Posted by Deutz Lover on November 25, 2016 at 10:59:38 from (174.218.9.166):
In Reply to: black body radiation posted by Geo-TH,In on November 24, 2016 at 06:28:02:
There is a lot of misunderstanding about black-body radiation.
This is really only effective at much higher temperatures than a tractor engine gets. Black bodies are more effective a heat absorbers than transmitters at normal temperatures. For instance a black painted car will get hotter than a white painted car. Convection fins are a lot better at removing heat than a black body for this purpose. Color does not matter as much on these as surface finish.
A very smooth polished surface is not as good at convection cooling as a rougher surface because air flowing over the fins does not contact the metal because of laminar air flow across polished surfaces. This is the reason intake manifolds are not supposed to be polished compared to the exhaust ports and manifolds on carbureted engines. In this case the purpose is to create turbulence to mix the fuel/air. The fins on air cooled motors should not be smoothly polished so that the heat can be transferred to fresh air at the metal/air interface which is not as efficient when the surface is smoothly polished.
A thin paint (.001") really does not impair heat flow that much.
We sell tractor parts! We have the parts you need to repair your tractor - the right parts. Our low prices and years of research make us your best choice when you need parts. Shop Online Today. [ About Us ]
Today's Featured Article - Listening to Your Tractor - by Curtis Von Fange. Years ago there was a TV show about a talking car. Unless you are from another planet, physically or otherwise, I don’t think our internal combustion buddies will talk and tell us their problems. But, on the other hand, there is a secret language that our mechanical companions readily do speak. It is an interesting form of communication that involves all the senses of the listener. In this series we are going to investigate and learn the basic rudimentary skills of understanding this lingo.
... [Read Article]
Latest Ad:
2022 John Deere 5045E, 4wd, front end loader and 3rd function with grapple. 120 hrs, 55k new, must sell
[More Ads]
All Rights Reserved. Reproduction of any part of this website, including design and content, without written permission is strictly prohibited. Trade Marks and Trade Names contained and used in this Website are those of others, and are used in this Website in a descriptive sense to refer to the products of others. Use of this Web site constitutes acceptance of our User Agreement and Privacy Policy
TRADEMARK DISCLAIMER: Tradenames and Trademarks referred to within Yesterday's Tractor Co. products and within the Yesterday's Tractor Co. websites are the property of their respective trademark holders. None of these trademark holders are affiliated with Yesterday's Tractor Co., our products, or our website nor are we sponsored by them. John Deere and its logos are the registered trademarks of the John Deere Corporation. Agco, Agco Allis, White, Massey Ferguson and their logos are the registered trademarks of AGCO Corporation. Case, Case-IH, Farmall, International Harvester, New Holland and their logos are registered trademarks of CNH Global N.V.
