Author(s): Mustafa Gogus, Kutay Yilmaz, Abiddin Berhan Melek
Linked Author(s): Kutay Yilmaz
Keywords: Open channel flow, run-of-river type hydropower plants, tyrolean type intakes, intake racks, water capture efficiency.
Abstract: Run-of-river type power plants are preferred for locations where the construction of a reservoir is not possible or economic. Tyrolean weir is a water inlet structure in which water is abstracted from the main channel through a screen over a collection channel. Tyrolean weirs are known to be a very suitable solution to separate major part of the sediment in the river flow while it diverts the desirable amount of water to the system. Within the current study, a physical model of a Tyrolean weir was constructed in a channel of 7 m long and 1. 98 m wide at the laboratory. By varying the dimensions of the various components of the Tyrolean model; the length and inclination angle of the rack and the distance between the rack bars and the amount of water entering the system was measured. Based on a dimensionless expression derived by applying dimensional analysis to the related parameters for water capture efficiency of the system, its variation with the relevant parameters is presented. The results of these studies are compared with those previously obtained and the range of the rack angle which gives the maximum water capture efficiency is determined as 22�-25�
Year: 2017