Helium is to be compressed from 120 kPa and 310 K to 700 kPa and 430 K. A heat loss of 20 kJ/kg occurs during the compression process. Neglecting kinetic energy changes, determine the power input required for a mass flow rate of 90 kg/min

Q: Q 3) Steam enters an adiabatic turbine at 6 MPa and 500°C at a rate of 3 kg/s and leaves at 25 kPa.…

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Q: Air at 200 kPa and 950 K enters an adiabatic nozzle at low velocity and is discharged at a pressure…

A: The ideal temperature at the exit of the nozzle is

Q: Air enters a nozzle steadily at 2.21 kg/m3 and 30 m/s and leaves at 0.762 kg/m3 and 180 m/s. If the…

A: Given:- V1=30m/s A1=80cm2 V2=180m/s ρ1=2.21kg/m3 ρ 2=0.762kg/m3 To find:- a) Mass flow rate through…

Q: motor-pump system with 90% efficiency is designed to increase the pressure of was from 101kPa to 250…

A: Hh

Q: A rigid, 20-L steam cooker is arranged with a pressure relief valve set to release vapor and…

A: Given data as per the question Volume = 20 L The initial pressure of cooker = 175 kpa initial…

Q: Nitrogen gas is compressed from 80 kPa and 27°C to 480 kPa by a 10-kW compressor. Determine the mass…

A: Given: The initial pressure of the nitrogen gas in the compressor is P1=80 kPa The final pressure of…

Q: Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 10 MPa,…

A:

Q: Determine the work input and entropy generation during the compression of steam from 100 kPa to 1…

A: The initial pressure of the system P1 = 100 kPa The final pressure of the system P2 = 1000 kPa The…

Q: Steam is bled from this turbine at 1000 kPa and 200°C with a mass flow rate of 1 kg/s. The remaining…

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Q: A piston-cylinder device is divided into two compartments, A and B, containing steam at pressure P =…

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Q: Hot combustion gases enter the nozzle of a turbojet engine at 230 kPa, 627°C, and 60 m/s and exit at…

A: The pressure of gases at the entrance of nozzle P1 = 230 kPa The pressure of gases at the exit of…

Q: Air is compressed from an initial state of 100 kPa and 17°C to a final state of 600 kPa and 57°C.…

A: Given: The initial pressure of the air before compression is P1 = 100 kPa. The final pressure of the…

Q: Air at 100 kPa and 280°K is compressed steadily to 600 kPa and 400°K. The mass flow rate of the air…

A: Given data,  Potential energy and kinetic energy is neglected.  P1= 100 KPa,  P2= 600 KPa  T1=280 K…

Q: Helium is to be compressed from 120 kPa and 310 K to 700 kPa and 430 K. A heat loss of 20 kJ/kg…

A: This basic numerical is related with the thermodynamics subject and can be solved by using first law…

Q: An insulated piston–cylinder device contains 5 L of saturated liquid water at a constant pressure of…

A: Given: The volume of water, V = 5 L The pressure of water, P = 150 kPa The energy required to…

Q: Air at 27°C and 100 kPa is contained in a piston– cylinder device. When the air is compressed…

A: Given, T1 = 27°C = 27+273 = 300 K P1 = 100 kPa T1 = 27°C = 27+273=300°K W = 1000 kJ P2 = 600 kPa m=?…

Q: Refrigerant-134a at 140 kPa and –10°C is compressed by an adiabatic 1.3-kW compressor to an exit…

A: The properties of refrigerant-134a at 140 kPa and -10 degree centigrade temperature are taken from…

Q: 1) Helium is to be compressed from 150 kPa and 300 K to 800 kPa and 500 K. A heat loss of 20 kJ/kg…

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Q: In a power plant, the inlet water has a velocity of 100 ft/s and an elevation of 80 ft above the…

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Q: Refrigerant-134a at 140 kPa and –10°C is compressed by an adiabatic 0.5-kW compressor to an exit…

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Q: super heated steam enters an adiabatic gas turbine at 12 bar and 500 °C and leaves at 400 Kpa and…

A: To determine the required values in the above question, we must use two concepts:  1. Continuity…

Q: Air is compressed by an adiabatic compressor from 95 kPa and 27°C to 600 kPa and 277°C. Assuming…

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Q: Air is expanded in an adiabatic turbine of 90 percent isentropic efficiency from an inlet state of…

A: Given: The efficiency of is ƞ=0.9. The inlet and outlet pressures are P1=2800 kPa and P2=100 kPa.…

Q: Nitrogen gas is compressed from 80 kPa and 27°C to 480 kPa by a 10-kW compressor. Determine the mass…

A: The mass flow rate can be found from the compressor power and the work of compression as follows:

Q: A rigid, insulated tank that is initially evacuated is connected through a valve to a supply line…

A: Write the properties of helium. Write the expression of the specific volume. Write the expression…

Q: The work required for compressing gas from an initial condition of 100 kPa and 300K to a final…

A: Heat supplied is the heat supplied for power generation or for the useful work of a machine. This…

Q: A rigid tank is divided into two equal parts by a partition. One part of the tank contains 3 kg of…

A:

Q: What is the minimum internal energy that steam can achieve as it is expanded adiabatically in a…

A: Given: The initial pressure of the steam, P1 = 1500 kPa The final pressure of the steam, P2 = 100…

Q: Nitrogen gas is compressed from 80 kPa and 27°C to 480 kPa by a 10-kW compressor. Determine the mass…

A: Given: The initial pressure of the nitrogen gas is P1=80 kPa. The final pressure of the nitrogen gas…

Q: The work required for compressing a gas from an initial condition of 100 kPa and 300 K to a final…

A: Given data: Let us consider that the nozzle is adiabatic.

Q: Heat is transferred at a rate of 2 kW from a hot reservoir at 800 K to a cold reservoir at 300 K.…

A: Given Data Hot reservoir temperature TH=800K Cold reservoir temperature =TL=300K Q=2KW

Q: A rigid tank is divided into two equal parts by a partition. One part of the tank contains 5.5 kg of…

A: Here, the mass of the compressed liquid water in first part of the tank (where the compressed liquid…

Q: Ten grams of computer chips with a specific heat of 0.3 kJ/kg·K are initially at 20°C. These chips…

A: Entropy is defined as the degree of randomness of a molecule and the entropy change of the…

Q: A water stream at 1 MPa and 160°C is mixed with another stream at 1 MPa and 300°C. If the mass flow…

A: To solve the given question, energy conservation will be applied. The change in enthalpy of the…

Q: Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 10 MPa, 450…

A: The change in the kinetic energy can be determined as,

Q: Helium is to be compressed from 105 kPa and 295 K to 700 kPa and 460 K. A heat loss of 15 kJ/kg…

A: Given Pi = 105 kPa Ti = 295 K Pf = 700 kPa Tf = 460 K Qab = 15 kJ/Kg m' = 60 Kg/min To find Power…

Q: Argon gas enters an adiabatic compressor at 14 psia and 75F with a velocity of 60 ft/s, and it exits…

A: Data: Initial temperature,T1= 750F Initial pressure,P1 = 14 psia Final pressure, P2 =200 psia…

Q: Steam flows steadily through an adiabatic turbine. The inlet conditions of the steam are 10 MPa,…

A:

Q: Refrigerant-134a at 140 kPa and –10°C is compressed by an adiabatic 1.3-kW compressor to an exit…

A: find out the final enthalpy by using R134a table…

Q: Water at 20 psia and 500F enters a mixing chamber at a rate of 7 lbm/s where it is mixed steadily…

A:

Q: Refrigerant-134a enters an adiabatic compressor as saturated vapor at 30 psia at a rate of 20 ft3…

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Q: Refrigerant-134a enters a diffuser steadily as saturated vapor at 800 kPa with a velocity of 120…

A: Given data as per question Saturated vapour pressure =800 kpasaturated vapour velocity =120 msLeaves…

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.