Question 1 This question requires the use of the Thermodynamic Property Tables supplied as additional material. A saturated mixture of 2 kg of liquid water and 0.7 kg of steam is heated at a constant pressure of 40 bar until its temperature reaches 300 °C. (a) Evaluate the temperature and the dryness fraction at the start of the process. (b) Given that the heat transfer to a system during a constant pressure process is equal to the increase in enthalpy of the system, calculate the heat transfer to the system in the process described above. (c) Finally, the system undergoes an isentropic process such that it finishes as a saturated liquid. Evaluate the temperature at this final state. (d) Sketch the two processes on a plot of temperature.v.specific entropy. Include on your sketch the two-phase region and the isobar passing through states 1 and 2.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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10:19 Wed 9 Aug
5 of 32
[bar]
0.006112 0.01 206.1
0.010
0015
0.020
0.025
0.030
0.035
0.040
0.045
0.050
0.12
014
0.16
018
0.20
022
024
0.26
0.28
0.30
0.36
0.38
0.42
0.44
0.46
[°C] [m³/kg]
0.55
75.9
87.08
67.01
54.26
45.67
[kJ/kg]
qmplus.qmul.ac.uk
Of 2375
h₂
her
[kJ/kg]
Saturated Water and Steam
2429
ha
2501 2501
2485
2470 2525
5460 2522
2451 2539
2545
2550
2554
2558
2561
2567
10³
[kJ/kg] [kJ/kg] [bar] [m²] * [m³/kg] * [kg] *10³[Nm] * [kJ/kg]
[bar] [m³/kg] × 10² = 0.006112 × 0.0010002 × 10² = 0.0006112
Sq
Of
9.155
8 868
0.196 2621
0.261 8.467
0.312 8.330
Sf
[kJ/kg K]
9322
0.534 0.444 8.570
0.422 8051
8.472
0.451 7.980 8.431
0.476 7.918
8.394
0 500 7860
0.500
7.600
0.541 7.760
0.559 7.715
0.576 7674
0.608
0.622 7.564
0.636 7531
0.649 7.500
0904
4004
7213
7140
7075
6913
6866
6.823
9.155
8.974
9 927
8 723
8.642
6709
6.675
6.643
6.500
8. 301
8274
8.250
0.221
8. 167
8.149
1.252 6163
1.270 6.124
1.287
9.021
7985
791
1054
6.582
1.067 6.554
7621
1.079 6.528 7607
1.091 6.502
1119 6442 7561
1145
6.386 7531
1 169
6.335 7.504
1.192 6.286 7478
1.213 6.243
7.456
97%
Transcribed Image Text:10:19 Wed 9 Aug 5 of 32 [bar] 0.006112 0.01 206.1 0.010 0015 0.020 0.025 0.030 0.035 0.040 0.045 0.050 0.12 014 0.16 018 0.20 022 024 0.26 0.28 0.30 0.36 0.38 0.42 0.44 0.46 [°C] [m³/kg] 0.55 75.9 87.08 67.01 54.26 45.67 [kJ/kg] qmplus.qmul.ac.uk Of 2375 h₂ her [kJ/kg] Saturated Water and Steam 2429 ha 2501 2501 2485 2470 2525 5460 2522 2451 2539 2545 2550 2554 2558 2561 2567 10³ [kJ/kg] [kJ/kg] [bar] [m²] * [m³/kg] * [kg] *10³[Nm] * [kJ/kg] [bar] [m³/kg] × 10² = 0.006112 × 0.0010002 × 10² = 0.0006112 Sq Of 9.155 8 868 0.196 2621 0.261 8.467 0.312 8.330 Sf [kJ/kg K] 9322 0.534 0.444 8.570 0.422 8051 8.472 0.451 7.980 8.431 0.476 7.918 8.394 0 500 7860 0.500 7.600 0.541 7.760 0.559 7.715 0.576 7674 0.608 0.622 7.564 0.636 7531 0.649 7.500 0904 4004 7213 7140 7075 6913 6866 6.823 9.155 8.974 9 927 8 723 8.642 6709 6.675 6.643 6.500 8. 301 8274 8.250 0.221 8. 167 8.149 1.252 6163 1.270 6.124 1.287 9.021 7985 791 1054 6.582 1.067 6.554 7621 1.079 6.528 7607 1.091 6.502 1119 6442 7561 1145 6.386 7531 1 169 6.335 7.504 1.192 6.286 7478 1.213 6.243 7.456 97%
Question 1
This question requires the use of the Thermodynamic Property Tables supplied as
additional material.
A saturated mixture of 2 kg of liquid water and 0.7 kg of steam is heated at a constant
pressure of 40 bar until its temperature reaches 300 °C.
(a) Evaluate the temperature and the dryness fraction at the start of the process.
(b) Given that the heat transfer to a system during a constant pressure process is equal to
the increase in enthalpy of the system, calculate the heat transfer to the system in the
process described above.
(c) Finally, the system undergoes an isentropic process such that it finishes as a
saturated liquid. Evaluate the temperature at this final state.
(d) Sketch the two processes on a plot of temperature.v.specific entropy. Include on your
sketch the two-phase region and the isobar passing through states 1 and 2.
Transcribed Image Text:Question 1 This question requires the use of the Thermodynamic Property Tables supplied as additional material. A saturated mixture of 2 kg of liquid water and 0.7 kg of steam is heated at a constant pressure of 40 bar until its temperature reaches 300 °C. (a) Evaluate the temperature and the dryness fraction at the start of the process. (b) Given that the heat transfer to a system during a constant pressure process is equal to the increase in enthalpy of the system, calculate the heat transfer to the system in the process described above. (c) Finally, the system undergoes an isentropic process such that it finishes as a saturated liquid. Evaluate the temperature at this final state. (d) Sketch the two processes on a plot of temperature.v.specific entropy. Include on your sketch the two-phase region and the isobar passing through states 1 and 2.
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