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Wind effects on air-cooled condenser performance

One of the most significant systems which play a crucial role in power production is the cooling systems. This paper concentrates on the effects of different wind direction and speed on the performance of a complete threedimensional Air Cooled Condenser (ACC). The ACC model is simulated using the Fluent computational fluid dynamics (CFD) software. The hot air recirculation (HAR) is a common trouble in the air-cooled power units. HAR is affected by the arrangement of the air-cooled island, the environmental condition around the direct air-cooled system, wind direction and wind speed. In this paper, two different wind directions are considered: for case A the wind direction angle α= 90° and β=66° for case B. Results show that the plume rise angle (angle between plume and vertical) enhanced with the increase of wind speed. The hot air recirculation increases with the increment of velocity speed. Case A has a critical wind direction angle. Wind causes an air temperature increase at the fan inlet due to hot air recirculation, resulting in the deterioration of the heat transfer performance. The hot air recirculation is the main factor responsible for the reduction of heat rejection rate. The peak value of the hot air recirculation occurs at 9 m/s and wind direction angle in case A. Key-Words: ACC, wind, speed, direction, HAR, performance