R32压焓图和物性参数表
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R32与R410A的循环特性对比研究2007年9月,《蒙特利尔议定书》第19次缔约方会议在加拿大蒙特利尔召开,会议讨论通过多项决定,其中包括关于加速逐步淘汰氢氯氟烃(HCFC)的第XIX/6号决定,要求缔约方在选择HCFC替代物时优先考虑的原则是:首先逐步淘汰那些ODP值较高的HCFC,其次要选用GWP 值最小的工质作替代品,并同时能满足健康和安全等的要求。
目前,日本、美国主要采用R410A(ODP值为零)作为R22的过渡性替代制冷剂,国内制冷空调企业也在加快推出R410A新产品,但R410A的GWP值较高(2100),这与当下全球节能减排目标尚有差距,依然需要探索与R410A热力性能相当且GWP值较低的替代制冷剂。
在这种形势下,作为R410A制冷剂一个组元的R32逐渐得到国内学者及业内人士的关注。
根据现有研究资料可知R32具有与R410A非常相近的热力性能,泄漏时的相对CO2排放当量为405,与R22相比CO2减排比例可达77.6%,符合美国环保局(2009年)在家用、商用空调部分提出减排CO2 50%~90%的措施,而R410A减排CO2仅为2.5%[2]。
本文着重对目前应用较多的环保型制冷剂R410A及具有更好环境效益的R32的循环特性进行理论对比分析和实验研究,并指出应用R32作为制冷剂时客观存在的问题。
1、 R32与R410A的基本特性分析众所周知,R410A是由R32与R125按照质量百分比1:1混合而成,这就决定了R32与R410A 在各项特性方面具有相近性。
表1列出了R32与R410A在热物性、环保特性及安全性等方面的关键参数[2,3]。
对比分析下表1中的数据不难看出,在热物理性质方面,R32的摩尔质量是R410A的0.71倍,根据充注量与摩尔质量大体上成正比关系,可知R32充注量可减少,仅为R410A的0.71倍;R32的沸点与R410A很接近,而其临界温度和临界压力比R410A偏高。
第10卷 第3期制冷与空调2010年6月REFRIGERA TION AND A IR -CONDITION IN G79284收稿日期:2010204206通信作者:饶荣水,Email :rongshuirao @制冷剂R32特性及其用于空气源热泵热水器的理论循环分析饶荣水(广东美的暖通设备有限公司)摘 要 介绍R 32,R 22和R 407C 以及R 410A 四种制冷剂的流动特性和热力学特性,并对采用这4种制冷剂的空气源热泵热水器进行理论循环分析。
从计算结果可以看出,与采用其他3种制冷剂的系统对比,采用R 32制冷剂的系统具有较低的压缩比,较高的理论CO P 以及容积制热量;在当前阶段,R 32是用于空气源热泵热水器的一种较好的制冷剂。
关键词 空气源热泵热水器;理论循环分析;热力学特性;流动特性;性能指标;制冷剂;R 32Properties of R32and its theoretical cycle analysis ofair source heat pump w ater heaterRao Rongshui(Guangdong Midea HVAC Equip ment Co.,Lt d.)ABSTRACT Int roduces t he t hermodynamic and flow p roperties of R 32,R 22,R 407C and R 410A ,and analyzes t he t heoretical cycle performance t hat employs t hese four kinds of refrigerant s for t he air source heat p ump water pared wit h t he ot her t hree kinds of ref rigerant ,t he R 32system has t he characteristics of lower compressor ratio ,higher t heoretical CO P and volume heating capacity.It shows t hat R 32is a good refriger 2ant for air source heat p ump water heater system.KE Y WOR DS air source heat p ump water heater ;t heoretical cycle analysis ;t hermody 2namic p roperties ;flow p roperties ;performance index ;ref rigerant ;R 32 随着生活水平的提高,人们对生活舒适度的要求也越来越高,热水器已经成为生活中一项必需的基本设施。
沸点露点液体气体液体气体液体气体气体液体MPa ℃℃kg/m3m3/kg Cp/Cv0.005-94.18-931444.4 3.0503383.2310.670.481 1.7496 1.1470.637 1.163760.40.006-91.96-90.81438.3 2.5708985.75311.990.4952 1.7415 1.1490.6430.162723.10.007-90.03-88.891432.9 2.22501 87.98313.150.5074 1.7347 1.1510.649 1.161693.20.008-88.31-87.191428.1 1.9633689.95314.170.5181 1.729 1.1530.653 1.161668.30.009-86.77-85.671423.8 1.7583191.74315.10.5277 1.724 1.1550.657 1.16647.20.01-85.36-84.271419.9 1.5931593.36315.940.5364 1.7196 1.1570.661 1.16628.90.02-75.43-74.4513920.8331104.92321.940.5963 1.6923 1.1710.69 1.159520.60.04-64.18-63.291359.70.4358118.21328.80.6617 1.668 1.1910.725 1.159429.80.06-56.78-56.031338.30.29818126.98333.250.7028 1.6553 1.2060.749 1.161383.10.08-51.3-50.51321.70.22768133.73336.630.7336 1.647 1.2180.769 1.164352.40.1-46.75-45.9813080.1846139.3339.370.7584 1.641 1.2280.786 1.166329.80.1013-46.48-45.711307.20.18223139.64339.530.7599 1.6406 1.2290.787 1.166328.50.12-42.87-42.121296.10.15547144.09341.70.7793 1.6364 1.2380.8010.169312.10.14-39.47-38.741285.50.1344148.33343.720.7975 1.6327 1.2460.815 1.172297.60.16-36.42-35.7212760.11844152.14345.520.8136 1.6296 1.2540.828 1.175285.40.18-33.66-32.971267.20.10591155.62347.140.8282 1.627 1.2620.84 1.177274.90.2-31.13-30.451259.10.0958158.83348.610.8414 1.6248 1.2690.851 1.18265.70.22-28.79-28.121251.50.08747161.81349.970.8536 1.6228 1.260.861 1.183257.50.24-26.61-25.951244.40.08049164.61351.220.865 1.6211 1.2820.871 1.186250.20.26-24.65-23.911237.60.07454167.25352.390.8756 1.6196 1.2880.881 1.189243.50.28-22.63-21.991231.20.06941169.75353.480.8855 1.6182 1.2940.891 1.192237.40.3-20.8-20.171225.10.06494172.13354.510.8949 1.6169 1.30.9 1.195231.80.32-19.06-18.441219.20.06101174.4355.480.9038 1.6158 1.3060.908 1.198226.60.34-17.4-16.81213.50.05753176.57356.40.9123 1.6147 1.3120.917 1.201221.80.36-15.82-15.2212080.05442178.65357.270.9203 1.6138 1.3170.925 1.204217.30.38-14.3-13.711202.80.05163180.66358.090.928 1.6129 1.3220.934 1.207213.10.4-12.84-12.261197.70.0491182.6358.880.9354 1.612 1.3280.942 1.21209.10.42-11.44-10.861192.70.04681184.47359.640.9425 1.6113 1.3330.949 1.213205.40.44-10.09-9.511187.90.04472186.28360.360.9494 1.6105 1.3380.957 1.216201.80.46-8.78-8.211183.20.0428188.04361.050.956 1.6098 1.3430.965 1.219198.50.48-7.51-6.951178.60.04104189.75361.710.9624 1.6092 1.3480.972 1.222195.30.5-6.28-5.731174.10.03941191.41362.350.9685 1.6085 1.3530.98 1.225192.20.55-3.37-2.831163.40.03584195.37363.840.9831 1.6071 1.3650.998 1.234185.10.6-0.65-0.121153.10.03285199.1365.210.9968 1.6058 1.377 1.016 1.242178.80.65 1.9 2.421143.40.0303202.64366.46 1.0095 1.6046 1.389 1.033 1.25172.90.7 4.32 4.8211340.028*******.62 1.0215 1.6036 1.4 1.051 1.259167.60.75 6.67.11124.90.02619209.21368.69 1.0329 1.6025 1.412 1.068 1.268162.70.88.779.261116.10.0245212.29369.69 1.0437 1.6016 1.424 1.085 1.277158.10.8510.8511.331107.60.02301215.26370.62 1.054 1.6007 1.435 1.102 1.287153.90.912.8313.31099.30.02167218.11371.48 1.0639 1.5998 1.447 1.12 1.296149.90.9514.7415.21091.20.02047220.87372.29 1.0733 1.5989 1.459 1.137 1.306146.1116.5717.021083.30.01939223.54373.04 1.0824 1.5981 1.471 1.155 1.317142.61.120.0320.4710680.0175228.65374.41 1.0996 1.5965 1.495 1.19 1.3391361.223.2723.691053.10.01592233.5375.6 1.1158 1.5949 1.52 1.228 1.3631301.326.3126.721038.70.01457238.12376.65 1.1309 1.5933 1.547 1.266 1.388124.51.429.1829.581024.50.0134242.54377.55 1.1453 1.5916 1.574 1.307 1.416119.51.531.932.291010.70.01238246.8378.34 1.159 1.59 1.603 1.35 1.446114.81.634.4934.869970.01148250.91379 1.1721 1.5882 1.634 1.397 1.48110.41.736.9637.32983.40.01068254.89379.55 1.1847 1.5864 1.667 1.447 1.516106.21.839.3239.679700.00996258.76380 1.1968 1.5846 1.703 1.501 1.556102.31.941.5941.92956.50.00935262.53380.35 1.2085 1.5826 1.741 1.56 1.60198.6243.7644.09943.10.00873266.22380.59 1.2198 1.5805 1.784 1.625 1.651952.145.8646.17929.60.00819269.83380.74 1.2308 1.5783 1.83 1.697 1.70891.62.247.8748.189160.0077273.38380.791.24161.5761.8821.7781.77288.3kJ/kg kJ/kg.k kJ/kg.k μPa.s 粘度R404A 饱和气体饱和液体的物性参数表(注意:该表所查的数值为露点温度下数值)绝对压力温度密度液体比体积气体比焓比熵比热容2.349.8250.11902.20.00724276.87380.73 1.2521 1.5735 1.94 1.869 1.84585.12.451.7151.99888.20.00682280.32380.57 1.2624 1.5709 2.006 1.974 1.929822.553.5353.88740.00643283.74380.31 1.2725 1.568 2.081 2.095 2.027792.655.355.56859.40.00606287.14379.92 1.2826 1.5649 2.169 2.238 2.14376.12.757.0257.26844.40.00571290.53379.42 1.2925 1.5616 2.272 2.407 2.28273.22.858.6858.91828.80.00538293.92378.77 1.3024 1.558 2.397 2.613 2.45170.32.960.360.52812.50.00507297.32377.97 1.3122 1.554 2.552 2.868 2.66267.5361.8762.08795.40.00476300.76376.99 1.3222 1.5496 2.748 3.195 2.93164.63.264.8865.07757.60.00419307.87374.35 1.3425 1.5391 3.366 4.224 3.78158.73.467.7467.89711.40.00362315.62370.3 1.3645 1.5249 4.792 6.551 5.69552.43.77572.572.55740.00174334.8334.8 1.419 1.419----℃沸点露点液体气体液体气体液体气体气体液体MPa ℃℃kg/m3m3/kg Cp/Cv 10001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000.81799.5136101113.10.02397213.3517370.021.047382126 1.6013 1.428 1.091 1.281156.60010000000000000100000000000001000000000000010000000000000100000000000kJ/kg kJ/kg.k kJ/kg.k μPa.s 比焓比熵绝对压力温度密度液体比体积气体比热容粘度 查找温度值从外表读入定性温度值10R404A 饱和气体饱和液体的物性参数表(注意:该表所查的数值为露点温度下数值)00100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000000100000000000001000000000000010000000000沸点露点液体气体液体气体液体气体气体液体MPa ℃℃kg/m3m3/kg Cp/Cv0.81799.5136101113.10.02397213.3517370.021.047382126 1.6013 1.428 1.091 1.281156.6输入值kJ/kg kJ/kg.k kJ/kg.k μPa.s R404A 饱和气体饱和液体的物性参数表(注意:该表所查的数值为露点温度下数值)绝对压力定性温度密度液体比体积气体比焓比熵比热容粘度气体液体气体液体气体--MPa 7.2123.667.0560.7640.0057.29122.3 6.12 6.7930.7660.0067.37121.2 6.23 6.5830.7680.0077.44120.2 6.33 6.4110.7680.0087.5119.3 6.42 6.2660.7680.0097.56118.5 6.5 6.140.7690.017.97113.17.1 5.390.7750.028.43107.27.77 4.7750.7870.048.73103.58.25 4.4640.7930.068.96100.88.65 4.2580.7970.089.1498.68.97 4.1070.8010.19.1598.48.99 4.1030.8010.10132b 9.2896.79.25 3.9960.8040.129.4295.19.51 3.8990.8070.149.5493.79.74 3.820.8110.169.6592.49.95 3.7550.8150.189.7591.310.15 3.6930.8170.29.8490.210.33 3.5970.820.229.9389.210.51 3.5960.8230.2410.0288.310.66 3.5520.8280.2610.187.410.83 3.5150.8310.2810.1386.611.11 3.480.8210.310.2185.911.26 3.4450.8230.3210.2985.111.4 3.420.8280.3410.3684.411.54 3.3910.830.3610.4383.811.67 3.3620.8350.3810.4983.211.8 3.3380.8370.410.5682.511.93 3.3190.840.4210.628212.05 3.2930.8430.4410.6881.412.18 3.2750.8460.4610.7480.912.3 3.2540.8490.4810.7980.312.41 3.2380.8520.510.9379.112.7 3.1940.8590.5511.0677.912.97 3.1610.8660.611.1876.913.24 3.1230.8720.6511.375.813.5 3.0960.880.711.4174.913.75 3.0670.8860.7511.527414.01 3.0420.8920.811.6373.114.26 3.0210.8990.8511.7472.314.5130.9060.911.8471.514.76 2.9810.9120.9511.9470.715 2.9670.919112.1469.315.5 2.9340.932 1.112.3467.916 2.910.947 1.212.5466.716.51 2.8880.962 1.312.7465.517.04 2.8720.977 1.412.9364.317.58 2.8620.993 1.513.1363.318.14 2.85 1.011 1.613.3462.218.73 2.846 1.031 1.713.5461.219.35 2.847 1.05 1.813.7560.320 2.847 1.073 1.913.9759.320.69 2.858 1.097214.258.421.43 2.87 1.124 2.114.4357.622.212.8851.1552.2绝对压力μPa.s粘度普郎克数导热率m.N/m 下数值)14.6856.723.06 2.912 1.19 2.314.9355.923.97 2.943 1.23 2.415.2155.124.97 2.984 1.276 2.515.554.426.05 3.034 1.332 2.615.8153.727.24 3.097 1.397 2.716.155328.56 3.179 1.478 2.816.5252.33005 3.2940.016 2.916.9351.831.74 3.427 1.704317.9250.936.05 3.882 2.1 3.219.315142.77 4.924 2.958 3.4----- 3.775c气体液体气体液体气体--℃-9300000-90.800000-88.900000-87.200000-85.700000-84.300000-74.500000-63.300000-5600000-50.500000-4600000-45.700000-42.100000-38.700000-35.700000-3300000-30.500000-28.100000-2600000-23.900000-2200000-20.200000-18.400000-16.800000-15.200000-13.700000-12.300000-10.900000-9.5100000-8.2100000-6.9500000-5.7300000-2.8300000-0.1200000 2.4200000 4.82000007.1000009.2611.5673.6814.09943.0350.89511.330000013.30000015.20000017.020000020.470000023.69μPa.sm.N/m 导热率普郎克数粘度露点下数值)0000026.720000029.580000032.290000034.860000037.320000039.670000041.920000044.090000046.170000048.180000050.110000051.990000053.80000055.560000057.260000058.910000060.520000062.080000065.070000067.890000072.5气体液体气体液体气体--MPa 11.5673.6814.09943.0350.8950.818普郎克数绝对压力μPa.s m.N/m 为露点温度下数值)粘度导热率。