Design Modifications of Alpha Stirling Engine for Reducing the Cylinder Pressure Loss and the Blow-By

This work focuses on a new approach to design a Stirling engines with the goal of building a working model. This Alfa type Stirling engine had two kinetic luna engines, one is used as hot expansion cylinder and another as cooled compression cylinder. Both the cylinders are connected by – using crank pin to link the two connecting rods with the crank shaft and by using pressure pipe with heat exchanger to connect the two heads. Alpha stirling engine has high power to volume ratio but it has technical problems due to high temperature, the durability of its seals get reduced. In this, the regenerator is an internal heat exchanger and temporary heat is stored in between the hot and cold spaces such that the working fluid passes through it first in one direction then in reverse direction. The compression ratio of the engine is calculated analytically and the pressure is measured by using pressure gauge. The design of the engine is modified and the leakages at the joints and blow-by are detected and are reduced.