flow for an additional 10% efficiency reduction at rated EnD. This
compares favourably with previously presented data on PAT performance
by Yang et al. [13], Williams et al. [10], Derakhshan and
Nourbakhsh [14] and Singh [2] that all report significant reduction
in turbine operation efficiency due to the inherent lack of inlet flow
control and associated large incidence losses. In the sphere of
micro-hydro remote area power installations the ability to operate
efficiently at off-design conditions is extremely important as water
storage reservoirs are often limited in capacity and catchments are
subject to highly fluctuating, often seasonal inflows. and a further 20% decrease in