THE METHOD OF THERMAL ENERGY RECOVERY OF EXHAUST GASES OF INTERNAL COMBUSTION ENGINE

Abstract

In modern internal combustion engines, the part of the fuel energy that is consumed for useful energy is on average 35 percent. Up to 30 percent is spent during the combustion of fuel, which is removed with the exhaust gases of the engine. There are many ways to increase the efficiency of an internal combustion engine, one of which is a way to increase the efficiency by recuperating heat losses, implying the use of a device for converting thermal energy into electrical energy, operating on the Seebeck effect. (Research purpose) The research purpose is developing an experimental installation for the recovery of thermal energy from exhaust gases of an internal combustion engine into electrical energy and deducing the regularities of the thermoelectric generator in the power supply system in automotive equipment. (Materials and methods) Applied methods of numerical analysis and computer modeling using computer programs ANSYS Thermal Steady State and Solidworks FlowSimulation. A laboratory stand operating from the D-65 engine was used as a power plant (Results and discussion) The dependencies of the generated voltage and current of the thermoelectric generator on the temperature of the exhaust gases and coolant of the internal combustion engine were obtained. The maximum generated power of the developed thermoelectric generator was 54.5 watts. The maximum current of the thermoelectric generator during operation of the experimental installation was 3.7 amperes with an output voltage of 22 volts. (Conclusions) The use of the developed thermoelectric generator for the recovery of the energy of the exhaust gases of the internal combustion engine makes it possible to increase the use of the heat released during the combustion of fuel and provides an additional source of electrical energy.