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How Windmills as Wide as Jumbo Jets Are Making Clean Energy Mainstream

nytimes.com

121–130 of 285 posts

Re: How Windmills as Wide as Jumbo Jets Are Making Clean Energy Mainstream

#121

Earlier quoted context omitted.

What I've meant was mining on the wind mills themselves. So there would be no need of passing through the grid.

I heard that crypto mining hardware has to have decent-ish (80-90%) uptime to be profitable. That would make it infeasible to have it on standby waiting for excess energy on the grid.

Isn't the number 80-90% based on electricity price?

Re: How Windmills as Wide as Jumbo Jets Are Making Clean Energy Mainstream

#122

As an aside, one of them burned last year: http://www.powerengineeringint.com/articles/2017/08/new-vest... By the way, you can walk right up to them. They are very impressive up close.

That's a 9.5MW unit that burned up. I don't like Vestas, they still use a gearbox which is a huge amount of extra complexity.

Re: How Windmills as Wide as Jumbo Jets Are Making Clean Energy Mainstream

#124
post #74
post #15

The interesting question is what effect clean energy has to the usage of hydrocarbons. Will it bring reduce global demand or just reduce the price of energy. The good news is: CO2 emission intensity is going down globally and emissions per capita in US, China and EU28 are going down. The bad news are: Emissions per capita are still going up globally, and hydrocarbon usage and CO2 emissions are breaking records year a…

> it just moves them from the developed world to the developing world This is a really good point, clean energy seems to be a luxury at the moment. No one can blame poorer countries, they aren't all in a position to invest in renewables, for many of them it would be crippling, the argument that renewables is sometimes cheaper only works long term, and long term takes significan't up front investment, burning coal etc…

Most of the developing world doesn't have a grid today. Building microgrids powered by small clean energy resources is much cheaper than building a grid. Now this is only true at modest per-capita electricity consumption amounts, but that matches the wealth available in a lot of places.

On a very small scale, that's why you see solar-powered flashlights being so popular in rural areas of the developing world. And my favorite charity (kickstart.org) is currently designing a solar-powered water pump, as a step up from their current human-powered water pumps.

Re: How Windmills as Wide as Jumbo Jets Are Making Clean Energy Mainstream

#125

Problem is that these are political markets not market markets. Denmark spent a lot of money on getting their windmill industry up and running and windmills still aren't solving the base problem as they aren't reliable for all sorts of weather. Furthermore, windmilss don't really scale well, Nuclear on the other hand which is both safer and more scalable and greener would change that but right now only the Chinese se…

Can you please define doesn’t scale well? I work in this industry, wind farms have gone from For reference the new nuclear in the UK (Hinkley 3.2gw) is receiving a £93/mwh subsidy, offshore wind uk project Hornsea two (1.8gw)is going to get £72mwh, and the Netherlands projects are receiving a zero subsidy for ~750mw projects.

It is not going to solve our energy crisis but there are virtually no negatives to building them now, if you have a coastline you can have zero subsidy clean energy in the next 5-10yrs.

Re: How Windmills as Wide as Jumbo Jets Are Making Clean Energy Mainstream

#126
post #119

Earlier quoted context omitted.

Also, I recall reading that if you run undersea cables with AC, the sea water sucks out energy from them.

Can’t tell if trolling or not. The cables have water barriers so the conductors + insulation remain quite dry.

I believe the parent meant that the alternating current creates an electric field which is then absorbed by the water, leading to energy loss. This happens to some extent to all AC transmission, but I don't know enough to say if seawater+AC is a particularly bad combination. It would make sense though, because it's more conductive.

EDIT: brandmeyer's comment explains it well: https://news.ycombinator.com/item?id=16903431

Re: How Windmills as Wide as Jumbo Jets Are Making Clean Energy Mainstream

#127
post #106
post #15

The interesting question is what effect clean energy has to the usage of hydrocarbons. Will it bring reduce global demand or just reduce the price of energy. The good news is: CO2 emission intensity is going down globally and emissions per capita in US, China and EU28 are going down. The bad news are: Emissions per capita are still going up globally, and hydrocarbon usage and CO2 emissions are breaking records year a…

As a new farmer, this is good news. My target range for CO2 is 1200ppm. This means our future will be greener! https://www.youtube.com/watch?v=XkDgYLxp8Sg

Wait, you think that we should triple the CO2 levels? Humanity's well-being on this earth is not exactly bottle-necked by our current ability to produce plant matter, and at 1200ppm I'm pretty sure we'll discover lots of new and exciting (not-good exciting) ways that our survival is bottle-necked.

Re: How Windmills as Wide as Jumbo Jets Are Making Clean Energy Mainstream

#128
post #106
post #15

The interesting question is what effect clean energy has to the usage of hydrocarbons. Will it bring reduce global demand or just reduce the price of energy. The good news is: CO2 emission intensity is going down globally and emissions per capita in US, China and EU28 are going down. The bad news are: Emissions per capita are still going up globally, and hydrocarbon usage and CO2 emissions are breaking records year a…

As a new farmer, this is good news. My target range for CO2 is 1200ppm. This means our future will be greener! https://www.youtube.com/watch?v=XkDgYLxp8Sg

Plants are often limited by resources other than CO2. Also, high temperatures reduce crop yields in most places.

Re: How Windmills as Wide as Jumbo Jets Are Making Clean Energy Mainstream

#129
post #2

As the production costs with windpower decrease due to the technological progress, the question of grid storage and grid interconnection becomes more pressing. E.g. in Germany, they frequently have days of negative energy prices, where producers need to pay to feed energy into the greed because of overproduction of energy on windy/sunny days [0](in German). Without storage and grid interconnection, there is only so m…

I think the dream is just to make wind power so ludicrously plentiful that the fact that it's kind of mediocre during daytime is overwhelmed by sheer quantity of generators.

Re: How Windmills as Wide as Jumbo Jets Are Making Clean Energy Mainstream

#130
post #31

The future of mankind lies with nuclear power. I'm distressed by it not receiving as much attention as windmills.

The cost of nuclear power seems to go up while every other zero-emissions energy source goes down. Even ignoring the fears about accidents and waste, it seems like nuclear may end up a transitional source.
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