Database of Sorption Materials Equilibrium Properties

Thermally-driven sorption systems can utilize a wide range of heat source to provide heating, cooling, heat transforming, and energy storage. The performance of a sorption system strongly depends on the equilibrium vapor pressure of the sorbate, which can be calculated using an equilibrium equation of state for the working pair. Numerous studies have been published formulating the vapor equilibrium from experimental measurements for various sorption working pairs. However, each study typically includes only a few working pairs, and information is scattered across a large number of sources. Therefore, it takes considerable effort to pinpoint the correlation for a desired working pair. Moreover, variations of functional forms, terminologies, and conventions were found across different literatures, adding to the difficulty of implementing multiple correlations for computer simulation and comparison. To overcome these challenges, this study created a readily usable database of vapor equilibrium for both absorption and adsorption working pairs with easy indexing and convenient implementation for computer simulation. The database was constructed by generalizing the equilibrium equations of state to provide compatibility with data from various published sources, unifying terminologies and unit bases across coefficient constants were unified, and compiling the data into a system of tables providing convenient indexing. As a result, 402 readily usable correlations for 352 sorption working pairs have been compiled, covering a wide range of sorbates including water, ammonia, methanol, ethanol, HFCs, HFOs, and hydrocarbons. The compiled database was also implemented into an open-source library named SorpPropLib, which can be directly used for calculating equilibrium vapor pressure of working pairs as well as supporting sorption systems simulation in various software.