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1、从你的蒸汽温度和压力情况看，基本上是饱和水蒸气。计算分两步计算，首先，蒸汽变成100C的水，利用的是潜热，100C的水变成80C水利用的是显热。(1 )蒸汽变成100C的水放热查得180C的蒸汽潜热约为 2020KJ .zhangyong6404 发表于 2009-9-12 23:07 O个人认为二楼的算法有疑问，按这个算法将100C 101Kpa的蒸汽变成80C的水释放的热量=100 C的蒸汽潜热+100C水变成 80C释放热=2258.4+84=2342.4kj大于180C的数据。即便是80C的蒸汽变成 80C的水 潜热也在2307kj也比前者大。2020的数据应该是180C时 蒸汽变成1
2、80C的水说释放的热量然后180摄氏度的水变成 80摄氏度的水还要释放能量应该是 2020 +( 180-80 ) *4.2=2440KJ精确的数据是2447.31，由180C时的汽化热 2019.3KJ加上180C水的液体焓减去80C的水的液体焓(763.25-334.03 )。 不过压力好像不太对得上，要高于 8.7公斤。饱和水蒸汽表(按温度排列)温度绝对压力蒸汽比容蒸汽密度液体焓蒸汽焓汽化热kPam3/kgkg/m3kJ/kgkJ/kgkJ/kg00.61206.50.00480.002491.32491.350.87147.10.006820.942500.92480.0101.231
3、06.40.009441.872510.52468.6151.7177.90.012862.812520.62457.8202.3357.80.017283.742530.12446.3253.1743.40.0230104.682538.62433.9304.2532.930.0304125.602549.52423.7355.6225.250.0396146.552559.12412.6407.3719.550.0511167.472568.72401.1459.5815.280.0654188.422577.92389.55014.9812.0540.0830209.342587.623
4、78.15515.749.5890.1043230.292596.82366.56019.927.6870.1301251.212606.32355.16525.016.2090.1611272.162615.62343.47031.165.0520.1979293.082624.42331.27538.504.1390.2416314.032629.72315.78047.403.4140.2929334.942642.42307.38557.902.8320.3531355.902651.22295.39070.102.3650.4229376.812660.02283.19584.501
5、.9850.5039397.772668.82271.0100101.301.6750.5970418.682677.22258.4105120.801.4210.7036439.642685.12245.5110143.301.2120.8254460.972693.52232.4115170.001.0380.9635481.512702.52221.0120198.600.8931.1199503.672708.92205.2125232.100.77151.2960523.382716.52193.1130270.200.66931.4940546.382723.92177.61353
6、13.000.58311.7150565.252731.22166.0140361.400.50961.9620589.082737.82148.7145415.600.44692.2380607.122744.6213*150476.100.39332.5430632.212750.72118.5160618.100.30753.2520675.752762.92087.1170792.400.24314.1130719.292773.32054.01801003.000.19445.1450763.252782.62019.31901255.000.15686.3780807.632790
7、.11982.52001554.000.12767.8400852.012795.51943.52101917.000.10459.5690897.232799.31902.12202320.000.086211.6000942.452801.01858.52302797.000.0715513.9800988.502800.11811.62403347.000.0596716.76001034.562796.81762.22503976.000.0499820.01001081.452790.11708.62604693.000.0419923.82001128.762780.91652.1
8、2705503.000.0353828.27001176.912760.31591.42806220.000.0298833.47001225.482752.01526.52907442.000.0252539.60001274.462732.31457.83008591.000.0213146.93001325.542708.01382.53109876.000.0179955.59001378.712680.01301.332011300.000.0151665.95001436.072648.21212.133012880.000.0127378.53001446.782610.51113.734014510.000.0106493.98001562.932568.61005.735016530.000.00884113.20001632.202516.7880.5