Assertion: pelton turbine | /r/HasProperty | considered for head
Facets:
value: above 150 m
type: LOCATION
value: normally only
type: DEGREE
Source sentences:
text: http://europa.eu.int/en/comm/dg17/hydro/layman2.pdf In large scale hydro installation Pelton turbines are normally only considered for heads above 150 m, but for micro-hydro applications Pelton turbines can be used effectively at heads down to about 20 m. Pelton turbines are not used at lower heads because their rotational speeds become very slow and the runner required is very large and unwieldy.