Steam enters a turbine steadily at 3 MPa and 450°C at a rate of 8 kg/s and exits at 0.2 MPa and 150°C. The steam is losing heat to the surrounding air at 100 kPa and 25°C at a rate of 300 kW, and the kinetic and potential energy changes are negligible. Determine the exergy destroyed.

Q: Refrigerant-134a at 140 kPa and –10°C is compressed by an adiabatic 0.5-kW compressor to an exit…

A: Given Data: Refrigerant type: R-134a The temperature of refrigerant at the entry of compressor is T1…

Q: A 0.04-m3 tank initially contains air at ambient conditions of 100 kPa and 22°C. Now, a 15-L tank…

A: Given Data: The volume of the tank is: Va1=0.04 m3. The initial pressure of the air is: Pa1=100 kPa…

Q: An insulated piston–cylinder device initially contains 20 L of air at 140 kPa and 27°C. Air is now…

A: Given Data: The initial volume of air is: V1=20L The initial pressure is: P1=140 kPa The initial…

Q: Steam enters an adiabatic turbine steadily at 7 MPa, 500°C, and 45 m/s and leaves at 100 kPa and 75…

A: Given, P1=7 MPa T1=500°C V1= 45m/s P2 = 100 kPa=0.1Mpa V2= 75 m/s W=5 MW=5000 KW ηisentropic=…

Q: A rigid tank contains an ideal gas at 40°C that is being stirred by a paddle wheel. The paddle wheel…

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Q: A 30-kg iron block initially at 280°C is quenched in an insulated tank that contains 100 kg of water…

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Q: Hot combustion gases enter the nozzle of a turbojet engine at 250 kPa, 650°C, and 70 m/s and exit at…

A: Given data as P1=250 kPaT1=650 °C=923 Kv1=70 m/sP2=80 kPaT2=420 °C=693 Km˙=1.2 kg/sQloss=90 kW=90000…

Q: Steam enters an isentropic turbine at 4 MPa. X percent (by mass) of the steam exits the turbine at…

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Q: Steam enters an adiabatic turbine steadily at 4 MPa and 500°C at a rate of 6 kg/s and exits at 0.3…

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Q: fluid enters a device steadily at 35 m/s, 200 kPa and 65C and exits at 240 m/s and 95 kPa. The heat…

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Q: A piston-cylinder device contains 0.05 kg of steam at 1 MPa and 300°C. Steam now expands to a final…

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Q: A heat engine receives heat from a source at 1200 K at a rate of 500 kJ/s and rejects the waste heat…

A: Given data :TH= 1200 K              TL= 300 KQH= 500 KWW= 180 KW

Q: Steam expands in a turbine steadily at a rate of 11.11 kg/s, entering at 8 MPa and 500°C and leaving…

A: The mass frow rate of the turbine, The inlet pressure to the turbine, (P1)=8 MPaThe inlet…

Q: Devices can be combined to perform a variety of tasks. An adiabatic compressor, with air as the…

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Q: Refrigerant-134a at 140 kPa and –10°C is compressed by an adiabatic 1.3-kW compressor to an exit…

A: The properties of refrigerant-134a at 140 kPa and -10 degree centigrade temperature are taken from…

Q: A 12-kg solid whose specific heat is 2.8 kJ/kg·°C is at a uniform temperature of –10°C. For an…

A: Given: The mass of the solid is m=12 kg. The specific heat of the solid is C=2.8 kJ/kg-°C. The…

Q: A rigid tank is divided into two equal parts by a partition. One part of the tank contains 1.5 kg of…

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Q: A piston-cylinder device contains 8 kg of refrigerant- 134a at 0.7 MPa and 60°C. The refrigerant is…

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Q: Refrigerant-134a at 140 kPa and –10°C is compressed by an adiabatic 0.5-kW compressor to an exit…

A:

Q: A 50-kg iron block and a 20-kg copper block, both initially at 80°C, are dropped into a large lake…

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Q: Refrigerant-134a is converted from a saturated liquid to a saturated vapor in a closed system using…

A: The destruction exergy in case of 100 kPa is written as,   xdes=T0s2-s1-hevapTsOn using table…

Q: Oxygen gas is compressed in a piston–cylinder device from an initial state of 12 ft3 /lbm and 75°F…

A: Given data: The characteristic gas constant for oxygen is The specific heat at constant volume for…