Steam enters an adiabatic turbine operating at steady state with an enthalpy of 3251.0 kJ/kg and leaves as a saturated mixture at 15 kPa with quality (dryness fraction) 0.9. The enthalpies of the saturated liquid and vapour at 15 kPa are hf = 225.94 kJ/kg and hg = 2598.3 kJ/kg respectively. The mass flow rate of steam is 10 kg/s. Kinetic and potential energy changes are negligible. The power output of the turbine in MW is:
8.9
Exit enthalpy is hf+x(hg−hf)=225.94+0.9(2598.3−225.94)=2361.064 kJ/kg. Power is 10(3251−2361.064)/1000=8.89936 MW≈8.9 MW.
Important Questions from Rankine Cycle
In a cross compound steam engine _____.
The concept of regeneration is used in which cycles?
The Rankine cycle will approach to Carnot cycle if
In order to increase the efficiency of Rankine cycle, Which one of the following statement is incorrect?
Which combination of the following statements is correct? The incorporation of a reheater in a steam power plant
(P) Always increase thermal efficiency
(Q) Always increase the dryness fraction at the condensed inlet
(R) Increase the mean temperature of heat addition
(S) Always increases specific work output
