A process to liquify nitrogen gas (N2) from 300K, 200atm to 98.69K (saturation temperature) and 7atm is to be designed. The specific enthalpy of the saturated liquid and saturated vapor at 7atm are, Hl = 74.7 J/g and Hv = 239.2 J/g respectively. Consider first using a throttle valve alone. Sketch the path corresponding to the conditions given above on the T-S diagram on the next page. Is it possible to achieve liquefaction by a throttle valve alone? State and justify your reasoning.

Q: Problem 3. Consider a shower that mixes hot and cold saturated liquid water to maintain a steady…

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Q: an airstream with a velocity of 650 m/s static pressure of 222 kpa and a static temperature of 452 k…

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Q: Air (diatomic, MW = 28.8664 g/ mol) in an automobile tire is maintained at a pressure of 220 ka…

A: The initial mass flow rate. Given: The gauge pressure in the tire is Pgauge=220 kPa. The atmospheric…

Q: Can you provide the step by step solution how to get the answers? Steam flows adiabatically through…

A: Initial Pressure  p1=1517 KPa=1517000 Pa Final Pressure at the  p2=965 Kpa=965000 Pa Initial…

Q: Define specific heats. Differentaite between specific heats at constant pressure and constant…

A: Specific heats: The amount of heat required per unit mass required to raise the temperature by one…

Q: mhot Thot = 75°C Tout-? %3D mcold Tcold = 18°C Hot and cold stream of water are mixing together as…

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Q: PXV=RXT where v=specificvolume R idealgasconstantfwater-461.5 J/kg.K Therefore V= RXT P 461.5×623 V=…

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Q: In mixing tanks systems, the water comes in at a rate of 4L/min in Tank A. This tank contains 500L…

A: Given

Q: Find the specific enthalpy, h, of water at 500kpa, s= 3.65 kJ/kg*K

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Q: An automobile cylinder has a minimum volume (top dead center) of 50 cm^3. It’s maximum volume…

A: Find the temperature at the top dead centre

Q: Water enters a heat exchanger operating stably at P = 10 bar and T = 80oC, given that the outlet is…

A: GivenP1=10 bar T=80oCAt outletP2=10 bar  saturated steam

Q: Ten kmol per hour of air is throttled from upstream conditions at 25°C and 10 bar to a downstream…

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Q: 12.5 Air initially at 50 psia and 660°R expands to atmospheric pressure. The process by which this…

A: Given Data: p1=50 psiaT=660oRpV1.3=Cp2=14.7 psia   To Find: (a) Final temperature. (b) Change in…

Q: You are designing a system to mix fuel and air prior to ignition in an engine. Do you want the flow…

A: For designing the system to mix fuel we would want the flow to be turbulent because the fuel needs…

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.