Question

In: Physics

A current of 5.20 kg / s of water vapor at 40.0 bar and 320 °...

A current of 5.20 kg / s of water vapor at 40.0 bar and 320 ° C is passed to an adiabatic turbine. The outlet pressure is 20.0 bar. The isentropic efficiency of the turbine is 97.4%. What is the work, in kW?

(Uses 3 significant figures)

Solutions

Expert Solution

At turbine inlet (State 1 )

From steam tables

At turbine exit (state 2)

At 20 bar

The T-S diagram of the process is given below

@ 20 bar < s1 So state 2 will be in super heated region. Now we need to calculate the temp. at state 2

and

Please like it , if you have any issue mention in comment

genius_generous answered 1 year ago

Next > < Previous

Related Solutions

Saturated water vapor has a flow rate of 1.5 kg/s and a pressure of 0.51 bar....

Saturated water vapor has a flow rate of 1.5 kg/s and a pressure of 0.51 bar. The vapor is to be completely condensed to saturated liquid in the shell of a shell-and-tube heat exchanger. In this case, the water vapor enters and the water exits at the same temperature, which represents a case with infinitely high m_dot * Cp for this condensing steam application. On the tube side, city water is used as the cold fluid. The city water enters...

Water vapor at 5 bar, 320°C enters a turbine operating at steady state with a volumetric...

Water vapor at 5 bar, 320°C enters a turbine operating at steady state with a volumetric flow rate of 3 m3/s and expands adiabatically to an exit state of 1 bar, 160°C. Kinetic and potential energy effects are negligible. Determine for the turbine: (a) the power developed, in kW. (b) the rate of entropy production, in kW/K. (c) the percent isentropic turbine efficiency.

Water vapor at 5 bar, 320°C enters a turbine operating at steady state with a volumetric...

Water vapor at 5 bar, 320°C enters a turbine operating at steady state with a volumetric flow rate of 3 m3/s and expands adiabatically to an exit state of 1 bar, 200°C. Kinetic and potential energy effects are negligible. Determine for the turbine: (a) the power developed, in kW. (b) the rate of entropy production, in kW/K. (c) the percent isentropic turbine efficiency.

Water vapor enters a subsonic diffuser at 0.5 bar, 175 °C, and 200 m/s. The diffuser...

Water vapor enters a subsonic diffuser at 0.5 bar, 175 °C, and 200 m/s. The diffuser inlet is 100 cm2. During passage through the diffuser, the fluid velocity is reduced to 50 m/s, pressure increases to 1.0 bar and heat transfer to the surroundings is 0.5 kg/kJ. Determine a) the final temperature, b) the mass flow rate [kg/s] and c) the outlet area [cm2]

A 91.0-kg fullback running east with a speed of 5.20 m/s is tackled by a 95.0-kg...

A 91.0-kg fullback running east with a speed of 5.20 m/s is tackled by a 95.0-kg opponent running north with a speed of 3.00 m/s. (a) Explain why the successful tackle constitutes a perfectly inelastic collision. (b) Calculate the velocity of the players immediately after the tackle. magnitude m/s direction ° north of east (c) Determine the mechanical energy that disappears as a result of the collision. J (d) Account for the missing energy.

Water vapor at 5 MPa, 320°C enters a turbine operating at steady state and expands to...

Water vapor at 5 MPa, 320°C enters a turbine operating at steady state and expands to 0.1 bar. The mass flow rate is 2.52 kg/s, and the isentropic turbine efficiency is 92%. Stray heat transfer and kinetic and potential energy effects are negligible. Determine the power developed by the turbine, in kW.

Ammonia reacts with diatomic oxygen to form nitric oxide and water vapor: 40.0 g NH3 and...

Ammonia reacts with diatomic oxygen to form nitric oxide and water vapor: 40.0 g NH3 and 50.0 g O2 are allowed to react according to the following equation: 4NH3 + 5O2 à 4NO + 6H2O 4. What is the maximum number of grams of nitric oxide that can be produced in this experiment? a. 50.0 g b. 70.6 g c. 37.5 g d. 40.0 g e. 58.6 g

A 0.060-kg tennis ball, moving with a speed of 5.20 m/s , has a head-on collision...

A 0.060-kg tennis ball, moving with a speed of 5.20 m/s , has a head-on collision with a 0.085-kg ball initially moving in the same direction at a speed of 3.36 m/s . Assume that the collision is perfectly elastic. Part A: Determine the speed of the 0.060-kg ball after the collision. Part B: Determine the speed of the 0.085-kg ball after the collision.

A mass of 5 kg of saturated liquid vapor mixture of water is contained in a...

A mass of 5 kg of saturated liquid vapor mixture of water is contained in a piston cylinder device at 100 kPa, initially 2 kg of water is in the liquid phase and the rest is in the vapor phase.Heat is now transferred to the water and the piston which is resting on a set of stops, starts moving when the pressure in side reaches 200 kPa, heat transfer continues until the total volume increases by 20%, determine a. the...

A tank contains 21 kg of dry air and 0.3 kg of water vapor at 30°C...

A tank contains 21 kg of dry air and 0.3 kg of water vapor at 30°C and 100 kPa total pressure. Determine (a) The specific humidity (b) The relative humidity (c) The specific enthalpy of the mixture in the tank as (kJ/kg-mixture) (calculate by hand) (d) The specific enthalpy of the mixture in the tank as (kJ/kg-dry air) (calculate by hand) (e) Explain (in 1-2 sentences) the difference between the values in c and d – which value agrees with...

Subjects