Some problems of disperse medium use in heat exchangers

The application of disperse media in heat-exchange equipment has been investigated experimentally. The authors studied heat transfer from a horizontally positioned cylinder to a layer of particles of oil-liquefied electrically produced corundum and pig iron. The coefficient of heat transfer from the cylinder to the particle layer increases 2.5 - to 3-fold as compared with pure oil, and an increase in particle diameter increases the heat-transfer coefficient. Calculations with a system with a gas suspension (a suspension of gas and solid particles) used as intermediate heat-transfer agent showed that the total surface area of its heat exchangers will be 35% larger than that of a similar system with water