2—15 A river ﬂowing steadily at a speciﬁed ﬂow rate is considered for hydroelectric power generation by collecting the water
in a darn. Fora speciﬁed water height. the power generation potential is to be determined.
Assuiirprfons 1 The elevation given is
5-55 Helium is compressed by a compressor. For a mass flow rate of 90 kg/min, the power input required is to be
Assumptions 1 This is a steady-flow process since there is no change with time. 2 Kinetic and potential energy
changes are negligib