ezzaf

8 ms·

31.
by ezzaf 5y ago
ERCOT has a price cap similar to the NEM, but as far as I am aware no equivalent to the Cumulative Price Threshold which limits how long the price can sit at market cap for. In the NEM roughly speaking after 7.5 hours the price gets dropped
32.
by ezzaf 5y ago
A few interesting points about the NEM that help explain why it's avoided a simple situation. 1: There are multiple price caps that set a maximum price on energy. 2: There's a commonly traded instrument that effectively acts as an
33.
by ezzaf 5y ago
That's a larger model, this is the earlier Saildrone Explorer mentioned in that video. The vessel they are launching is 72 feet long, this one is 23 feet. So not a model boat, but not large either.
34.
by ezzaf 5y ago
Are they losing money grounding them? They're probably operating fewer flights that pre covid so they could have more planes then needed and be using this opportunity to 'ground' planes with minor issues as a negotiation tact
35.
by ezzaf 5y ago
I'm the case of this specific battery, it's been being built specifically because there's generally a surplus of cheap renewables in Victoria when the sun is shining. This energy can be sold back into the market during the ev
36.
by ezzaf 5y ago
Utility scale generation of renewables in Australia creates tradable certificates. These are required by law to be purchased by energy retailers to meet the Renewable Energy Target. If that certificate trades at $50, I can sell my power for
37.
by ezzaf 5y ago
Visitation numbers from the article: "Despite the challenges and restrictions of the COVID pandemic, 129,218 people traveled to Crater of Diamonds in 2020 for what was a record-breaking year, with more than 80 carats of diamonds uneart
38.
by ezzaf 5y ago
50MW is a small scale solar generator these days. Bhadla Solar Park is 2.2GW, and there are plans being tossed around to go even larger. For example 10GW in northern Australia (Sun Cable).
39.
by ezzaf 5y ago
Hugely. A few of the main factors that will determine your payoff time: - Subsidies. - Cost of labour. How much do you need to pay to install the panels? - Your energy usage patterns. If you use a lot of energy when the sun is shining, your
40.
by ezzaf 6y ago
You're going to share the jackpot with dozens of other winners, so it wouldn't be immediately obvious which of the winners rigged it. While if you pick a random number sequence and are the only winner, you'll be the prime sus
41.
by ezzaf 6y ago
This already exist in some places (for example Amber and Powerclub in Australia). The issue is it's more effort than most people are happy to exert. They are used to flicking a switch having the appliance on whenever they want it. To c
42.
by ezzaf 6y ago
> So it's more correct to say that local generation is 100% renewable, not total energy consumption. In actual fact even local generation is not 100% renewable, they have a small quantity of gas generation too. For example Tamar val
43.
by ezzaf 6y ago
You use a combination of local measurements (over a year) and historic weather data (over decades) combined with the specifications of your generator to estimate output. That model gives you an expected generation in an average year, amongs
44.
by ezzaf 6y ago
I actually think this is quite reasonable. One issue with the "wait until they are a larger share of the market" argument is trying to add a tax gets harder the more people are used to not paying it. The earlier you introduce it t
45.
by ezzaf 6y ago
Is it really comparable with the bay area? A quick scan suggests that the most expensive city in NZ (Auckland) sits at around NZ$1 million. Compare that to US$1.3 million for San Francisco. The rest of NZ is substantially cheaper, the secon
46.
by ezzaf 6y ago
Solar panels only outperform a human when the sun is shining. From the article: "But what if skies remained gray for many days in a row? Rather than trying to purchase enough battery storage to cover all reasonable eventualities, I dec
47.
by ezzaf 6y ago
Why fix sunrise and not sunset? And how do you handle extreme latitudes, where the sun might stay up for days without setting, or set half an hour after it rises?
48.
by ezzaf 6y ago
It's showing live data. Being nighttime, there is currently no solar generation. If you click on the country and look at the little last 24 hour visualisation you can see solar production peaking at 23% yesterday in Germany. https:&#x
49.
by ezzaf 6y ago
Sorry I wasn't very specific. It appears to be counting solar generation as coal generation, so the amount of co2 emissions is vastly inflated.
50.
by ezzaf 6y ago
The site is missing a large amount of Australian renewable generation. Compare it to http://nemlog.com.au/gen/co2e/ for example.
51.
by ezzaf 6y ago
The problem is in fact with the source file, it lists just two solar power stations but there are at least 30 in Queensland.
52.
by ezzaf 6y ago
The map appears to be counting some renewable generation in Queensland as CO2 emitting. There's actually quite high solar penetration. That said, Australian is a large contributor to pollution. The majority of electricity is still prod
53.
by ezzaf 6y ago
Flatten the curve means new infections, not total cases. Its primary purpose is to slow the rate of spread to avoid health services becoming overwhelmed. See the graph at https://flattenthecurve.co.uk/ for an example. You c
54.
by ezzaf 6y ago
The comment I was replying to stated that "Renewables _always_ require a fossil backup". This is clearly untrue, as the multiple examples of grids that do not have or need fossil backup shows. Certainly the examples I have given a
55.
by ezzaf 6y ago
That's simply untrue. Iceland for example is already 100% renewable. Other grids with large installed hydro generation (eg New Zealand) could move to solely renewable with the installation of more intermittent generation and transmissi
56.
by ezzaf 6y ago
From another quality publication by the lead author: "In this research, we show that 5G millimeter waves could be absorbed by dermatologic cells acting like antennas, transferred to other cells and play the main role in producing Coron
57.
by ezzaf 6y ago
Wouldn't it be better to compare fuel per passenger per hour rather than per km? It's entertainment not transport so the KMs travelled doesn't seem so relevant.
58.
by ezzaf 6y ago
Sure you could, but that's not how the dealers are (usually) operating. The option is much cheaper than the stock, so when selling a call option you're unlikely to have the entire position covered. From further down the article: &
59.
by ezzaf 6y ago
It's cheaper to just replace the heat source than attempt to fix it starts malfunctioning.
60.
by ezzaf 6y ago
You can provide frequency control in one part to keep another part stable. For example if you have a part of your grid with a high level of renewables (for example, South Australia), system stability can be provided by large intertia genera

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