Editing Talk:1924: Solar Panels
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:You are right that charging batteries from power plants running on fossile fuel doesn't really bring any ecological advantages ... assuming the engine operates close to optimal parameters. Most cars doesn't operate near optimal parameters inside city, but do on highways, hence hybrid. Also, it is much more ecological to have batteries charged by nuclear power plants. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 04:15, 5 December 2017 (UTC) | :You are right that charging batteries from power plants running on fossile fuel doesn't really bring any ecological advantages ... assuming the engine operates close to optimal parameters. Most cars doesn't operate near optimal parameters inside city, but do on highways, hence hybrid. Also, it is much more ecological to have batteries charged by nuclear power plants. -- [[User:Hkmaly|Hkmaly]] ([[User talk:Hkmaly|talk]]) 04:15, 5 December 2017 (UTC) | ||
::Ja, Germany here. Our whole politics from left to right has this obsessive-compulsive nuclear-power-blows-up-and-poisons-everyone problem, so we're switching them off. --[[Special:Contributions/162.158.89.133|162.158.89.133]] 07:49, 6 December 2017 (UTC) | ::Ja, Germany here. Our whole politics from left to right has this obsessive-compulsive nuclear-power-blows-up-and-poisons-everyone problem, so we're switching them off. --[[Special:Contributions/162.158.89.133|162.158.89.133]] 07:49, 6 December 2017 (UTC) | ||
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: I always thought of the main advantage of electrical battery powered cars (instead of petrol or Diesel powered ones) was not so much the immediate ecological improvement, but rather that (once they are the norm) you don't need to convince EVERY SINGLE CAR USER to get rid of their old car and get a new one (Like you have to do now, when you invent engines which use less fuel or something). Instead, when you change the overall energy production of a country (hopefully to something more sustainable and envronmentally friendly), the cars will just passively follow. [[Special:Contributions/162.158.89.37|162.158.89.37]] 14:46, 5 December 2017 (UTC) | : I always thought of the main advantage of electrical battery powered cars (instead of petrol or Diesel powered ones) was not so much the immediate ecological improvement, but rather that (once they are the norm) you don't need to convince EVERY SINGLE CAR USER to get rid of their old car and get a new one (Like you have to do now, when you invent engines which use less fuel or something). Instead, when you change the overall energy production of a country (hopefully to something more sustainable and envronmentally friendly), the cars will just passively follow. [[Special:Contributions/162.158.89.37|162.158.89.37]] 14:46, 5 December 2017 (UTC) | ||
:: I think the main motivation for moving to electric vehicles is that it largely moves the pollution away from where people are. (From the energy production, anyway - particulate pollution from brakes, tyres, etc. is a whole other matter...)[[Special:Contributions/162.158.34.4|162.158.34.4]] 09:10, 6 December 2017 (UTC) | :: I think the main motivation for moving to electric vehicles is that it largely moves the pollution away from where people are. (From the energy production, anyway - particulate pollution from brakes, tyres, etc. is a whole other matter...)[[Special:Contributions/162.158.34.4|162.158.34.4]] 09:10, 6 December 2017 (UTC) | ||
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:Not particularly as he used similar design in [[1688: Map Age Guide]]. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 09:01, 6 December 2017 (UTC) | :Not particularly as he used similar design in [[1688: Map Age Guide]]. --[[User:Kynde|Kynde]] ([[User talk:Kynde|talk]]) 09:01, 6 December 2017 (UTC) | ||
− | The reason that you don't want to put solar panels on something that is hot is not because hot things use more power. It's because the efficiency of solar panels decreases as a function of temperature: See here for example http://news.energysage.com/solar-panel-temperature-overheating/. This is why solar panels on a road are not a great idea (among other reasons). [[Special:Contributions/108.162.219.76|108.162.219.76]] 01:23, 6 December 2017 (UTC) | + | The reason that you don't want to put solar panels on something that is hot is not because hot things use more power. It's because the efficiency of solar panels decreases as a function of temperature: See here for example http://news.energysage.com/solar-panel-temperature-overheating/ . This is why solar panels on a road are not a great idea (among other reasons). [[Special:Contributions/108.162.219.76|108.162.219.76]] 01:23, 6 December 2017 (UTC) |
Maybe I'm just a bit slow here, but why are jets, cars and deer considered hot to the touch when running? Sure, jets and cars do have hot parts when running - but so have many modern sail boats (at least motorized ones). And what about deer? The only deer being hot is the one in my oven - and there's no sun. [[User:Elektrizikekswerk|Elektrizikekswerk]] ([[User talk:Elektrizikekswerk|talk]]) 14:31, 6 December 2017 (UTC) | Maybe I'm just a bit slow here, but why are jets, cars and deer considered hot to the touch when running? Sure, jets and cars do have hot parts when running - but so have many modern sail boats (at least motorized ones). And what about deer? The only deer being hot is the one in my oven - and there's no sun. [[User:Elektrizikekswerk|Elektrizikekswerk]] ([[User talk:Elektrizikekswerk|talk]]) 14:31, 6 December 2017 (UTC) | ||
:well sailboats have only a small part (the motor) that is becoming really hot, since the body is watercooled. While deer are not getting that hot, a quick google search told me that their regular body temperature is 38.5-39.5°C. Also they do not regulate their temperature by sweating through skinpores as humans, but by sweating in their mouth, and regulating their temperatures through their ears. This means, in my understanding, that when they are running, the body cannot cool down as good as a human one, so i guess the can get up to 40-42°C during that period. | :well sailboats have only a small part (the motor) that is becoming really hot, since the body is watercooled. While deer are not getting that hot, a quick google search told me that their regular body temperature is 38.5-39.5°C. Also they do not regulate their temperature by sweating through skinpores as humans, but by sweating in their mouth, and regulating their temperatures through their ears. This means, in my understanding, that when they are running, the body cannot cool down as good as a human one, so i guess the can get up to 40-42°C during that period. | ||
:The second thing to consider is, that hot is always relative. In this context it should mean "hot compared to the cooling water of a solar panel", as solar panels generate power by heating up water in a circuit (on a deer it should be a small cirquit to not put to much ballast on the deer). Heating it up can only generate power, when it is also cooled down. For this it needs a colder reference. When the deer itself is getting ~40°C, thats too hot to have cooling capacity. [[User:Lupo|Lupo]] ([[User talk:Lupo|talk]]) | :The second thing to consider is, that hot is always relative. In this context it should mean "hot compared to the cooling water of a solar panel", as solar panels generate power by heating up water in a circuit (on a deer it should be a small cirquit to not put to much ballast on the deer). Heating it up can only generate power, when it is also cooled down. For this it needs a colder reference. When the deer itself is getting ~40°C, thats too hot to have cooling capacity. [[User:Lupo|Lupo]] ([[User talk:Lupo|talk]]) | ||
− | ::While I see that PV get less effective if heated up and as such cooling makes sense, this was the first time I heard of that. So thank you for that (really!). In the wiki https://en.wikipedia.org/wiki/Solar_panel cooling isn't even mentioned at all. However, this still does not convince me. https://en.wikipedia.org/wiki/Solar_car https://en.wikipedia.org/wiki/Solar_Impulse Granted, these are all protoptypes/experiments (and the plane is definitely no jet) and will most likely not come to serial production, but nevertheless... | + | ::While I see that PV get less effective if heated up and as such cooling makes sense, this was the first time I heard of that. So thank you for that (really!). In the wiki https://en.wikipedia.org/wiki/Solar_panel cooling isn't even mentioned at all. However, this still does not convince me. https://en.wikipedia.org/wiki/Solar_car https://en.wikipedia.org/wiki/Solar_Impulse Granted, these are all protoptypes/experiments (and the plane is definitely no jet) and will most likely not come to serial production, but nevertheless... |
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