Last year project

Marines :

The project includes utilisation of the remnant heat present in the exhaust gases of the conventional(without supercharging) diesel engine based cars.In our model we are using this exhaust heat to convert water circulating in a closed loop system to steam ,which is used to drive a Turbine coupled with the Crankshaft.Inorder to have maximum extraction of residual heat the water is allowed to pass though the exhaust gas passage twice.

First passage creates a steam and water mixture in the line while the second one comprising of a superheater is placed very close to the exhaust valve(temperature ranges from 600-800⁰C) and it makes the steam superheated.This steam is then injected on the turbine blades through the nozzle where its expansion takes place which produces additional drive for the engine.It has been estimated that with this method 80% of the residual heat present in the exhaust can be extracted and it provides additional torque and power to the engine leading to an increase in almost 15% fuel efficiency.

The project basically is a small scale steam engine being incorporated in the car which utilizes the exhaust energy for steam production.

The project works on the principle of combined cycle.The energy from the exhaust gases are used to heat the water being pumped to the steam generator and then superheated.This steam is expanded on the turbine and provides output to the crankshaft.By carnot cycle efficiency =output power\input power. Since we have kept the input power constant while the output has been increased so efficiency has been increased.

The turbine gets coupled with the crankshaft when the engine attains certain requisite speed. This engagement of coupling is controlled with the incorporation of a host of sensors like temperature, flow ,pressure sensors.