不同温度和压力下空气在水中的溶解度计算公式(4.4-98.9 ℃和0-689.476 kpa任意温度和压力点下溶解度).docx

《不同温度和压力下空气在水中的溶解度计算公式(4.4-98.9 ℃和0-689.476 kpa任意温度和压力点下溶解度).docx》由会员分享，可在线阅读，更多相关《不同温度和压力下空气在水中的溶解度计算公式(4.4-98.9 ℃和0-689.476 kpa任意温度和压力点下溶解度).docx（8页珍藏版）》请在第一文库网上搜索。

1、空气在水中的溶解度拟合求解下方为插入的一个Excel文件，双击可以进行编辑。摄氏温度U C 压力pkpa表压）溶解度s华无朝。RPtpsi65.3.36.20.01317384149.545.250364(4.4-98.，。)(0/89.476kpa)范围fl(t)f20.000809095 0.0089258填入温度值和压力值即可得对应的溶解度。华氏度 斜率截距 斜率截距e8斜率k截距b400.0017720.02581772002580000华氏度149.54149.54500.0015330.022315330022300005次系数-2.5E-14-4E-13600.0013650.0

2、19713650019700004次系数L89E-112.81E-10700.0012310.017712310017700003次系数-5.7E-09-8.3E-08800.0011320.016111320016100002次系数8.82E-071.27E-05900.0010540.014710540014700001 次系数-7.4E-05-0.001071000.000990.01369900013600000次系数0.0036450.0529891100.0009390.01269390012600001200.0008950.01178950011700001300.000861

3、0.01078610010700001400.0008330.0098833009800001500.0008090.0089809008900001600.000790.0079790007900001700.0007760.0068776006800001800.0007650.0055765005500001900.0007580.0041758004100002000.0007550.0024755002400002100.0007540.00047540040000以下为溶解度计算公式的拟合过程O溶解度溶解度是指溶质在一定量的溶剂中的溶解度极限。它是饱和溶液的浓度。空气在水中的溶解度

4、溶解在水中的空气量随压力升高而增加，随温度升高而降低。考虑所查得数据的整洁性，下文温度采用华氏温度。F,压力单位采用英制压力单位Psig（1 psi=6894.76 Pa） o其中华氏温度F与摄氏温度C换算关系为F=9/5C+32。空气在水中的溶解度（溶解的空气体积与水体积之比）有以下数据。溶解度V _/V 仝r 小温度oF表压psi020406080100400.02580.06130.09670.13210.16760.203500.02230.05290.08360.11430.14490.1756600.01970.04690.07420.10140.12960.1559700.017

5、70.04230.06690.09160.11620.1408800.01610.03870.06140.0840.10670.1293900.01470.03580.05690.0780.0990.12011000.01360.03340.05320.0730.09280.11261100.01260.03140.05010.06890.08770.10651200.01170.02960.04750.06540.08330.10121300.01070.0280.04520.06240.07960.09681400.00980.02650.04320.05980.07650.0931150

6、0.00890.02510.04130.05740.07360.08981600.00790.02370.03950.05530.07110.08691700.00680.02230.03780.05340.06890.08441800.00550.02080.03610.05140.06670.0821900.00410.01920.03440.04960.06470.07992000.00240.01750.03260.04770.06280.07792100.00040.01550.03060.04570.06070.0758拟合得出以下曲线（各定压下空气溶解度与温度关系）:对表中数据转

7、置，重新拟合（各定温下空气溶解度与压力关系）得:90807060504050440430420di00di0204060英制压力psi801002o54o4o度解溶5os以上可得出定温下空气溶解度与压力关系式，各关系式斜率k及截距b如下：kbk*le8b*le8400.0017720.02581772002580000500.0015330.02231533002230000600.0013650.01971365001970000700.0012310.01771231001770000800.0011320.01611132001610000900.0010540.014710540014

8、700001000.000990.01369900013600001100.0009390.01269390012600001200.0008950.01178950011700001300.0008610.01078610010700001400.0008330.0098833009800001500.0008090.0089809008900001600.000790.0079790007900001700.0007760.0068776006800001800.0007650.0055765005500001900.0007580.0041758004100002000.0007550.

9、0024755002400002100.0007540.00047540040000对斜率数据和截距数据分别拟合曲线得（横坐标均表示华氏温度）：斜率曲线190000y = -0.00000251 xs + 0.00189028 X4-0.56934430 X3 + 88.18500070X2-7,419.59019035 x + 364,489.1918681070000 R2 = 0,999955701500001300001100009000070000406080100120140160180200截距曲线令斜率k=f/T),截距b=f2(T)o若已知水温为t,表压为p,则匕口，b= f2(t)o溶解度 s=k*p+b= f(t)*p+ 弓。以上为近似求解空气在水中溶解度的方法(注意单位换算)。