It requires 1 btu (British thermal unit) to raise or lower 1 lb of pure water 1°F at sea level. That is called sensible heat.
It requires 144 btu to change the state of 1 lb of 32°F liquid pure water to 32°F solid ice at sea level. That is called latent heat of fusion.
To change the temperature of 1 lb of 212°F water to 32°F water requires the extraction of 180 btu. To change the state of that 1 lb 32°F water to 32°F ice requires a further extraction of 144 btu.
So you're simply talking about the extraction rate of btu (heat) from the water. The greater the temperature difference the faster the transfer rate.
Let's say you have #1 liquid at 200°F and #2 liquid at 100°F. After 10 minutes the 200°F #1 liquid cools to 100°F (-100 btu) while the 100°F #2 liquid only cools to 60°F (-40 btu).
Now #1 is 100°F and has the same transfer rate as #2 did (-40 btu) over the next 10 minutes while heat continues to be extracted from #2. So you can see that #1 can never catch up with #2.
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.
