This Subtask aims to have reliable thermal analysis methods/protocols and procedures for the characterization of aterial and reaction properties for sorption and chemical reactions of thermal energy storage  (TES) applications. One goal is an inventory of already standardized measurement procedures for TCM as well  as of needed characterization procedures.

Deliverable 2 of Subtask 3P is a collection of questionnaires regarding experimental devices that are used by the experts of Task 58 / Annex 33 to investigate the degradation of Phase Change Materials (PCM). Three types of experiments are considered: Tests on degradation of PCM over thermal cycling (type I), tests on degradation of PCM with stable supercooling (type II), and tests on degradation of phase change slurries (type III).

Deliverable 1 of Subtask 3P is an inventory of properties of Phase Change Materials (PCM) that change comparing experiments in the lab environment with tests under application conditions. Examples where no change is observed are also included.