Intensification of heat exchange in fire-tube boiler using nanofluid as 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 through the use of nanoparticles. The criterial equation describing heat exchange in the volume of a hightemperature organic heat transfer fluid under natural convection for clean and nano- fluids is presented. The basic equations for the thermal calculation of the fire-tube boiler are considered. Based on the results of the calculated experiment, graphs of the dependence of heat transfer coefficient from the heat transfer fluid and the boiler furnace, boiler wall temperature, heat transfer coefficient for gas tube bundle, area of gas tube bundle on the volume fraction of nanoparticles in the heat transfer fluid.