Question

Evaluate a simple Rankine cycle 2-phase power system that produces a net power of 500 kW using R-134a as the working fluid. The heat source temperature is 43C and the heat sink temperature is 10C. Assume an ideal liquid pump.

Show cycle analysis calculations for one operating condition

Hint

That decision is about the pressure for the high pressure states. That decision comes down to state 3. It must be in the superheat region with a temperature of 43C. If you look at the R134a superheat tables, you should discern that the pressure must be less than 1.2 MPa (because saturation temperature is over 46C at that pressur). You must select a pressure below that such that 43C will provide superheat.

Answer 1

To evaluate a simple Ranking Cycle2 - phase power system that produces a net power = 500 kw using R- 134 a as the working fluid heat source temp^= 43 cheat sink temp^= 10c \r\n to sketch the diagram To find ut the carnot cycle efficency (eta)_carnot = 1 - 10c/43 c therefore 43 c = 273 + 43 = 316 k 10c = 273 + 10 = 283 k To take values eta_carnot = 1 - 283/316 = 0.1044 To represent the T -S dies^To show cycle analysis calculaotro one oprating condition Here th deciion is about the present for the high pressure states that decision comes down to state 3 therfore Here the R134 a Super heat tables should discern the pressure must be less than 1.2 mpa since w_t = 500 Kw w_p = (h_4 -h_3) where, w_t is the total work done temp^& w_p is work done pressure