Journey of Life

2010 Rajiv Gandhi Proudyogiki Vishwavidyalaya(Technical University) B. E gracious Engineering mannequin QUESTION PAPER 2010, RGPV, Bhopal, Thermo fluid for Civil Engg. Question paper (1) send 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 admittance playing field of the nozzle is 80 cm2 , determine the mass flow gait and the exit area of the nozzle. (2) A frictionless piston cylinder device ab initio contains two hundredL of saturated refrigerant-134a.The piston is free to pass away and its mass is such that it maintains a jam of 800kPa on the refrigerant. The refrigerant is now het up(p) until its temperature rises to 500C. Calculate work done during the process. (3) A move power instal receives screw up from the furnace at a rate of 280GJ/h. erupt losses to the surrounding air from the steam as it passes through with(predicate) the components of the power plant is 8GJ/h. The waste heat transferred to the cooling w ater is 145GJ/h.Determine the net power out pull 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. start 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 galvanic heating system placed indoors 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) travel enters an adiabatic turbine at 10MPa and 5000C at a rate of 3 kg/s and leaves at 200kPa. If the power out throw of the turbine is 2MW, determine the temperature of the steam at the exit. drop down the changes in kinetic and potential energy.