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Old May 24th, 2012, 05:26 PM   #13881
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you don't see a bycicle in Paris when it rains

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Old May 24th, 2012, 05:28 PM   #13882
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Germans go by bicycle even with snow falling and -7°C.
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Old May 24th, 2012, 05:30 PM   #13883
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http://www.youtube.com/user/markenlei/videos?query=snow
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Old May 24th, 2012, 05:32 PM   #13884
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Utter madness
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Old May 24th, 2012, 05:33 PM   #13885
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It is useless (and a bit hypocritical) to buy an electric car to prevent pollution, while 80% of that electricity is still produced by fossil fuels. It is just moving the problem from one spot to another.
As far as I know, the efficiency of electrical engines is far higher than internal combustion ones. Something like 92% vs. 34%.

Moreover, there is an interesting possibility: fitting a car not with one, but with 4 engines, one on each wheel, eliminating the complex (and ultra heavy) system of clutch, gearbox, transmission, differential axis...
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Old May 24th, 2012, 05:40 PM   #13886
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As far as I know, the efficiency of electrical engines is far higher than internal combustion ones. Something like 92% vs. 34%.

Moreover, there is an interesting possibility: fitting a car not with one, but with 4 engines, one on each wheel, eliminating the complex (and ultra heavy) system of clutch, gearbox, transmission, differential axis...
That may be true, but I was talking about the generation of electricity in plants, which is still largely produced by fossil fuels. Even the so called "clean energy" isn't clean at all: hydroelectric power is generated by destroying entire valleys and ecosystems; solar energy depends on excavating rare earths and materials to be used in panels, ecc ecc.
Moreover, all these plants have a rather low efficiency in converting potential or thermal energy into electricity.
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Old May 24th, 2012, 05:52 PM   #13887
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I don't have the exact numbers, but I'm pretty much sure a large powerplant has inevitable scale efficiency compared to generating power from a local 1300mm3 engine...
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Old May 24th, 2012, 06:45 PM   #13888
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Originally Posted by g.spinoza View Post
That may be true, but I was talking about the generation of electricity in plants, which is still largely produced by fossil fuels. Even the so called "clean energy" isn't clean at all: hydroelectric power is generated by destroying entire valleys and ecosystems; solar energy depends on excavating rare earths and materials to be used in panels, ecc ecc.
Moreover, all these plants have a rather low efficiency in converting potential or thermal energy into electricity.
so that means that the technology should not be continued to be developed and fuel should be used until it finishes? sorry, but such comments deserve an insult.
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Old May 24th, 2012, 06:49 PM   #13889
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so that means that the technology should not be continued to be developed and fuel should be used until it finishes? sorry, but such comments deserve an insult.
I never said that, so please chill out and go insult someone else.
I just said that all that glitters ain't gold.
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Old May 24th, 2012, 06:54 PM   #13890
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But they are something to go on. And they must be followed. i think you don't have really a lot of knowledge, otherwise you would not talk such stuff. One wind fan can produce energy for several houses. A few wind fans can produce energy for a whole village, so it is not to underestimate, even photovoltaic energy produces some energy, which is not to be underestimated.
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Old May 24th, 2012, 07:05 PM   #13891
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But they are something to go on. And they must be followed. i think you don't have really a lot of knowledge, otherwise you would not talk such stuff. One wind fan can produce energy for several houses. A few wind fans can produce energy for a whole village, so it is not to underestimate, even photovoltaic energy produces some energy, which is not to be underestimated.
You don't know me and you don't know how much knowledge I have. On the contrary, you just keep saying sentences like "photovoltaic energy produces some energy" which means nothing and completely ignores the issues with photovoltaic that I (and others) stressed.

As someone said, clean energy is the future, but sadly, we're still in the present. Research on this subject is badly needed, and I'm completely in favour of it, but we still have much road in front of us.
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Old May 24th, 2012, 07:13 PM   #13892
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That is so standard You can see that everywhere in the Netherlands.
yeah, I even had drunken unknown people that I passed on the street jumping on my bike... .

But to be honest, it wasnt so easy to perform when I needed it.

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As someone said, clean energy is the future, but sadly, we're still in the present. Research on this subject is badly needed, and I'm completely in favour of it, but we still have much road in front of us.
There is nothing like a clean energy...

Ultimately, we just try to transform energy from one form into another, we transform it into the usable form for our purposes. Using it, we transform it into unusable form for our purposes. Since we want to use energy in a way when we decrease entropy of some system, inevitably entropy of another system increases. Theoretically we could find a ballance in that. If half of our needs were fullfiled by incrasing entropy and the other half by decreasing entropy. If there is no balance we will allways need some sort of "landfill".

The problem arises, because transforming energy into usable form costs energy... thus the balance can hardly be achieved.

And this is also interesting reading...

http://physics.ucsd.edu/do-the-math/...ets-physicist/

Last edited by Surel; May 24th, 2012 at 07:29 PM.
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Old May 24th, 2012, 08:56 PM   #13893
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In Italy nobody would ever think of using the bicycle during a rainfall or snowfall. Even when there is no rain or snow but it's too cold (less than 10°C for Mediterranean standards) many people avoid cycling. It feel strange that in other countries cycling in those extreme conditions seems the most normal thing in the earth.

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Reminds me of this (A30 Bad Oeynhausen, Germany)
Are they going to build a tunnel?
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Old May 24th, 2012, 09:00 PM   #13894
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No, they had problems with expropriation there.
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Old May 24th, 2012, 09:20 PM   #13895
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In Italy nobody would ever think of using the bicycle during a rainfall or snowfall. Even when there is no rain or snow but it's too cold (less than 10°C for Mediterranean standards) many people avoid cycling. It feel strange that in other countries cycling in those extreme conditions seems the most normal thing in the earth.
neither here. and two persons on 1 bike - sometimes here i find it rare to see 2 persons in one car
(i confess, i hate sharing a car while going to work in the morning - i hate the whole world early in the morning and those 10 minutes while commuting are mine and god's; i used to share my car with my neighbour who really kindly asked me for that, and i hated it )
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Old May 24th, 2012, 09:23 PM   #13896
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How is it going in Bad Oeynhausen anyway? Will it be finished by this summer or the next one?
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Old May 24th, 2012, 09:28 PM   #13897
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Don't count on it. Some sections are nearly finished, others must still commence. I'd say it will be completed in 2016.
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Old May 24th, 2012, 09:32 PM   #13898
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Dutch side bike saddle hop:



You know what. All this bicycle riding has caused another problem. Bicycle pollution. All those bikes strewn all around is making the city look tacky. There is just no good solution is there.
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Old May 24th, 2012, 09:34 PM   #13899
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How do many bikes make a city look tacky??
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Old May 24th, 2012, 09:38 PM   #13900
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How do many bikes make a city look tacky??
Good question. Even better than why did the chicken cross the road?
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