## Related questions with answers

Water is the working fluid in an ideal Rankine cycle. Superheated vapor enters the turbine at 10 MPa, $480^\circ C,$ and the condenser pressure is 6 kPa. Isentropic efficiencies of the turbine and pump are 84% and 73%, respectively. Determine for the cycle a. the heat transfer to the working fluid passing through the steam generator, in kJ per kg of steam flowing. b. the thermal efficiency. c. the heat transfer from the working fluid passing through the condenser to the cooling water, in kJ per kg of steam flowing.

Solution

Verified$\text{\textcolor{#4257b2}{\text{Given\;data:}}}$

$p_1=10\;\text{MPa}$

$T_1=480^\circ\text C$

$p_3=6\;\text{kPa}$

$\eta_T=84\;\%$

$\eta_P=73\;\%$

$\text{\textcolor{#4257b2}{\text{Date\;from\;steam\;tables:}}}$

data at $10\;\text{MPa}$ and $480^\circ\text C$:

$h_1=3321.4\;\frac{\text{kJ}}{\text{kg}}$

$s_1=6.5282\;\frac{\text{kJ}}{\text{kg\;K}}$

data at $6\;\text{kPa}\to0.006\;\text{MPa}$:

$h_f=150.15\;\frac{\text{kJ}}{\text{kg}}$

$h_g=2415.92\;\frac{\text{kJ}}{\text{kg}}$

$s_f=0.51624\;\frac{\text{kJ}}{\text{kg\;K}}$

$s_g=7.82\;\frac{\text{kJ}}{\text{kg}}$

$v_f=0.0010062\;\frac{\text m^3}{\text{kg}}$

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