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Re: [EVDL] Magnetic Shock Absorber & EV

Well...I suppose if you had the space used for the class 8 truck assembly
shown here:

you could get about 70amps...and ditch your alternator once your exhaust is
warmed up.

:) Looks like you are right...the best bet is to stick with an alternator
unless minor parasitic charging is good enough. :)

--Randall (rank amateur and knucklehead)
Charlotte, NC

----- Original Message -----
From: "Cor van de Water" <[email protected]>
To: "Electric Vehicle Discussion List" <[email protected]>
Sent: Monday, October 08, 2007 10:54 PM
Subject: Re: [EVDL] Magnetic Shock Absorber & EV

> Peltier devices use effect nr 2, in that it acts as a heat pump.
> Send a current through a Peltier and it will start pumping
> heat from one side to the other. Reverse the current and the
> hot and cold side reverse as well.
> That effect is used in portable coolers, where you can keep
> cans (relatively) cool while plugged into your car 12V outlet
> and you can even switch it to heating, which usually has a
> poor effect, but nevertheless these are amazing devices
> with efficiency well above 100%.
> Before you go off on a rant about preservation of energy,
> with efficiency, I mean that the output of heat is larger
> than the amount of energy put in the device, because of
> the pumping action. If the difference in temp between the
> two sides is not too great, this device can easily deliver
> 50W of heat while only consuming 10W of electricity, by
> pumping 40W of heat from ambient.
> To generate electricity with them is possible, but very
> inefficient, due to the large losses in heating and
> cooling the two sides.
> If you already have a large heat generator and plenty of
> cool ambient, like in a driving ICE car, then you can
> create some electricity the way you described, but
> running an alternator is much cheaper and more efficient.
> One place where I have seen the Peltier find some kind of
> interesting application is a gas-powered night lamp, where
> the excess heat creates a little electricity to power a
> radio.
> Regards,
> Cor van de Water
> Systems Architect
> Proxim Wireless Corporation
> Email: [email protected] Private:
> Skype: cor_van_de_water IM: [email protected]
> Tel: +1 408 542 5225 VoIP: +31 20 3987567 FWD# 25925
> Fax: +1 408 731 3675 eFAX: +31-87-784-1130
> Second Life:
> -----Original Message-----
> From: [email protected] [mailto:[email protected]] On
> Behalf Of Jeff Shanab
> Sent: Monday, October 08, 2007 7:36 PM
> To: [email protected]
> Subject: Re: [EVDL] Magnetic Shock Absorber & EV
> Danny said "Peltiers are thermocouples."
> Here is a clarification from
> Effect 1 is what I was refering to as thermocouple. The idea I had was to
> take strips of iron and copper and create a long accorian folded isolated
> thermopile that mounted on the exhaust manifold. Wide strips for current
> electrically in series for a higher voltage.
> Effect # 3 is what I refer to as a peltier, in that it takes 2
> complimentary junctions of special materials.
> International Thermoelectric Society.
> Whilst it is generally accepted that there are only three thermoelectric
> effects, it is in fact possible to describe four.
> The four thermoelectric effects, listed in chronological order of their
> discovery, are:
> Effect 1 - If two different conductors are joined and the two junctions
> are maintained at different temperatures, an electromotive force is
> developed in the circuit.
> Effect 2 - If a current flows in a circuit consisting of two different
> conductors then one of the junctions is heated and the other is cooled.
> Effect 3 - When a temperature difference exists between two points in a
> single electrical conductor an electrical potential is established between
> the points.
> Effect 4 - If a current passes through a conductor in which a temperature
> gradient exists, this current causes a flow of heat from one part to the
> other.
> These effects are very closely related. Indeed, each of them represents a
> reversible effect whereby effects 1 and 2 are the reverse of each other,
> and effects 3 and 4 are similarly the reverse of each other.
> Thomas Johann Seebeck first identified Effect 1 in 1821. He spent the rest
> of his scientific career measuring the size of this effect for different
> pairs of dissimilar conductors in contact with each other.
> Seebeck died in 1831.
> In 1834 Jean Charles Athanase Peltier first identified Effect 2, the
> reverse of Effect 1. Peltier died in 1845.
> Significantly later (around 1854-1855), William Thomson first deduced and
> demonstrated BOTH of the effects numbered 3 and 4.
> Starling and Woodall partly describe Thomson's contribution thus (from
> "Physics", Longmans, 1950):
> <snip>
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