此题为判断题(对,错)。
第3题
25.4MPa锅炉的水冷壁工质特性参数
t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] | t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] |
340 | 77 | 6.310 | 504.5 | 390 | 33 | 35.633 | 268.9 |
350 | 73 | 6.921 | 482.4 | 400 | 30 | 14.136 | 177.2 |
360 | 68 | 7.972 | 458.6 | 410 | 29 | 9.731 | 147.6 |
370 | 63 | 10.204 | 430.5 | 420 | 29 | 7.694 | 131.8 |
380 | 54 | 19.454 | 394.5 | 422 | 29 | 7.409 | 129.5 |
第4题
27.4MPa锅炉的再热器工质特性参数
t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] | t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] |
370 | 23 | 2.696 | 59.0 | 510 | 29 | 2.369 | 72.7 |
390 | 24 | 2.596 | 60.5 | 530 | 30 | 2.359 | 75.1 |
410 | 25 | 2.523 | 62.2 | 550 | 31 | 2.353 | 77.5 |
430 | 26 | 2.471 | 64.1 | 570 | 32 | 2.349 | 80.0 |
450 | 27 | 2.432 | 66.1 | 590 | 32 | 2.348 | 82.6 |
470 | 27 | 2.404 | 68.2 | 600 | 33 | 2.348 | 83.8 |
490 | 28 | 2.384 | 70.4 | 603 | 33 | 2.348 | 84.2 |
第5题
27.4MPa锅炉的水冷壁工质特性参数
t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] | t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] |
330 | 82 | 5.788 | 530.1 | 390 | 47 | 30.519 | 363.9 |
340 | 78 | 6.150 | 509.8 | 400 | 34 | 23.598 | 241.8 |
350 | 74 | 6.661 | 488.6 | 410 | 31 | 13.012 | 180.3 |
360 | 70 | 7.474 | 465.9 | 420 | 30 | 9.454 | 153.2 |
370 | 65 | 8.946 | 440.3 | 430 | 30 | 7.624 | 137.5 |
380 | 58 | 12.559 | 408.1 | 434 | 30 | 7.120 | 133.0 |
第6题
25.4MPa锅炉的省煤器工质特性参数
t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] | t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] |
296 | 94 | 5.075 | 590.8 | 310 | 89 | 5.305 | 567.6 |
300 | 92 | 5.135 | 584.5 | 315 | 87 | 5.405 | 558.7 |
305 | 91 | 5.216 | 576.2 | 320 | 85 | 5.517 | 549.4 |
第7题
已知,超临界压力锅炉的主蒸汽压力p1=25.4MPa,主蒸汽温度t1=571℃,分离器蒸汽温度tf=422℃,再热蒸汽压力p2=4.05MPa,再热蒸汽温度t2=569℃,再热蒸汽入口温度t0=306℃,给水温度tgs=278℃,已知条件列于下表,计算该压力下过热器中工质加热过程的Pr并对计算结果进行分析与讨论。
25.4MPa锅炉的过热器工质特性参数
t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] | t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] |
430 | 29 | 6.510 | 121.9 | 510 | 31 | 3.662 | 100.7 |
440 | 29 | 5.740 | 115.3 | 520 | 31 | 3.538 | 100.5 |
450 | 29 | 5.192 | 110.7 | 530 | 32 | 3.431 | 100.6 |
460 | 29 | 4.779 | 107.3 | 540 | 32 | 3.339 | 100.8 |
470 | 30 | 4.456 | 104.9 | 550 | 33 | 3.259 | 101.2 |
480 | 30 | 4.196 | 103.2 | 560 | 33 | 3.190 | 101.7 |
490 | 30 | 3.985 | 102.0 | 570 | 33 | 3.128 | 102.3 |
500 | 31 | 3.809 | 101.2 | 571 | 33 | 3.123 | 102.4 |
第8题
13.7MPa锅炉的再热蒸汽特性参数
t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] | t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] |
270 | 18.62 | 2.727 | 46.97 | 420 | 25.24 | 2.254 | 59.70 |
280 | 19.08 | 2.639 | 47.41 | 440 | 26.10 | 2.246 | 61.93 |
300 | 19.99 | 2.509 | 48.57 | 460 | 26.94 | 2.241 | 64.23 |
320 | 20.88 | 2.420 | 50.02 | 480 | 27.79 | 2.240 | 66.58 |
340 | 21.77 | 2.359 | 51.68 | 500 | 28.62 | 2.242 | 68.99 |
360 | 22.65 | 2.316 | 53.51 | 520 | 29.45 | 2.245 | 71.45 |
380 | 23.52 | 2.287 | 55.47 | 540 | 30.28 | 2.249 | 73.94 |
400 | 24.38 | 2.267 | 61.93 |
第9题
9.8MPa锅炉的省煤器工质特性参数
t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] | t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] |
240 | 114 | 4.662 | 643.6 | 290 | 92 | 5.291 | 577.1 |
250 | 109 | 4.746 | 633.2 | 300 | 88 | 5.524 | 558.7 |
260 | 104 | 4.846 | 621.5 | 310 | 84 | 5.839 | 538.5 |
270 | 100 | 4.965 | 608.4 | 320 | 80 | 6.295 | 516.3 |
280 | 96 | 5.110 | 593.6 | 330 | 75 | 7.034 | 492.1 |
第10题
已知,亚临界压力锅炉的主蒸汽压力p1=16.8MPa,主蒸汽温度t1=540℃,再热蒸汽压力p2=3.86MPa,再热蒸汽温度t2=540℃,再热蒸汽入口温度t0=280℃,给水温度tgs=270℃,已知条件列于下表。计算该压力下水蒸气热力循环过程中主蒸汽加热过程的Pr并对计算结果进行分析与讨论。
16.8MPa锅炉的主蒸汽特性参数
t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] | t (℃) | u×10-6 [kg/(m·s)] | cp [kJ/(kg·K)] | λ×10-3 [W/(m·K)] |
360 | 23.92 | 9.948 | 113.22 | 460 | 27.76 | 3.375 | 82.9'2 |
370 | 24.13 | 7.396 | 101.17 | 470 | 28.19 | 3.267 | 83.11 |
380 | 24.45 | 6.099 | 94.51 | 480 | 28.62 | 3.174 | 83.44 |
390 | 24.82 | 5.307 | 90.34 | 490 | 29.04 | 3.095 | 83.91 |
400 | 25.22 | 4.770 | 87.57 | 500 | 29.47 | 3.026 | 84.48 |
410 | 25.63 | 4.380 | 85.69 | 510 | 29.89 | 2.967 | 85.15 |
420 | 26.05 | 4.083 | 84.43 | 520 | 30.31 | 2.915 | 85.90 |
430 | 26.48 | 0.000 | 82.91 | 530 | 30.73 | 2.870 | 86.72 |
440 | 26.90 | 3.660 | 83.13 | 540 | 31.15 | 2.830 | 87.60 |
450 | 27.33 | 3.504 | 82.91 |
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