Material selection and testing for thermal energy storage in solar cooling

Encapsulated High Temperature PCM as Active Filler Material in a Thermocline-based Thermal Storage System

“…They act as a sacrificial layer which is removed by heat treatment and leads to a void space between the PCM and the shell that will allow the expansion of the PCM when melting and protect the PCM from dissolving in water as well as in several organic solvents. This route has been also found in the state of the art analysis by University of South Florida [13,14].…”

“…Being aware of this, when selecting the PCM for the upper part of the thermocline tank, melting temperatures of around 5 to 25ºC less than the HTF maximum temperatures are required to guaranty a good performance and phase changing of the PCM. These temperature ranges have been established along with specialized bibliography recommendations [14]. Thus, the required PCM for the upper part of the tank are of 370-390ºC for the parabolic trough system and 540-560ºC for the tower configuration.…”

Thermal energy storage for low and medium temperature applications using phase change materials – A review

“…Medium and large scale systems such as centralized cooling (absorption chillers [9], [10] were used. The weighting correlations used to obtain the thermophysical properties, namely heat ca-158 pacity (Cp), density (ρ), thermal conductivity (λ) and melting enthalpy (ΔH m ), are presented in equa-159 tions 1 to 6, which use available properties of the mixture and its constituents, molar ratio (x i ), mass 160 ratio (w i ) and volumetric ratio (z i ) and their melting point (Tm) to predict the unknown values.…”

Task 42 Annex 29 Position Paper and All Final Deliverable Papers

“…D-mannitol and hydroquinone were used at real solar cooling plant. For the same boundary conditions, the energy stored by d-mannitol was higher than that for hydroquinone [22].…”