15 research outputs found
Aquaponics - a test case for the Van Gendt halls in Amsterdam
No full textArchitecture and The Built EnvironmentArchitectureArchitectural Engineerin
Renewable Hydrogen in the Dutch Built Environment and the Impact on Energy Security
No full textThe field of energy security is dominantly filled with concepts and frameworks built on the characteristics of traditional fossil fuel energy systems. Increasing penetration of renewable energy sources in the energy system brings about novel implications and challenges in the field of energy security. Hydrogen is an increasingly popular option to decarbonize hard to abate sectors or parts of the heating system. The Netherlands has a favourable position and infrastructure for large scale hydrogen roll-out. The objective of this research is to explore how hydrogen utilized in the Dutch built environment affects energy security performance. Moreover, what geotechnical characteristics of hydrogen are responsible for a change in energy security performance. A framework for analysis is constructed and applied to the current Dutch energy system as a reference case and two future energy scenarios. The data requirements are retrieved through desk research and interviews with stakeholders and experts in the field. The research concludes that hydrogen positively affects future energy security performance. The geotechnical characteristics of hydrogen can explain the differences between the results of the scenario. These emphasize a shift in energy dependencies, global hydrogen markets, increased diversity due to the broader system role of hydrogen and efficiency reductions. Future research should focus on different hydrogen production pathways and reassessing the concept of energy security given renewable energy carriers and geopolitics.Complex Systems Engineering and Management (CoSEM
Interferometrical characterization of stress birefringence in germanium
No full textWe report on the characterisation of the refractive index homogeneity in large blanks of Czochralski-grown Germanium, for thermal imaging use. With a phase-measuring Twyman-Green interferometer working at 10.6 mu m, a map of the index of refraction with an accuracy better than 1 10(-5) can be obtained for blanks which do not exhibit high birefringence. Tn the other case, principal stresses in the disks can be determined through the effect of birefringence on the interferogram, if the stresses are distributed cylinder-symmetrically in the plane of the disk. Relations between stresses, transmittance, and electrical resistivity of the material are observed
Small two-dimensional and linear arrays of polycrystalline SiGe microbolometers at IMEC-XenICs
No full text
