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eml 3100 rankine cycle - Thermodynamics The Rankine or...

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1 Thermodynamics The Rankine or Vapor Power Cycle Used in steam power plant operations Sample data…not our ideal cycle!!
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2 Thermodynamics Simple Ideal Rankine Cycle 1-2 isentropic compression with a pump 3-4 constant pressure heat addition in a boiler 5-6 isentropic expansion in a turbine 6-1 constant pressure heat rejection in condenser Other points can be used to describe pipe losses Constant pressure heat addition Constant pressure rejection
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3 Thermodynamics We will consider water(steam) as our motive fluid. The steam leaving the boiler (pts. 4 and 5) is usually superheated steam. The steam leaving the turbine (pt 6) is usually high quality steam. Remember that s 5 = s 6 The water leaving the condenser is either saturated liquid or subcooled liquid water. We usually assume that h 2 = h 1 . Or we can estimate h 2 = h 1 + v(P 2 -P 1 ). Let’s work an example problem to illustrate how this works. condenser
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4 Thermodynamics P h Consider a steam power plant and assume an ideal Rankine cycle to model the system.
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