Search found 1579 matches

by billvon
Jan 19 2019 12:49pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

GDP is probably more closely correlated to useful energy CONSUMPTION now that efficiencies from electrification are starting to creep in. With the emphasis on "useful," yes. The main reason we have seen some energy uses per capita decline of late is due to that effect. When energy is cheap efficien...
by billvon
Jan 19 2019 11:13am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

sendler2112 wrote:
Jan 17 2019 3:17pm
Economy. energy, population, are correlated nearly 1:1:1.
Energy USED can be sorta correlated in that way. Energy EXPENDED cannot be.
by billvon
Jan 17 2019 5:53pm
Forum: Battery Technology
Topic: Why does my 12v charger output 24v?
Replies: 4
Views: 86

Re: Why does my 12v charger output 24v?

I have a black and decker 12v drill, and I wanted to use it’s charger for a custom 12v battery pack I built. I measured the voltage with my multimeter, and it shows and output of 24v (same as is labeled on the charger). Why is this? Is there some way this is safe for my battery? What chemistry is y...
by billvon
Jan 17 2019 5:45pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

sendler2112 wrote:
Jan 17 2019 5:37pm
And electrified heavy rail replacing diesel rail, cross country trucking and air freight.
Or electrified trucking using catenaries. That allows the US to continue their love affair with road-based transport and solves the last-mile problem at the same time.
by billvon
Jan 17 2019 11:23am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

I don't think this will be an issue as we can make endless amounts of stationary energy that can be transferred through the grid to manufacture on a global scale Given the problems countries have with blackouts, high power prices and grid stability - I don't think that's true. And much of it depend...
by billvon
Jan 16 2019 6:41pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

The day is still young, they can declare bankruptcy again. As a dozen solar companies have. That doesn't mean that the technology behind solar-PV is a failure - just that people made bad business decisions. As for Chinese... those guys operate under completely different parameters, I wouldn't try t...
by billvon
Jan 16 2019 6:39pm
Forum: Battery Technology
Topic: LFP mobile House bank - xSyP serial vs parallel design thoughts
Replies: 37
Views: 581

Re: LFP mobile House bank - xSyP serial vs parallel design thoughts

So, for both types, units connected serially, need to be actively, explicitly balanced, whether done manually or automated. Not really. For serial connections of lead acid you just have to charge them. You can equalize charge if you want, but usually that's not needed due to the self-balancing aspe...
by billvon
Jan 16 2019 5:10pm
Forum: Battery Technology
Topic: LFP mobile House bank - xSyP serial vs parallel design thoughts
Replies: 37
Views: 581

Re: LFP mobile House bank - xSyP serial vs parallel design thoughts

Even if now **larger** Voltage / SoC differences exist between the 2V cells, (as above, no charge source), no current will flow when paralleled? When cells are paralleled, current will flow until the voltages in each cell are identical. This will do a good job of balancing paralleled LiFePO4 batter...
by billvon
Jan 16 2019 4:17pm
Forum: Battery Technology
Topic: LFP mobile House bank - xSyP serial vs parallel design thoughts
Replies: 37
Views: 581

Re: LFP mobile House bank - xSyP serial vs parallel design thoughts

Two sets of battery cells #1. 6x lead cells vs #2. 4x LFP cells within each set, each cell resting at slightly different voltages / SoC, small enough any "self balancing flow" current rate issues are minor. Two separate intra-pack wiring configurations: A. the set connected in series, both sets at ...
by billvon
Jan 16 2019 2:51pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

cricketo wrote:
Jan 16 2019 2:15pm
We might be settling on Mars before that stuff happens :)
We are settling Mars within 3 years? Why was I not told?
Work on that is already ongoing.
Agreed. Vogtle 3 will be open by 2021, Vogtle 4 will be open a year after that. The Chinese AP1000's are already up and running.
by billvon
Jan 16 2019 1:29pm
Forum: General Discussion
Topic: Fiat Chrysler pays millions...
Replies: 17
Views: 249

Re: Fiat Chrysler pays millions...

If the emissions laws were more reasonable the clean deisel would be cheaper and I could get something like the deisel Mazda 6 wagon which seems to be available everywhere else but "coming soon" for about 6 years here. What is unreasonable about them? I'll go ahead and repeat that the current laws ...
by billvon
Jan 16 2019 1:23pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

cricketo wrote:
Jan 16 2019 1:17pm
Sure, but reactors aren't happening for non-technical reasons. I guess that's another major difference.
Well, except they are happening, just slowly. We should start working on things that are possible today and see where it gets us.
by billvon
Jan 16 2019 1:14pm
Forum: Battery Technology
Topic: LFP mobile House bank - xSyP serial vs parallel design thoughts
Replies: 37
Views: 581

Re: LFP mobile House bank - xSyP serial vs parallel design thoughts

So I assume you mean a series'd unit, say 6V, rather than separate 2V cells like Rolls Surrette, which could be put in parallel before serial. Yes, a large string in series, not parallel. Are you saying that works differently for lead than it does for LFP? Yes. LFP don't need to be fully charged to...
by billvon
Jan 16 2019 1:09pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

How about we stop fantasizing, and start working on things that are possible today and see where it gets us first ? Exactly, that's been my argument. In engineering we have to experiment and try out things, push the boundaries. There have been people like you in the past, who had well-supported pos...
by billvon
Jan 16 2019 11:18am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

I agree. Cars kill more people in US than guns. We're trying to ban guns, not cars though :) Well, I'd say we're trying to regulate both. Cars have seen more success with regulation than guns. We are more likely to accept elevated risks when it is truly the only choice and/or a great necessity. I t...
by billvon
Jan 16 2019 12:53am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

You can certainly make a reactor to any level of safety. No, you can't. Of course you can. You can design a reactor to any level of safety you like - if you are willing to pay for it. MSR's dump their entire core into a big concrete pit if temperatures exceed safe levels, for example - with no inpu...
by billvon
Jan 16 2019 12:40am
Forum: Battery Technology
Topic: LFP mobile House bank - xSyP serial vs parallel design thoughts
Replies: 37
Views: 581

Re: LFP mobile House bank - xSyP serial vs parallel design thoughts

but going past three **strings** in parallel can lead to balancing issues. I believe that is true, even with a proper balanced wiring scheme using buss bars in place, as per "Method 3" here: You're applying lead acid rules to LiFePO4 here. Since LiFePO4 does not have an inherent balancing mechanism...
by billvon
Jan 15 2019 11:15pm
Forum: General Discussion
Topic: Fiat Chrysler pays millions...
Replies: 17
Views: 249

Re: Fiat Chrysler pays millions...

I went to KG & early gradeschool Huntington Beach until a couple years before that, and I remember me and my younger brother having (sometimes a lot of) trouble breathing in "sports", and him going to the hospital a few times. After we moved to Phoenix, we only really had problems during the dust s...
by billvon
Jan 15 2019 11:14pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

What you describe isn't familiarity so much as it is direct control. Putting very complex and dangerous operations in the hands of others certainly is something that should give a person pause IMO. Yet we get in airplanes as passengers all the time. Funny about the sunbathing bit. I was just readin...
by billvon
Jan 15 2019 10:53pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Well, a couple of other options would be some clever long-term energy storage or shipping energy from the sunny parts via High Voltage DC transmission lines (very low losses). OK let's run the numbers on the latter. A HV transmission line from Arizona (big generation potential) to New York (big loa...
by billvon
Jan 15 2019 7:29pm
Forum: Battery Technology
Topic: LFP mobile House bank - xSyP serial vs parallel design thoughts
Replies: 37
Views: 581

Re: LFP mobile House bank - xSyP serial vs parallel design thoughts

This gives you easy redundancy. Each half of the bank is still 12V, so if one cell dies, you just split the bank IF you remove that string once the cell dies. But you have to stay on top of it. Letting that string sit at a bizarre VPC while the system is trying to cycle it can be bad news. So in th...
by billvon
Jan 15 2019 6:54pm
Forum: Motor Technology
Topic: Room temperature superconductors
Replies: 6
Views: 181

Re: Room temperature superconductors

Where did you find the info that superconductors also have great thermal conductivity coefficients? An article in Nature a while back talking about thermal conductivity in ceramic high temperature superconductors. But this is a metallic hydride rather than a ceramic, so that doesn't necessarily app...
by billvon
Jan 15 2019 6:36pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

I somewhat agree, but I draw a different conclusion. Falling from roofs is not an integral part of photovoltaic operation. It is a kind of industrial accident that is well understood, is specific to certain types of activities (photovoltaic deployment on pitched roofs is one tiny subset - gutter cl...
by billvon
Jan 15 2019 6:11pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

I brought this up before. There is a group here that doesn't consider inherently dangerous handling of nuclear materials as an integral part of nuclear reactor operation, and then goes to compare nuclear safety with solar installers falling from roofs. Some logical acrobatics, not less. Personally ...
by billvon
Jan 15 2019 5:46pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 3226
Views: 109260

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Are you saying that machines never bind up and fail to do what they are supposed to do? Sure, they can. It is merely unlikely. Because most of my paying work comes from machines doing exactly that. And those machines don't have to cope with stuff like superheated water or molten salt. True. But the...