The Numerical Calculation of the Temperature Field of Water-Wall Tube of the Supercritical Boiler under Near-Critical Condition

Abstract:

The spirally water wall are distributed on the plane and divided into seven sections. The mean heat flux of each section is determined using furnace thermal calculation in sections. The value of the pressure and temperature concerning the working medium at inlet and outlet of each tube are established by calculating enthalpy increasing. The vaporizing processes of the working medium in the spiral tube under the three working conditions: 70%BMCR, 65%BMCR and 60%BMCR are analyzed. The state of the working medium and the possibility of the heat transfer deterioration are estimated. More reliable references are provided for the appearance of the heat transfer deterioration.

• Periodical: Advanced Materials Research (Volumes 875-877)
• Pages: 1876-1880
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.875-877.1876
• Online since: February 2014
• Authors: Chun Yan Li
• Keywords: Heat Transfer Crisis, Near Critical, Spiral Water-Wall, Temperature Profile

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