Abstract
Absorption refrigeration system is one of the basic refrigeration systems, with LiBr-H2O solution being the most common working fluid. In order to perform thermodynamic design and analysis on the absorption refrigeration cycle, it is essential to develop a program to calculate the thermodynamic properties of the solution. Modelica is the most promising digital twin modeling language and has been widely used in heat flow system modeling. In this study, a new interface library for calculating the thermophysical properties of LiBr-H2O solution is introduced. This library can calculate the vapor pressure, solution temperature, enthalpy, entropy, mass concentration, etc., as well as dynamic viscosity, thermal conductivity, surface tension coefficient, and other heat transfer or thermodynamics characteristic parameters. It enables researchers to easily modeling and analyze complex LiBr-H2O absorption refrigeration cycles in Modelica within specific temperature and concentration ranges.
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