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Old 06-30-2020, 02:59 PM   #1 (permalink)
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Hyllion ERX - A Natural Gas Hybrid Electric Semi

This is Hyliion's new hybrid system. It is an electric truck with a natural gas powered generator to charge the battery. It can run EV only for 25 miles to enter EV only areas in cities and cruise 1,300 mile on a tank.

This is a great idea for a realistic way to transition long-haul trucking to alternative fuels. Natural gas stations already exist and NG trucks have very low emissions. It is likely actually simpler than a modern diesel truck with all the emission controls and little fuel economy tweeks.

https://www.hyliion.com/erx-page/#/performance


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Old 07-04-2020, 08:14 AM   #2 (permalink)
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Amazing it can hold enough CNG to run 1300 miles working a load. Or can it?
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Old 07-04-2020, 10:21 AM   #3 (permalink)
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Using 6mpg, you need 216 gallons of diesel so perhaps 1000 gallon high pressure gas. The tanks shown look almost big enough for1/2 that, one on each side.

The CNG transit vans I drove had a 50 gallon tank where the gasoline tank was but I could only get maybe 60 miles out of it before refill. Some days I refilled 3 times.
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Old 07-05-2020, 10:17 PM   #4 (permalink)
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The CNG transit vans I drove had a 50 gallon tank where the gasoline tank was but I could only get maybe 60 miles out of it before refill. Some days I refilled 3 times.
Do you remember how many GGEs it could hold?
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Old 07-06-2020, 06:43 AM   #5 (permalink)
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Amazing it can hold enough CNG to run 1300 miles working a load. Or can it?
It has a side tank on each side and a giant cabinet tank behind the cab.

Also as a hybrid it should be more efficient than CNG converted diesel.

EDIT: I believe the 1300 mile range is for liquid natural gas which is about 4x denser than compressed natural gas.

Last edited by JSH; 07-06-2020 at 06:52 AM..
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Old 07-06-2020, 09:34 AM   #6 (permalink)
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Do you remember how many GGEs it could hold?
The outfit I worked for was hugely non technical, so, unfortunately no. They had issues scheduling how far I could run before refueling even after I gave them a tank range.

Liquid gas is comparable to gasoline for BTU content, so if that's the case 1300 miles is much easier.
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Old 07-06-2020, 11:31 AM   #7 (permalink)
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I wonder what happened to that one guy who was on a mission to improve MPGs on a huge fleet? He kept going on and on about HHO, insisting that testing proved a benefit.
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Old 07-07-2020, 12:27 PM   #8 (permalink)
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Some more detail now that I have access to a computer:

Agility LNG side tanks are up to 160 DGE each
Agility CNG side tanks are up to 60 DGE each
Agility CNG Cabinet tanks are up to 175 DGE
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Old 07-07-2020, 05:38 PM   #9 (permalink)
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What is a DGE? Distance per Gallon Equivalent?
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Old 07-07-2020, 08:44 PM   #10 (permalink)
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Quote:
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What is a DGE? Distance per Gallon Equivalent?
Diesel gallon equivalent

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