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Alkmaar is a city with  108,000 inhabitants in the centre of of Noord-Holland with a strong cultural and historical heritage. Alkmaar is also a modern city with a strong knowledge-driven economy, based on sustainability, tourism, healthcare, entrepreneurship and innovation. Alkmaar aims to be the most innovative municipality in The Netherlands by 2021 by
introducing smart city concepts and digitalizing many services. Alkmaar is highly consistent and committed in its sustainable
energy policy. Since 2014, Alkmaar has been implementing its Sustainable Energy Action Plan (SEAP) aiming at reducing its
energy consumption, carbon dioxide (CO2) emission and sustainable energy utilization by 20% in 2020, in comparison with 2008
levels. In its SEAP, Alkmaar sets a very ambitious long-term goal of
utilizing 100% sustainable energy, free of natural gas by 2050



Innovative solutions for Positive Energy (CH) Buildings and Districts
Innovative solutions for Positive Energy Buildings and Districts 1 Positive Energy (stand-alone) Buildings

•                    State-of-the-art insulation including circular materials such as flax/hemp, re-used concrete and materials with very high insulation properties and triple glazing with a low solar entry factor (G-value). In the window frames a        special seam and crack seal will be used to minimalize the infiltration of cold air with 80% in comparison with the standard values (NEN 2686);
•                    Local production of electricity with (collective) solar roofs and integrated PV elements in roofs;
•                    Local production of electricity with composite solar façades with building integrated BIPV and glass/glass PV panels on the façade;
•                    Innovative thermo acoustic heat pumps, both as booster and as part of an  integrated hybrid heating/cooling system;
•                    The Powernest, an innovative combination of urban wind and solar production system that can be installed on top of high-rises (buildings with many floors);
•                    Electrical storage in dwellings with Li-ion batteries;
•                    The use of cascades of smaller heat pumps, combined with PV-thermal panels and aquifer thermal energy storage (ATES, a ground sourced heat pump) to create an integrated high-efficient hybrid heating concept;
•                    Vacuum composite facade panels with insulation, bio-composite façade with solar cells (combining insulation and electricity production, a small number of which will be equipped with detection sensors;
•                    PCM in the floor, which function as thermal batteries, leading to a more stable climate. The PCM climate floor absorbs heat from 23 degrees and stores it. At a temperature lower than 23 degrees, the heat is released again;
•                    Home/Building Energy Management Systems - Monitoring and control within buildings to increase awareness, reduce waste and increase comfort. Through a self-learning system, the building is continuously becoming smarter. Estimated reduction on heating costs is 10 – 15%.


Tim Faassen
Gemeente Alkmaar

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