Energy conservation (cont.)

Generalized energy concept:

Energy added, hA

(ex. pump, compressor)

Energy extracted, hE

(ex. turbine, windmill)

Energy loss, hL

(ex. friction, valve, expansion)

pump

turbine

heat exchanger

condenser

hE

hA

hL, friction loss

through pipes

hL

loss through

elbows

hL

loss through

valves

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