If necessary I can send you the article mentioned in pdf. But since I don't know how to do this through [this] e-mail form of the EnergyPlus Support Forum, you could send me an e-mail on a.vandebree@xxxxxxxxx requesting the article. The article describes in detail a new algoritme for PCM including subcooling and some validation work.
Our client asked us to investigate the possibility to implement in EnergyPlus the new algoritme for PCM including the subcooling-effect. As far as we know there is no option (at the moment) in EnergyPlus to interact with MatLab or other tools capable of programming your own algoritmes. The only alternative then is to ask you if there is a way to improve the current PCM-object through the EnergyPlus-team. Could you inform us about the options?