Hydroelectric Power Generation - Renewable Energy: Technology, Economics and Environment - page 355

Intake

Power house

Screen

Headwater

Dam

Tailwater

Fig. 8.5 Example of a typical run-of-river power station (see /8-5/)

For run-of-river power stations different arrangements of the powerhouse and
the dam within the riverbed are possible (Fig. 8.6). In principle, block, twin block
or multiple block designs can be distinguished; this differentiation is related to the
respective locations of the dam and the powerhouse (Fig. 8.6). The third setup, the
submergible design, is independent of the other two. Here, the powerhouse is
within the dam (Fig. 8.6). These different designs can be subdivided further into
the designs described below.

Type of design

Connected Detached Submergible

Turbine

Dam

Conventional
power station

Indented
power station

Twin block
power station

Power station
in bridge pier

Submersible
power station

Fig. 8.6 Systematisation of run-of-river power station design

•

Conventional block design. In a block layout, the longitudinal axis of the
power house and the dam are perpendicular to the course of the river. This de-
sign is only possible if the highest flood can still be conveyed without prob-
lems through the retaining dam sections, without upstream flooding. The
power station is normally located in bends because of the lower amount of bed
load at the outer riverbank (Fig. 8.5, Fig. 8.6).

• Indented power station. The powerhouse is set up outside the actual riverbed

in an artificially created bay (i.e. connected design; Fig. 8.6). This setup is re-