The Thermal Conductivity and Diffusivity of Concrete (Classic Reprint)
Language: English
Published by Forgotten Books, 2018
- Hardcover
- New
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AbeBooks seller since June 11, 1999
Condition: New
£ 27.36
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Seller Inventory # LX-9780265630976
- Title
- The Thermal Conductivity and Diffusivity of Concrete (Classic Reprint)
- Author
- A. P. Carman
- Publisher
- Forgotten Books
- Publication year
- 2018
- Condition
- New
- Binding
- HRD
- Language
- English
- ISBN 10
- 0265630975
- ISBN 13
- 9780265630976
- Item weight
- 275 grams
The conversion bf results given in either of the above units into other units is a matter of Simple calculation.
Upon this subject of units of thermal conductivity the following quotation is made from the excellent text-book of Ingersoll and Zoebel entitled The Mathematical Theory of Heat Conduction There is probably no subject in which the confusion of units is greater than that of heat conduction. While the physicist uses the metric or c.g.s. Unit - that is, the gram-calorie per second, per square centimeter of area, for a temperature gradient of a degree centigrade per centimeter - there is no such uniformity Of practice among engineers. The steam engineer refers his observations to the B.t.u. Per hour, per square foot, per degree Fahrenheit, per inch in thickness, while the refrig crating engineer prefers the day as the unit of time rather than the hour, and the electrical engineer uses various systems, based frs quently on the kilowatt, as representing the rate of heat flow. There are also numbers of other units, some of them making use of the idea Of thermal resistance, analogous to electrical resistance, and therefore being reciprocally related to conductivity. These various engineering units have been introduced to simplify the computation of heat losses in various types of problems, and on these grounds perhaps justify their existence; but from the standpoint of the present work they are, with one or two exceptions, not usable. This is because, in a large majority of the cases we shall have occasion to consider, it is not the conductivity but the diffusivity, or thermometric conductivity, which enters directly into the computations, and this latter is too complex a unit to use profitably with a mixture of English and metric systems, or an English system involving two different units of length - for example, feet and inches, as in common engineering practice. Only two, then, of the many heat-conduction units lend themselves readily to our purpose - the B.t.u. Per hour, per square foot, for a temperature gradient of a degree Fahrenheit per foot, and the metric unit. But the former is practically never used (the gradient being expressed in degrees per inch in the common engineering unit), while the latter is becoming-of more general use every day, so we shall confine our units and calculations to the metric system, giving in many cases, however, the English equivalents.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works.
"Synopsis" may belong to another edition of this title.
PBShop.store UK
Fairford, GLOS, United Kingdom
AbeBooks seller since June 11, 1999
Shipping rates from United Kingdom to U.S.A.
| Item | 10 to 20 business days | 10 to 20 business days |
|---|---|---|
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