Refrigerant-12 enters the throttling valve of a heat pump system at 200 psia as a saturated liquid and leaves at 20 psia. Determine (a) the temperature drop across the throttling valve. (b) what is the expected rating of the valve in terms of its pressure drop?

Q: A commercial airliner is flying at an altitude where the temperature and pressure of the air are…

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Q: Refrigerant-134a enters the compressor of a refrigerator at 140kPa and - 10 degrees celsius at a…

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Q: 0.2 A condenser condenses 2700kg steam per hour while air leaks into It at 2.2kg/hr. The condensate…

A: Given: The steam condenses per hour, mw = 2700 kg/hour The air leakage into the condenser, ma = 2.2…

Q: PROBLEM 1 A 10 m³ rigid tank contains R-134a at 200 kPa and 20°C. Heat is added to the tank until…

A: The isochoric process is a thermodynamic process that takes place at a constant volume. It's also…

Q: A 6 stage centrifugal pump discharges 1200gpm of water at 1500 rpm with pressure drop of 600 psi.…

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Q: 15- R134a enters a compressor with a heat loss of 200 W as saturated steam at -24 ºC and after…

A: Solution : from the properties of R-134 a  @-24°C density of gas =5.76162 kg/m3

Q: What do you mean by intermediate-pressure steam? Is the pressure of the inlet the same as that of…

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Q: Refrigerant R-134a at 1.2 MPa and 75 °C is condensed to a saturated liquid in a condenser at…

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Q: A gas flows steadily through a rotary compressor at a temperature of 16 ⁰C, a pressure of 100 kPa,…

A: (a) The external work done per unit mass of gas can be calculated as follows: External work done per…

Q: A steam plant. the pressure levels are 10 kPa and 6000 kPa, and the steam leaves the turbine as…

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Q: A Stirling cycle operates with air with a volume flow rate of 0.5 m³/s at the beginning of…

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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.