In this proposed work, the main aim is to develop a portable refrigeration system with a capacity of 4 litres
of vaccine chamber. The system should be capable of maintaining the temperature of the vaccines between +2°C and
+12 °C range for a long time. Since the system has to be used in remote areas where power is scarce, alternative
sources of energy like battery or solar power has to be incorporated in the design. Since the system has to be portable,
it should be compact as well as light. Moreover the system is meant for outdoor use which makes better insulation and
radiation control mandatory. In order to meet worse scenario, even though the system is to designed for maintaining
a fixed chamber temperature throughout the operational period, the design should be such that it can adaptable for
refrigerating the chamber from ambient temperature to the required temperature.