乙二醇水溶液冰點(diǎn)

乙二醇水溶液冰點(diǎn)1乙二醇水溶液冰點(diǎn)乙二醇〔體積分?jǐn)?shù)〕，冰點(diǎn)〔°C〕10-4.120-7.530-14.140-22.950-33.060-50.02二甘醇水溶液冰點(diǎn)二甘醇〔體積分?jǐn)?shù)〕，%凝點(diǎn)〔°C〕10-5.020-7.230-13.040-20.050-36.060-60.0氯化鈣水溶液熱物理性質(zhì)速查表-氯化鈣水溶液冰點(diǎn)密度〔重量%〕9.414.718.920.923.825.727.528.529.429.9凝固點(diǎn)〔℃〕-5.2-10.2-15.7-19.2-25.7-31.2-38.6-43.6-50.1-55時(shí)的密度〔kg/m3〕1080113011701190122012401260127012801286乙二醇水溶液熱物理性質(zhì)速查表-乙二醇水溶液冰點(diǎn)密度〔重量%〕4.68.412.216.019.823.627.431.235.038.846.4凝固點(diǎn)〔℃〕-2-4-5-7-10-13-15-17-21-26-33時(shí)的密度〔kg/m3〕10051010101510201025103010351040104510501060中溫型冷水機(jī)組低溫型冷水機(jī)組中溫型冷水機(jī)組低溫型冷水機(jī)組冷凍水出水溫度〔℃〕0-5-10-15-20-25-30制冷量1.471.241.00.8250.6700.5440.411輸入功率1.1031.0521.00.9450.880.830.7762.07，凝固點(diǎn)為-12.7℃，溶解潛熱〔-12.7℃〕187kJ/kg。不同濃度的乙二醇溶液的密度比熱導(dǎo)熱系數(shù)粘度和凝固點(diǎn)見下表:體積%體積%0102030405060乙二醇水溶液的密度kg/m3乙二醇水溶液的密度kg/m3溫度乙二醇體積百分比濃度乙二醇水溶液的導(dǎo)熱系數(shù)w/m.K溫度乙二醇體積百分比濃度凝固點(diǎn)〔℃〕0-3-8-16-25-37-55℃253040506065100-4011201130-17.8108011001110112011604.4104810571070108811001110114526.7104010481060107710901095113048.9103010381050106410771820111571.1101810251038105010621068104993.31005101310261038104910541084℃10%20%30%-100.415-50.460.42200.5110.4680.42950.520.4760.436100.5280.4830.442乙二醇水溶液的比熱乙二醇水溶液的比熱kJ/kg.k溫度溫度乙二醇體積百分比濃度℃10%20%30%-103.56-53.7573.57403.9373.7693.58953.9463.783.603103.9543.7923.617℃10%20%30%-106.19-53.655.0302.083.024.1551.792.543.48101.562.182.95乙二醇水溶液的粘度mPa.s乙二醇水溶液的粘度mPa.s溫度乙二醇體積百分比濃度載冷劑載冷劑是用來將制冷機(jī)所產(chǎn)生的冷熱量傳遞給被冷卻或加熱對象的中間物熱器中的載冷劑不凍結(jié)。鹽水溶液氯化鈣水溶液比熱密度冰點(diǎn)常用為氯化鈉〔Nacl〕水溶液，氯化鈣水溶液〔CaCL2〕。鹽水溶液對金屬有有關(guān)。可實(shí)行措施：①用高純度鹽配制鹽水溶液；②削減溶液與空氣接觸的時(shí)機(jī),承受閉式循環(huán)系統(tǒng)或鹽水箱上加蓋；③加肯定量的緩蝕劑，使溶液量弱堿性，其PH值保持在7.5~8.5間。常用為：氫氧化鈉〔NaOH〕和重鉻酸鈉〔Na2Cr2O7〕，質(zhì)量配比為NaOH：Na2Cr2O7=27：100。有機(jī)化合物載冷劑常用為乙二醇水溶液和三元溶液〔質(zhì)量百分?jǐn)?shù)40%乙二醇，20%乙醇，40%-64℃〕，該類載冷劑對設(shè)備無任何腐蝕性，但有較低的揮發(fā)性，因此建議做成密閉循環(huán)系統(tǒng)。常用載冷劑使用溫度和配比質(zhì)量濃度表。使用溫度使用溫度比熱動(dòng)力粘度×k載冷劑℃%℃kg/m3kJ/kg.KPa.s0℃氯化鈣水溶12-7.211113.4652.5液16-7102016-710203.892.8416-1211403.23.1423.6-1310303.775.1020-1711803.064.8831.2-1710403.646.6722-2212002.955.840-2210703.3511.724.5-2712302.858.145-27.510803.23198112.950-33.810883.1130.527.5-38.612602.7413.653-37.911