OPTIMAL SIZING OF ACTIVE SOLAR ENERGY AND STORAGE SYSTEMS FOR ENERGY PLUS HOUSES

Buildings generating more energy than they require are a promising possibility to increase the share of renewable energies in the energy matrix. The German Federal Ministry for the Environment, Nature Conservation, Building and Nuclear Safety funded projects that provide a proof of concept of residential buildings producing energy beyond their own requirements, the so called "Efficiency Houses Plus" (EHP). The present work builds up on data of one of these buildings to propose an optimization model that minimizes the energy provision costs for a building while achieving the EHP standard. The model considers solar energy systems, a heat pump as well as electric and thermal storage systems. The model is used to determinate system configurations able to achieve the EHP standard under seven different scenarios. The results serve to discuss the relevance of each of the considered technologies for EHPs in the near future.