jonule wrote:who are you talking about fairground? I'm talking to you about a 12 volt caravan with a 220 converter! You do not know ? do you know the fairgrounds?
I just wanted to point out that those who use caravans all year round do not use 12 or 24 V. It should appeal to you ....
well no problem buddy if you want to teach me: tell me what is the section of the wire to power a low energy 12V bulb (15W for 75W) over 5 meters away? and in 24V?
A CAP happens in 1 year if I remember correctly so I will not teach you everything here but take into account the following things (thank you to the purists for understanding that the following lines are full of approximations but that it is enough for jonule):
Why 230 volts ??- In electricity, roughly, we calculate the power as follows: P = UxI (U the voltage and I the intensity). So at equal power, when you lower the voltage, you increase the intensity. This is the reason why we went from 110 to 220 then 230 V and that now, almost everywhere we have 240 volts. To use your example of the lamp: 15 W at 230 V this represents 0.06 amps. 15 w at 12 volts is 1.25 amps. It's huge for simple lighting. Even with a 75 W lamp at 230 volts, only 0.33 Amps are passed.
The ideal is therefore to have 15 W lamps at 230 volts. In the case of the lamp, being continuous or alternative does not change anything.
- For the same reasons, having high or very high voltage lines can limit the section of cables.
Why the alternative ??- Contrary to what you think, mainly for security reasons. Indeed, at equal voltage, we know that direct current is much more dangerous than the alternative. Of course on very low voltages (12 and 24 volts) we fear nothing in both cases but as soon as we go up in voltage, the danger increases for the DC. In addition, it is very easy to detect a fault on an AC circuit and to cut it. With the current installations which have differential circuit breakers in 30mA, we fear almost nothing any more.
- Being in alternative also allows to remove a cable during the transport of energy since it is the ground which is used as reference. It would take two for the continuous.
- We know how to make rotating machines with direct current but in general, at equal power they are much larger. Asynchronous motors (squirrel cage type for example) are very simple in design, resistant due to their design and ultimately require little maintenance. Quite the opposite of a DC.
Why does 12 volts solve nothing?As you will have understood (I hope in any case) it is preferable to use the 230 volts on all household appliances which require power (Ovens, washing machines, dishwasher, dryer ...) . Having a 12 volt source, even if it is then converted, filtered and modulated in 50 Hz, will therefore require a very very large intensity at the input with equally large cables. In addition, the devices that you will use to filter, rectify ... your current are expensive electronic equipment financially but also from an environmental point of view during their construction.
The ideal is therefore to reduce our need for electricity in 230 V.
so why are you pissing with your coke bottle?
I'm not talking about coke but vodka. I have it, I repeat, vodka does not keep in the back kitchen or in the fridge but in the freezer.
why are you interested in diameter? at the top of the mast, it doesn't matter, you can put a horizontal wind turbine if you don't want to put a mast, or even a hydraulic mill if you have water flowing through your home: the current.
Well if it's important because if I had a 10 hectare field behind my house, I don't care about having a 10m diameter wind turbine, I can hide it in a corner (windy of course) but like many French, I'm not so lucky. I live in a pavilion (it's already quite a lot in HLM), in a housing estate with a small garden and I imagine what it would be like if each house had its wind turbine on the roof from there to have 2-3 as you suggest
Let’s be clear, I’m not criticizing those who want to be independent and want to produce their own energy. If it can decrease their (and therefore our) dependence on nuclear power, gas or fuel oil / coal (for heating) why not but you often forget that many cannot do it. In how many HLM can we install your beautiful wood stove ?? in which city can we install individual wind turbines ??
What bothers me in collectives like "getting out of nuclear" is what I said in another post. They say "let's get out of nuclear power, it's possible, it's achievable, we need political will". Or but concretely what do they offer ?? What do they do on a daily basis ??
Wind power ?? As Rulian confirmed, it takes astronomical amounts and they can say what they want but it's not realistic. They take the example of Germany ??
look at the next post, their results are not so good, far from it and yet their electricity is much more expensive ....
I have never heard them denounce the public lighting, the lighting of empty offices at night, the computers of large companies and administrations that work 24/24 when we are 8 hours at the office, the eve of electronic devices. .. On this last point, it is UFC that choose or 60 million consumers who denounced it, not for environmental or nuclear reasons but just to defend the consumer who suddenly pays too much.
I have already said, I repeat by doing a little lobbying on these subjects they could close at least 5-6 units in France. On a little more than 50 it would already be not bad right? The funniest thing is that it would change almost nothing in our lives.
As I said before, now is the time to act, because in the next 10-20 years, many of our plants will be shut down and if we keep our consumption, they will be replaced by others. power stations.
for my EDF subscription, not for the moment, I reduce each consumption item to the minimum. but it is my goal one day I reassure you!
Finally if, I think to cancel EDF soon, I asked for ENERCOOP documentation, apparently since January 2008, we can go back if not happy! to have ...
Whether Poweo, GDF and others, do you think they take it where their electricity goes? Do you really think they produce it themselves? Do not be naive, it will come from the same EDF power stations !!!
