Theoretical analysis of a diffusion-absorption refrigerator

This paper proposes an elaborated simulation model for an ammonia/water diffusion-absorption refrigerator, developed to describe and predict the behavior of the device under different operating conditions. This model describes the function of the different components of the system, namely condenser, evaporator, absorber, heat-exchangers, bubble pump, boiler and rectifier. The coefficient of performance of the machine (COP) is calculated for different power supply to the refrigerant in the range 100-250 W. It is found that the COP of the machine under the standard operating conditions is about 0.128.