Exergetic efficiency of comminution of solid substances

Abstract Based on literature data, a short description of a method for determining the internal energy increase of material due to enlarging its surface area in a comminution process, is given. An exergy balance of the comminution of a solid substance, has been discussed. A method for determining the exergetic effect of comminution, has been presented. Generalized exergetic efficiency of comminuting installation has been defined and the efficiency of the common cases of comminution has been discussed. Examples of exergetic efficiency values of pneumatic jet mill comminuting sand and of EM-70 mill for coal, have been calculated.