Books with an X: Paul LarsenU. Ancient Egypt in Context, Bruce G. Trigger, American University in Cairo:
KunstlerCastKunstlerCastPeak Prosperity ] Introduction to battery electric trucks Heavy-duty diesel-engine trucks agricultural, mining, logging, construction, garbage, cement, wheelers are the main engines of civilization.
Without them, no goods would be delivered, no food planted or harvested, no garbage picked up, no minerals mined, no concrete made, oil and gas drilled, and roads built to keep them all rolling.
If trucks stopped running, gas stations, grocery stores, factories, pharmacies, and manufacturers would shut down within a week.
Trucks that matter — that haul 30 tons of goods, pour cement, haul mining ore — can weigh 40 times more than an average car. So scaling batteries up for heavy-duty trucks NRC is impossible now given the state of battery technology. For example, a truck capable of going miles hauling 59, pounds, the maximum allowable cargo weight, would need a battery weighing 55, pounds, and so could only carry about 4, pounds of cargo den Boer et al.
And because a heavy-duty truck battery is so heavy and large, charging takes too long — typically 12 hours or more. Or as Ryan Carlyle, oil company engineer puts it: The necessary energy density numbers are more like 50 times less than they need to be.
The truck will use over half its payload capacity just carrying its own batteries, which is all but unworkable as a freight haulage system.
There are chemical limits to what batteries can do. There are not any commercially available heavy-duty Battery Electric Vehicles BEVs outside the transit bus segment at this time. It is not expected that BEVs can penetrate into the long-haul trucking Harley davidson harvard case study solution in the next several decades, where significant high speed steady-state operations dominate the vehicles duty cycle, without significant advances in battery energy density and BEV recharging technologies.
Electric trucks do exist, mostly medium-duty hybrid that stop and start a lot to recharge the battery. This limits their application to delivery and garbage trucks and buses. These trucks are heavily subsidized at state and federal levels since on average they cost three times as much as a diesel truck equivalent Table 1.
Whenever I do an internet search on electric trucks, something new will pop up. But if you go to the John Deere website there is absolutely nothing about this tractor. John Deere is not working on electric tractors because they require mechanical power that is mobile or portable.
Only internal combustion engines can provide efficient mobile and portable heavy-duty power DTF The Port of Los Angeles thought about using heavy-duty all-electric drayage trucks to improve air quality.
Drayage trucks drive at least miles a day back and forth between the port and inland warehouses. The range is too short because of the battery weight and size. Drayage trucks need to go at least miles a day, but at best an electric truck could go miles before having to be recharged, which would take too long, and require expensive infrastructure to charge each truck several times a day.
Overcoming the long time to recharge by using fast-charging may shorten battery life which would result in the unacceptable expense of a new battery pack before the lifetime of the truck ended Although electricity is available almost everywhere, the quantities required for a fleet of Battery Electric Vehicle BEV drayage trucks are very high and could require significant infrastructure.
Electric trucks coust 3 times more than diesel equivalents ICEV on average. This is substantially more than the cost for a conventional diesel powerplant. It can charge 5 heavy duty trucks ICF per charger: A fleet with 20 E-Trucks in Southern California had to upgrade a transformer on the customer side of the meter.
Earning money from V2G is not likely to be adopted by commercial fleets because they have rigid operating schedules while the grid varies constantly and unpredictably. If the grid tapped into e-truck batteries, it might reduce their range or delay availability Calstart Electric trucks are also not commercial yet because they have too many performance issues, such as poor performance in cold weather, swift acceleration, driving up steep hills, too short a range and battery life, they take too long to recharge, declining miles per day as the battery degrades, all of which make planning routes difficult and inefficient.
It is also much harder to develop batteries for trucks than cars because trucks are expected to last 15 years versus 10 for cars or go for 1 million miles.
Trucks also have to endure more extreme conditions of temperature, vibrations, and corrosive agents than autos NRCand it is hard to make battery packs durable enough for this rougher ride, longer miles, and longevity.
Calstart interviewed many businesses about their reluctance to buy hybrid or all electric trucks, and found their greatest concerns were the purchase cost, lack of confidence in the technology, lack of industry and truck manufacturer support, lack of infrastructure, and the heavy weight Calstart Elon Musk recently tweeted that Tesla will build a semi-truck with absolutely no details, promising to tweet again half a year from now with more information.Nov 11, · Search and browse our historical collection to find news, notices of births, marriages and deaths, sports, comics, and much more.
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