Serhiienko R. The development and thermodynamic analysis of thermal schemes of recycling power plants on low-boiling working bodies for compressor stations

The object of investigation is the thermal schemes of recycling plants with low-boiling working bodies (LWB). The purpose of the work is justification for the use of waterless steam technologies utilization of waste heat of compressor stations to increase the efficiency of the gas transportation system by producing additional electricity or mechanical energy. The investigation methods are a modeling, engineering calculations and energy analysis. The main results of the work are: (a) The methods of the thermodynamic power Rankine Cycle calculating are improved. It allows to take into account the thermophysical properties of working bodies; (b) Introduction of LWB heater with compressed natural gas in blowers to the scheme of utilization units is proposed, which will increase capacity utilization units; (c) The scheme of combined unit with complex system of regulation of initial temperature at the inlet to the turbine and condensate heater settings is proposed, thus increasing the turbine power and twice extend the operating range of the plant on alternate modes of GTP; (d) A modified combined Rankine cycle with isothermal compression of the working body is proposed and investigated. It is allow to condense air in capacitors at the ambient temperatures; (f) Rational workflow settings of recycling units and characteristics of heat exchange equipment are defined; (g) Specific heat schemes and recommendations for the design of new recycling units are developed that allow to obtain 30% more power from the basic GTP; (h) The impact of hydraulic resistance of waste heat exchange equipment on power of the base power plant is taken into account and assess The results of the work are implemented in: (а) IR "Masheksport", PAO "VNIPITRANSGAZ" and "Ukrtransgaz" in the development of projects of modernization and reconstruction of compressor stations of main gas pipelines (Kyiv); (b) research and production enterprise "Engineering" in the form of methods for calculating the efficiency of the steam power working cycle of power plant with its work on variable modes (Dnipropetrovsk).