The thermal-stress state of heat-sensitive ceramic tubular systems in the case of convective heat exchange

A study on thermal stress deformation using analytical methods based on the temperature distribution of storage material in a rotary air-preheater

“…A method for calculating the mass flows of gas through the seals was also introduced [8], and an adjusting method to reduce the seal clearances in radial seals was further presented [9]. Gromovyk and Ivanik [10] determined the thermal stresses and displacements that occur in an elastic hollow ceramic circular cylinder when convective heat exchange occurs. However, few researchers place their focus on the thermal stress deformation of the rotary air-preheater; while methods that can be used to calculate the deformation results based on the temperature distribution have not been developed.…”

Analysis on thermal stress deformation of rotary air-preheater in a thermal power plant

“…He presented a method for calculating the mass flows of gas through the seals [5], a method of measuring and adjusting the seal clearances in radial seals is also analyzed by him [6]. The thermal stresses and displacements that occur in an elastic hollow circular cylinder made of ceramics, when there is convective heat exchange are determined by Gromovyk [7]. …”

“…Larsen [23] have presented a simplified method for the transient response of a heat storage unit initially at a uniform temperature and exposed to a step change in the inlet fluid temperature. In the simplified analysis the following assumption have been made: (1) Constant fluid and material properties; (2) Infinite thermal conductivity for the solid in the height direction; (3) Zero thermal conductivity for the solid in the radical direction; (4) Uniform heat transfer coefficient; (5) Step change in inlet fluid temperature; (6) Uniform initial temperature distribution in each storage material; (7) No heat transfer through the sides of the storage unit; (8) Constant fluid flow rate.…”