for P= 36.29 bar,. h₁ = hg =2801.7 h4 = hf = 1057.5 k31kg hfg 1744.2 kJ/kg 43149 T = 244.2 C = 517.2K. .5,' = sg = 6.111 kJ/kg K '= 2.740 kJ/kg. 54= •We have s₁ =52. • 7.080 = S,' + Cvapor in (I+). 7.080 = 6.111+ 2.1 In (STA-2) T= 820.45 K. hh,+Cvapor CT, T₁) hi = 2801.7 + 2.1 (820.45-517.2) h₁ =3438.53 kJ/kg CS Scanned with CamScanner Cp water = 2.1 kJ/kg k 171 for hy Wp = √3 (P4-P3) 0.001065 (36.29-2.26) 30% To produce more power the upper management decided to modify the power plant by placing the stage 2 as a saturated liquid stage. The condenser site was planned to leave as it is with the same parameters. The flow rates stays the same. See the figure below for the data. Again, this an ideal case: S2-S1; S3=54. Boiler P1=36.29bar lin Draw: The T-S diagram of the cycle Turbine Condenser Pump P2=2.26 bar -2 Saturated vapor T6=? 6 Lour T5=15C 5 Cooling water 3 saturated liquid

Thermodynamics chapter 3

An open system is often referred to as control volume, which is a properly selected region in space in which mass and energy can flow across the boundaries as figure 1.2. The boundary of a open thermodynamic system is called the control surface Across the Boundaries E = Yes F 0 = Yes w =Yes Control surface ass YES W CONTROL VOLUME energy YES Figure 1.2. A cooling/heating radiator is an example of such a system – give two more examples of such a system.

%.00 @ 4G JO 100 I. Hw 1 Name: How many minutes you took ID. to solve this problem? Section: HW-1 Determine the magnitude and coordinate direction angles of the resultant force acting on the bracket. F = 450 N 45 60 F, = 600 N

A gas in piston cylinder assembly undergoes an expansion process for which the relation between the pressure and the volume is given by : PVn = Constant If the initial pressure is equal to 6 bar, the initial volume is equal to 0.1 m3 and the final volume is equal to 0.2 m3. Determine the work if n = 0. Answer 1 Determine the work if n = 1 Answer 2 Choose... 70) 15.8 J 60 kJ 580.9 J 41.6 kJ 250 kJ Choose... Choose... Invite to a call 8

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0.20 .l 12:42 景令60 ... KB/s laung mateilais, (C) nquius, (u) gases: 9. Suppose a person stated that heat cannot be transferred in a vacuum. How do you respond? 10. Review any standard text on thermodynamics and define: (a) heat, (b) internal energy, (c) work, (d) enthalpy. 11. Define and discuss ge. LIST OF WORKED EXAMPLES 1-1 Conduction through copper plate 1-2 Convection calculation 1-3 Multimode heat transfer 1-4 Heat source and convection 1-5 Radiation heat transfer 1-6 Total heat loss by convection and radiation PROBLEMS 1-1 If 3 kW is conducted through a section of insulating material 0.6 m2 in cross section and 2.5 cm thick and the thermal conductivity may be taken as 0.2 W/m - °C, compute the temperature difference across the material. 1-2 A temperature difference of 85°C is impressed across a fiberglass layer of 13 cm thickness. The thermal conductivity of the fiberglass is 0.035 W/m - °C. Compute the heat transferred through the material per hour per unit area. 1-3 A…

1. Air undergoes a polytropic expansion in a piston cylinder assembly. The initial temperature of the air is 800 K and the pressure is 2 MPa. The initial volume is 0.1 L in the cylinder. The final volume of the cylinder is 0.8 L. The final pressure is 100 kPa. a. What is the polytropic coefficient, n? b. What is the final temperature in K? c. What is the work done by the air on the piston cylinder assembly during this process in J? d. What is the heat transfer that takes place during this process in J? 1 V

Please provide simple explanation for each process temp.

Thermodynamics  Chapter 3  Complete the following table for water demonstrate clearly how you are getting the answers.