Chapter 9, Problem 9.132EP

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. 10. Calculate the net work of the cycle.

I do not understand how to fix state 3 with the given information. Without knowledge of state 3 or 4s (the 4th state if the process were actually isentropic) I don't see how it's possible to get temperature or enthalpy of state 3.

CONDITIONS: ANSWERS: 1. Liquid at P = 17.5 Mpa and T= 200 C h = V= 2. Saturated liquid at T= 253.5 C S= 3. Steam with quality of 85 % at P = 6.1 Mpa h = 4. Dry steam at P = 8.25 Mpa 5. Steam at T=47 C, moisture = 2 % h = 6. Steam with P = 4.53 Mpa and T= 257 C 7. Steam at 17.398675 Mpa gage, h = T= 354.75 C V = 8. Steam at P = 19.0 Mpa, SH = 50 C 9. Saturated vapor at 783.4197 psig h = 10. Boiling Point of H20 in deg Celsius at atmospheric pressure of 0.122 Mpa T boiling point =

Explain the terms - thermo     - property  - state - process  - cycle

A steam at 15 bar specific volume is 0.1317 compressed reversibly to a pressure of 30 bar according to a law pvn=constant. The steam is then heated reversibly at constant volume until the pressure is 40 bar; the specific volume is then 0.08 m3/kg. reversible expansion according to a law pv2=constant restore the steam to its initial state. Sketch the cycle on p-v diagram and calculate : A- The value of n in the first process . B- The network .of the cycle

IMPORTANT: For problem solving items, start your solution by presenting the cycle in P-v and T-s diagrams. Label all points and mark the process where the heat is added and rejected. Also mark the area showing the net work of the cycle. The parameters of the initial state of one kilogram of air in the cycle of an internal combustion engine are o.095 MPa and 65 deg.C. The compression ratio is 12. Compare the values of the thermal efficiency for isobaric and isometric heat supply in the amounts of 820 kJ.

1. In a steam power plant steam enters the turbine at 6 bar and 400°C and is expanded isentropic ally to the condenser pressure of 0.1 bar. If the isentropic efficiency of the turbine is 80%, find the actual net work output and the thermal efficiency.

Q1: Select at least five different thermodynamic cycles/processes and make the P-v and T-v phase change diagrams. Also briefly explain the working of each cycle/process.

Only solve last 2 parts ok Problem 2 – Heat Pump Thermodynamic Analysis Refrigerant-134a enters the condenser of a residential heat pump at 800 kPa and 50°C at a rate of 35 L/min and leaves at 750 kPa subcooled by 3°C. The refrigerant enters the compressor at 200 kPa superheated by 3°C. Neglecting changes in kinetic and potential energy and any stray heat transfer, please answer the following.a. Create a schematic of the cycle, use the same numbers used in your textbook for the inlet and exit states of each device, and include the energy exchanges between the cycle devices and the surroundings.b. Sketch the cycle processes on a T-s diagram.c. Determine the isentropic efficiency of the compressor.d. Compute the rate of heat supplied to the heated room.e. Determine the COP of the heat pump.