2 Saturated ammonia at 0.23571 MPa enters a single acting compressor and liquid ammonia at 21C enters the expansion valve of a refrigerating plant. If head pressure is 1.1638 MPa, then the COP of the refrigerating cycle is [Correct upto 1 decimal places) Given: Cp (Liquid NH2) = 4.6 kJ/kgK; C (Vapour NHA) = 2.75 kJ/kgK Sp. Vol of Enthalpy of Enthalpy of Entropy of Entropy of (MPa) vapour liquid NH liquid NH vapour NH (m /kg) (kJ/kg) (kJ/kg) 5.4387 P Sat. temp. (C) vapour NH, (kJ/kg) (kJ/kg) 0.23571 -15C 0.5106 168.56 1481.52 10.526 1.1638 +30C 0.11084 3793 1523.42 6.1853 9.9606