Innovative microencapsulated phase change materials for direct-absorption solar collectors.
TKI Urban Energy
TNO, Raedthuys, Croda, Dutch Solar Systems B.V., Center for Renewable Energy Sources and Saving.
Direct absorption solar collectors (DASCs), in which the heat transfer fluid (HTF) directly absorbs and converts solar energy into thermal energy, have proved to have higher receiver efficiencies than conventional solar collectors. The incorporation of phase change materials (PCMs) in conventional HTFs offers potential to enhance the efficiency even further. The aim of the project is to introduce and characterize novel microencapsulated PCM slurries (ME-PCMS) for direct absorption solar collectors. The working fluid acts both as the HTF and energy storage medium, following two main purposes:
- to increase the efficiency,
- to increase energy storage capability of the collectors.