Heat exchange processes in volume of fire-tube boiler with non-water heat transfer fluid

Abstract

The article suggests the solution of problems related to the intensification of heat transfer from the high-temperature organic heat transfer fluid. The main advantages of high-temperature heat transfer fluid are given. Heat transfer processes by heat conduction and convection are considered. The criterial equation describing heat exchange in the volume of a high-temperature organic heat transfer fluid under natural convection is presented. The description of a nanofluid and its main characteristics are given. Present models of calculating the basic thermophysical properties of a nanofluid (density, heat capacity, viscosity, and thermal conductivity) are presented. Based on the results of the calculated experiment, graphs of the dependence of density, heat capacity, viscosity, thermal conductivity, Grashof number and heat transfer coefficient of ditolylmethane and nanofluids based on it (ditolylmethane + Cu (1%) and ditolylmethane + Cu (5%)) on temperature are plotted.

Keywords

• high temperature heat transfer fluid
• fire-tube boiler
• nanofluid
• thermal conductivity
• coefficient of heat transfer
• nonwater heat transfer fluid