Up to now, the production of the cold is undertaking mainly by the classical way of compression
refrigerator cycle. The cycle need an electrical power or mechanics expense for the training of the
compressor and the C.F.C for their functioning. Most of the C.F.C impoverish the layer of ozone and
participate with a considerable manner, to the increase of the sere effect, then to climatic changes. To
contribute to the rational utilisation of energy and the protection of the environment, the research undertaken
in the area of the cold has been mainly oriented to a new process adaptation in many fields like the food
product conservation and climatisation. This can be obtained by the utilisation of process and sources of not
conventional energy like the combined absorption process and solar energy. Besides the environmental
aspect, these refrigerator systems are of great interest in the far rural zones which are not served by the
electrical network, particularly for food product conservation and the air conditioning of tourist
infrastructures and hotels in distant rural zones. Absorption cycles are autonomous systems which can
provide a solution to this problem. After modelisation of the absorption refrigerator machine functioning
with LiBr-H2O, by determining energy and mass statements of each cycle element supposed in the permanent
regime. We have determined the COP of the solar single-stage absorption refrigerator as a function of the
temperature in the different components of the cycle. Therefore, we have changed the dimension of the cycle
by introducing double-line heat exchanger (between generator-condenser and between evaporator-generator).
In this study, we present the variation of the COP and the heat-transfer rate with different temperature of the
cycle, the obtained values are compared with an improved configuration using a double- line heat exchanger.