EFFICIENT USE OF STEAM THERMAL ENERGY

Abstract

The results of theoretical studies of the use of selective steam of various parameters in consumer installations are presented. The values of heat losses during the transportation of steam to the consumer are determined. Heat losses during transportation are insignificant and do not exceed 0.05%. A TH-diagram of the thermodynamic process of operation of selected steam during adiabatic expansion and condensation is presented. It is shown that the main share of the thermal energy of steam is determined by the process of its condensation (up to 90% of the initial heat content). To convert the thermal energy of the selected steam into mechanical energy during its adiabatic expansion in the drive turbines of the consumer, it is necessary to choose the steam of the highest pressure. This will allow saving up to 50% of heat compared to low pressure steam. An exergy analysis of the system for the use of selective steam prior to its condensation has been carried out. The degree of thermodynamic perfection of steam use in this area is 45%.

The steam parameters for heat exchange units with condensation are determined by the temperature difference in the final section of the heat exchange path; otherwise, the initial steam parameters are practically indifferent to them. The main requirement for such installations is the presence of a steam trap in the condensate removal path and a reliable system for diagnosing its technical condition.