Single-shell, two-tube pass heat exchanger with surface area 0.4 m? and overall heat transfer coefficient of 1800 W/m²-K; saturated steam at 110°C condenses on one side while water at a flow rate of 0.35 kg/s enters at 17°C. Calculate (a) Outlet temperature of the water (b) Rate of condensation of steam. cp(water)=4179 J/kg. K. 916 Thermodynamics

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Author:Kreith, Frank; Manglik, Raj M.
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Chapter10: Heat Exchangers
Section: Chapter Questions
Problem 10.13P
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Single - shell , two - tube pass heat exchanger with surface area 0.4 m² and overall heat transfer coefficient of 1800 W / m²K ; saturated steam at 110 ° C condenses on one side while water at a flow rate of 0.35 kg / s enters at 17 ° C . Calculate ( a ) Outlet temperature of the water ( b ) Rate of condensation of steam . cp ( water ) = 4179 J / kg . K.
Single-shell, two-tube pass heat exchanger with surface area 0.4 m² and
overall heat transfer coefficient of 1800 W/m²-K; saturated steam at 110°C
condenses on one side while water at a flow rate of 0.35 kg/s enters at 17°C.
Calculate (a) Outlet temperature of the water (b) Rate of condensation of steam.
cp(water)=4179 J/kg. K.
916
Thermodynamics
TABLE A-4
Saturated water-Temperature table
Specific volume,
m/kg
Internal energy,
k/kg
Enthalpy,
KJ/kg
Entropy,
kJ/kg- K
Sat.
Evap., vapor,
Sat.
Sat.
Sat.
Sa.
liquid,
Sa.
Sat.
Sat.
Sat.
liquid, Evap., vapor,
Temp., press.,
T°C
liquid,
vapor,
liquid,
Evap.,
vapor,
Pat kPa
0.6117
0.8725 0.001000
1.2281
1.7057 0.001001
2.3392 0.001002
2374.9 2374.9
2381.8
2388.7
0.001 2500.9
21.020
42.022 2477.2
2500.9
2510.1
2519.2
2528.3
2537.4
0.0000 9.1556 9.1556
0.0763 8.9487 9.0249
0.1511 8.7488 8.8999
0.2245 8.5559 8.7803
0.2965 8.3696 8.6661
0.01
0.001000
206.00
147.03
106.32
77.885
57.762
0.000
21.019
42.020
62.980
83.913
2360.8
2489.1
2346.6
2332.5
2318.4 2402.3
10
0.001000
15
20
2395.5
62.982 2465.4
83.915 2453.5
104.83
125.74
146.64
25
3.1698 0.001003
4.2469
5.6291
7.3851
9.5953
43.340
32.879
25.205
19.515
15.251
104.83
125.73
146.63
167.53
188.43
2304.3
2290.2
2276.0
2261.9
2409.1
2415.9
2422.7
2429.4
2436.1
2441.7
2429.8
2417.9
2406.0
-2394.0
2546.5
2555.6
2564.6
2573.5
2582.4
0.3672 8.1895 8.5567
0.4368 8.0152 8.4520
0.5051 7.8466 8.3517
0.5724 7.6832 8.2556
0.6386 7.5247 8.1633
30
35
0.001004
0.001006
0.001008
0.001010
40
45
167.53
2247.7
188.44
50
55
60
65
70
12.352
15.763
19.947
25.043
31.202
12.026
9.5639
7.6670
6.1935
5.0396
209.33
230.24
251.16
2233.4
2219.1
2204.7
2442.7
2449.3
2455.9
2462.4
2468.9
2382.0
0.001012
0.001015
0.001017
0.001020
0.001023
209.34
230.26
251.18
2591.3
2600.1
0.7038 7.3710 8.0748
0.7680 7.2218 7.9898
0.8313 7.0769 7.9082
0.8937 6.9360 7.8296
0.9551 6.7989 7.7540
2369.8
2357.7
2345.4
2333.0
2608.8
2617.5
2626.1
272.09
2190.3
2175.8
272.12
293.04
293.07
75
2161.3
2475.3
38.597
47.416
57.868
70.183
84.609
1.0158 6.6655 7.6812
1.0756
1.1346 6.4089 7.5435
1.1929 6.2853 7.4782
1.2504 6.1647 7.4151
0.001026
0.001029
4.1291
3.4053
2.8261
2.3593
1.9808
313.99
80
85
90
314.03
335.02
356.02
377.04
398.09
2320.6 2634.6
2308.0
2295.3
2282.5
2269.6
334.97
2146.6
2131.9
2117.0 2494.0
2102.0 2500.1
2481.6
2643.0
2651.4
2659.6
2667.6
6.5355 7.6111
2487.8
0.001032
0.001036
0.001040
355.96
376.97
398.00
95
101.42
120.90
143.38
169.18
198.67
0.001043
0.001047
0.001052
0.001056
0.001060
2256.4
2243.1
2229.7
2216.0 2698.6
2202.1
100
1.6720
1.4186
419.06
440.15
461.27
482.42
503.60
2087.0
2071.8
2056.4
2040.9
2025.3
2506.0
105
110
115
1.2094
1.0360
O.89133
2511.9
2517.7
2523.3
2528.9
419.17
440.28
461.42
2675.6
2683.4
1.3072 6.0470 7.3542
1.3634 5.9319 7.2952
1.4188 5.8193 7.2382
1.4737 5.7092 7.1829
1.5279 5.6013 7.1292
2691.1
482.59
120
503.81
2706.0
125
130
135
140
145
232.23
270.28
313.22
361.53
0.001065
0.001070
0.001075
0.001080
0.001085
2534.3
2539.5
2544.7
2549.6
0.77012
0.66808
524.83
546.10
567.41
588.77
610.19
2009.5
1993.4
525.07
2188.1
2713.1
1.5816 5.4956 7.0771
1.6346 5.3919 7.0265
546.38
567.75
589.16
2720.1
2159,1 2726.9
2144.3
2173.Z
0.58179
0.50850
0.44600
1977.3
1960.9
1944.2
1.6872 5.2901 6.9773
1.7392 5.1901 6.9294
1.7908 5.0919 6.8827
2733.5
415.68
2554.4
610.64
2129.2
2739.8
476.16
543.49
618.23
700.93
792.18
0.001091
0.001096
0.001102
0.001108
0.39248
0.34648
0.30680
150
1927.4
1910.3 2563.5
1893.0
1875.4
2559.1
155
160
165
631.66
653.19
674.79
696.46
718.20
632.18
653.79
675.47
697.24
719.08
2098.0
2082.0
2065.6
2113.8 2745.9
2751.8
2757.5
2762.8
2767.9
1.8418 4.9953 6.8371
1.8924 4.9002 6.7927
1.9426
1.9923 4.7143 6.7067
2.0417 4.6233 6.6650
2567.8
2571.9
4.8066 6.7492
0.27244
170
0.001114
0.24260
1857.5
2575.7
2048.8
2.0906 4.5335 6.6242
2014.2 2777.2 2.1392 4.4448 6.5841
2.1875 4.3572 6.5447
2.2355 4.2705 6.5059
2.2831 4.1847 6.4678
175
2772.7
892.60
1002.8
1123.5
1255.2
0.001121
0.001127
ם 0.00
0.001141
0.001149
0.001157
0.21659
0.19384
0.17390
0.15636
0.14089
740.02
761.92
783.91
806.00
828.18
850.46
1839.4
2579.4
2582.8
2586.0
1783.0 2589.0
741.02
763.05
785.19
807.43
2031.7
180
1820.9
1996.2 2781.4
1977.9 2785.3
185
1802.1
190
195
200
1398.8
1554.9
1763.6 2591.7
829.78
1959.0
2788.8
0.12721
1743.7
2594.2
852.26
1939.8
2792.0
2.3305 4.0997 6.4302
Transcribed Image Text:Single-shell, two-tube pass heat exchanger with surface area 0.4 m² and overall heat transfer coefficient of 1800 W/m²-K; saturated steam at 110°C condenses on one side while water at a flow rate of 0.35 kg/s enters at 17°C. Calculate (a) Outlet temperature of the water (b) Rate of condensation of steam. cp(water)=4179 J/kg. K. 916 Thermodynamics TABLE A-4 Saturated water-Temperature table Specific volume, m/kg Internal energy, k/kg Enthalpy, KJ/kg Entropy, kJ/kg- K Sat. Evap., vapor, Sat. Sat. Sat. Sa. liquid, Sa. Sat. Sat. Sat. liquid, Evap., vapor, Temp., press., T°C liquid, vapor, liquid, Evap., vapor, Pat kPa 0.6117 0.8725 0.001000 1.2281 1.7057 0.001001 2.3392 0.001002 2374.9 2374.9 2381.8 2388.7 0.001 2500.9 21.020 42.022 2477.2 2500.9 2510.1 2519.2 2528.3 2537.4 0.0000 9.1556 9.1556 0.0763 8.9487 9.0249 0.1511 8.7488 8.8999 0.2245 8.5559 8.7803 0.2965 8.3696 8.6661 0.01 0.001000 206.00 147.03 106.32 77.885 57.762 0.000 21.019 42.020 62.980 83.913 2360.8 2489.1 2346.6 2332.5 2318.4 2402.3 10 0.001000 15 20 2395.5 62.982 2465.4 83.915 2453.5 104.83 125.74 146.64 25 3.1698 0.001003 4.2469 5.6291 7.3851 9.5953 43.340 32.879 25.205 19.515 15.251 104.83 125.73 146.63 167.53 188.43 2304.3 2290.2 2276.0 2261.9 2409.1 2415.9 2422.7 2429.4 2436.1 2441.7 2429.8 2417.9 2406.0 -2394.0 2546.5 2555.6 2564.6 2573.5 2582.4 0.3672 8.1895 8.5567 0.4368 8.0152 8.4520 0.5051 7.8466 8.3517 0.5724 7.6832 8.2556 0.6386 7.5247 8.1633 30 35 0.001004 0.001006 0.001008 0.001010 40 45 167.53 2247.7 188.44 50 55 60 65 70 12.352 15.763 19.947 25.043 31.202 12.026 9.5639 7.6670 6.1935 5.0396 209.33 230.24 251.16 2233.4 2219.1 2204.7 2442.7 2449.3 2455.9 2462.4 2468.9 2382.0 0.001012 0.001015 0.001017 0.001020 0.001023 209.34 230.26 251.18 2591.3 2600.1 0.7038 7.3710 8.0748 0.7680 7.2218 7.9898 0.8313 7.0769 7.9082 0.8937 6.9360 7.8296 0.9551 6.7989 7.7540 2369.8 2357.7 2345.4 2333.0 2608.8 2617.5 2626.1 272.09 2190.3 2175.8 272.12 293.04 293.07 75 2161.3 2475.3 38.597 47.416 57.868 70.183 84.609 1.0158 6.6655 7.6812 1.0756 1.1346 6.4089 7.5435 1.1929 6.2853 7.4782 1.2504 6.1647 7.4151 0.001026 0.001029 4.1291 3.4053 2.8261 2.3593 1.9808 313.99 80 85 90 314.03 335.02 356.02 377.04 398.09 2320.6 2634.6 2308.0 2295.3 2282.5 2269.6 334.97 2146.6 2131.9 2117.0 2494.0 2102.0 2500.1 2481.6 2643.0 2651.4 2659.6 2667.6 6.5355 7.6111 2487.8 0.001032 0.001036 0.001040 355.96 376.97 398.00 95 101.42 120.90 143.38 169.18 198.67 0.001043 0.001047 0.001052 0.001056 0.001060 2256.4 2243.1 2229.7 2216.0 2698.6 2202.1 100 1.6720 1.4186 419.06 440.15 461.27 482.42 503.60 2087.0 2071.8 2056.4 2040.9 2025.3 2506.0 105 110 115 1.2094 1.0360 O.89133 2511.9 2517.7 2523.3 2528.9 419.17 440.28 461.42 2675.6 2683.4 1.3072 6.0470 7.3542 1.3634 5.9319 7.2952 1.4188 5.8193 7.2382 1.4737 5.7092 7.1829 1.5279 5.6013 7.1292 2691.1 482.59 120 503.81 2706.0 125 130 135 140 145 232.23 270.28 313.22 361.53 0.001065 0.001070 0.001075 0.001080 0.001085 2534.3 2539.5 2544.7 2549.6 0.77012 0.66808 524.83 546.10 567.41 588.77 610.19 2009.5 1993.4 525.07 2188.1 2713.1 1.5816 5.4956 7.0771 1.6346 5.3919 7.0265 546.38 567.75 589.16 2720.1 2159,1 2726.9 2144.3 2173.Z 0.58179 0.50850 0.44600 1977.3 1960.9 1944.2 1.6872 5.2901 6.9773 1.7392 5.1901 6.9294 1.7908 5.0919 6.8827 2733.5 415.68 2554.4 610.64 2129.2 2739.8 476.16 543.49 618.23 700.93 792.18 0.001091 0.001096 0.001102 0.001108 0.39248 0.34648 0.30680 150 1927.4 1910.3 2563.5 1893.0 1875.4 2559.1 155 160 165 631.66 653.19 674.79 696.46 718.20 632.18 653.79 675.47 697.24 719.08 2098.0 2082.0 2065.6 2113.8 2745.9 2751.8 2757.5 2762.8 2767.9 1.8418 4.9953 6.8371 1.8924 4.9002 6.7927 1.9426 1.9923 4.7143 6.7067 2.0417 4.6233 6.6650 2567.8 2571.9 4.8066 6.7492 0.27244 170 0.001114 0.24260 1857.5 2575.7 2048.8 2.0906 4.5335 6.6242 2014.2 2777.2 2.1392 4.4448 6.5841 2.1875 4.3572 6.5447 2.2355 4.2705 6.5059 2.2831 4.1847 6.4678 175 2772.7 892.60 1002.8 1123.5 1255.2 0.001121 0.001127 ם 0.00 0.001141 0.001149 0.001157 0.21659 0.19384 0.17390 0.15636 0.14089 740.02 761.92 783.91 806.00 828.18 850.46 1839.4 2579.4 2582.8 2586.0 1783.0 2589.0 741.02 763.05 785.19 807.43 2031.7 180 1820.9 1996.2 2781.4 1977.9 2785.3 185 1802.1 190 195 200 1398.8 1554.9 1763.6 2591.7 829.78 1959.0 2788.8 0.12721 1743.7 2594.2 852.26 1939.8 2792.0 2.3305 4.0997 6.4302
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