ENERGY DEMAND IN AGGREGATE DRYING PROCESS

摘要

Hot bituminous mix is the basic element of the surface of road. This publication has been written in order to appreciate technological-, organisation- and material parameters influence on fuel consumption in aggregate's drying process. Algorithm made by author allow to monitor influence of many variable parameters ― as: graining of crushed stone, dustiness of crushed stone, density of crushed stone and water, humidity of crushed stone before rainfall and temperature of crushed stone in storage, height of storage, rainfall and influence of cover on humidity of crushed stone ― on single kind of crushed stone humidity and humidity of aggregate. This allow to determine power demand during drying in function of aggregate composition, calorific value of fuel, factor of dryer's thermal efficiency, thermal characteristic of mineral components, bitumen and water, temperature of cold components, hot bituminous mix and exhaust gas. In my estimation of this problem from energetic point of view, we should expect 38.8% expansion of consumption of diesel fuel oil, what is about 10% of price of bituminous mix.