Thermodynamics SECOND LAW OF THERMODYNAMICS4-5: Steam exhaust from the turbine is condensed in the condenser in which heat istransferred to the cooling water under a constant vacuum condition.5-6: The feedwater is compressed as a liquid by the condensate and feedwater pumpand the feedwater is preheated by the feedwater heaters.6-1: Heat is added to the working fluid in the steam generator under a constantpressure condition.Figure 35 Typical Steam CycleThe previous cycle can also be represented on a T-s diagram as was done with the ideal Carnotand Rankine cycles. This is shown in Figure 36. The numbered points on the cycle correspondto the numbered points on Figure 36.It must be pointed out that the cycle we have just shown is an ideal cycle and does not exactlyrepresent the actual processes in the plant. The turbine and pumps in an ideal cycle are idealpumps and turbines and therefore do not exhibit an increase in entropy across them. Real pumpsand turbines would exhibit an entropy increase across them.Rev. 0 Page 91 HT-01
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