1. Water vapor enters an adiabatic turbine at conditions of 9 MPa and 450°C with a mass flow rate of 2.35 kg/s and sale at 2.5 MPa. The turbine has 0.83 isentropic efficiency. Find a) The temperature at the outlet of the turbine, b) the work per unit mass of the turbine, and c) the working power of the turbine. Answers: a) T2 =288.4 °C b) WT =−278.25kJ / Kg c) ẆT =653.89 kW

Q: An insulated 8 m³ rigid tank contains air initially at 305K and 181 kPa. A 15 heater running off a…

A: Given, Volume V¯ = 8 m3 T1 = 305 K P1=181 kPa R=15 𝞨 Voltage V=108.1 V P2=362 kPa

Q: A  well insulated steam turbine receives steam at temperature T1 = 540 °C and pressure p1= 30 bar.…

A: A turbine is a thermodynamic equipment which converts the thermal energy of the steam into useful…

Q: A piston/cylinder system compresses saturated water vapor at 500 kPa to 2500 kPa, V₂=v₁/3 The system…

A: The initial pressure is The final pressure is The initial state is saturated vaporThe final volume…

Q: Refrigerant R-134a at 200 kPa and 90 ⁰C enters an adiabatic diffuser steadily with a velocity of 600…

A: Fluid= R134aInlet condition of R134a, P1=200 kPa, T1=90oC, V1=600 m/sExit condition of R134a, P2=10…

Q: An isentropic pump takes 2 kg/s of saturated liquid water at 150 kPa and pumps it to 10 MPa. Make…

A: a). T-S diagram of the Rankine cycle, At state 1. Inlet to the pump at constant pressure of 150KPa,…

Q: a) The exit velocity b) The inlet to exit area ratio c) The inlet exit density ratio

A: Given that: Refrigerant R134a is flowing inside the diffuser. The diffuser is adiabatic, hence net…

Q: 4) Air is compressed in a steady-state compressor from 150 kPa and 16 °C to 650 kPa. The mass flow…

A: Given: -At the compressor inlet -The air pressure P1= 150 kPa -The air temperature T1= 16oC -Mass…

Q: 2) A well-insulated, mixing chamber is configured to mix hot and cold water. The cold water is 10°…

A: The initial temperatures of cold and hot water are given as,   TC=10 °CTH=75 °C   On using of…

Q: Water vapor enters an adiabatic turbine at a pressure of 20 MPa and a temperature of 650 oC, with a…

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Q: The fan diameter of a household fan heater is 0.4 m. The heater takes the air at 22°C and 95 kPa and…

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Q: A small turbine operates using hydrogen gas, initially at 0.523 MPa and 480 K. The expansion…

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Q: b) What are the following quantities: V2, V3, V4, T2, T3, and T4? c) What is the work done in going…

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Q: 7. Consider heating 2 moles of steam from 1000 kPa and 200 °C to 500 °C at constant pressure.…

A: Given data: The number of moles of steam is n = 2 moles. The pressure of the steam is P = 1000 kPa.…

Q: Refrigerant R-134a at 200 kPa and 50 ⁰C enters an adiabatic diffuser steadily with a velocity of 140…

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Q: 5*. A steam turbine admits 50 kg/s of steam at 10 MPa and 450°C. The turbine operates with an…

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Q: b) Air with a volume of 0.031 m³ is trapped in a piston-cylinder assembly at a temperature of 40°C…

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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.