Journey of Life

2010 Rajiv Gandhi Proudyogiki Vishwavidyalaya(Technical University) B. E genteel Engineering simulate QUESTION PAPER 2010, RGPV, Bhopal, Thermo fluid for Civil Engg. Question paper (1) fashion enters a nozzle steadily at 2. 21 kg/m3 and 30 m/s and leaves at 0. 762 kg/m3 and 180 m/s. If the entre knowledge domain of the nozzle is 80 cm2 , determine the mass flow stride and the exit area of the nozzle. (2) A frictionless piston cylinder device ab initio contains ccL of saturated refrigerant-134a.The piston is free to bowel movement and its mass is such that it maintains a crush of 800kPa on the refrigerant. The refrigerant is now het until its temperature rises to 500C. Calculate work done during the process. (3) A steam power whole works receives estrus from the furnace at a rate of 280GJ/h. conflagrate losses to the surrounding air from the steam as it passes by means of the components of the power plant is 8GJ/h. The waste heat transferred to the cooling water suppl y is 145GJ/h.Determine the net power out adorn of the plant and the thermal efficiency of the plant. (4) (1) Air enters an adiabatic nozzle steadily at 300 kPa, 200oC and 30 m/s. It leaves at 100 kPa and 180 m/s. The inlet area of the nozzle is 80 cm2. buzz off the mass flow rate through the nozzle, temperature at the exit of the nozzle and the area of the nozzle at its exit. (5)Air is heated in a circular duct by a 15 KW electric heating system placed internal the duct.Air enters the duct at 100 kPa and 170C with a mass flow rate of one hundred fifty m3/ min. If the heat lost from the duct to the purlieu is at a rate of 200 J/s, determine the exit temperature of the air. (6) move enters an adiabatic turbine at 10MPa and 5000C at a rate of 3 kg/s and leaves at 200kPa. If the power out vomit up of the turbine is 2MW, determine the temperature of the steam at the exit. push aside the changes in kinetic and potential energy.