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#16
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I am still shocked that it can be pondered whether antifreeze helps the engine warm itself up.
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83 300TD (need rear wiper assembly dead or alive) 84 300SD Daily driver 85 300TD almost 400k miles and driven daily. 98 E300D *sold 86 300SDL *sold and made flawless 10 hour journey to new home. |
#17
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FYI
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ASE Master Mechanic asemastermechanic@juno.com Prototype R&D/testing: Thermal & Aerodynamic System Engineering (TASE) Senior vehicle instrumentation technician. Noise Vibration and Harshness (NVH). Dynamometer. Heat exchanger durability. HV-A/C Climate Control. Vehicle build. Fleet Durability Technical Quality Auditor. Automotive Technical Writer 1985 300SD 1983 300D 1984 190D 2003 Volvo V70 2002 Honda Civic https://www.boldegoist.com/ |
#18
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@JEBalles,
I disagree. Not to get into an argument but you may want to look that one up. I am a Power Engineer specializing in water treatment.
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I don't know the same things that you don't know. Shayne 85 W126 SD OM617.951 87 409D 650S OM617.913 93 E34 Touring M50B25TU 02 E46 Sport M54B30TU |
#19
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Quote:
Nope. Surfactant = surface active agent; any compound that has greater activity at the surface, whether "impurity" or "intentional". The test is simple. Take a sample of water. Put it in a sealed bottle. Shake it. Do you see any bubbles/foam that persists once you stop agitating? If so a surfactant is present. Last edited by sjh; 02-11-2011 at 12:22 PM. |
#20
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I ain't calling anybody out here, but I don't understand how distilled water could have no surface tension. You saying a water skipper would drown in it?
I use bottled distilled water in my espresso pot, so just to see, I poured some into a clean glass and put a staple in. It floats on the surface tension just fine. I poke it with a fork, it sinks to the bottom. So ... what gives?
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Finn John -- Albany, Ore. www.offbeatoregon.com 76 Merc 300D, sky-blue, *86k, for driving 84 Jaguar XJ6, black, 245k, for restoring someday 71 Merc 408, 2.3 petrol 4, Avon caravan conversion (UK), RHD |
#21
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Quote:
The prior remark was that contaminants could not influence surface tension. That is incorrect; they may or may not, depending on whether they are present at the interface in sufficient quantity and if the balance of inter- to intra- molecular forces is altered. The original question, as I heard it, was: Given two identical cars, one filled with water, one with a 50-50 antifreeze, which warms up quickest. I replied the mixture has a lower heat-carrying capacity. Someone else replied that the efficiency of the heat transfer will probably be improved because of additives. I'm comfortable with both comments. Someone else said the comment about contaminants and surface tension. I did not agree with that comment. Anyway --> Use a good 50-50 mixture and take good care of your car seems to be something we can all agree on! Last edited by sjh; 02-11-2011 at 08:27 PM. |
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