A New Model for the Effect of Calcium Sulfate Scale Formation on Pool Boiling Heat Transfer

[+] Author and Article Information
M. Jamialahmadi

The University of Petroleum Industry, Ahwaz, Iran

H. Müller-Steinhagen

Institute for Thermodynamics and Thermal Engineering, University of Stuttgart, Institute of Technical Thermodynamics, German Aerospace Centre (DLR), Germany

J. Heat Transfer 126(4), 507-517 (Apr 30, 2004) (11 pages) doi:10.1115/1.1777579 History: Received October 31, 2003; Revised April 30, 2004
Copyright © 2004 by ASME
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Heat transfer coefficients for pool boiling of water and calcium sulfate solutions
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Effect of calcium sulfate concentration on the boiling point elevation of solution
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Appearance of heating element during a fouling run at 38,522 W/m2
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Active nucleation site density as a function of time
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Comparison of the rate constant of calcium sulfate deposition suggested by various investigator
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Deposits observed at different heat fluxes (width=0.32 mm): (a) q=28,892 W/m2; (b) q=120,482 W/m2; and (c) q=301,205 W/m2
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Variation of the thermal conductitity and density of the deposit with heat flux
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Boiling from porous deposit according to McBeth 33
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Comparison of bubble departure diameter and nucleation site density during boiling of a calcium sulfate solution with those in distilled water
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(a–g) Heat transfer coefficient as a function of time for various heat fluxes
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Schematic diagram of the test heater
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The ratio of concentration and temperature of solution at interface and bulk as a function of heat flux
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Close up of picture of the mouth of a steam chimney with about 0.005 mm diameter 33




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