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Title: Heat Transfer from Glass Melt to Cold Cap: Effect of Heating Rate

Abstract

The feed-to-glass conversion occurs in the cold cap floating on the melt pool in the nuclear waste glass melter. The conversion rate (the melting rate, or the glass production rate) is controlled by the heat flux delivered to the cold cap from molten glass. In an attempt to analyze the intricate relationship between rate of heating, the feed foaming response, and the rate of melting, we experimentally investigated the change in feed volume at different heating rates by using several melter feeds known to exhibit a wide range of melting rates under identical melter operating conditions. As expected, the maximum foam porosity increased as the heating rate increased but, surprisingly, the temperature at which foam reached maximum volume either decreased or increased with the heating rate depending on the feed. The cold cap bottom temperature, a critical factor for the heat flow to the cold cap, and thus the rate of melting, is hypothesized to be roughly equal to the maximum foam temperature measured by the feed volume expansion test.

Authors:
ORCiD logo [1];  [2];  [3];  [1];  [4];  [1];  [5]
  1. BATTELLE (PACIFIC NW LAB)
  2. EMERITUS PROGRAM
  3. Institute of Chemical Technology in Prague
  4. Institute of Chemical Technology
  5. OFFICE RIVER PROTECTION
Publication Date:
Research Org.:
Pacific Northwest National Lab. (PNNL), Richland, WA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1544784
Report Number(s):
PNNL-SA-133203
DOE Contract Number:  
AC05-76RL01830
Resource Type:
Journal Article
Journal Name:
International Journal of Applied Glass Science
Additional Journal Information:
Journal Volume: 10; Journal Issue: 3
Country of Publication:
United States
Language:
English

Citation Formats

Lee, Seung Min, Hrma, Pavel R., Pokorny, Richard, Traverso, Joseph J., Klouzek, Jaroslav, Schweiger, Michael J., and Kruger, Albert A. Heat Transfer from Glass Melt to Cold Cap: Effect of Heating Rate. United States: N. p., 2019. Web. doi:10.1111/ijag.13104.
Lee, Seung Min, Hrma, Pavel R., Pokorny, Richard, Traverso, Joseph J., Klouzek, Jaroslav, Schweiger, Michael J., & Kruger, Albert A. Heat Transfer from Glass Melt to Cold Cap: Effect of Heating Rate. United States. doi:10.1111/ijag.13104.
Lee, Seung Min, Hrma, Pavel R., Pokorny, Richard, Traverso, Joseph J., Klouzek, Jaroslav, Schweiger, Michael J., and Kruger, Albert A. Mon . "Heat Transfer from Glass Melt to Cold Cap: Effect of Heating Rate". United States. doi:10.1111/ijag.13104.
@article{osti_1544784,
title = {Heat Transfer from Glass Melt to Cold Cap: Effect of Heating Rate},
author = {Lee, Seung Min and Hrma, Pavel R. and Pokorny, Richard and Traverso, Joseph J. and Klouzek, Jaroslav and Schweiger, Michael J. and Kruger, Albert A.},
abstractNote = {The feed-to-glass conversion occurs in the cold cap floating on the melt pool in the nuclear waste glass melter. The conversion rate (the melting rate, or the glass production rate) is controlled by the heat flux delivered to the cold cap from molten glass. In an attempt to analyze the intricate relationship between rate of heating, the feed foaming response, and the rate of melting, we experimentally investigated the change in feed volume at different heating rates by using several melter feeds known to exhibit a wide range of melting rates under identical melter operating conditions. As expected, the maximum foam porosity increased as the heating rate increased but, surprisingly, the temperature at which foam reached maximum volume either decreased or increased with the heating rate depending on the feed. The cold cap bottom temperature, a critical factor for the heat flow to the cold cap, and thus the rate of melting, is hypothesized to be roughly equal to the maximum foam temperature measured by the feed volume expansion test.},
doi = {10.1111/ijag.13104},
journal = {International Journal of Applied Glass Science},
number = 3,
volume = 10,
place = {United States},
year = {2019},
month = {7}
}

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