A steam turbine operates with 2 MPa and 400°C steam at its inlet and saturated vapor at 40°C at its exit. The mass flow rate of the steam is 25 kg/s, and the turbine produces 12 MW of power. Determine the rate at which heat is lost through the casing of this turbine. (Answer: 4872.5 kW)

Q: Q 3) Steam enters an adiabatic turbine at 6 MPa and 500°C at a rate of 3 kg/s and leaves at 25 kPa.…

A:

Q: An adiabatic air compressor is to be powered by a direct-coupled adiabatic steam turbine that is…

A: Given Data:

Q: In a food processing industry, steam and water are mixed to produce a continuous supply of hot…

A: Given data: m1=13 kg/sh1=50 kJ/kgm2=2 kg/sh2=2670 kJ/kgQloss=780 W Need to determine the temperature…

Q: Nitrogen gas is compressed from 80 kPa and 27°C to 480 kPa by a 10-kW compressor. Determine the mass…

A: Given: The initial pressure of the nitrogen gas in the compressor is P1=80 kPa The final pressure of…

Q: Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 10 MPa,…

A:

Q: Steam enters a nozzle at 400°C and 800 kPa with a velocity of 10 m/s, and leaves at 300°C and 200…

A: Write the properties of steam at 800 kPa and 400°C. Write the properties of steam at 200 kPa and…

Q: 3-kg of helium gas at 100 kPa and 27C are adiabatically compressed to 900 kPa. If the isentropic…

A: Given data as per question Mass of helium gas = 3 kg Initial Pressure of helium = 100 kpa Final…

Q: Refrigerant-134a enters an adiabatic compressor as saturated vapor at 160 kPa at a rate of 2 m3 /min…

A: Given Data: The refrigerant used is R-134a. The inlet pressure at the compressor is p1= 160 kPa.…

Q: Steam at 100 psia and 650F is expanded adiabatically in a closed system to 10 psia. Determine the…

A: Given data as per question Steam pressure at entry= 100 psia Temperature = 650 F Steam pressure at…

Q: In a power plant, water vapor with a flow rate of 35 kg / s enters the adiabatic turbine at a…

A:

Q: Water is heated in an insulated, constant-diameter tube by a 7-kW electric resistance heater. If the…

A: Given: The water enters the heater is T1 = 20 °C. The water leaves the heater is T2 = 75 °C. The…

Q: Nitrogen at 120 kPa and 30°C is compressed to 600 kPa in an adiabatic compressor. Calculate the…

A: The initial temperature of the nitrogen is T1=30 °C. The initial pressure of the nitrogen is P1=120…

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: Steam enters an adiabatic turbine steadily at 5 MPa and 500 °C and leaves at 100 kPa and 200 °C. The…

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Q: Refrigerant-134a enters an expansion valve at 1200 kPa as a saturated liquid and leaves at 200 kPa.…

A: Given data P1=1200 KPAP2=200 KPaT0=25 °c=298 K

Q: 3. Air enters the compressor of a gas-turbine plant at ambient conditions of 100 kPa and 25°C with a…

A:

Q: super heated steam enters an adiabatic gas turbine at 12 bar and 500 °C and leaves at 400 Kpa and…

A: To determine the required values in the above question, we must use two concepts:  1. Continuity…

Q: Steam enters a turbine steadily at 7 MPa and 600°C with a velocity of 60 m/s and leaves at 25 kPa…

A: Given : The condition at inlet 1: The condition at exit 2:

Q: Nitrogen gas is compressed from 80 kPa and 27°C to 480 kPa by a 10-kW compressor. Determine the mass…

A: The mass flow rate can be found from the compressor power and the work of compression as follows:

Q: A 5-ft3 rigid tank initially contains refrigerant-134a at 60 psia and 100 percent quality. The tank…

A: The properties of refrigerant 134a at 60 psia and 100 percent quality are: The enthalpy of…

Q: Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 0.7…

A: Given data: *The saturated vapour pressure of the refrigerant is P=100 kPa. *The flow rate of the…

Q: Air enters the compressor of a gas-turbine plant at ambient conditions of 100 kPa and 25°C with a…

A: Given data: Inlet temperature of air, T1 = 250C = 298 K Exit temperature of air, T2 = 3470C = 620 K…

Q: Water at 80°F and 20 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia.…

A: Given data T1=80 °FP1=20 psiaP2=20 psia

Q: Air enters the compressor of a gas-turbine plant at ambient conditions of 100 kPa and 25 °C with a…

A:

Q: Air enters the compressor of a gas-turbine plant at ambient conditions of 100 kPa and 25°C with a…

A:

Q: A 5-ft3 rigid tank initially contains refrigerant-134a at 60 psia and 100 percent quality. The tank…

A: Subscript 1 is used for the initial properties inside the tank, subscript 2 is used for the final…

Q: Liquid water at 200 kPa and 20 degress celcius is heated in a chamber by mixing it with superheated…

A: Draw the schematic diagram of the mixing chamber as shown in Figure (1).

Q: Steam enters an adiabatic turbine at 2MPa and 250°C and expands to 25 kPa with an isentropic…

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Q: Air enters the compressor of a gas turbine plant at ambient conditions of 100 kPa and 25 ⁰C with a…

A:

Q: A water stream at 1 MPa and 160°C is mixed with another stream at 1 MPa and 300°C. If the mass flow…

A: To solve the given question, energy conservation will be applied. The change in enthalpy of the…

Q: Air enters the compressor of a gas turbine plant at ambient conditions of 100 kPa and 25 ⁰C with a…

A:

Q: Saturated refrigerant-134a vapor at 15 psia is compressed reversibly in an adiabatic compressor to…

A: Given data P1=15 psiaP2=80 psia

Q: Steam at 100 psia and 650°F is expanded adiabatically in a closed system to 10 psia. Determine the…

A: At state 1 P1 = 100 psia T1 = 650°F (from steam table) u1 = 1233.7 Btu/lbm S1 = 1.7816 Btu/lbm-K…

Q: A 0.05-m3 rigid tank initially contains refrigerant134a at 0.8 MPa and 100 percent quality. The tank…

A: At state 1 (Refrigerant-134a table) 0.8Mpa  v1=0.025645 m3/Kg   At state 2 1.2Mpa v2=0.0008935 m3/Kg…

Q: Steam at 3 MPa and 400°C is expanded to 30 kPa in an adiabatic turbine with an isentropic efficiency…

A: Work done can be determined by using Steady flow energy equation Values from steam table at given…

Q: Refrigerant-134a enters an adiabatic compressor as saturated vapor at 100 kPa at a rate of 0.7 m3…

A: The pressure of the saturated vapour at the inlet of the compressor is P1=100 kPa. The volume flow…

Q: Nitrogen gas is compressed from 80 kPa and 27°C to 480 kPa by a 10-kW compressor. Determine the mass…

A: Given: The initial pressure of nitrogen gas is P1=80 kPa. The final pressure of nitrogen gas is…

Q: Steam enters an adiabatic turbine at 800 psia and 900F and leaves at a pressure of 40 psia.…

A: Given data: *The temperature of the steam at the entrance of the turbine is Ti=900 F. * The pressure…

Q: Air enters the compressor of a gas turbine plant at ambient conditions of 100 kPa and 25 ⁰C with a…

A:

Q: Determine the isentropic efficiency of the rotary engine and  the second law efficiency of therotary…

A:

Q: Air enters the compressor of a gas turbine plant at ambient conditions of 100 kPa and 25 ⁰C with a…

A:

Q: Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 30 m/s and leaves at 100 kPa and 180…

A:

Q: Air enters an adiabatic nozzle steadily at 300 kPa, 200°C, and 45 m/s and leaves at 100 kPa and 180…

A: a)  The mass flow rate                       m=ρV1=P1A1v1RT1=300×110×10-4×450.287×473=1.09 kgs b)…

Q: Steam enters a nozzle at 400°C and 800 kPa with a velocity of 10 m/s, and leaves at 375°C and 400…

A: Solution:T1 = 400°C , P1 = 800 kPa   , V1 = 10 m/sT2 = 375°C , P2 = 400 kPa   , Q˙ = -25 kwA1 = 800…

Q: Refrigerant-134a is compressed steadily from the saturated vapor state at 140 kPa to 1.2 MPa and 60…

A:

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.