Alternator on a turbo
in [Toyota]
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From: Ray O on 26 May 2010 00:36 "Scribe" <Scribenospam(a)nospam.com> wrote in message news:hth5qj$37u$1(a)news.eternal-september.org... >I read that an experimenter fitted an alternator onto a turbo and got free >charging from the exhaust. This seems like a very logical and obvious thing >to do, and must raise mpg and no fan belts to snap. A beefier alternator >and a larger battery could run electric a/c as well, by using waste energy >from the exhaust. > > Has anyone ever seen such a conversion? A turbo-driven alternator could theoretically power a toaster oven and eliminate the need to cook food on the exhaust manifold on the way home from work. Seriously, the drawbacks to a turbo-driven alternator probably outweigh the benefits. -- Ray O (correct punctuation to reply)
From: Scribe on 27 May 2010 10:53 "Ray O" <rokigawa(a)NOSPAMtristarassociates.com> wrote in message news:hti8m0$k22$2(a)news.eternal-september.org... > > "Scribe" <Scribenospam(a)nospam.com> wrote in message > news:hth5qj$37u$1(a)news.eternal-september.org... >>I read that an experimenter fitted an alternator onto a turbo and got free >>charging from the exhaust. This seems like a very logical and obvious >>thing to do, and must raise mpg and no fan belts to snap. A beefier >>alternator and a larger battery could run electric a/c as well, by using >>waste energy from the exhaust. >> >> Has anyone ever seen such a conversion? > > A turbo-driven alternator could theoretically power a toaster oven and > eliminate the need to cook food on the exhaust manifold on the way home > from work. > > Seriously, the drawbacks to a turbo-driven alternator probably outweigh > the benefits. It doesn't need to run at a constant speed. At tickover revs will be low, but they are anyhow as they are. I just thought about this and go further, 50% of the heat of an engine roughly wasted, 25% to the exhaust and 25% via the radiator. Capturing this heat and using it as in an absorption system for a/c and say a small free wheel piston Stirling generator - coils in the piston and around the cylinder, as used in some cogen units - would improve efficiency. The cogen units produces around 1.1kW. Depending on how much heat is captured the Stirling generator could produce enough power to charge a large battery and use an electric motor to assist in car acceleration - brake regen as well. An engine with a light flywheel can then be used. All that wasted heat can be harnessed to improve efficiency. The technology is here, it just needs engineering.
From: Retired VIP on 27 May 2010 12:19 On Thu, 27 May 2010 15:53:19 +0100, "Scribe" <Scribenospam(a)nospam.com> wrote: > >"Ray O" <rokigawa(a)NOSPAMtristarassociates.com> wrote in message >news:hti8m0$k22$2(a)news.eternal-september.org... >> >> "Scribe" <Scribenospam(a)nospam.com> wrote in message >> news:hth5qj$37u$1(a)news.eternal-september.org... > >>>I read that an experimenter fitted an alternator onto a turbo and got free >>>charging from the exhaust. This seems like a very logical and obvious >>>thing to do, and must raise mpg and no fan belts to snap. A beefier >>>alternator and a larger battery could run electric a/c as well, by using >>>waste energy from the exhaust. >>> >>> Has anyone ever seen such a conversion? >> >> A turbo-driven alternator could theoretically power a toaster oven and >> eliminate the need to cook food on the exhaust manifold on the way home >> from work. >> >> Seriously, the drawbacks to a turbo-driven alternator probably outweigh >> the benefits. > >It doesn't need to run at a constant speed. At tickover revs will be low, >but they are anyhow as they are. > >I just thought about this and go further, 50% of the heat of an engine >roughly wasted, 25% to the exhaust and 25% via the radiator. Capturing this >heat and using it as in an absorption system for a/c and say a small free >wheel piston Stirling generator - coils in the piston and around the >cylinder, as used in some cogen units - would improve efficiency. The cogen >units produces around 1.1kW. Depending on how much heat is captured the >Stirling generator could produce enough power to charge a large battery and >use an electric motor to assist in car acceleration - brake regen as well. >An engine with a light flywheel can then be used. > >All that wasted heat can be harnessed to improve efficiency. The technology >is here, it just needs engineering. Sounds like a very reasonable assessment of the problem. I also read about a guy who glued straps to his boots, drew them up over his shoulders and now flies with Superman. There is no such thing as a free lunch! Perpetual motion machines don't exist. If it seems too good to be true, then is probably is. Keep these statements in mind while you are drawing out your plans for this device.
From: Scribe on 29 May 2010 06:14
"Retired VIP" <jackj.extradots.180(a)windstream.net> wrote in message news:pg6tv5h64st2ftes7t8s8e5fnjpr0npt9a(a)4ax.com... > On Thu, 27 May 2010 15:53:19 +0100, "Scribe" <Scribenospam(a)nospam.com> > wrote: > >> >>"Ray O" <rokigawa(a)NOSPAMtristarassociates.com> wrote in message >>news:hti8m0$k22$2(a)news.eternal-september.org... >>> >>> "Scribe" <Scribenospam(a)nospam.com> wrote in message >>> news:hth5qj$37u$1(a)news.eternal-september.org... >> >>>>I read that an experimenter fitted an alternator onto a turbo and got >>>>free >>>>charging from the exhaust. This seems like a very logical and obvious >>>>thing to do, and must raise mpg and no fan belts to snap. A beefier >>>>alternator and a larger battery could run electric a/c as well, by using >>>>waste energy from the exhaust. >>>> >>>> Has anyone ever seen such a conversion? >>> >>> A turbo-driven alternator could theoretically power a toaster oven and >>> eliminate the need to cook food on the exhaust manifold on the way home >>> from work. >>> >>> Seriously, the drawbacks to a turbo-driven alternator probably outweigh >>> the benefits. >> >>It doesn't need to run at a constant speed. At tickover revs will be low, >>but they are anyhow as they are. >> >>I just thought about this and go further, 50% of the heat of an engine >>roughly wasted, 25% to the exhaust and 25% via the radiator. Capturing >>this >>heat and using it as in an absorption system for a/c and say a small free >>wheel piston Stirling generator - coils in the piston and around the >>cylinder, as used in some cogen units - would improve efficiency. The >>cogen >>units produces around 1.1kW. Depending on how much heat is captured the >>Stirling generator could produce enough power to charge a large battery >>and >>use an electric motor to assist in car acceleration - brake regen as well. >>An engine with a light flywheel can then be used. >> >>All that wasted heat can be harnessed to improve efficiency. The >>technology >>is here, it just needs engineering. > > Sounds like a very reasonable assessment of the problem. I also read > about a guy who glued straps to his boots, drew them up over his > shoulders and now flies with Superman. > > There is no such thing as a free lunch! Perpetual motion machines > don't exist. If it seems too good to be true, then is probably is. > Keep these statements in mind while you are drawing out your plans for > this device. No one is talking about perpetual motion machines - read what I wrote. You are clearly not a free thinker for sure. I'm sure you never knew what a free wheeling Stirling engine is and that they are used in cogen unit. One thing is clear only about 20% of the energy in the tank is used the rest is wasted. Most of the energy is wasted heat. Harness that and the efficiency rises like hell. |