snowwindwaves

5 ms·

1.
by snowwindwaves 5y ago
Large power transformers have efficiencies in the 98-99.75% range. I don't doubt switch mode could be smaller and cheaper up to some size, but I am struggling to see transformers larger than about 5 mva being replaced with power electr
2.
by snowwindwaves 5y ago
Are you saying large Transformers 1 mva, 10 mva, 100 mva, 500 mva are obsolete and should be replaced by switched mode power supplies? What mva is the threshold?
3.
by snowwindwaves 5y ago
like you I hope I'm as present in my senior years! Female friends have entertaining stories about encounters with him from 17 years ago when he was 77!
4.
by snowwindwaves 5y ago
what else have envy and greed driven? What would the world look like without those inate human emotions? It might be a simpler place but potentially the worst of history could have been avoided.
5.
by snowwindwaves 5y ago
Wannabe's is pretty harsh for a group of people that started first and achieved their goals second. Wannabe's never do the thing. They don't seriously try to do it. I have no reason to defend bezos but people made a serious e
6.
by snowwindwaves 5y ago
You'll be a manager one day
7.
by snowwindwaves 5y ago
Are there cities with land that isn't expensive?
8.
by snowwindwaves 5y ago
In desireable locations the land cost is often more than the construction cost, so splitting that land cost across multiple dwellings makes them more affordable. Sure the cost per sq ft is higher when you are putting in three dwellings unde
9.
by snowwindwaves 5y ago
I'm looking to sell my f150 in to these high used car prices and get an electric pickup for hauling my snowmobile. Self driving doesn't interest me at all. Cyber truck delivery is mid 2022. Hopefully it is cheaper than the long ra
10.
by snowwindwaves 5y ago
Just to be clear vxworks is not bsd based that I could tell from Wikipedia. I work with Schneider electric plcs and sometimes vxworks errors bubble up.
11.
by snowwindwaves 5y ago
I didn't realize that hydrogen is/will be commonly transported as NH3 ammonia before its end-use. I'm starting to see lots of articles about Ammonia as the transportable energy dense fuel of the future that could soon be flo
12.
Hydrogen: The middle east's next black gold(thenationalnews.com)
2 points by snowwindwaves 5y ago|2 comments
13.
by snowwindwaves 5y ago
It becomes an easy decision to get an electric f150 when gas costs $8 a gallon because of carbon taxes and a full charge is only a couple bucks
14.
by snowwindwaves 5y ago
Both you and and animats are describing the same thing, brushless synchronous machine, which exists for long time.
15.
by snowwindwaves 6y ago
Thanks for the great posts. Have you seen any numbers for the life expectancy of grid connected batteries? I heard A solar project in Hawaii expects to replace the batteries every 5 years with daily cycles. So for California it would be $11
16.
by snowwindwaves 6y ago
Nuclear + renewables = 0 carbon and a consistent reliable base load ... sounds ideal?
17.
by snowwindwaves 6y ago
People are attacking texas' less interconnected system for being "independent" and others are pointing out more interconnections from places with no power to spare would not have helped.
18.
by snowwindwaves 6y ago
Underground costs about 10x as much as overhead.
19.
by snowwindwaves 6y ago
The intertie from BC to Washington is 3150 MW from north to south.
20.
by snowwindwaves 6y ago
Put the food outside?
21.
by snowwindwaves 6y ago
The paper suggests solar thermal and wind plus gas peakers. So the overbuilt point from the parent stands.
22.
by snowwindwaves 6y ago
So bringing up battery storage on an article about a blackout caused by a multi day storm might lead some people to believe that batteries would make a difference in this situation, when they wouldn't, regardless of the GW.
23.
by snowwindwaves 6y ago
Electrical engineers wouldn't build a power line to Texas with a capacity of 5000 MW and then put intertie hardware such as phase shifters or ac-dc-ac converter with capacity of 1000 MW on the end of it. So it is likely that the transm
24.
by snowwindwaves 6y ago
Not for batteries since a battery that can deliver 17 GW for an hour is much smaller than one that can deliver 17 GW for a week. Usually grid connections are measured in power since you could use it at 100% indefinitely - not so with a batt
25.
by snowwindwaves 6y ago
Or somebody cheaper can generate since they didn't bother building their plants to withstand low temperatures so the more expensive plants to run go out of business or lose that expensive to maintain ability and then here we are
26.
by snowwindwaves 6y ago
it isn't that big a deal to run a fridge and some led lights on solar pAnels. As you identified heating and cooling are the big energy users.
27.
by snowwindwaves 6y ago
Plus they are not really screwed, they lost 5 days revenue from not being able to pump/generate, surely at elevated prices - but these businesses will not feel this event in a negative way on their annual report
28.
by snowwindwaves 6y ago
70 GWh of battery storage would have kept the lights on for an extra 2 hours during this event - assuming the batteries themselves aren't affected by temperature. While battery storage might be nice to increase the capacity factor of a
29.
by snowwindwaves 6y ago
The parent said there is not enough transmission capacity not generation capacity. Generation needs to be near loads. If not then transmission lines are required to bring current from generators to loads. Transmission lines have fixed capac
30.
by snowwindwaves 6y ago
For remote interrogation of meters?

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