To support the transition to fossil free society and economy, energy storage and particularly thermal energy storage has been identified as a strategic technology. Within this project, we want to study and build a cost effective and compact thermochemical heat storage system based on ammonia salts (2-3 kWh storage capacity), thanks to the heat which can be stored and recovered from the desorption and absorption of the ammonia into the salts.
Start date: 2017-01-01
End date: 2020-12-31
Start: January 2017
Duration: 4 years
Project manager: DTU (Denmark)
Partners: IFE, KTH (Sweden) and AMMINEX Emissions Technology (Denmark) Uppsala Universtiy and Stockholm University
To rationally design a thermochemical heat storage system, of high efficiency and long life-time, careful characterization of the spatio-temporal development of the ammonia salts micro-/macrostructure during the ammonia cycling is needed. Indeed, the ammonia cycling induces volume changes and macroporous structures within the bed of salts. For such characterization, neutrons are especially well suited. Diffraction, small angle scattering, tomography and radiography, can reveal information from the atomic scale up to the system level.
Furthermore, utilization of hydrogenated or deuterated ammonia offers ideal phase contrast for the characterization at the different length scales, the two hydrogen isotopes having very different neutron scattering cross sections.