First cycle simulations of the Honigmann process with LiBr/H2O and NaOH/H2O as working fluid pairs as a thermochemical energy storage

A thermochemical energy storage invented in the 19th century, the so-called ‘Honigmann process’, is reconsidered for the storage of renewable energies or waste heat. In this work, one basic process option of charging with the input of low-grade heat and discharging with the release of mechanical work is studied. A fundamental model based on transient energy and mass balances was implemented with the help of the modelling language Modelica. First simulation results indicate a relatively constant power output in spite of the non-steady-state nature of the process.