Regenerative gas refrigeration cycle: Pressure Ratio = 5, Compressor inlet temp. = 00C, Turbine inlet temp. = - 800C, Regenerator inlet (from the compressor side) temp. = 350C, Efficiency of the turbine = 85% and the efficiency of the compressor = 80%. Consider constant specific heats with Cp = 1.005 kJ/kg. K, k = Cp/Cv =1.4. Determine: (a) The effectiveness of the regenerator, (b) the heat removal in kJ/kg, and (c) the COP of the cycle. Also, find the Refrigeration load in kJ/kg and the COP for a simple refrigeration cycle with rp = 5, compressor inlet temperature of 00C and turbine inlet temperature of 35oC

Consider a power plant with water as the working fluid that operates on an ideal rankine cycle. it has a net power output of 45mw. superheated steam enters the turbine at 7mpa and 500°c (h=3411.4 kj/kg; s=6.8 kj/kg k) and is cooled in the condenser at a pressure of 10 kpa by running cooling water from a lake through the tubes of the condenser at a rate of 2000 kg/s. (a) show the cycle on a t-s diagram (a right schematic is fine - you do not need to calculate the temperatures at each point); (b)-determine the work done by the turbine and the pump in kj/kg; (c)-the mass flow rate of water used by the power plant; (d)-the thermal efficiency of the cycle; (e)-the temperature rise of the cooling water. assume the cooling water is incompressible with cp 4.18 kj/kg°c.