new video in the proper channel, and I have no answer, the description is lacking substance and could be considered obtuse.
I am sure others have this problem, I do not know if its been said before, but I know for a fact nothing gets done if nothing is said.
Thanks for your time.


Any videos about the future go there. It's unmoderated.

BoneRemake says...

Greetings and Salutations !

I am writing this message in regards to your channel " Future" . I would like to ask that the description be updated, so as to fully explain in point form what the channel may be used for. It may seem to you as though it is self explanatory but I just went to find out if I put my fantastic new video in the proper channel, and I have no answer, the description is lacking substance and could be considered obtuse.

I am sure others have this problem, I do not know if its been said before, but I know for a fact nothing gets done if nothing is said.

Thanks for your time.

Psychologic says...

Theoretically yes, but the efficiency would be terrible with current tech.

If only relying on radiative cooling then the condenser would need to be huge just to cool something the size of a house. Of course, the hotter the coils, the more heat transfer there would be.

Then the radiation would need to be transmitted through the atmosphere. That would heat some of the air along the way, reducing the efficiency of the transfer and further increasing the amount of cooling needed to offset global warming (clouds wouldn't help either).

There's also the fact that the entire process consumes a lot of power to compress the coolant. Currently much of that power comes from sources that emit greenhouse gasses, reducing the net efficiency of the cooling offset. The machinery itself also creates heat, which would need to be offset with additional cooling.

I don't think her idea was "stupid"... she just doesn't understand the difficulties and cost involved. If we had unlimited solar power and extremely efficient large-scale AC farms then it might work, but there's also the unknown side effects of localized cooling on wildlife and the hydrological cycle.

It's a neat idea, and I'd love to run the numbers on it sometime for fun, but it's currently impractical and possibly counter-productive with our current capabilities.

In reply to this comment by jwray:
Ordinary air conditioners could only increase global mean temperature due to the law of conservation of energy. But if the condenser coils are in a vacuum surrounded by glass on top and a mirror on the bottom, then they just radiate into space.

bareboards2 says...

Thanks for this post.

Someone was remarking recently on the good ole days of the Sift, how the quality of the vids has gone down.

It has been so gradual for me I hadn't noticed. But I think it is true. In the early days, there were so many more cool science vids with explanatory comments from the personal experience of the commenter. I couldn't understand what was said half the time but I enjoyed trying.

I've been in a little bit of mourning every since I realized.

Still, this place is significantly better than YT, isn't it? So much more personality and passion and general intelligence. Even our trolls are a bit different -- when you know they like kitties, like, A LOT, it is hard to take the trolling too seriously. They can't be completely anonymous here, and that humanizes them in a way that isn't possible on YT.

Bottom line -- yeah. I liked it better before, too.

jwray: It goes way beyond sexism. All jackass-style shadenfreude videos
should be banned from the sift. Youtube is full of that shit.
What's the point of Videosift if you're going to post that shit here?

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