Reducing gas emissions and fighting climate change have become key issues of today's modern society. An energy efficiency strategy consists of developing policies and implementing measures and means to change the conditions of energy consumption in all economic and social activities by improving the efficiency of methods and consumer equipment. Energy efficiency improvement programs are important levers for reconciling growth, social development and respect to the environment. Through them, it is possible to commit sustainable development and to protect the global environment. Special interest is given to different configurations of hybrid refrigeration, which seems to be interesting when one has a heat source practically free. This process is more economical in terms of electricity consumption by ensuring an efficient production of cold. This work presents a comparison between the different configurations studied previously, those that work with organic couples and others that are powered with a photovoltaic unit. Analysis and evaluation of the performance of the heat pump is in question of its exergy efficiency, the destruction of total exergy as well as those relating to every element of the installation. Parameters evaluated are exergetic efficiency, coefficient of performance and the irreversibility relative to each configuration. Results show that the performance of the solar model is improved significantly while obviously using the organic mixture. Its energetic efficiency is 20% more important than that for the ammonia / water. Exergetic efficiency of the system is also improved by about 15%.