W НЕ

Q: A chiller cools liquid water for air-conditioning purposes. Assume that 2.5 kg/s water at 20°C, 100…

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Q: Q1/Water enters a boiler at (323°K & 5 Mpa), and leaves as steam at (673°K & 5 Mpa). The heat…

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Q: A steam turbine has an inlet of 2 kg/s water at 1000 kPa, 350°C and velocity of 15 m/s. The exit is…

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Q: 4.25 A steam turbine has an inlet of 3 kg/s water at 1200 kPa and 350°C with a velocity of 15 m/s.…

A: Given dataThe mass flow rate of the water, The inlet pressure of the water, (P1)=1200 kPaThe inlet…

Q: How much work was required (kJ)?

A: take properties from steam table here state 1 is super heated state and 2 is sub cooled state.so…

Q: How much entropy is transferred if 200 W of thermal energy are transferred to a heat sink at 300K?

A: Consider the schematic diagram of the thermal reservoir (Heat sink) extracting heat.

Q: A steam turbine has an inlet of 3 kg/s water at 1200 kPa and 350°C with a velocity of 15 m/s. The…

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Q: A piston/cylinder receives (control mass system) R-134a at 300 kPa and compresses it in a process…

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Q: A fraction of some power to a motor (1), 2 kW, is turned into heat transfer at 500 K (2) and then it…

A: The exergy of an amount of heat transfer equals the possible work that can be extracted. This is the…

Q: In an engine, the air in a piston-cylinder arrangement has a compression ratio of 0.1. It starts…

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Q: Through a combustion of a fossil fuel at 35000C, an engine receives energy at a rate of 3000Btu/s to…

A: Given : The energy rate of engine is The work produced by the steam is The temperature of fossil…

Q: 1 kg/s steam enters the turbine at 2.5MPa and 500C while leaving at 10kPa with 89% quality. The pump…

A: Answer: (a) The turbine work output is 1142.03 kW. (b) The heat added in the boiler is 3268.4751 kW.…

Q: Steam expands isentropically from 2 MPa and 375 o C to a final temperature of 95 o C. Find the final…

A: Given:

Q: A tank of water has a shaft rotating at 60 rpm with a torque of 40 N-m that is stirring the water. A…

A: Here,  Shaft rpm = N = 60 rpm Shaft Torque = T = 40 N-m Heater Voltage = V = 120 V Heater Current =…

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.