Question

You are considering building a solar power plant that uses CCl_2F2 as its working fluid. It enters the turbine as a saturated vapor at 1.7 MPa and leaves at 0.7 MPa. Based on the ideal Rankine cycle, determine the efficiency. Property data for CCl_2F2 may be found at source.

a) 30%
b) 50%
c) 70%
d) 90%

Answer 1

To calculate the efficiency of the solar power plant using CCl2F2 in the Rankine cycle, specific enthalpy and entropy data are needed, which are not provided in the question. Efficiency will be below 100% due to inevitable thermodynamic losses.

Step-by-step explanation:

To determine the efficiency of a solar power plant using CCl2F2 as its working fluid based on the ideal Rankine cycle, we would need to refer to thermodynamic tables for CCl2F2 to find specific enthalpies and entropies for the given pressures. However, the efficiency calculation for the ideal Rankine cycle essentially involves calculating the work done by the turbine and the work required by the pump to pressurize the working fluid, along with the heat input into the system. Without the actual property data for CCl2F2, we cannot calculate the efficiency of the cycle, but we can say that it will usually be less than 100% due to thermodynamic losses such as friction, heat transfer to the environment, and the practical limits set by the second law of thermodynamics.