EFFICIENT POWER GENERATION ON GDS USING GAS PRESSURE DIFFERENTIAL

Abstract

Ukraine's gas transport system of high pressure gas pipeline provides natural gas transit through its territory of up to 110 billion m3 per year. A gas supply to various consumers inside the country is on the low-pressure gas pipelines in the amount of 62 billion m3 per year. The selection from the main gas pipelines with the simultaneous decrease in pressure is performed at gas distribution stations (GDS). When the gas expansion in expansion turbine unit on GDS at 4 up to 0,6 MPa can be developed to 47 kWh of electricity with each 1000 m3 of gas. On the 54 GDS in Ukraine can be produce up to 2 billion kWh of electricity per year. The gas expansion in the expansion turbine unit leads to a reduction its temperature is minus 100 °C. To provide temperature of the gas after the installation does not below 10 °C have to raise its temperature by using a heater firing, consuming a portion of natural gas. The analysis showed that the more profitable from this gas to produce electricity by using a gas turbine engine (GTE), and the warmth of its waste gases use for heating the main stream gas before the turbo expansion. Evaluation of fuel and economic efficiency has allowed to establish that a profitable version of the complex with a GTE 1 MW and turbo expander.