mikkael · HackerTrans

10 năm trướcdiscuss

Sidenote: If your laptop is overheating it might be related to dust accumulating over the years inside the laptop in the area of the CPU, CPU fan, air inlets and outlets. You could probably get it cleaned in a local laptop repair shop or do it yourself (with the risk of damaging something).

mikkael

10 năm trướcdiscuss

According to my knowledge current car motor efficiency is about the same than power plants: gasoline car motor 40%, diesel car motor 43%, coal burning power plants 30-45%, gas burning power plants around 30% efficiency. All numbers are from Wikipedia.

But even if power plants would be more efficient (meaning producing more energy for the same fuel input) it still would make no difference from a CO2 emissions point of view after all fuel has been burnt...

mikkael

10 năm trướcdiscuss

Well, yes and no. My thinking is that for the climate it does not matter if you burn the fossile fuel in a car or in a power plant. At one point all the fossile fuel will have been burnt one way or the other and the same amount of CO2 will have been blown in the atmosphere. I am sure humanity will not stop consuming fossile fuels before they are exhausted unless it becomes economically unattractive to do so...

mikkael

10 năm trướcdiscuss

Regarding 2): Well, in Germany around 29% of the electrical power is currently from renewable energy sources (12% wind, 6% sun, 6% bio mass, 3% water, ...). Not (yet) enough for today and not enough for all future electric cars... https://www.bmwi.de/DE/Themen/Energie/Erneuerbare-Energien/e...

mikkael

10 năm trướcdiscuss

Thanks. And yes, currently we can still burn fossil fuels to satisfy our hunger for energy but I was projecting into the future. My thinking goes like this: Let's define the amount of current electrical power used for non-automotive purposes as E0(2016). Currently there is only a negligible amount of electrical cars, so the amount of energy used for automotive purposes Ea(2016) will be comparatively close to 0. I think in a (maybe not so) distant future time point t where electrical cars have mass adoption (just think of a scenario where all cars on the street are electrical) we will in addition to non-automotive energy E0(t) need electrical power for automotive purposes Ea(t) for every car on the street. And Ea(t) >> Ea(2016) will be huge. Where will such a huge amount of electrical power come from if not from nuclear power plants with all their problems? Other points to consider: 1. At some point in the future fossil fuels will run out - so no fossil fuel cars and no fossil fuel power plants any more. So E0(t) will also not come from fossil fuels anymore. As a sidenote on today's situation: I don't see a big difference for the environment whether a car burns the fossil fuel or a electrical car uses energy created by power plants that burn fossil fuels... 2. We have a growing earth population which will even increase the amount of energy consumed for non-automotive purposes in the future, so E0(t) > E0(2016). 3. Increased demand for electrical energy together with decreased amount of energy providers (fossil fuel power plants will be no more) will increase energy prices in the future.

mikkael

10 năm trướcdiscuss

Surely a nice car. But I wonder where all this electrical power for all those electrical cars in the future will come from? Probably from nuclear power plants with their still unresolved nuclear waste problematics - not even speaking about nuclear accidents. From this point of view I have some doubts that mass adoption of affordable electrical cars will be beneficial for the environment...

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