Chapter 8, Problem 8.88P

A geothermal powerplant uses steam that enters  a nozzle @ 973.15 K at 300 kpa under a velocity of having 20 m/sec, such that the steam exits at  200 kpa. The operator provides the process that is adiabatic and reversible. Calculate the ff. a. going out velocity of steam b. the going out temperature c. the sp. enthalpy at going out.

Thermodynamics sketch and label the turbine. Sketch and label the process on a T-s diagram also mentions all numbers on the process please. Thanks 7.56 A steam turbine has an inlet of 2 kg/s water at 1000 kPa, 400°C with velocity of 15 m/s. The exit is at 100 kPa, 150°C and very low velocity. Find the power produced and the rate of entropy generation.

Question 3: Superheated steam enters a turbine at 7 MPa, 550°C, and exits at 150kPa a. Draw the system. b. If the process is reversible adiabatic (isentropic), find the final temperature (T2), the final enthalpy (h2,) of the steam, and do the energy balance to calculate the turbine work (Wts). c. Using entropy balance, show that Sgen for the above process is 0. d. If the isentropic efficiency is 85%, find the actual final temperature (T23) and calculate Sgen? e. Plot process in (b) and (d) on a Ts diagram with proper labelling.

3. An adiabatic compressor takes argon from 100 kPa, 300 K to 2000 kPa. The compressor efficiency is 80%. (a) Find the outlet temperature (K) and the work (kJ/kg) (b) Find the entropy generation (kJ/kg-K)

7.134E R-134a at 90 F, 125 psia is throttled in a steady flow to a lower pressure, so it comes out at 10 F. What is the specific entropy generation?

A 5 m3rigid tank has propane at 500 kPa, 700 K and connected by a valve to another tank of 0.7 m3with propane at 350 kPa, 600 K. The valve is opened and the two tanks come to a uniform state at 350 K. What is the final pressure?For propane R = 0.1886 kJ/kgK

A refrigerator compressor receives R-134a at a rate of 0.08 kg/s at -10 C, 150 kPa and delivers it at 1000 kPa, , 50 C. The input power to the compressor is 3.5 kW. The compressor is cooled with atmospheric air coming in at 25 C and leaving at 32 C. Determine the mass flow rate of airTake the air as an ideal gas with constant specific heat Cpair . That ish4-h3 = Cpair (T4-T3)

Air in an ideal diesel is compresses from 8 liters to 0.15 and then expands during the constant pressure heat addition process to 0.3 L. Under cold air standard conditions, find the thermal efficiency.

A compressor receives R-410A as saturated vapor R-410A at 400 kPa and brings it to 2000 kPa, 60°C. Then a cooler brings it to saturated liquid at 2000 kPa (see Fig. below). Find the specific compressor work and the specific heat transfer in the cooler? A eccoi = Compressor Compressor section Cooler section