The adaptivity of façades is increasingly recognized as an important functional feature to be integrated with the state-of–the-art building technology. The aim is thereby to control its reversible system states in real-time to adapt to current indoor and outdoor conditions. Concepts reported elsewhere integrate two or more functions related to structural integrity, ventilation, heating and cooling, solar protection, as well as energy generation and storage. Although advantages are perceived obvious, the number of realized case studies remains limited. Triggered by this observation, the authors of this contribution report research findings from a literature study and interviews with stakeholders in the field, including contractors, building consultants and architects. The three key-findings suggest that (1) the functions daylighting and energy generation/storage are most commonly integrated into façades or façade components characterized as being adaptive, (2) interviewees are divided on the implementation potential of most of the designs/concepts and (3) the aesthetics of the design, (investment) costs, durability and required maintenance are critical for a widespread market uptake. Herewith, this paper contributes new knowledge to the discussion related to finding the right level of system integration in building technology.
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The application of DC grids is gaining more attention in office applications. Especially since powering an office desk would not require a high power connection to the main AC grid but could be made sustainable using solar power and battery storage. This would result in fewer converters and further advanced grid utilization. In this paper, a sustainable desk power application is described that can be used for powering typical office appliances such as computers, lighting, and telephones. The desk will be powered by a solar panel and has a battery for energy storage. The applied DC grid includes droop control for power management and can either operate stand-alone or connected to other DC-desks to create a meshed-grid system. A dynamic DC nano-grid is made using multiple self-developed half-bridge circuit boards controlled by microcontrollers. This grid is monitored and controlled using a lightweight network protocol, allowing for online integration. Droop control is used to create dynamic power management, allowing automated control for power consumption and production. Digital control is used to regulate the power flow, and drive other applications, including batteries and solar panels. The practical demonstrative setup is a small-sized desktop with applications built into it, such as a lamp, wireless charging pad, and laptop charge point for devices up to 45W. User control is added in the form of an interactive remote wireless touch panel and power consumption is monitored and stored in the cloud. The paper includes a description of technical implementation as well as power consumption measurements.
Vanuit het bedrijfsleven is vraag naar het ontwikkelen van coatings met specifieke hoogwaardige eigenschappen. Een technisch haalbare en kosten efficiënte methode om dit te doen is door het inmengen van nanodeeltjes in coatings of in polymeren. Op dit moment is de beschikbaarheid (op grotere schaal) van hoogwaardige nanodeeltjes (grootte en deeltjesgrootte distributie) echter nog een knelpunt. Microreactortechnologie kan hiervoor een goede uitkomst bieden. In een microreactor kunnen reactiecondities zeer goed gecontroleerd worden en daardoor zal de reproduceerbaarheid goed zijn. Ook is het eenvoudig om een reactie in een microreactor op te schalen naar een groter volume. In het RAAK-MKB project Flow4Nano worden 2 sleutel technologieën van het lectoraat Material Sciences van Zuyd Hogeschool bij elkaar gebracht: nanotechnologie en microreactor technologie. In dit project zal de focus liggen op de toepassing van nanodeeltjes in optische coating voor zonnecellen en voor glastuinbouw. De toepassing in zonnecellen is een focus van het lectoraat Zonne Energie in de Gebouwde Omgeving van Zuyd. De toepassing in de glastuinbouw is een focus van de Hogeschool Arnhem Nijmegen in het lectoraat duurzame energie. De onderzoekvraag voor dit project is: “Can we produce nanoparticles with high specificity for use in advanced coatings and polymers with tailored functionalities for application in greenhouses and solar cells using (micro)flow?” De consortiumleden Zuyd Hogeschool / lectoraat material sciences (microreactor technologie / nanotechnologie), TNO/brightlands Material Centre (nanomaterialen voor energietoepassingen), Kriya Materials (producent nanodeeltjes) en Chemtrix (microflow apparatuur) zullen TiO2 en ZnO nanodeeltjes maken en karakteriseren. De consortiumpartners Zuyd / lectoraat Zonne-energie in de duurzaam gebouwde omgevingen HAN (lectoraat duurzame energie) zullen de geproduceerde nanodeeltjes testen in optisch actieve coatings voor toepassingen in zonne-energie en glastuinbouw respectievelijk. De consortiumpartner NanoHouse zal het stuk disseminatie op zich nemen.
Zuyd University and partners will develop novel coatings that contribute to a reduction in energy consumption of houses and buildings. The built environment currently consumes 46% of all energy, mainly for heating and cooling. A strong reduction is required as part of the transition towards sustainable energy. This is expressed by ambitious targets set by the Parkstad region, which has set itself the target to be energy neutral in 2040. For the Window of the Future Zuyd University (lectoraat Nanostructured Materials) and DWI (post-doc) aims to develop infrared regulating coatings that keep the heat inside in winter and outside in summer. These coatings are expected to strongly contribute to reduction of energy consumption. We will develop coating materials for application on glass windows, which are transparent for visible light to allow maximal daylight entering the building, and simultaneously regulate the transmission and reflection of IR heat. Kriya and Physee (SMEs) will advise Zuyd on technical and economic challenges related to the development of IR regulating glass windows. OMT Solutions (SME) and SGS Intron will advise on characterization and the performance validation. The need for such windows is confirmed by TNO/The Brightlands Materials Center as central challenge in their Optoelectronics program. They contribute largely to this project. Large demonstrator windows will be coated, and installed in test houses for real-life testing and quantification of the energy reduction. Zuyd (lectoraat Solar Energy in the Built Environment) will quantify the impact of smart IR regulating windows on the energy transition by comparing their impact to other available technologies, e.g. solar cells. In this quantification, Zuyd will focus on the Parkstad region. Together with Parkstad and Maastricht University (Ph.D. student), Zuyd will also quantify the socio-economic impact, and promote the societal acceptance of smart IR regulating windows.