Design and building of Cascade Refrigeration chamber - has a capacity of 30 litter - Operating at -65 C , using R404a and R23 as refrigerants

Abstract

Design and building of a cascade refrigeration chamber with capacity of 30 litter operating at -65 oC, using R-23 and R-404a as refrigerants . This project can be considered as an implementation of the featured project and sciences theory in a practical model . Cascade refrigeration cycle is one of most suitable cycles for application that needs very low temperature . The system consists of two separated cycles connected with each other through a heat exchanger, where the higher cycle using refrigerants R-404a operates between (35 to -32oC) , the lower cycle using refrigerants R-23 operates between (-27 to -65oC) this cycle find application in different scientific fields such as storage of blood plasma and storage of tissues which need a very low temperature . The project is suitable for many fields, The most important field that can benefit from this project is the scientific field . And Commercial field can benefit from this project .