The use of a solution of the inverse heat conduction problem to monitor thermal stresses

• Main Authors: Taler, Jan, Dzierwa, Piotr, Jaremkiewicz, Magdalena, Taler, Dawid, Kaczmarski, Karol, Trojan, Marcin
• Format: Conference Proceeding
• Language: English
• Subjects: Conduction; Conduction heating; Conductive heat transfer; Cooling rate; Electric power generation; Finite element method; Heat; Heat transfer; Heat transfer coefficients; Monitoring methods; Power plants; Pressure; Product design; Shutdowns; Simulation; Temperature; Temperature effects; Temperature sensors; Thermal power; Thermal power plants; Thermal stress; Thermoelectricity; Wall temperature
• ISSN: 2267-1242; 2555-0403; 2267-1242
• DOI: 10.1051/e3sconf/201910801003

Thick-wall components of the thermal power unit limit maximum heating and cooling rates during start-up or shut-down of the unit. A method of monitoring the thermal stresses in thick-walled components of thermal power plants is presented. The time variations of the local heat transfer coefficient on the inner surface of the pressure component are determined based on the measurement of the wall temperature at one or six points respectively for one- and three-dimensional unsteady temperature fields in the component. The temperature sensors are located close to the internal surface of the component. A technique for measuring the fastchanging fluid temperature was developed. Thermal stresses in pressure components with complicated shapes can be computed using FEM (Finite Element Method) based on experimentally estimated fluid temperature and heat transfer coefficient