Abstract
We investigated the aerodynamic characteristics of the concentrated photovoltaic system (CPV) of two-divided-panel type. Since the acceptance side of the conventional type of CPVs always faces upside in the night, the accumulated sands or dusts on it impede power generation. For the CPV of two-divided-panel type, the panels can be rotated upside down, and it is easy to clean up the acceptance side. Attention was focused on the effects of the slit between the two panel. It was found that for symmetric attitudes with no yaw angle and small angles of incidence, there exists bi-stable mode in the moment around the shaft.
