Posted by *AC Me* on June 11, 2008, 2:22 pm

Hi guys.

I would like to be able to calculate the effect of fluid velocity on

heat exchange. For instance, if the temperature on one side of a heat

exchanger is a constant 160 Farenheit and that on the other side is a

constant 70 Farenheit then it is fairly easy to calculate the heat

transferred through the walls of the heat exchanger assuming zero

fluid velocity and an infinite volume on the side with the lower

temperature. However if the fluid on the side with the lower

temperature is moving then the heat transferred from the source

(higher temp side) to the destination (lower temp. side) increases.

I cannot remember what formulae are used for this.

I cannot find my old thermodynamic text books.

I have not been able to locate anything suitable on the web, although

I may not be using the correct search phrases.

Can anyone point me in the right direction?

I'd appreciate any help you might be able to give.

Take care.

Mike

Posted by *Morris Dovey* on June 11, 2008, 2:42 pm

AC Me wrote:

*> Hi guys.*

*> *

*> I would like to be able to calculate the effect of fluid velocity on*

*> heat exchange. For instance, if the temperature on one side of a heat*

*> exchanger is a constant 160 Farenheit and that on the other side is a*

*> constant 70 Farenheit then it is fairly easy to calculate the heat*

*> transferred through the walls of the heat exchanger assuming zero*

*> fluid velocity and an infinite volume on the side with the lower*

*> temperature. However if the fluid on the side with the lower*

*> temperature is moving then the heat transferred from the source*

*> (higher temp side) to the destination (lower temp. side) increases.*

*> I cannot remember what formulae are used for this.*

*> I cannot find my old thermodynamic text books.*

*> I have not been able to locate anything suitable on the web, although*

*> I may not be using the correct search phrases.*

*> *

*> Can anyone point me in the right direction?*

*> *

*> I'd appreciate any help you might be able to give.*

*> *

*> Take care.*

*> *

*> Mike*

Mike...

Try DAGS "heat transfer"+"fluid flow"+formula -abstract

You're likely to find more than you ever wanted. :-)

--

Morris Dovey

DeSoto Solar

DeSoto, Iowa USA

http://www.iedu.com/DeSoto/

Posted by *AC Me* on June 12, 2008, 8:32 pm

*> AC Me wrote:*

*> > Hi guys.*

*> > I would like to be able to calculate the effect of fluid velocity on*

*> > heat exchange. For instance, if the temperature on one side of a heat*

*> > exchanger is a constant 160 Farenheit and that on the other side is a*

*> > constant 70 Farenheit then it is fairly easy to calculate the heat*

*> > transferred through the walls of the heat exchanger assuming zero*

*> > fluid velocity and an infinite volume on the side with the lower*

*> > temperature. However if the fluid on the side with the lower*

*> > temperature is moving then the heat transferred from the source*

*> > (higher temp side) to the destination (lower temp. side) increases.*

*> > I cannot remember what formulae are used for this.*

*> > I cannot find my old thermodynamic text books.*

*> > I have not been able to locate anything suitable on the web, although*

*> > I may not be using the correct search phrases.*

*> > Can anyone point me in the right direction?*

*> > I'd appreciate any help you might be able to give.*

*> > Take care.*

*> > Mike*

*> Mike...*

*> Try DAGS "heat transfer"+"fluid flow"+formula -abstract*

*> You're likely to find more than you ever wanted. :-)*

*> --*

*> Morris Dovey*

*> DeSoto Solar*

*> DeSoto, Iowa USAhttp://www.iedu.com/DeSoto/- Hide quoted text -*

*> - Show quoted text -*

Thanks Morris.

You're not wrong. There's more there than I hope I'll need.

Take care.

Mike

Posted by *J. Clarke* on June 13, 2008, 11:04 am

AC Me wrote:

*>> AC Me wrote:*

*>>> Hi guys.*

*>>*

*>>> I would like to be able to calculate the effect of fluid velocity *

*>>> on*

*>>> heat exchange. For instance, if the temperature on one side of a*

*>>> heat exchanger is a constant 160 Farenheit and that on the other*

*>>> side is a constant 70 Farenheit then it is fairly easy to *

*>>> calculate*

*>>> the heat transferred through the walls of the heat exchanger*

*>>> assuming zero fluid velocity and an infinite volume on the side*

*>>> with the lower temperature. However if the fluid on the side with*

*>>> the lower temperature is moving then the heat transferred from the*

*>>> source (higher temp side) to the destination (lower temp. side)*

*>>> increases. I cannot remember what formulae are used for this.*

*>>> I cannot find my old thermodynamic text books.*

*>>> I have not been able to locate anything suitable on the web,*

*>>> although I may not be using the correct search phrases.*

*>>*

*>>> Can anyone point me in the right direction?*

*>>*

*>>> I'd appreciate any help you might be able to give.*

*>>*

*>>> Take care.*

*>>*

*>>> Mike*

*>>*

*>> Mike...*

*>>*

*>> Try DAGS "heat transfer"+"fluid flow"+formula -abstract*

*>>*

*>> You're likely to find more than you ever wanted. :-)*

*>>*

*>> --*

*>> Morris Dovey*

*>> DeSoto Solar*

*>> DeSoto, Iowa USAhttp://www.iedu.com/DeSoto/- Hide quoted text -*

*>>*

*>> - Show quoted text -*

*> Thanks Morris.*

*> You're not wrong. There's more there than I hope I'll need.*

FWIW, Amazon has used copies of "Principles of Heat Transfer" for

under a buck plus shipping.

--

--

--John

to email, dial "usenet" and validate

(was jclarke at eye bee em dot net)

Posted by *AC Me* on June 16, 2008, 10:46 pm

*> AC Me wrote:*

*> >> AC Me wrote:*

*> >>> Hi guys.*

*> >>> I would like to be able to calculate the effect of fluid velocity*

*> >>> on*

*> >>> heat exchange. For instance, if the temperature on one side of a*

*> >>> heat exchanger is a constant 160 Farenheit and that on the other*

*> >>> side is a constant 70 Farenheit then it is fairly easy to*

*> >>> calculate*

*> >>> the heat transferred through the walls of the heat exchanger*

*> >>> assuming zero fluid velocity and an infinite volume on the side*

*> >>> with the lower temperature. However if the fluid on the side with*

*> >>> the lower temperature is moving then the heat transferred from the*

*> >>> source (higher temp side) to the destination (lower temp. side)*

*> >>> increases. I cannot remember what formulae are used for this.*

*> >>> I cannot find my old thermodynamic text books.*

*> >>> I have not been able to locate anything suitable on the web,*

*> >>> although I may not be using the correct search phrases.*

*> >>> Can anyone point me in the right direction?*

*> >>> I'd appreciate any help you might be able to give.*

*> >>> Take care.*

*> >>> Mike*

*> >> Mike...*

*> >> Try DAGS "heat transfer"+"fluid flow"+formula -abstract*

*> >> You're likely to find more than you ever wanted. :-)*

*> >> --*

*> >> Morris Dovey*

*> >> DeSoto Solar*

*> >> DeSoto, Iowa USAhttp://www.iedu.com/DeSoto/-Hide quoted text -*

*> >> - Show quoted text -*

*> > Thanks Morris.*

*> > You're not wrong. There's more there than I hope I'll need.*

*> FWIW, Amazon has used copies of "Principles of Heat Transfer" for*

*> under a buck plus shipping.*

*> --*

*> --*

*> --John*

*> to email, dial "usenet" and validate*

*> (was jclarke at eye bee em dot net)- Hide quoted text -*

*> - Show quoted text -*

Ordered.

Thanks John.

Mike

> Hi guys.>> I would like to be able to calculate the effect of fluid velocity on> heat exchange. For instance, if the temperature on one side of a heat> exchanger is a constant 160 Farenheit and that on the other side is a> constant 70 Farenheit then it is fairly easy to calculate the heat> transferred through the walls of the heat exchanger assuming zero> fluid velocity and an infinite volume on the side with the lower> temperature. However if the fluid on the side with the lower> temperature is moving then the heat transferred from the source> (higher temp side) to the destination (lower temp. side) increases.> I cannot remember what formulae are used for this.> I cannot find my old thermodynamic text books.> I have not been able to locate anything suitable on the web, although> I may not be using the correct search phrases.>> Can anyone point me in the right direction?>> I'd appreciate any help you might be able to give.>> Take care.>> Mike