Simulation of the Absorption Phase of an Intermittent Absorption Solar Refrigeration System

摘要

The use of solar energy in sunny countries in rural areas is an effective way to overcome the lack and the difficulty to supply into electrical energy. It is therefore important and necessary to exploit this natural and clean resource. Among the methods of thermal conversion of solar energy, solar refrigeration is the most suitable application for the storage of foodstuffs and pharmaceutical products. This refrigeration may be ensured through compression and absorption cycles in continuous or in intermittent operation. It is up to solar absorption cycles operating intermittently that we are interested. This cycle consists of two phases: generation and absorption phase. The phase of generation was modeled for the installation which was designed and realized in the research unit. The modeling of the absorption phase of a refrigeration cycle operating intermittently, is the subject of this study, it was determined the mass and energy balances for each element. The resolution of the system of equations obtained is based on computing and mathematical tool. Exploitation of the results of the simulation has been performed in a first time without considering thermal losses and then introducing these losses,in different compartments of the installation, in a second step. The interpretation of different gaits aims to describe quantitatively the evolution of the characteristic variables of functional components for the absorption phase in particular temperatures, flow rates and powers exchanged.