| 2. | A new model , which is expand - corresponding - states form with 4 characteristic parameters , is built . the second and third virial coefficients of dry air , water vapor and humid air are determined 在湿度0 w 1kg / kg ( a ) ,温度小于573 . 15k ,压力小于5mpa时,与ashrae用的多项式维里方程计算的偏差焓和偏差熵进行了比较,误差很小。 |