Applicability of the Graetz's solution for Newtonian fluids to the calculations of the heat transfer in coal-water fuel at the pre-heating stage. (1st March 2021)

• Record Type: Journal Article
• Authors: Pinchuk, Valeriya; Moumane, Mohammed; Sharabura, Tatiana; Shishko, Yulia; Kuzmin, Andrey
• Is Part Of: Thermal science and engineering progress. Volume 21(2021)
• Publication Date: 2021-03-01
• Subjects: Coal-water fuel -- Heat transfer -- Non-Newtonian fluid -- Graetz problem -- Forced convection; Heat engineering -- Periodicals; Heat engineering; Thermodynamics; Periodicals; 621.402
• DOI: 10.1016/j.tsep.2020.100798
• Languages: English
• ISSNs: 2451-9049

Abstract

Highlights: pre-heating allows activating the coal-water fuel before using. heat transfer related solution for Newtonian fluids is not applicable for coal-water fuel. empirical equation of simple form is provided as the result of the experimental research. Abstract: The usage of coal-water fuel requires some preparations and activation of the fuel before combustion. One of the preparation stages is coal-water fuel's thermal activation which improves the burning processes of such a fuel. This manuscript considers specifics of the coal-water fuel pre-heating in the feeding pipe. The results show that the widely used Graetz's solution for Newtonian fluids cannot be used for calculation of the heat-transfer parameters in the case of coal-water fuel. An empirical equation was obtained for use in practical applications.