The dependence of industrial societies to energy sources leads the renewable energies such as sun energy to be noticeable. Nowadays, various solar systems are designed and used. But the thermal and refrigerating solar systems usually have some problems with temperature control. These systems use solar collectors which can reach stagnation temperatures exceeding 170centigradethat can impair solar systems. Having recognized the harmful effects of stagnation, a mechanism for limiting the temperature of solar collectors was developed. Also heat transfer and thermal analysis was conducted to obtain a suitable design. Based on this analysis a cooling channel of 17 mm depth was found to be adequate if the interior of the channel was coated with a high emissivity coating. For designing thermal actuator, shape memory alloys were investigated. In the solar collector temperature control apparatus, an OWSME thermal actuator has been designed and used. This thermal actuator has special features. it can produce large force and stroke as well as TWSME actuators. By the way it is temperature regulatable for users and designers. So it can be used in wide range of applications. In this thesis, also, the way of installation of temperature control apparatus with its plans, solution of isolation have been discussed. Keywords: solar collector, Shape memory alloy, Thermal actuator, One way shape memory effect, Two way shape memory effect, Constitutive law
