Originally posted by Kooldino
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VERY cool new cars
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Gigabyte P35-DS3L with a Q6600, 2GB Kingston HyperX (after *3* bad pairs of Crucial Ballistix 1066), Galaxy 8800GT 512MB, SB X-Fi, some drives, and a Dell 2005fpw. Running WinXP.
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Would the frequent restarts actually be necessary with a large battery and big caps? I thought what made hybrids superior was that their gas engine could always run at its favourite speed, not that it only runs part of the time.
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But why are there no gas (and I mean gas, not gasoline) turbine hybrid concepts? There are even gas turbine production cars. Or biodiesel hybrids? Or Ethanol hybrids?
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Originally posted by WombatDiesel's high operating temperature? I'm just guessing. You've got to keep diesel under heat/pressure, and that doesn't seem like it would work well with the instant on/off requirements of effecient hybrid vehicles.
Perhaps if your guess is correct, they could make the engine run 100% of the time, but when on electronic assistance only inject enough fuel to keep the engine from stalling.
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Originally posted by azWould the frequent restarts actually be necessary with a large battery and big caps? I thought what made hybrids superior was that their gas engine could always run at its favourite speed, not that it only runs part of the time.
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Originally posted by azBut why are there no gas (and I mean gas, not gasoline) turbine hybrid concepts? There are even gas turbine production cars. Or biodiesel hybrids? Or Ethanol hybrids?
Where are you going to fill a bio or ethanol car in the US? Diesel would be a more logical step to take.
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Gas Turbines can be very efficient, but they do not scale down well. Also maintenance on them is a nightmare....there are very good reasons why a "little" (100-600 SHP) one costs $50,000+ USD.
The most efficient Gas Turbines in the world are stationary and used mostly to produce electricity from Natural Gas - I think they are almost 35% efficient for the biggest GE models.
The most attractive thing about them is that their duty cycles are extremely good...on the order of a year or so before they need to be taken out of service for an overhaul. Nothing else comes close to that long of a duty cycle in power generation other than Hydroelectric power.
[Edit] Gas turbines can theoretically burn nearly anything, so running ethanol, biodiesel, diesel or JP-A is not really much of an issue. Thermal efficiency of small gas turbines is horrendous, however. [/EDIT]Hey, Donny! We got us a German who wants to die for his country... Oblige him. - Lt. Aldo Raine
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Originally posted by KooldinoPerhaps if your guess is correct, they could make the engine run 100% of the time, but when on electronic assistance only inject enough fuel to keep the engine from stalling.Gigabyte P35-DS3L with a Q6600, 2GB Kingston HyperX (after *3* bad pairs of Crucial Ballistix 1066), Galaxy 8800GT 512MB, SB X-Fi, some drives, and a Dell 2005fpw. Running WinXP.
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You missed my point. Your engine is ALREADY idling when not needed. But that's still a significant/majority of the time you're in the car. A hybrid with an idling engine would be just like a conventional car, and have the same lousy efficiency.Gigabyte P35-DS3L with a Q6600, 2GB Kingston HyperX (after *3* bad pairs of Crucial Ballistix 1066), Galaxy 8800GT 512MB, SB X-Fi, some drives, and a Dell 2005fpw. Running WinXP.
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Originally posted by WombatYou missed my point. Your engine is ALREADY idling when not needed.
But that's still a significant/majority of the time you're in the car. A hybrid with an idling engine would be just like a conventional car, and have the same lousy efficiency.
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Originally posted by KooldinoHmm, I wonder why there are no hybrids available that are diesels?
PSA Peugeot Citroen has prodcued a protype diesel/hybrid: http://www.greencarcongress.com/2006...ugeot_cit.htmlLaptops: ASUS G750JM: Intel Core i7 4700HQ, 8GB RAM (DDR3-1600), Nvidia GTX 860M, 1 x Samsung 840 EVO 250GB SSD, 1 x WD 750 GB HDD, 17,3" FHD Screen, Windows 8.1 64-bit.
ASUS Vivobook S400CA: Intel Core i5 3317U (1,7-2,6 GHz), 8 GB RAM (DDR3-1600), Intel HD4000, 1 x 500GB HDD, 14" touch-screen (1366x768), Windows 8.1 64-bit.
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Originally posted by KooldinoHmm, I wonder why there are no hybrids available that are diesels?
I believe the French prototype is problematic because of pollution issues. I've heard that production is unlikely to start before 2008-2010 and this is probably an indication that there are still many bugs to fix, otherwise they would be starting on a winner by next year. I know Toyota has had what they consider insurmountable (for the moment) problems with diesel hybrids, but I think their difficulty was to find the compromise between engine weight and longevity on a start/stop regime.Brian (the devil incarnate)
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