The other advance that made LED lighting possible was low cost PWM LED drivers on a chip or with few components. Even today an LED cannot take a continuous high current. ________________________________ From: EV <[email protected]> on behalf of Cor van de Water via EV <[email protected]> Sent: Wednesday, July 25, 2018 2:46 PM To: Electric Vehicle Discussion List Cc: Cor van de Water; brucedp5 Subject: Re: [EVDL] Reduce EV: Charging load on the grid ...
Bruce, If you ever saw the old LEDs, I received one from my dad in the early 80s and while their life is astonishing, they will run for decades and still work, they are no comparison to modern LEDs for 2 major reasons: - There was no white. LEDs came in red, yellow, green and that was pretty much it. At some point someone figured out a way to make blue and it took until the beginning of this millennium before white LEDs became generally available, made from a very shortwave LED illuminating a white phosphor which released the white light. The amount of light delivered was not very high in any of these, which is the second reason: - Efficiency. While TL and CFL (fluorescent) bulbs were several times more efficient than incandescents, the LEDs were great as indicator lights but horrible as light source due to their low light output. Over time that has improved to the point that there are now LEDs that you must not drive with more than 1mA if you want people to look at them directly, because they are so blindingly bright. That is why a 10 Watt LED can comfortably replace a 60 – 100W incandescent lamp and even provide much the same soft warm light profile so a casual observer is unable to distinguish between the two used side by side, except for the waste heat produced by the incandescent. Regards, Cor. Sent from Mail for Windows 10 From: brucedp5 via EV Sent: Wednesday, July 25, 2018 2:28 PM To: [email protected] Cc: brucedp5 Subject: [EVDL] Reduce EV: Charging load on the grid ... [ref http://electric-vehicle-discussion-list.413529.n4.nabble.com/Charging-load-on-the-grid-NOT-tp4690636.html ] % Here's a link to help/support what Lawrence posted about: https://en.wikipedia.org/wiki/LED_lamp A LED lamp or LED light bulb is an electric light for use in light fixtures that produces light using light-emitting diode (LED). ... As of 2016, LEDs use only about 10% of the energy an incandescent lamp requires ... [some brucedp history] ... after finishing my Vietnam era 70-74 military requirement and was 'back in the world' https://www.google.com/search?q=vietnam+back+in+the+world (U.S.A.), leds were not (but should have been) well marketed for use as lighting. Old school thinking still touted using more (up-front) expensive flouresent lighting to save electricity costs over (ancient-tech) incandescents. I had a hard time understanding that when leds were (as Lawrence mentioned) so much more energy efficient. But then back then, I also had a hard time breathing the raw gasoline fumes as ice drove by, and the lack of vapor controls at gas pumps. [fast-forward 4 decades] ... as I previously posted, I am making efforts to relocate closer to the San Antonio (SA), TX VA (Veterans) Hospital facility (VA sez I can't get assigned there until I have a SA mailing address - think old school government/military paper metrics). Until then, I am running back and forth between where I have been staying since the beginning of the year (near the Temple, TX VA Hospital) and going hours south to work with a SA Realtor. The owners of the place I am staying at have been kind to me. Locals wonder why I am paying twice as much for a room at this business rather than at an apt at half the cost (and a 1yr long lease). But it seems my continuous monthly stay is funding repairs and upgrades for the owners ... When the 4ft dual tube flouresent ceiling light fixture https://www.1000bulbs.com/product/29538/PLAS-1LT1.html?gclid=EAIaIQobChMI54O_ooG73AIVAqrsCh2RgAF3EAkYAyABEgIubvD_BwE in my room started flickering, the owner replaced it with a 1ft x 1ft 12W led ceiling panel https://www.ebay.com/itm/64W-42W-36W-18W-LED-Troffer-Panel-Light-Recessed-Dropped-Ceiling-Down-Fixture-US/163163165493 The owner also replaced some of their outdoor florescent lighting with these led panels. They are bright, cost effective, and will have a much longer life. Below are links to newswire items. The 1st is how off peak charging lets UK EV charging use the existing grid (hopefully they will still be planning grid upgrades over time). The 2nd is how EV ignorant IL media says L2 charging will blow up existing pole transformers (don't you just love their stoopid statements that are really just their opinions?). And 3rd,once again north-western European countries are showing the way to be green by reducing ice-generator use to power festivals: % https://www.fleetnews.co.uk/news/environment/2018/07/25/ofgem-to-incentivise-ev-owners-to-charge-off-peak Ofgem to incentivise EV owners to charge off-peak 25/07/2018 -10 hours ago Ofgem has set out proposals to support the millions of new electric vehicles (EVs) ... more flexible use of the energy system will allow more EVs to be charged from the existing grid and reduce the need for expensive new power stations and extra grid capacity to be built ... make the electricity system more efficient by giving generators and other users more choice and flexibility on how they connect to the grid ... ... https://www.driving.co.uk/news/electric-car-drivers-use-flexible-charging-save-money-reduce-drain-grid/ Electric car drivers should use 'flexible charging' to save money and reduce drain on grid 24 July 2018 (IL EV-ignorance BS/misinformation) https://springfielddaily.com/technology/springfield-encourages-off-peak-charging-for-electric-cars/ Springfield encourages off peak charging for electric cars Jul 23, 2018 Level 2 chargers use far more power than most residential appliances. Drawing that much power can strain local transformers. Local transformers make it possible for consumers to use the wider grid, but they can only handle so much power at a time. Most transformers are only rated for 10 to 50kVA, and single Level 2 charger can draw 7kV. A cluster of Level 2 chargers could potentially overload the local transformers. This is especially true in the summer months when air conditioners are running and the normal electrical load is much higher. To avoid potential overloads, the city wants Level 2 owners to charge their vehicles in off peak hours ... https://springfielddaily.com/wp-content/uploads/2018/07/transmission.jpg https://www.pv-magazine.com/2018/07/24/festivalgoers-benefit-from-battery-tech-advances/ Festivalgoers benefit from battery tech advances Jul 24, 2018 Greener and Alfen joined forces ... as the “world's first fully mobile and off-grid EV charging hub” ...displace portable diesel generators on the northern European festival scene ... partners removed the tell-tale roar of portable diesel generators from the Awakenings Easter Special in Amsterdam.nl For EVLN EV-newswire posts use: http://evdl.org/archive/ {brucedp.neocities.org} -- Sent from: http://electric-vehicle-discussion-list.413529.n4.nabble.com/ _______________________________________________ UNSUBSCRIBE: http://www.evdl.org/help/index.html#usub http://lists.evdl.org/listinfo.cgi/ev-evdl.org Please discuss EV drag racing at NEDRA (http://groups.yahoo.com/group/NEDRA) -------------- next part -------------- An HTML attachment was scrubbed... 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