Heat transfer from glass melt to cold cap: Effect of heating rate

0516608 - ÚSMH 2020 RIV US eng J - Článek v odborném periodiku
Lee, S.M. - Hrma, P. - Pokorný, R. - Traverso, J.J. - Kloužek, Jaroslav - Schweiger, M. J. - Kruger, A.A.
Heat transfer from glass melt to cold cap: Effect of heating rate.
International Journal of Applied Glass Science. Roč. 10, č. 3 (2019), s. 401-413. ISSN 2041-1286. E-ISSN 2041-1294
Institucionální podpora: RVO:67985891
Klíčová slova: feed-to-glass conversion * foaming * heat flux * melting rate
Obor OECD: Ceramics
Impakt faktor: 1.917, rok: 2019
Způsob publikování: Omezený přístup
https://ceramics.onlinelibrary.wiley.com/doi/abs/10.1111/ijag.13104

Conversion of feed to glass occurs in the cold cap that floats on the melt pool in a 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 the molten glass. In an attempt to analyze the intricate relationship between the rate of heating, the feed foaming response, and the rate of melting, we measured 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. However, contrary to expectation, the temperature at which the foam reached maximum volume either decreased or increased with the heating rate, depending on the feed composition. A change in maximum foam temperature from the feed volume expansion test indicates a similar change of the cold‐cap bottom temperature, which influences the heat flow to the cold cap, and thus the rate of melting.
Trvalý link: http://hdl.handle.net/11104/0302384