Refrigerant- 134a is used as the working fluid in a simple ideal rankine cycle which operates the boiler at 2000 kpa and the condenser at 24°c. the mixture at the exit of the turbine has a quality of 93 percent.

determine the turbine inlet temperature, the cycle thermal efficiency, and the back- work ratio of this cycle. (put in thermal efficiency in percent)

Apipe with an outside diameter of 15 cm is exposed to an ambient air and surrounding temperature of -20°c. the pipe has an outer surface temperature of 65°c and an emissivity of 0.85. if the rate of heat loss from the pipe surface is 0.95 kw per meter of length, the external convective heat transfer coefficient (h) is: (a) 12.5 w/m"k (b) 18.6 w/mk (c) 23.7 w/mk (d) 27.9 w/mk (e) 33.5 w/mk