Navitron Renewable Energy and Sustainability Forum

Announcements & News => Astronomy & Science => Topic started by: stannn on January 01, 2017, 10:37:45 AM



Title: Changing the batteries on the ISS is a complex task.
Post by: stannn on January 01, 2017, 10:37:45 AM
http://spaceflightnow.com/2017/01/01/space-station-battery-work-starts-new-years-eve/


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: Pat_ on January 01, 2017, 10:42:09 AM
I wonder what they do with the old ones.


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: desperate on January 01, 2017, 11:52:55 AM
I wonder what they do with the old ones.


Chucked overboard according to the blurb :fume  I bet if they left them by the front gate it wouldn't be too long before the pikeys grabbed them wackoold

I guess a few kilos more cr*p in the atmosphere is neither here nor there after launching all that junk up there in the first place.

Desp


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: Scruff on January 01, 2017, 12:03:03 PM
I guess a few kilos more cr*p in the atmosphere is neither here nor there after launching all that junk up there in the first place.

Add that to the other 500 000 (https://www.nasa.gov/sites/default/files/styles/ubernode_alt_horiz/public/4-8-nrc-evaluates-nasas-orbital-debris-programs.jpg?itok=WjRK0aIm)

(https://www.nasa.gov/sites/default/files/styles/ubernode_alt_horiz/public/4-8-nrc-evaluates-nasas-orbital-debris-programs.jpg?itok=WjRK0aIm)


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: desperate on January 01, 2017, 12:12:33 PM
Yes, isn't  it sad how our trail of detritus grows ever wider.

Desp


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: Pat_ on January 01, 2017, 12:17:32 PM
It makes the movie 'Gravity' seem more realistic. Imagine being hit by a car battery at several hundred miles per hour!


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: stannn on January 01, 2017, 01:05:14 PM
A Japanese solution.
http://www.space.com/35059-japan-space-junk-tether-tech.html


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: Scruff on January 01, 2017, 01:26:08 PM
Better off mining it.

It's a bit like them petrol leaf blowers if you ask me...creating COČ to clean COČ.... wackoold


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: johnrae on January 01, 2017, 02:51:18 PM
Now there's an opportunity for Mr Dyson's whizz kids  -  a space vacuum (pun excused)


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: Scruff on January 01, 2017, 02:58:58 PM
Singularity Engines?

(https://i.ytimg.com/vi/h1Gm5OGqw3U/maxresdefault.jpg)


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: pdf27 on January 02, 2017, 12:03:32 AM
Junk gets loaded into the progress supply vessel, which is sent down to burn up in the atmosphere when a new one is due. The cost of making the Progress supply ship capable of surviving re-entry would be horrific due to the extra weight needed.


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: Philip R on January 02, 2017, 01:06:34 PM
The space junk is de-orbitted in the progress vessel. Not turned into shrapnel shards by the deliberate crashing of satellites by the new kids on the space bloc.
Interesting read up on nickel hydrogen batteries on wiki. Robust but has high self discharge. Hope the new batteries are reliable.
Philip R


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: Scruff on January 02, 2017, 02:26:43 PM
Self discharge is not a bit issue in space. Gallium arsenide PV and no clouds.
Flywheel batteries are interesting too.


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: EKE_38BPM on January 26, 2017, 11:17:40 PM
In the first year of hybrid Formula One cars, every team apart from Williams used chemical batteries but Williams developed and used flywheels the store the kinetic energy released during braking and deployed it to give the car a boost.

If I remember properly, it worked OK, but was only used for a season. The Williams flywheel system was used in a Porche one make race series and is used on some buses.
The flywheel spun at something crazy like 100,000rpm in a pretty good vacuum.


Title: Re: Changing the batteries on the ISS is a complex task.
Post by: pdf27 on January 27, 2017, 09:43:57 AM
Flywheel batteries have an interesting advantage for space applications - a space station like ISS needs flywheels of some sort to ensure that it is orientated towards the sun at all times without the need to expend propellant. Combine this with the requirement for relatively rapid charge/discharge times and rapid cycling (it will only ever be out of the sun for ~90 minutes at a time) and you get a very favourable environment for them. Of course, containment is a much bigger issue than normal so it isn't all a bed of roses...