Question

Figure P8.13 provides the steady-state operating data for a solar power plant that operates on a Rankine cycle with Refrigerant 134a as its working fluid. The turbine and pump operate adiabatically. The rate of energy imput to the collectors from solar radiation is 0.3 kw per square meter of collector surface area, with 60 percent of the solar input to the collectors absorbed by the refrigerant as it passes through the collectors. Determine the solar collector surface area, in square meters per kW of power developed by the plant. Discuss possible operational improvements that could reduce the required collector surface area.

 

State1 p1= 18 bar h1=276.83 kj/kg x1=1

State 2 p2=7 bar h2=261.01 kj/kg x2=0.9952

State 3 p3=7 h3=86.78 x3=0

State 4 p4=18 h4=87.93 and no x4

Answer 1