IMPROVEMENT OF INDICATORS THE SYSTEM OF LNG REGASIFICATION AND NATURAL GAS SUPPLY IN THE MAIN GAS PIPELINE

Abstract

In Ukraine the construction of an LNG terminal capacity of 10 billion m3 per year is planned. In organizing the supply of such quantities of natural gas into the gas transportation system the cold LNG regasification is advisable utilize for the production of electricity in power plants operating in a closed Rankine cycle. Enthalpic diagram analysis LNG regasification at the pressure of  90 bar showed that the share of cold, which can be diverted from the LNG at the organization heat exchange processes in the temperature range –155…–100 °С; –100…–50 °С; –50…0 °С и 0…20 °С and 20 °C will be 25; 28; 35 and 12 %, respectively. Efficiency the transformations of cold in work on each temperature level will be 53, 26, 16 and 5 %, respectively.  Proposed cascade scheme regasification of  LNG. Determine the specific theoretical (41,5 kWh) and the real (30 kWh) indicators of electricity produced at 1 m3 of  LNG regasification. Power generation efficiency at the converting cold to work reaches 72 %. Amount of electricity produced, which is given to the external customer taking into account the specified capacity of the terminal, will amount to 55 MW.