Steam Turbocharging

Abstract

A new concept of steam turbocharging is proposed in this project which finds a solution for the major disadvantages of conventional turbocharging systems. In conventional turbocharging system the turbocharger starts operating only after certain engine rpm. The back pressure generated at the engine exhaust is also high in conventional systems. These disadvantages are being solved in this proposed project. The major objectives of this project are to achieve a target boosting pressure of 1.5 bar at the engine inlet, to reduce the backpressure at the engine exhaust and to increase the operating range of turbocharger. The IC engine exhaust energy is used to generate steam and then drive the turbine. Part of steam expansion power is used to drive air compressor. The heat exchanger and turbine are designed and simulated and the performance is analyzed. The results show that IC engine power can be increased by increasing the inlet boosting pressure. The analysis shows that in steam turbocharging system, the turbocharger starts working at 1000 rpm and has less exhaust back pressure compared to ordinary turbocharger.