Where does all the heat go?
Where does all the heat go?
Author
Discussion

BigNige

Original Poster:

2,584 posts

245 months

Thursday 27th July 2006
quotequote all
I was musing upon such subject on the M23 tonight as I wennededed my way home, boxer engine thrumming happily and yet putting out a lot of heat.

I put my hand down behind the oil cooler (if you a have a GS you'll know what I mean) and there was a lot of heat coming from there too.

Now then, the Uk has what, 30million cars? (hell of a lot anyway) and they all put out loads of heat, all year round.

But that heat has to go somewhere into something...I'm wondering if exhaust emissions aren't something of a red herring with regard to global warming....I'm wondering if engine heat isn't actually a major factor?

Whadja reckon?




This was brought to you by BN laboratories - where rats die happy.

phrich

549 posts

244 months

Friday 28th July 2006
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Good question Nige, I have no idea but I know every car on the planet combined is only going to put out a tiny % of heat compared to what we receive from the sun.

BigNige

Original Poster:

2,584 posts

245 months

Friday 28th July 2006
quotequote all
Hmmm, that's a fair point, I wouldn't mind seeing the facts & figures though...and don't forget the planet's atmosphere will trap the vehicle heat (and home heat & industrial heat & people and animal heat etc)and simply add to the issue.

ringram

14,701 posts

269 months

Friday 28th July 2006
quotequote all
Interesting discussion here on the topic

www.newscientist.com/article.ns?id=dn7321

phrich

549 posts

244 months

Friday 28th July 2006
quotequote all
ringram said:
Interesting discussion here on the topic

www.newscientist.com/article.ns?id=dn7321


Interesting article but I have always struggled with the rising sea level idea because the ice use up more area when ice than when they become water so the net effect is only caused by the ice that is out of the water.

Try it yourself with a glass of water, it wont overflow when it melts.

So, to try and bring it back to topic, you should drink cold drinks whilst riding your BM

featherfoot

204 posts

247 months

Friday 28th July 2006
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Glad someone has posted a topic like this, because have always wondered about the where abouts, with regards to all the hot air my wife produces (talks-to clarify(not exclusive mind)). It starts by going in one of my ears and straight out the other - but what happens then?????
Will keep an eye on this tread for conclusions!

308mate

13,758 posts

243 months

Friday 28th July 2006
quotequote all
Heat doesnt stay as heat. Its only hot while whatever it is, is still unstable on its molecular level. In air, once its left the engine block or radiator or brakes, there's nothing to keep it hot above the level of whatever the sun's radiation can heat it to that day, so the molecules become more stable, and it cools down to whatever the ambient air temp is.

Thats what I think. But Ive been wrong before...

PB - producing a load of hot air since 1978

ringram

14,701 posts

269 months

Friday 28th July 2006
quotequote all
My understanding is the relatively intense heat radiated from the engine is conducted basically to the atmosphere. Its then radiated out into space or as the article above states, keep inside the atmosphere due to greenhouse gasses and contaminants.

PS: You guys should try Firefox 2 Beta, it does spell checking on forum posts as you type!

featherfoot

204 posts

247 months

Friday 28th July 2006
quotequote all
Firefox beta helps with Smelling Pisstakes does it???
............
........
.....
I'll get me coat!

Edited by featherfoot on Friday 28th July 14:19

caspy

1,791 posts

257 months

Friday 28th July 2006
quotequote all
featherfoot said:
Firefox beta helps with Smelling Pisstakes does it???
............
........
.....
I'll get me coat!

Edited by featherfoot on Friday 28th July 14:19


hsv_rulz

957 posts

243 months

Friday 28th July 2006
quotequote all
caspy said:
featherfoot said:
Firefox beta helps with Smelling Pisstakes does it???
............
........
.....
I'll get me coat!

Edited by featherfoot on Friday 28th July 14:19




hsv_rulz

957 posts

243 months

Friday 28th July 2006
quotequote all
phrich said:
ringram said:
Interesting discussion here on the topic

www.newscientist.com/article.ns?id=dn7321


Interesting article but I have always struggled with the rising sea level idea because the ice use up more area when ice than when they become water so the net effect is only caused by the ice that is out of the water.

Try it yourself with a glass of water, it wont overflow when it melts.

So, to try and bring it back to topic, you should drink cold drinks whilst riding your BM


On the subject of sea level rise - most of the ice on the planet is not 'floating' in the sea already, it is above sea level in (mostly) Antartica and Greenland. So, when this melts seas rise - and theres shirtloads in Antartica, km's thick

Dan_S V8

578 posts

240 months

Friday 28th July 2006
quotequote all
lol!

I think the amount of energy given out is miniscule when compared to the power of the sun. The amount of energy required to raise the earths average temperature just 0.1 of a degree is astronomical and I highly doubt cars are contributing in a noticeable way.