Chapter 9, Problem 9.95P

an air flow is brought from 20 degree celsius, 100 kPa to 1000 kPa, 330 degree celsius by an adiabatic compressor driven by 50 kW motor. what are the mass flow rate and the exit volume flow rate of air?

Water vapor in a steady-flow adiabatic turbine 9 MPa pressure and 600 ° C temperature, with 20 kPa pressure and 85 percent dryness comes out. Ignoring kinetic and potential energy changes, the turbine's 8 Calculate the required mass flow to generate MW power.

Steam is delivered to turbine at 5.4 MPa and 600 degree C. Before condensation at 31 degree C, steam is extracted for feed water heating at 0.6 MPa. The turbine exhaust is 60 degree C. the required values of some state point properties are tabulated below. 9. Calculate the total pump work of the cycle

A condenser (heat exchanger) brings 1 kg/s water flow at 10 kPa quality 95% to saturated liquid at 10 kPa. The cooling is done by lake water at 20 degree Celsius that returns to the lake at 30 degree Celsius. For an insulated condenser, find the flow rate of cooling water.

4. An evaporator has R-410A at -20°C and quality 80% flowing in. The exit flow is saturated vapor at -20°C. a. Consider the heating to be a reversible process and find the specific heat transfer from the entropy balance. (Answer: 48.7 kJ/kg) b. If the heat source was at -10°C and the inlet and outlet streams still have the same properties as in a), calculate the specific entropy generation? (Answer: 7.33 J/(kg K))

The steam rate to a turbine for variable output is controlled by a throttle valve in the inlet line.Steam is supplied to the throttle valve at 1,700 kPa and 225°C. During a test run, the pressure atthe turbine inlet is 1000 kPa, the exhaust steam at 10 kPa has a quality of 0.95, the steam flowrate is 0.5 kg/s, and the power output of the turbine is 180kW. 1. What are the heat losses from the turbine? 2. What would be the power output if the steam supplied to the throttle valve were expandedisentropically to the final pressure?

SHOW COMPLETE SOLUTION FAST ANSWERS WILL BE GIVEN UPVOTE.

A heat exchanger, shown below, is used to cool an air flow from 550 K to 250 K, both states at 1 MPa. The coolant is a water flow at 30 °C, 0.1 MPa. If the water leaves as saturated vapor, 0.1 MPa. 1 air 3 water

Helium at 660 K expands in a turbine to 420 K during which 77 kJ/kg of heat was lost to the surroundings which are at 27 °c. The pressure across the turbine was 6.0, What is the isentropic efficiency "%"?