The development of the new type of simple, middle accurate approximations of caloric functions of state of wet steam

Abstract eng:
In the continuation of the previous study dealing with approximations of p,vl,vg, (∂p/∂vl )T , (∂p/∂vg )T as f(T) of the new type, the present contribution introduces a set of approximations of enthapy and entropy on the lover saturation curve and of heat of vaporization. Some of them, unfortunately all of lower accuracy, can be used as reversible functions. The various simple multiplyingfunctions are used as the approximating functions. The accuracy moves between percentage fractions up to 5 percent of maximum value of the pertinent function. The values of exponents and coefficients optimized by the least squares method, the courses of deviations of approximated quantities from correct data are given.

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