Solar heating cooling energy mixes to transform low energy buildings in nearly zero energy buildings

摘要

Nearly Zero Energy Building will be a mandatory status for all new buildings constructed after 31st December 2020 for European member states. This implies that, beside energy efficiency at the level of Low Energy Buildings, systems based on renewable energy sources must be implemented to provide energy savings and environmental benefits for space conditioning and water heating. Focusing on solar heating and cooling renewable-based systems, the paper presents an analysis aiming at identifying an optimal energy mix to reach the Nearly Zero Energy status for Low Energy Buildings, by evaluating and comparing the economic efficiency at current costs. A case study with experimental validation is done for a new R&D Laboratory building. The analysis is done considering functional and economic issues.