Search found 4027 matches

by Punx0r
Apr 24, 2018 3:06 am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Please make the stupid stop :cry:
by Punx0r
Apr 21, 2018 5:24 pm
Forum: EV Business World
Topic: Tesla Model 3
Replies: 327
Views: 18030

Re: Tesla Model 3

I thought the advantage of induction motors over BLDC was lower cost due to the lack of rare-earth magnets? Torque density for BLDC is supposed to be greater than induction. Increasing the number of components in a battery (or any system) ought to decrease reliability, but I was under the impression...
by Punx0r
Apr 21, 2018 4:53 pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Magazine feature by Octopus Group investment group in the UK. They have fingers in many pies but have an arm for energy projects. The leader of this group says RE is the future and that the intermittency of wind & solar is not a major problem and can be solved with battery storage and load managemen...
by Punx0r
Apr 21, 2018 4:27 pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

In 2017 Denmark met 44% (14.7 TWh) of its annual electricity demand with wind power: https://cleantechnica.com/2018/01/06/44-wind-denmark-smashed-already-huge-wind-energy-records-2017/ It's targeting 50% by 2020 with solar and biomass taking the total to 80% generated from RE. Closer to home, the UK...
by Punx0r
Apr 21, 2018 3:31 pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Now ,..how about a real scientific experiment that can prove conclusively what the world climate will do with increasing co2 ? and presumably your assertion is that CO2 has no effect on global temperature? Can you produce even a single piece of even semi-scientific research to support that? if you ...
by Punx0r
Apr 20, 2018 3:24 am
Forum: EV Business World
Topic: Tesla Model 3
Replies: 327
Views: 18030

Re: Tesla Model 3

They also have a huge edge in the cost of battery manufacturing where as the others have to outsource adding a huge cost. True, the gigafactory is their ace card at the moment. I think they will need to keep innovating or die - keep pushing the tech. Performance they have pretty much nailed, but ne...
by Punx0r
Apr 19, 2018 5:21 pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Stop trolling. You cannot possibly be that ignorant or misinformed.
by Punx0r
Apr 19, 2018 9:32 am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

"known" fossil fuel reserves are (obviously) known. The CO2 released from burning them is known. The warming effect of raised CO2 on the planet is known. The projection of warming based on further CO2 is predictable to a good degree of confidence. This is established science. Refuting it will requir...
by Punx0r
Apr 19, 2018 9:26 am
Forum: EV Business World
Topic: Tesla Model 3
Replies: 327
Views: 18030

Re: Tesla Model 3

I see the biggest challenge to Tesla being the existing large ICE car manufacturers. Now the EV drivetrain is become mature and components & systems being offered by OEMs, it's becoming easier for them to nail together an effective EV and leverage their considerable existing manufacturing experience...
by Punx0r
Apr 19, 2018 3:23 am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Very true. The security for a nuclear plant and the fuel & waste supply chain must be a nightmare if you need to prevent a terrorist attack or theft. It also happend that they needed imports during very hot summers. Often some nukes are in maintainace mode during summer and when it is hot and dry fo...
by Punx0r
Apr 18, 2018 10:01 am
Forum: Large EV General Discussion
Topic: XING Mobility Miss R - Electric Supercar Concept
Replies: 6
Views: 139

Re: XING Mobility Miss R - Electric Supercar Concept

What's the crack with immersion cooling of pouch cells? From what I've read, tab cooling is 3x more effective than cold plates sandwiching the cell, due to the terrible thermal conductivity through the cell layers. So even with liquid cooling, unless the tabs are also submerged it wouldn't be very e...
by Punx0r
Apr 18, 2018 9:57 am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

So for $10billion according to that Wikipedia page you get a 2.4GW/2400MW nuclear reactor like in Belarus...If we could build x2.8 Belarus power stations for the $2.8billion a year over ten years $28billion dollars than ideally we could have 2.8x 2400MW = 6720MW or 6.72GW nuclear power-station roug...
by Punx0r
Apr 18, 2018 9:42 am
Forum: Motor Technology
Topic: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+
Replies: 53
Views: 3521

Re: Neumotor 8057/75 middrive project, belt drive, adding halls, 10kW+

But at only 500 RPM and same 14kW, the power should be limited to about 2kW on the shaft to stay within the specs. Check how much power your motor actually outputs at 500rpm - it will be a lot less than 14kW! As a sense check I would take motor stall torque, multiply by driver pulley radius and che...
by Punx0r
Apr 17, 2018 7:35 am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

20°C (70°F) and sunshine here and everything is growing. February is usually about the time it stops going down to freezing at night. We're much further North than New York as well (similar latitude to Quebec and Moscow), thanks solely to the Gulf Stream. If Artic warming continues there is a real d...
by Punx0r
Apr 16, 2018 7:49 am
Forum: E-Scooter and Motorcycle General Discussion
Topic: EU Road Legal Electrification (???)
Replies: 13
Views: 1152

Re: EU Road Legal Electrification (???)

Could you have the bike tested/certified in another country (where the rules are more friendly to one-off vehicles) and "import" it to your home country? I have known people from the UK who lived in an EU country, but used their UK car and didn't register it in their new home country. The only requi...
by Punx0r
Apr 16, 2018 4:33 am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

OK, I concede, you two are correct. The only way to prevent storms bringing down power lines and causing a blackout is to burn coal. Driving a generator with a propeller instead of a steam turbine clearly just doesn't work and it never will. I imagine the wildfire currently ripping through Sydney is...
by Punx0r
Apr 15, 2018 5:31 pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Well if that's the case why don't you quote the passge from an official report to the effect of "the inherent unreliability of wind turbines was a major contributor", or "if SA had had 100% coal generation a blackout would not have occured"? Because it seems pretty clear to me the root cause was win...
by Punx0r
Apr 15, 2018 11:29 am
Forum: Battery Technology
Topic: How to measure -60V to 1000V
Replies: 15
Views: 675

Re: How to measure -60V to 1000V

I guess anything grid-related they're used to kV so don't think twice about using it. However, I imagine it's actually a different kettle of fish with a battery system because it's always "live" unless cleverly designed with multiple contactors/disconnects to break up the series string.
by Punx0r
Apr 15, 2018 8:46 am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

Either you dont bother to read the links, or you have trouble comprehending what is printed. Funny enough, I skipped the 720 page report and focused on the passage you quoted, erroneously believing it would contain the information to support your assertions. AEMO said unforeseen separation and comp...
by Punx0r
Apr 15, 2018 7:52 am
Forum: EV Business World
Topic: Tesla Model 3
Replies: 327
Views: 18030

Re: Tesla Model 3

Point being, (as i said before). most successful companies do re-invest money, AND post a profit, AND pay Dividends, Bonds, share buy backs, etc, And often build a cash reserve as well for future acquisitions. It is not normal for a business to make sufficient margin to fund all those expenses and ...
by Punx0r
Apr 15, 2018 4:35 am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

I don't see how that means wind turbines were an inherent contributor to the blackout. If those wind farms had been coal plants instead but with the same fault-detecting control gear then the blackout would have occured just the same. One difference ought to be the ease of restarting a grid with a g...
by Punx0r
Apr 14, 2018 12:09 pm
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

The article I linked has a very different account of what occurred and what was to blame. Do you have anything to support your argument that it was the wind turbines themselves that caused the blackout? When the 22 high-voltage power pylons were blown over, a huge chunk of power generation was cut o...
by Punx0r
Apr 14, 2018 5:32 am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

The state of affairs in South Australia is quite interesting. They had a huge state-wide blackout in 2016 that was blamed on the unreliability of renewable energy but was actually caused by the worst storm in 50 years knocking over 22 high-voltage pylons, causing a cascade of safety disconnects to k...
by Punx0r
Apr 14, 2018 5:18 am
Forum: E-Vehicles General Discussion
Topic: Wind and Solar vs Coal, Gasoline, Nuclear
Replies: 1863
Views: 50119

Re: Wind and Solar vs Coal, Gasoline, Nuclear

While I initially thought this news would have TheBeastie and HillHater dancing for joy at the thought of burning mountains of coal to power what is effectively a dumpload, it seems it's not really the case: According to a spokesperson from Hunter Energy, it expects roughly 5% of the energy from the...
by Punx0r
Apr 14, 2018 5:01 am
Forum: Motor Technology
Topic: Advanced DC K91-4003 max voltage
Replies: 5
Views: 106

Re: Advanced DC K91-4003 max voltage

Depending on how stiff your LiFePO4 pack is and how hard you lean on it you may find the voltage sags below the 115V nominal, so when you're giving it the beans you may not actually be that far above the motor's 96V rating. Brushed motors seems to work fairly well in drag racing where they are run a...