Gaseous Oil Shell-and-Tube Heat Exchanger with the Safe Channel in the Oil System of Gas Turbine Engine for the Gas-Compressor Unit

Abstract

To design the equipment for chemical and petrochemical industry, power units, etc. economic indexes are selected as the efficiency criterion especially in conditions of severe competition on the market. The economic indexes are the most informative, because these take into consideration the sphere of production and the sphere of operation. The purpose of this scientific paper is to determine the economic efficiency of the use of gas-oil shell-and-tube heat exchanger with the safe channel in the oil system of gas turbine engine for the gas-compressor unit. Two options of the heating of fuel gas of the gas turbine engine for the gas-compressor unit have been analyzed. The first option uses the fuel gas heater of a flame type and the second option uses the gas-oil shell-and-tube heat exchanger with the safe channel. The investigation was carried out by way of the solution of equation system that includes the equations of thermal balance, heat transfer and the objective function - reduced costs. This investigation allowed us to economically substantiate the use of gas-oil shell-and-tube heat exchanger with the safe channel to heat the fuel gas using the oil heat of the lubricating system of gas turbine engine. It is shown that the use of gas-oil shell-and-tube heat exchanger with the safe channel allows us to reduce power and fuel gas costs and as a result reduce the total amount of operating costs. The saving rate due to the use of gas-oil shell-and-tube heat exchanger with the safe channel for the oil system of the gas turbine engine of gas-compressor unit is about 593 thousand UAH a year.