乙二醇物性表

表4-4乙二醇水溶液的密度（Kg/m3）温度。C乙二醇体积百分比浓度10%20%30%40%50%60%-351089.941104.60-301089.041103.54-251088.011102.36-201071.981086.871101.06-151070.871085.611099.64-101054.311069.631084.221098.09-51036.851053.111069.631084.221098.0901018.731035.671051.781066.801081.081094.6451017.571034.361050.331065.211079.331092.73101016.281032.941048.761063.491077.461090.70151014.871031.391047.071061.651075.461088.54201013.341029.721045.251059.681073.351086.27251011.691027.731043.321057.601071.111083.87301009.921026.021041.261055.391068.751081.35351008.021023.991039.081053.071066.271078.71401006.011021.831036.781050.621063.661075.95451003.871019.551034.361048.051050.941073.07501001.611017.161031.811045.351058.091070.0655999.231014.641029.151042.541055.131066.9460996.721011.991026.36139.611052.041063.6965994.101009.2231023.451036.551048.831060.3270991.351006.351020.421033.371045.491055.8375988.491003.341017.241030.071042.041053.2280985.501000.211014.001026.561038.461049.48表4-5 乙二醇水溶液比热（KJ/Kg.K）温度C乙二醇体积百分比浓度10%20%30%40%50%60%-353.0682.844-303.0882.866-253.1072.888-203.3343.1262.909-153.3513.1452.931-103.5603.3673.1652.953-53.7573.5743.3843.1842.97503.9373.7693.5893.4013.2032.99753.9463.7803.6033.4183.2233.018103.9543.7923.6173.4353.2423.040153.9633.8033.6313.4513.2613.062203.9723.8153.6453.4683.2813.084253.9813.8263.6603.4853.3003.106303.9893.8383.6743.5023.3193.127353.9983.8493.6883.5183.3393.149404.0073.8613.7023.5353.3583.171454.0153.8723.7163.5523.3773.193504.0243.8843.7303.5693.3963.215554.0333.8953.7453.5853.4163.236604.0423.9073.7593.6023.4353.258654.0503.9183.733.6193.4543.280704.0593.9303.7873.6363.4743.302754.0683.9413.8013.6533.4933.324804.0773.9533.8163.6693.5123.345表4-6乙二醇水溶液导热系数（W/K）温度。C乙二醇体积百分比浓度10%20%30%40%50%60%-350.3280.307-300.3330.312-250.3390.316-200.3710.3440.321-150.3770.3490.325-100.4150.3830.3540.329-50.4600.4220.3890.3590.33300.5110.4680.4290.3950.3640.33650.200.760.4360.4000.3680.340100.5280.4830.4420.4050.3730.343150.5370.4900.4480.4100.3770.346200.5450.4970.4530.4150.3800.349250.5520.5030.4590.4190.3840.352300.5590.5090.4640.4240.3870.355350.5660.5150.4690.4280.3910.358400.5720.5200.4730.4310.3940.360450.5770.5250.4770.4350.3970.363500.5830.5290.4810.4380.3990.365550.5880.5340.4850.4410.4020.367600.5920.5380.4880.4440.4040.369650.5960.5410.4910.4660.4060.371700.6000.5440.4940.4490.4080.372750.6030.5470.4960.4510.4100.374800.6060.5490.4980.4520.4110.375表4-7乙二醇水溶液粘度（mPa）温度。C乙二醇体积百分比浓度10%20%30%40%50%60%-3566.9393.44-3043.9865.25-2530.546.75-2015.75022.0734.28-1511.7416.5325.69-106.199.0612.7419.62-53.655.037.1810.0515.2502.083.024.155.838.0912.0551.792.543.484.826.639.66101.562.182.954.045.507.85151.371.892.533.444.636.46201.211.652.202.963.945.38251.081.461.922.573.394.52300.971.301.692.262.943.84350.881.171.501.992.563.29400.801.061.341.772.262.84450.730.960.211.592.002.47500.670.881.091.431.782.16550.620.810.991.291.591.91600.570.740.901.171.431.69650.530.690.831.061.291.51700.500.640.760.971.171.35750.470.590.700.891.071.22800.440.550.650.820.981.10表4-8乙二醇质量051015202530354045505560体积04.48.913.618.122.927.732.637.542.547.552.757.8凝固点C0-1.4-3.2-5.4-7.8-10.7-14.1-17.9-22.3-27.5-33.8-41.1-48.3然而，乙二醇的含水溶液则会呈现出微弱的腐蚀性，随着使用过程，乙二醇被氧化呈弱酸物 性，因此，乙二醇水溶液中应加入添加剂，添加剂包括防腐剂和稳定剂，或予先作防腐处理。可在金属表面形成阻蚀层；而稳定剂可为碱性缓冲剂硼砂，使溶液维持碱性（PH7）。溶液 中添加剂的添加量为8001200ppm。由于乙二醇水溶液的密度稍大于水，粘度大于水，而比热小于水，所以在计算载冷剂流量和 管道系统阻力时应予以注意。图 4-3给出不同质量浓度乙二醇水溶液在管道中流动时，其阻 力与水阻力相比的修正系数。