[TR] Water pumps.

Michael Marr mmarr at albiontechnical.com
Thu May 11 13:56:20 MDT 2017


Your pumpless system is known as a thermo-syphon system.  My 1948 flathead Morris Minor was equipped with just such a system.  Never overheated in all the time I owned it.

And indeed, the heat transfer function represents the capacity of the system.  The rate of heat transfer depends upon the mass flows and relative temperatures of the fluids on either side of the HX.  Remember the second law, too…

https://www.youtube.com/watch?v=VnbiVw_1FNs

Mike

From: Triumphs [mailto:triumphs-bounces at autox.team.net] On Behalf Of ptegler at verizon.net
Sent: Thursday, May 11, 2017 12:44 PM
To: fishplate at gmail.com; triumphs at autox.team.net
Subject: Re: [TR] Water pumps.

well put.
If the term 'book smart' offended anyone.... please excuse me...
perhaps the terminology has changed over the years.... was simply a reference to 'stats' and or 'equations' used for debate....

As in nature...if TIME had nothing to do with all this, just as in the oceans of the world, you would not need a water pump at all to circulate water.  The engine 'warmed' water would rise to the top. ...would be replaced by water from the bottom of the cooler radiator, creating space for the warm water to rise to/escape to...cycle repeats... (regardless of where you want to start the loop  heat/cold  cold/heat).  So 'flow control' IS relative.  In Reality.... clogs DO reduce cooling.  RATE (by equations) has no effect on BTU of the exchanger.

Your description of the heat transfer function is/was a definition of execution 'capability' of the device . BTU is not a measure of work, simply of energy. A relational definition.  My flow comment was one of scale/size requirement to perform work in a reasonable amount of time. We were apparently referencing different faces of the same function.

v/r
ptegler at verizon.net<mailto:ptegler at verizon.net>


-----Original Message-----
From: Jeff Scarbrough <fishplate at gmail.com>
To: Triumphs (triumphs at autox.team.net) <triumphs at autox.team.net>
Sent: Thu, May 11, 2017 12:55 pm
Subject: Re: [TR] Water pumps.

On Thu, May 11, 2017 at 8:49 AM, Dave <dave1massey at cs.com<mailto:dave1massey at cs.com>> wrote:
> Do not conflate delta T and heat flow.

Dave makes a good point. And I made a classic error - I failed to
state my assumptions. Mea culpa...

It's got me curious now, though...if I had any spare time, it would be
interesting to model heat transfer in a Triumph system sand see where
the bottlenecks are. (My money is on plugged radiators).

Jeff Scarbrough
Corrosion Acres, Ga.

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