Notes on theory and practice of evaporation

✍ Scribed by Philip B. Sadtler

• Publisher: Elsevier Science
• Year: 1908
• Tongue: English
• Weight: 298 KB
• Volume: 166
• Category: Article
• ISSN: 0016-0032
• DOI: 10.1016/s0016-0032(08)90152-6

✦ Synopsis

Heat Transmission.--Heat transmission is measured by four fundamental factors, namely, temperature, weight, space, and time. To be more specific, the common combination of units, in which we express heat transmission, is British Thermal Units, per square fool, per hour. Therefore, the coefficient of the heat transmission of a medium would be the figure which gives the number of British Thermal Units passing per hour from a warmer to a colder substance through one square foot of the medium for which we desire the coefficient.

It will readily be seen that th e ability of the medium to transmit heat in a greater or less degree is governed by the following factors, namely, nature of the material, thickness of the medium, difference in temperature of the warmer and the colder substance, hence, we have hzk t--t~-_~ m.