C. Air-conditioning system design Several tools dedicated to the simulation and prediction of the behavior of solar cooling systems. In this study, TRANSOL 3.0 [11] is used. TRANSOL proposes several configurations of solar cooling systems. The retained design is shown in Fig. 3. This configuration includes- in addition to space cooling- domestic hot water production and space heating. This driven system consists of a set of solar collectors. The thermal collector field is connected to the solar storage tank via an external heat exchanger. The primary loop (right side of the heat exchanger) is controlled by the solar radiation while the secondary loop (left side of the heat exchanger) is controlled by the storage tank temperature. The storage is directly linked to an absorption cooling unit. The heat rejected (See Fig. 1) by the condenser (Qc) and the absorber (Qa) of the machine is evacuated by a cooling tower. To save the excess of cold production, a cold storage tank is coupled with the evaporator of the absorption system. Otherwise, a compression cooling machine is served as back-up in order to avoid the breakage of the cooling production.