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Title:The Quenching Method of Determining Boiling Curves on Spheres
Author(s):Hwalek, John Joseph
Department / Program:Chemical Engineering
Discipline:Chemical Engineering
Degree Granting Institution:University of Illinois at Urbana-Champaign
Degree:Ph.D.
Genre:Dissertation
Subject(s):Engineering, Chemical
Abstract:The purpose of this study was to determine the effect of several experimental parameters on the pool boiling curves determined by the quenching method using spheres. The effects of sphere diameter, sphere metal and the test liquid used, were studied. Tests were also carried out to determine whether local angular variations in the boiling curve exist on a sphere.
A total of 23 spheres ranging in diameter from 0.635 to 10.16 cm. and made of five metals (aluminum, bismuth, copper, lead an zinc) were quenched in three test liquids (nitrogen, Freon-12 and Freon-22). The temperature versus time history at a point inside the sphere was recorded with a thermocouple connected to a digital data acquisition system. Boiling curves were calculated from the temperature versus time data using a finite element inverse heat conduction program developed by the author.
Effects of the sphere diameter and the thermal properties on the quench boiling curves were found. Local variations in the boiling curve near the maximum heat flux were measured. No deviation from quasi-steady state boiling due to a too fast cooling rate could be detected.
Issue Date:1982
Type:Text
Description:325 p.
Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 1982.
URI:http://hdl.handle.net/2142/69728
Other Identifier(s):(UMI)AAI8302892
Date Available in IDEALS:2014-12-15
Date Deposited:1982


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