This paper assesses wind resource characteristics and energy yield for micro wind turbines integrated on noise barriers. An experimental set-up with sonic anemometers placed on top of the barrier in reference positions is realized. The effect on wind speed magnitude, inflow angle and turbulence intensity is analysed. The annual energy yield of a micro wind turbine is estimated and compared using data from a micro-wind turbine wind tunnel experiment and field data. Electrical energy costs are discussed as well as structural integration cost reduction and the potential energy yield could decrease costs. It was found that instantaneous wind direction towards the barrier and the height of observation play an influential role for the results. Wind speed increases in perpendicular flows while decreases in parallel flow, by +35% down to −20% from the reference. The azimuth of the noise barrier expressed in wind field rotation angles was found to be influential resulted in 50%–130% changes with respect to annual energy yield. A micro wind turbine (0.375 kW) would produce between 100 and 600 kWh annually. Finally, cost analysis with cost reductions due to integration and the energy yield changes due to the barrier, show a LCOE reduction at 60%–90% of the reference value. https://doi.org/10.1016/j.jweia.2020.104206
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tract Micro wind turbines can be structurally integrated on top of the solid base of noise barriers near highways. A number of performance factors were assessed with holistic experiments in wind tunnel and in the field. The wind turbines underperformed when exposed in yawed flow conditions. The theoretical cosθ theories for yaw misalignment did not always predict power correctly. Inverter losses turned out to be crucial especially in standby mode. Combination of standby losses with yawed flow losses and low wind speed regime may even result in a net power consuming turbine. The micro wind turbine control system for maintaining optimal power production underperformed in the field when comparing tip speed ratios and performance coefficients with the values recorded in the wind tunnel. The turbine was idling between 20%–30% of time as it was assessed for sites with annual average wind speeds of three to five meters per second without any power production. Finally, the field test analysis showed that inadequate yaw response could potentially lead to 18% of the losses, the inverter related losses to 8%, and control related losses to 33%. The totalized loss led to a 48% efficiency drop when compared with the ideal power production measured before the inverter. Micro wind turbine’s performance has room for optimization for application in turbulent wind conditions on top of noise barriers. https://doi.org/10.3390/en14051288
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Universities have the potential, and the responsibility, to take on more ecological and relational approaches to facilitating learning-based change in times of interconnected socioecological crises. Signs for a transition towards these more regenerative approaches of higher education (RHE) that include more place-based, ecological, and relational, ways of educating can already be found in niches across Europe (see for example the proliferation of education-based living labs, field labs, challenge labs). In this paper, the results of a podcast-based inquiry into the design practises and barriers to enacting such forms of RHE are shown. This study revealed seven educational practises that occurred across the innovation niches. It is important to note that these practises are enacted in different ways, or are locally nested in unique expressions; for example, while the ‘practise’ of cultivating personal transformations was represented across the included cases, the way these transformations were cultivated were unique expressions of each context. These RHE-design practises are derived from twenty-seven narrative-based podcasts as interviews recorded in the April through June 2021 period. The resulting podcast (The Regenerative Education Podcast) was published on all major streaming platforms in October 2021 and included 21 participants active in Dutch universities, 1 in Sweden, 1 in Germany, 1 in France, and 3 primarily online. Each episode engages with a leading practitioner, professor, teacher, and/or activist that is trying to connect their educational practice to making the world a more equitable, sustainable, and regenerative place. The episodes ranged from 30 to 70 min in total length and included both English (14) and Dutch (12) interviews. These episodes were analysed through transition mapping a method based on story analysis and transition design. The results include seven design practises such as cultivating personal transformations, nurturing ecosystems of support, and tackling relevant and urgent transition challenges, as well as a preliminary design tool that educational teams can use together with students and local agents in (re)designing their own RHE to connect their educational praxis with transition challenges. van den Berg B, Poldner K, Sjoer E, Wals A. Practises, Drivers and Barriers of an Emerging Regenerative Higher Education in The Netherlands—A Podcast-Based Inquiry. Sustainability. 2022; 14(15):9138. https://doi.org/10.3390/su14159138
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Client: ERA-NET Cofund Smart Cities and Communities, JPI Urban EuropeUrban tourism generates income for cities and create opportunities for its businesses and employment for its residents. However, it can also lead to overcrowding, pollution, noise and numerous other problems, thus reducing quality of life for residents and other local stakeholders and potentially leading to public discontent. This project introduces SCITHOS as a concept that consists of guidelines and tools to help cities find solutions to make the transition towards environmentally and socially responsible urban tourism that simultaneously contributes to long-term prosperity.Within SCTHOS this is done by combining hospitality principles, simulation tools, apps and serious gaming techniques to support policymakers and other stakeholders in generating collaborative deep reflections about barriers to sustainable urban tourism and the need for transition or adaptation strategies. The project supports the assessment of intervention strategies based on an interactive simulation-supported multi-stakeholder approach that triggers social learning and behavior change, while stimulating shared governance and smart citizenship.Guidelines/ tools and the full concept are developed through a series of living labs and field experiments in participating cities. What is more, a Smart City Hospitality network is set up to ensure accessibility to this concept, including all tools and experiences with using them. The final results of the projects are presented 10 and 11 September 2019 in Vienna, as a pre-session to the popular annual Tourism conference (TOURMIS).
