A container equipped with a resistance heater and a mixer is initially filled with 3.6 kg of saturated water vapor at 120C. Now the heater and the mixture are turned on; the steam is compressed; and there is heat loss to the surrounding air. At the end of the process, the temperature and pressure of steam in the container are measured to be 300C and 0.5MPa. The net energy transfer to the steam during this process is

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Q: 6- A mass of 1.2 kg of air at 150 kPa and 12 C is contained in a piston- cylinder device. The air…

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Q: Estimate the quality, x of refrigerant-134a at 800 kPa and 0.025645 m3/kg

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Q: A piston-cylinder device initially contain 0.4 m3 of 1.8-kg saturated liquid water and steam mixture…

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A: For a polytropic process→T2T1=P2P1k-1k      →T2T1=1378.952689.4761.4-11.4     →T2=283.15×1.219     →…

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Q: rigid tank with a volume of 0.2 m3 contains saturated liquid water at 120 oC initially. Then 80 kg…

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Q: The phase of water at 10 MPa and 0.01 m3/kg is

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Q: In a well-insulated fixed-volume closed vessel, there is initially 5 kg of saturated liquid-vapor…

A: current quality of steam =0.25 required quality = 1.0

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.