Авіаційно-космічна техніка та технологія (Aug 2019)
APPLICATION OF THERMOCHEMICAL WASTE HEAT RECOVERY IN POWER PLANTS OF HIGH-TECH SHIPS
Abstract
The research’s subject is the processes of energy transformation of fuel in the ship power plant with thermo-chemical waste heat recovery. Modern approaches to assessing the energy efficiency of ship power plants were considered. The characteristics of traditional and perspective ships were analyzed. Passenger ships (including Ro-Ro ferry and cruise ships), offshore ships (including FPSO, FSRU, MODU, OSV, etc) and LNG/LPG carriers are classified as high-tech ships. It is discussed the application of thermo-chemical waste heat recovery in power plants of high-tech ships. It is proposed to increase the efficiency of fuel use by using synthesis gas obtained through thermo-chemical heat recovery of secondary energy resources of ship engines. The main objective of the study is to analyze the energy efficiency of steam thermo-chemical transformation of fuel in ship power plants. It is presented the design scheme of the marine power plant for an offshore platform. It is shown the mathematical model of the ship gas turbine installation with thermo-chemical heat recovery by steam conversion of associated gas. The associated gas conversion efficiency was determined by the heat potential of the exhaust gases and was calculated based on the thermal balance of the thermochemical reactor. The reactor has two stages. It is presented the results of mathematical modeling of processes in plant-based on gas turbine engine of the simple cycle under conditions of fixed output power, the fixed temperature of the gas in the turbine’s front for environmental parameters according to ISO 19859: 2016. It is revealed the efficiency of the scheme which used steam conversion of associated gas in the two-stages reactor. Calculation of thermo-chemical conversion efficiency indicators showed the complete conversion of heavy hydrocarbons. The increase in the energy efficiency of the installation is 10...12%. The results obtained coincide with previous studies and confirm the effectiveness of the use of thermo-chemical heat recovery in power plants of high-tech ships. The research results can be used in the promising marine power plants designing.
Keywords
