<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div><span></span></div><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div><span></span></div><div><div><span></span></div><div><meta http-equiv="content-type" content="text/html; charset=utf-8"><div>Cliff,</div><div id="AppleMailSignature">Good question. I should add some additional details needed for those inclined to try this to avoid any plenum issues.</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">The design uses the plenum drain system.. Since Standard TR allowed for rainwater to run through the vent and drain the plenum out the provided openings I tried to make sure they worked by vacuuming AND blowing them out as far down as I could and making sure they drained afterwards. My squirts from the wiper fluid tank every so often should be minimal compared to rain as far as rust potential, so I did not do anything additional to the plenum to avoid rust. I do not use the swamp cooler the last couple of miles before stopping. But in any case the plenum should be able to handle the comparitively small amount of water being used in the swamp cooler. The goal is to evaporate the water to get the cooling effect so it's more a wetting process of the filter material than a steady flow of water.</div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">I do try to use distilled water. </div><div id="AppleMailSignature"><br></div><div id="AppleMailSignature">Bud</div><div id="AppleMailSignature"><br>Sent from my Commodore 64</div><div><br>On May 11, 2017, at 4:20 PM, Cliff Hansen <<a href="mailto:cliff_hansen@outlook.com">cliff_hansen@outlook.com</a>> wrote:<br><br></div><blockquote type="cite"><div>
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<p class="MsoNormal">Bud,</p>
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<p class="MsoNormal">Cool swamp cooler <insert groan here>. Did you do anything particular to rust proof the plenum? Seems to me that the cooler would drip into that area, unless I misunderstand your design.</p>
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<p class="MsoNormal">Cliff</p>
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<p class="MsoNormal">Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">
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<p class="MsoNormal" style="border:none;padding:0in"><b>From: </b><a href="mailto:levilevi@comcast.net">Bud R</a><br>
<b>Sent: </b>Thursday, May 11, 2017 1:19 PM<br>
<b>To: </b><a href="mailto:mmarr@albiontechnical.com">Michael Marr</a><br>
<b>Cc: </b><a href="mailto:triumphs@autox.team.net">Triumphs</a>; <a href="mailto:TR3driver@ca.rr.com">
Randall</a><br>
<b>Subject: </b>Re: [TR] Water pumps.</p>
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<p class="MsoNormal"><span style="color:#1F497D">and those of you that live in dry climes may have an evaporative cooler on your roof, more commonly known as a swamp cooler.</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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<p class="MsoNormal">And some of us have a swamp cooler on their TR6. ;) Pics below. <o:p></o:p></p>
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<p class="MsoNormal">It uses the wiper fluid tank and pump, some aquarium plastic tubing, some filter material, some harbor freight magnets and a hobby shop 1/8” brass pipe (to fit the tubing) with tiny little holes drilled into it and plugged on one end. Cool
air comes out all the traditional outlets in and under the dash. <o:p></o:p></p>
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<p class="MsoNormal">You do need a vent lid (69-72 TR6) not a vent grille (73-76) for this particular design to work. The vent lid still closes and opens with the Swamp Cooler attached and the whole thing is 99% reversible.<o:p></o:p></p>
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<p class="MsoNormal">Works great west of North Platte (100th meridian), works OK further East (more humidity), but better than nothing and certainly better than the firewall radiating heat into the tub.<o:p></o:p></p>
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<p class="MsoNormal">My LMTD goes with the flow.<o:p></o:p></p>
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<p class="MsoNormal">Bud Rolofson<br>
<br>
Extreme Parts Racing (more than just a haircut)<br>
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71TR6 CC57365 (Good 6)<br>
71 Spitfire MK IV Race Car #3<br>
69 Spitfire MK III (back up FE engine/dinghy car)<br>
93 Minnie Winnie Race Support Vehicle <br>
77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)<o:p></o:p></p>
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<p class="MsoNormal">On May 11, 2017, at 8:00 AM, Michael Marr <<a href="mailto:mmarr@albiontechnical.com">mmarr@albiontechnical.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal"><span style="color:#1F497D">Without getting into the esoterica of heat exchange, what Randall has described is accounted for by a concept known as the logarithmic mean temperature differential (LMTD) across a heat exchanger. There is a
quite good article on Wikipedia that explains this. In my earlier note, when I pointed out that Q (heat transferred) is equal to U x deltaT, the delta T for a heat exchanger is in fact the LMTD.</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F497D"><a href="https://en.wikipedia.org/wiki/Logarithmic_mean_temperature_difference"><span style="color:purple">https://en.wikipedia.org/wiki/Logarithmic_mean_temperature_difference</span></a></span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F497D">As an aside, we owners of TRs often retrofit the cars with electric radiator fans so that we can increase airflow over the radiator at idle and at low vehicle speeds. We do this to increase the mass flow of
the air across the radiator, so that the radiator’s capacity to transfer a fixed maximum quantity of heat is fully utilized. What we do not do is slow the fan down to give the air more time to linger!</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F497D">Another way of improving the performance of a radiator at low speeds would be to spray water on the radiator and use the latent heat of evaporation of the water to improve LMTD. This approach is used in evaporative
condensers in the refrigeration industry, and those of you that live in dry climes may have an evaporative cooler on your roof, more commonly known as a swamp cooler.</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:#1F497D">Mike</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">From:</span></b><span class="apple-converted-space"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif"> </span></span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif">Triumphs
[<a href="mailto:triumphs-bounces@autox.team.net"><span style="color:purple">mailto:triumphs-bounces@autox.team.net</span></a>]<span class="apple-converted-space"> </span><b>On Behalf Of<span class="apple-converted-space"> </span></b>Randall<br>
<b>Sent:</b><span class="apple-converted-space"> </span>Wednesday, May 10, 2017 11:53 PM<br>
<b>Cc:</b><span class="apple-converted-space"> </span>'Triumphs'<br>
<b>Subject:</b><span class="apple-converted-space"> </span>Re: [TR] Water pumps.</span><span style="font-size:12.0pt;font-family:"Times New Roman",serif"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">> The<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">> flow rate of the fluid through the heat exchanger does not affect how much<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">> heat is transferred.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Courier New"">I disagree. As the fluid cools during it's trip through the exchanger, the delta-T across the exchanger drops, causing less heat to be transferred. So the slower the flow, the more
delta-T drops and less heat is transferred. In the extreme case of no flow at all, the fluid temperature drops until delta-T is zero and no further heat is transferred. If this were not true, the thermostat could not regulate engine temperature.<o:p></o:p></span></p>
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**<span class="apple-converted-space"> </span><a href="mailto:triumphs@autox.team.net"><span style="color:purple">triumphs@autox.team.net</span></a><span class="apple-converted-space"> </span>**<br>
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