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RESEARCH PAPERS

Thermal Conductivity of Gaseous and Liquid Ammonia

[+] Author and Article Information
A. A. Clifford, R. Tufeu

Laboratoire des Interactions Moléculaire et des Hautes Pressions, C.N.R.S., Université Paris Nord, 93430, Villetaneuse, France

J. Heat Transfer 110(4a), 992-995 (Nov 01, 1988) (4 pages) doi:10.1115/1.3250604 History: Received April 03, 1987; Online October 20, 2009

Abstract

The thermal conductivity of gaseous and liquid ammonia has been measured in the range 300–300 K and at pressures up to 50 MPa. The measurements were a necessary preliminary to a fitting of the thermal conductivity surface in the density–temperature plane, which is part of the current program of the Transport Properties Subcommittee of the I.U.P.A.C. Results were obtained that are believed to be accurate to 2 percent. It is difficult to make a good comparison of these results with previous data until a full correlation of the thermal conductivity of ammonia is carried out. A preliminary assessment for the liquid phase indicates that agreement is reasonable over much of the range with differences up to around 5 percent under certain conditions. For the gas phase an approximate extrapolation to atmospheric pressure can be made and the results compared with some recent recommended values. Differences of ±3 percent are observed.

Copyright © 1988 by ASME
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