Thermodynamic and physical properties of ammonia-lithium thiocyanate system

Abstract

tion applies to yi(P<>:i. The thermodynamic consistency test becomes (Xi In 7i(P°> + x2 In 72*<po>)|X2, 7i (P)°7 2 *(P°) (hi

Generating Correlations for Specific Volume, Enthalpy, and Entropy of Opteon: Utilizing a Novel Data Fitting Method

“…However, the same argument cannot be extended to the double Chebyshev series represented by (2) Because since the values of x1 and x2 must be in the range (-1,1), a transformation from their original values is necessary.…”

“…The Proportional Nodes Method was employed to derive a singular equation correlating the enthalpy of ammonia-water solution, as reported by Macriss et al (1964) within the temperature range of 273.15 K to 353.15 K. Table 2 showcases the enthalpy (kJ/kg) against varying concentrations of ammonia in the ammoniawater solution. The table establishes a relationship between temperature, represented in °C, and the ammonia concentration, given as weight percentages, ranging from 0.0 to 100.0 wt.…”

“…Equation of saturated enthalpy (kJ/kg) and coefficient of determination at each temperature 273.15 H = -0.00001108x 4 + 0.00204055x 3 -0.01044078x 2 The process of deriving proportional nodes is particularly vital in understanding the variances in enthalpies across the temperature spectrum. As depicted in Figure 1, the enthalpy values appear to be uniformly spread.…”