The Quenching Method of Determining Boiling Curves on Spheres
Hwalek, John Joseph
This item is only available for download by members of the University of Illinois community. Students, faculty, and staff at the U of I may log in with your NetID and password to view the item. If you are trying to access an Illinois-restricted dissertation or thesis, you can request a copy through your library's Inter-Library Loan office or purchase a copy directly from ProQuest.
Permalink
https://hdl.handle.net/2142/69728
Description
Title
The Quenching Method of Determining Boiling Curves on Spheres
Author(s)
Hwalek, John Joseph
Issue Date
1982
Department of Study
Chemical Engineering
Discipline
Chemical Engineering
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(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.
Use this login method if you
don't
have an
@illinois.edu
email address.
(Oops, I do have one)
IDEALS migrated to a new platform on June 23, 2022. If you created
your account prior to this date, you will have to reset your password
using the forgot-password link below.
