Read the following data for a NH3 based refrigeration plant and answer the questionsA single cylinder, single acting compressor bore and stroke: 16 cm and 24 cmSpeed: 110 RPMThe indicated mean effective pressure : 2.1 barThepressure limits: 9.7262 bar and 2.6785 barThe temperatures at entry and exit of condenser 38°C and 16°CThe mass flow rate of cooling water : 14 kg/minThe rise in temperature of water: 8°CThe mass of ice produced : 56 kg/hr @20°CPressure, barSaturation temperatureEnthalpy, h, kJ/kgSpecific heat, Cp, kJ/kg KLiquidVapourLiquidVapour9.726224313.111482.494.7913.1132.6785-12144.911447.914.5452.482Assume: Lice = 335 kJ/kg and Cp,water = 4.19 kJ/kg K1)Find the compressor work, kWa.2.26b.1.86c.3.23d.2.65 2)COPa. 2.76 b. 2.42 c. 4.32d.3.51 3)Mass flow rate of NH3, kg/min a.0.375b.1.23c. 0.826d.2.642 4)The refrigeration effect in kJ/kga. 1562.1b.1043.2c.2214.3d.883.2 5)The quality of NH3 entering the compressora. 0.77b.0.79c.0.68 d. 0.9

poralla vinay , 6 Years ago

Grade 12th pass