[Diy_efi] LPG injection

Lachlan Chapman chapmans at ihug.co.nz
Fri Nov 22 02:46:19 GMT 2002


Replys spread thru below:

Bear in mind i am a farmer who failed chem and physics, so i am probably
wrong.



----- Original Message -----
From: "Mike" <erazmus at iinet.net.au>
To: <diy_efi at diy-efi.org>
Sent: Friday, November 22, 2002 9:35 AM
Subject: Re: [Diy_efi] LPG injection


> At 10:33 AM 18/11/2002 -0500, you wrote:
>
> Greg, Although I agree with your first 2 comments/observations, there is
> a sheer and blatant error of logic in your last para above !
>
> Whether you draw off liquid from the bottom or gas from the top, the
> tank will reduce its pressure therefore it will get cooler, it doesnt
> turn into an ice ball...

If you draw off gas the change in state from liquid to gas takes place in
the tank.

> To suggest you wouldnt get enough to run the engine if drawing gas from
> the top yet its enough to turn it into an 'ice ball' versus drawing more
> gas (as a liquid) from the bottom is preposterous !
>
> If anything the tank is going to get cooler the more you draw from it
> a the presure will drop - so clearly if you draw less then the engine
> needs by drawing gas from the top instead of liquid from the bottom
> then its shouldnt run colder <sigh>

Its the change in state which is causing the gas to absorb the temperature
As a Liquid you get more "gas" per cubic meter.

>
> rgds
>
> mike
>
>
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