31 January 2013

PCM thermal energy storage system coupled to a heat pump


The University of Lleida (Spain) has an experimental set-up consisting of a thermal energy storage (TES) system
coupled to a heat pump. Phase-change materials (PCM) are used in the TES system as latent heat storage
material. The system operates with a load-shifting strategy, so the two TES units installed supply the entire
cooling or heating demand while shifting the electricity demand of the HVAC system to off-peak hours. The system
prototype has been tested under summer conditions in Spain and is being tested for winter conditions in
Estonia. This article describes the system and the first results of the trials