You realize it’s rough maintaining up with all the new clean and green technologies for producing renewable energy. Tell me about it. There such a large amount of top-notch improvements with a nice expertise. Wave and tidal, hen proof wind power, paint that gathers solar vigor, what will we believe of next? And a few of these aren’t so new. Take wind power, it around for hundreds of years. And some type of the has been around due to the fact that late 1800s.
In California, we presently obtain round 15% of our power from this supply each yr. Unless there may be a drought. Renewables count on the fact there will at all times be water, wind, and waves to accumulate vigor. Or sunshine. Take sunlight power. The sun powers the Earth’s process and greater than meeting our power desires. And there’re so many approaches to harness vigor from the solar. Big-scale concentrated sun vigor makes use of mirrors to direct colossal quantity of daylight to a smaller subject. Electrical power is generated when the light is converted into warmth, which drives a turbine related to a generator. Photovoltaics, the sunlight power that is most familiar, will also be small or significant scale.
Take San Francisco’s sundown Reservoir right here. The sundown Reservoir sun array generates about 5 megawatts of renewable energy for San Francisco. That’s the equivalent to about 500 homes a is that it powers. Photovoltaic cells absolutely take in the power of the sun. This power hits the solar cells, enjoyable electrons in a semiconductor. These electrons can also be captured and changed into clean electrical power. That is so cool, I did not ever know what was once occurring right here. Why are not sun cells on every roof? Exceptionally, if it is excellent for the atmosphere? Well, I heard that sunlight vigor may also be high-priced to install. How can we furnish this source to every home? Grid possible choices is a nonprofit group that has a mission of bringing renewable energy technologies to under served populations. For the final 10 years now we have achieved a total of greater than 6,300 installations throughout the country. So the 6,300 techniques that we now have set up will retailer the families that we have now hooked up them for greater than $one hundred sixty-five million, over the path of their lifetime. It will additionally offset greenhouse gasoline emissions, to the identical or almost to half 1,000,000 plenty. And that’s also the equivalent of taking ninety-one,000 automobiles off the road or planting eleven million timber. I am in.
Sunlight can shop the sector! I do not imply to literally rain on your parade, however solar is not able to continuously be our vigor source. What happens if it’s night time or if it’s cloudy? There are ways of extending solar’s attain beyond sunny days, but do not take my word for it, let’s hear from a trained. You can retailer sun visor either as electrical power or as warmness. Essentially the most apparent location you suppose of storing that electrical power is in a battery, but that is still beautiful high-priced.
There are definitely less highly-priced approaches to store sun electrical power. One is known as pumped hydroelectric storage, where you’ve two reservoirs– one higher reservoir, one scale back reservoir, and when you produce electrical power most of the time, when you are not looking for it for something else, then you should utilize that electrical power to pump the water as much as a hill to the second reservoir, after which, when you need the electrical energy, that you would be able to permit the water within the upper reservoir to drain down, run through a turbine to generate electrical energy.
So that is an approach of storage that is much less luxurious and truly beautiful long-established during the world at present. It seems like we will want many sources for our power at some point. Talking of other sources– Wait, where the heck are you? I’m at the Geysers geothermal vigor plant. Geothermal is a power approach from way deep in the earth. (John Avery) The Geysers is the biggest geothermal power plant in the world. We produce roughly 725 megawatts. Now we have roughly 350 steam wells that gather up the steam from beneath the ground within the geothermal reservoir, after which those wells feed pipelines and ultimately accumulate to our foremost lines, for example, this pipeline right here which works into our turbine constructing there and enters the steam turbine generator and that turbine is coupled to the generator which is rotating at 3,600 RPM, or 60 hertz, supplying the electricity to you.
Wow, there are numerous renewable choices. Yeah, we did not even let you know guys about this dance floor that generates the electricity with the aid of, … Well, dancing. However keep in mind, furthermore to all these new applied sciences, we have got to devour less vigor and use it more effectually. In order that there’s enough to go around. (music) So if we cut back our vigor use, does that mean we will stop dancing?