Question:
A 2 m3?container for heating water is initially filled with H2O liquid and vapor at 400 K, with 20% of the volume being liquid. Use the aatables in Appendix A.3 to work this exercise. Check your numbers using the v?u chart, and show the process representation on a v?u sketch.
a. What is the pressure in the tank?b. What is the mass of the H2O in the tank?c. Suppose that the inflow and outflow pipes are closed and the heating occurs at a rate of 170 kW. What will be the temperature in the tank when the pressure has risen to 10 MPa?d. How much energy input as heat will be required to reach this condition?e. How long will it take to reach this condition?
Data From Appendix A.3
Transcribed Image Text:
T/
K
275
280
psat /
MPa
273.16 0.0006117 0.001000 206.0 0.0 2500.9 2500.9 0.0
2496.5 2504.3 0.0283
2484.7 2513.5 0.1041
285
2472.8 2522.6 0.1784
2461.0 2531.7 0.2513
0.0006985 0.001000 181.6 7.8
0.0009918 0.001000 130.2 28.8
0.001389 0.001001 94.61 49.8
290 0.001920 0.001001 69.63 70.7
295 0.002621 0.001002 51.87 91.7
300 0.003537 0.001003 39.08 112.6
305 0.004719
133.5 2425.4 2558.9 0.4622
310 0.006231
2449.2 2540.8 0.3228
2437.3 2549.9 0.3931
0.001005 29.77
0.001007 22.91
154.4
2413.5 2567.9 0.5302
315
0.008145
175.3
2401.6 2576.8 0.5970
0.001009 17.80
0.001011 13.96 196.2
320
0.01055
2389.6 2585.7 0.6629
217.1 2377.5 2594.6 0.7277
325 0.01 353
330 0.01721
0.001013 11.04
0.001015 8.806 238.0
2365.4 2603.3 0.7915
335 0.02172
340 0.02719
0.03378
0.04 168
345
350
FI
UV / h² | h²V / hv / s/
SLV /
m³/kg m³/kg kJ/kg kJ/kg kJ/kg kJ/(kg K) kJ/(kg K) kJ/(kg .K)
9.1555
9.1555
9.0783
9.1066
8.8738
8.9779
0.05108
355
360 0.06219
365 0.07526
370 0.09054
375 0.1083
380 0.1289
385 0.1525
390 0.1796
395 0.2106
400 0.2458
405 0.2856
0.001018 7.079 258.9 2353.2 2612.1 0.8544
0.001021 5.734 279.8 2340.9 2620.7 0.9164
300.8 2328.5 2629.3 0.9775
321.7 2316.0 2637.7 1.0378
342.7 2303.4 2646.1 1.0973
363.7 2290.7 2654.4 1.1560
384.8
405.8
0.001037 2.210
2277.8 2662.5 1.2140
0.001041 1.859
2264.8 2670.6 1.2713
0.001045 1.572
426.9 2251.6 2678.5 1.3279
0.001049 1.336
448.0 2238.2 2686.3 1.3838
0.001053 1.141 469.2 2224.7 2693.9 1.4390
0.001058 0.9794 490.4 2210.9 2701.3 1.4937
0.001062 0.8440 511.7 2197.0 2708.6 1.5477
0.001067 0.7303 532.9 2182.8 2715.7 1.6012
0.001072 0.6345 554.3 2168.3 2722.6 1.6542
0.001024 4.678
0.001027 3.842
0.001030 3.176
0.001034 2.642
8.6766
8.4862
8.3023
8.1244
7.9523
7.7856
7.6241
7.4674
7.3154
7.1678
7.0244
6.8849
6.7492
6.6171
6.4884
6.3629
6.2405
6.1209
6.0042
5.8900
5.7783
5.6690
5.5619
5.4569
5.3539
8.8550
8.7375
8.6251
8.5175
8.4145
8.3158
8.2211
8.1303
8.0431
7.9593
7.8787
7.8013
7.7267
7.6549
7.5857
7.5189
7.4545
7.3922
7.3320
7.2738
7.2174
7.1627
7.1096
7.0581
7.0080