rjtumble

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How many miles would a diesel semi cover in the same amount of time?
 


TRECAM06

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How many miles would a diesel semi cover in the same amount of time?
Legally (with mandates on how long a single driver can drive and how fast most Semi Trucks are able to go, keeping their logs and doing their weight checks) You are allowed 11 hour shifts, most governors are set to 70. About 1480-1520 miles with NO BREAKS or CITY DRIVING at MAX SPEED. (70MPH*48HRS*(11HRS/24HRS))

To note it seems strange to me that they were able to go so far over what the supposed limit should be either these trucks don't have governors or they didn't keep up with FMCSA guidelines. but Its worth noting that you get a large part of the day where you can't drive as a single operator so its not like charging vs filling up is really that much of a problem. Everyone gets the same 14 hours a day to do their 11 hours.

But in the case of two operators WITH NO BREAKS or CITY DRIVING at MAX SPEED,
70MPH * 48HRS ≈ 3360miles
 

Challeco

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How many miles would a diesel semi cover in the same amount of time?
How much would the diesel cost the environment in the same time? How much would the diesel back up traffic because it was taking up two lanes trying to pass at 3 mph faster than the truck it was passing? How would the diesel handle the severe down hill grades with glowing red brake drums because it doesn't have regenerative braking? For how much potential the Semi has to reduce the carbon footprint of the trucking industry, improve the revenue the owner/operators retain, and improve traffic issues related to semis, Tesla should be making it their flagship product.
 

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And managed 420 miles in a single charge, filled to the maximum GVW.

Of course it was 420 again.

-Crissa
Ask the question 10 times. Add up the answers. Yep, 420

Coincidence? I don't think so....
 

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I was talkin to a dude in Sacramento who was saying theres some tesla semis that pick up stuff in reno area
and come to CA to drop off and go back with more charge than when they left.
if thats true its kinda crazy!
 


Crissa

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I was talkin to a dude in Sacramento who was saying theres some tesla semis that pick up stuff in reno area
and come to CA to drop off and go back with more charge than when they left.
if thats true its kinda crazy!
I don't think this is possible, though you do get fairly good regen on the downhill side, you're still pushing against the air.

I can attest is does take alot less fuel to get from Reno to Sacramento, it still takes much of the tank.

-Crissa
 

firsttruck

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I don't think this is possible, though you do get fairly good regen on the downhill side, you're still pushing against the air.

I can attest is does take alot less fuel to get from Reno to Sacramento, it still takes much of the tank.

-Crissa


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The most spectacular example of regenerative braking are trains that are used in Scandinavia, heavily loaded with iron ore that is transported to the coast:

"In Scandinavia the Kiruna to Narvik electrified railway carries iron ore on the steeply-graded route from the mines in Kiruna, in the north of Sweden, down to the port of Narvik in Norway to this day. The rail cars are full of thousands of tons of iron ore on the way down to Narvik, and these trains generate large amounts of electricity by regenerative braking, with a maximum recuperative braking force of 750 kN. From Riksgränsen on the national border to the Port of Narvik.

The trains use only a fifth of the power they regenerate. The regenerated energy is sufficient to power the empty trains back up to the national border. Any excess energy from the railway is pumped into the power grid to supply homes and businesses in the region, and the railway is a net generator of electricity."

(via https://en.wikipedia.org/wiki/Regenerative_brake#Conversion_... )


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A Scandinavian study tour
Railway Division of the IMechE 2023 annual railway technical tour
6th July 2023
By David Shirres, Rail Engineer, BSc CEng MIMechE DEM
https://www.railengineer.co.uk/a-scandinavian-study-tour/

.....
LKAB has 17 pairs of IORE electric locomotives, which have a top speed of 80km/h when unloaded and 60km/h when loaded. At 10,800kW (14,500 hp) and 2 x 180 tonnes, these are amongst the world’s most powerful and heaviest locomotives, with steel body panels 4cm thick. During the descent to Narvik, their regenerative brakes recover around 25% of the energy consumed which is sufficient power to haul empty trains back to Sweden.

A CATO (Computer Aided Train Operation) system is being installed on the locomotives and throughout the route. This provides the driver with an advisory speed for the optimum speed profile to reach a passing loop at the correct time. This is expected to give further energy savings of around 20%.


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Perpetual motion electric truck, transporting cargo with zero fuel costs
Journal of Energy Storage 72 (2023) 108671
https://pure.iiasa.ac.at/id/eprint/19010/1/1-s2.0-S2352152X23020686-main.pdf


ABSTRACT
The transportation sector is going through a rapid transition to electric vehicles to minimize our reliance on fossil fuels and reduce CO2 emissions. This is also happening in the cargo transport sector, with a rapid deployment of electric trucks. This paper proposes that the replacement of diesel trucks with electric trucks should first happen on routes where cargo is delivered from a location with a higher altitude to a location with a lower altitude. This way, the regenerative braking system of the truck can completely recharge the truck's battery. This paper in- vestigates scenarios where electric trucks could operate indefinitely without grid electricity to charge their batteries.

This concept was named perpetual motion electric truck (PMET).

Results show that with an average road slope of 5 %, 60 km/h speed, the weight of the cargo should be at least 1.32 times the weight of the truck, PMET can be achieved. PMET is an interesting alternative to reduce electricity demand and increase the sustainability of the transport sector.

.....
Tesla Cybertruck Pepsi's Tesla Semi Covers 1,600 Miles In Under 48 Hours 1695154249070


.....
Tesla Cybertruck Pepsi's Tesla Semi Covers 1,600 Miles In Under 48 Hours 1695147659239

Fig. 7. (a) Electric dump truck used in Swiss mine (eDumper), (b) operation description of the eDumped, [31] (c) real case of PMET system between a limestone mine
and a cement factory.

.....
Tesla Cybertruck Pepsi's Tesla Semi Covers 1,600 Miles In Under 48 Hours 1695147798839


Fig. 8. (a) Biomass growth potential in California [37], (b) topography of California [38], (c) biomass PMET case study, (d) road slope grade.

.....
5. Conclusions
Perpetual motion electric truck is a novel method of conserving energy by transporting cargo down a mountain and charging the truck's battery with its regenerative brake system. PMET uses a renewable braking system to convert the gravitational energy storage released as the cargo descends the mountain into electrical energy to store in the battery and uses that energy to re-deliver the empty truck up the mountain.

Thus, PMET achieves perpetual motion of the truck by making full use of the gravitational potential energy of the cargo when descending the hill in the delivery downhill scenario. We assume a renewable braking efficiency of 90 % for the electric truck motor, a mechanical transmission efficiency of 90 %, and a battery cycle efficiency of 90 %. Under this assumption, PMET can be achieved when the average road gradient is 5 %, the electric truck speed is 60 km/h, and the cargo weight is 1.32 times that of the electric truck. The study shows that the average slope, cargo-to-truck weight ratio, and operating speed affect the PMET realization. The greater the average slope, the greater the cargo-to-truck weight ratio, and the lower the operating speed, the easier PMET can be realized. PMET can be applied in cases where products like biomass, biofuels, commodities, manure, municipal waste, and natural resources can be produced on the top of a mountain to be consumed, processed, or exported on the bottom. PMET should be widely considered during the transition from diesel and gasoline to electric trucks, particularly due to the significant amount of electricity recovered by transporting the cargo down the mountain and the lack of investment required for the charging infrastructure.


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The Tesla Semi is about to electrify Canada’s logging sector
By Simon Alvarez Posted on April 8, 2021
https://www.teslarati.com/tesla-semi-logging-trucks-canada/

.....
Domenico Ianndinardo, Mosaic’s vice-president and chief forester, noted that electric trucks like the Tesla Semi are actually a good fit for the logging industry, especially in Vancouver Island, where much of the timber is located in higher elevations. This means that a significant part of the energy consumed by the trucks when they go up to the mountains could be replenished as they travel back, thanks to features like regenerative braking. “As they come down the hill loaded, they’re able to regenerate energy and put that back into their batteries so in this cycle going up the hill empty and coming down the hill loaded they can generate their own battery supply on a daily basis,” the Mosaic Forest Management executive said.


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This 34,000-Ton ‘Infinity Train’ Will Recharge Itself ... With Gravity
It’s all in the power of kinetic energy. Oh, and batteries.
By Caroline Delbert
Published: Mar 9, 2022
https://www.popularmechanics.com/science/energy/a39372219/self-charging-infinity-train/

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BEV truck never needs external charge & even gives power TO the grid


Switzerland's electric mining dump truck charges itself
This self-charging mining truck is the world's largest electric vehicle
It saves 50,000 tons of diesel annually

Is a converted diesel truck. This BEV conversion actual supports
higher carrying payloads than the original diesel version. The
original deisel truck used tons of fossil fuel and suffered from very
frequent & expensive brake replacements.


This massive 45-ton electric dump truck never uses more energy than it
generates on its own — here's how that works
By Graham Rapier
Aug 24, 2019
https://www.businessinsider.com/edumper-121-ton-electric-dump-truck-2019-8?r=MX&IR=T


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eDumper - The BIGGEST EV in the world!
Jun 21, 2019
Lucas di Grassi

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Electric Dumper | Heavy Duty EV that recharges itself | Elektro Dumper
| eDumper
EDumper is manufactured by German Company Kuhn Schweitz,
Elektro Dumper is 30-feet long, 14-feet wide, 14-feet tall and weighs
45 tonnes when empty. It is powered by a 4.4-tonne battery – about the
weight of a teenage elephant – with a capacity of 600 kWh.
eDumper is designed in such a way that a failing cell cannot affect
neighbouring cells.

---




------------


part of eDumper video with narration by eCharged

---



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eMining uses the latest technology
and safe batteries for your products
https://www.emining.ch/en/technology.html

.....
THE ROLE OF THE UNIVERSITIES OF APPLIED SCIENCE IN THE eDUMPER PROJECT
THE BINARY EDUCATION SYSTEM IS THE BEST PREREQUISITE FOR LINKING
THEORY WITH PRACTICE

On the basis of experience, research and development concentrates on
the main drive and power supply strand. The academic partners specify
the power and lifespan parameters for the specific order based on
lifespan models tested on ESReC (Energy Storage Research Center)
equipment. In terms of stationary operation, this involved primarily
emergency power supplies and uninterruptible power supplies for
computer centres and operating theatres in hospitals, which resorted
to energy stored in batteries. Almost as a by-product of the rapid
eMobile development which uses high-voltage batteries, but also thanks
to experience with direct-current batteries in all voltage categories,
** energy can now be used on a time-shifted basis and can even be
optimally fed into the grid on a deferred basis. **

This is where the interests of the Federal Office of Energy come to
the fore. In the implementation of the Swiss Federal Council's energy
strategy, electrical mobility and grid storage play a key role, and
are also eligible for financial grants.

USE IN STEEP TERRAIN
eDUMPER NO.1 AS THE FIRST PLUS ENERGY VEHICLE

Between August and November 2017 the components evaluated in
accordance with the calculated specifications were installed into the
empty chassis of a used HD 605 7. The hydraulic pumps for the
multi-disk brakes, tipper drive, servo support and pre-loading of the
auxiliary braking system are driven by an additional 120 kW electric
motor produced in the Bernese Oberland. Space was made available for
the 4 battery blocks, 710 kWh in total, in the engine compartment, the
cooling system and the space previously occupied by the diesel tank. .

**BFH - ESReC: lifespan model; NTB: thermal management of the battery
to increase working life and ensure reliable operation; EMPA: security
and reliability of the converted vehicle and electrical systems.


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eMining’s eDumper is the world’s largest electric truck
** has large image of concept
https://www.electrive.com/2018/04/23/empas-edumper-is-the-worlds-largest-electric-truck/

.....
The eDumper was rebuilt on the basis of a Komatsu HD 605-7 dump truck.
In order to optimally size the electric drive, researchers at the Bern
University of Applied Sciences at the Institute for Energy and
Mobility Research IEM equipped the conventional model with a variety
of sensors so that numerous measurement data could be obtained.

The BFH Energy Storage Research Centre then dealt with the evaluation
of suitable battery cells and the cooling of a battery module.

In order to guarantee the longevity and robustness of the technology,
the Interstate University of Applied Sciences Buchs investigated the
vibrations of the diesel dump truck in real use and the heat emission
of the battery cells of the future eDumper. This research team also
designed the thermal management for the battery pack, calculated the
necessary strength of the battery holders and the design of the
welding seams. It is also responsible for monitoring the eDumper
battery in real use.

To ensure the fire safety of such a large battery cell, the Swiss
Federal Laboratories for Materials Science and Technology Empa
examined the behavior of the Li-Ion cells used in the event of a short
circuit or mechanical damage. Never before has a land vehicle been
equipped with such a huge battery pack. The eDumper is now designed in
such a way that a failing cell cannot affect neighbouring cells.



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fhteagle

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No comment from Bill Gates? Not even a teeny tiny retraction?

Typical...........
 

Cyberman

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I was talkin to a dude in Sacramento who was saying theres some tesla semis that pick up stuff in reno area
and come to CA to drop off and go back with more charge than when they left.
if thats true its kinda crazy!
I just can't imagine where a 132 mile trip with 5000 feet of elevation drop (that's 38 feet per mile average) will result in a net gain in charge. jmho
 
 




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