[Diy_efi] LPG injection

[Mike]

Yes true to some degree but the volume of liquid in the tank is
still reducing - therefore there is more gas, so yes there is
still a phase change and the pressure lowers...

Of course it depends on the volume of liquid lpg actually
drawn - its just the way the para was written implied false logic,

rgds

mike


At 03:44 PM 22/11/2002 +1300, you wrote:
>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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