One of the major problems encountered in greenhouse establishments is the ventilation and cooling processes of greenhouses. Natural ventilation employed in greenhouses is generally not sufficient. Compulsory ventilation applications should be provided to enhance the volume of ventilation. However, compulsory ventilation cannot be applied in greenhouses due to their location at countryside and lack of electric energy. This energy problem can be solved with the use of solar panels in greenhouses. 12 m2 fan pad area and 0,1 kW circulation pump intended for water circulation system are required for the installation of the cooling system to be founded in a high tunnel in Tekirdağ with the surface area of 298 m2. For operation of the required ventilation system, 4 aspirators with 0,55 kW power and 9500 m3h-1 flow rate will be sufficient. A 4 kW solar panel system will supply required energy for the cooling system.