Field Test Results of a PV-HVAC System with PCM-Storage for Improved Grid Interaction
Abstract
This abstract presents the key results of the development and successful integration of a PCM (Phase Change Material) storage to a solar-electric driven air conditioning system (PV-HVAC). The main goals are to increase self-consumption, reduce electrical peak load demand and feed in peaks by the PV plant. In this paper the benefits of the storage integration in terms of system efficiency, solar-fraction and reduction of electrical peak demand are described. To verify the improvement, the PV-HVAC system without storage had been evaluated the entire cooling period 2018. After successful storage integration the system will be analyzed in the cooling period 2019. These long term field test measurements allow a detailed and very reliable comparison between the operation with and without storage. To optimize storage usage, predictive storage control strategies had been implemented and will be discussed. Key-words: Air Conditioning, Variable Refrigerant Flow (VRF), Phase Change Material (PCM), Thermal Storage, PV-self-consumption, Demand Side Management, Predictive Control Strategies