In een city farm optimaliseren we alle factoren voor zover we dat met de huidige stand van techniek kunnen. Relatief goedkoop is het regelen van de temperatuur, de luchtvochtigheid en het CO2-gehalte. Relatief duur is het aanbieden van de meeste efficiënte lichtkleuren in de optimale mix voor de hoogste productie en de beste kwaliteit. In het algemeen werken we met blauw licht voor o.a. opening van de huidmondjes, rood licht als belangrijkste fotosynthesekleur en verrood licht voor het extra bevorderen van de foto-synthese en sturen van het plantmodel. Soms werken we met rode en witte LED-lampen, waarbij de witte lampen zorgen voor blauw en o.a. groen licht en het mogelijk maken de kleuren weer normaal te zien.
MULTIFILE
Purpose In the Netherlands, the prevalence of visual impairments is the highest among the subgroup of nursing home residents. Over 40 percent are estimated to have visual impairments1. Older adults experience visual problems due to biological aging or eye disease2. These problems can affect several visual functions as well as daily functions in general3,4. Providing appropriate lighting of sufficient intensity and color temperature (CT), and making use of capabilities of the visual environment in the nursing home4 is one of the tasks for professional carers.Light conditions were measured in order to find out to what extent older adults live with the proper lighting conditions. With these data, we wanted to enhance the awareness among care professionals of how light conditions affect the daily lives of the nursing home residents. Moreover, care professionals and technical staff could make the right improvements to the nursing home environment based on the outcomes. Method We assessed light conditions (Konica Minolta chromameter CL-200) in seven nursing homes in the Netherlands. Light conditions were measured in places where residents spend most of their time during the day. In total, 59 living rooms and corridors were assessed in this study. Horizontal and vertical illuminances as well as CT were measured and compared to the values given in a guideline by the Dutch Society for Illumination5. The study was performed between October 2009 and the end of March 2010 at daytime between 10:00 and 15:00 hours. By measuring in autumn, winter and early spring, the contribution of daylight to the indoor illuminance levels was kept at a minimum. Results & Discussion In general lighting conditions encountered in the nursing homes were poor. Four-fifths of the measured illuminances in the common rooms were below the 1,000 lx threshold. Illuminances in the corridors fell below the 200 lx threshold in at least three quarters of the measurements. This means that nursing home residents may have difficulty carrying out tasks and could fall during transfers. The CT of light to which nursing home residents were exposed, fell below the reference value for daylight of 5,000 K with median scores of 3,400 to 4,500 K. High CT of light, in combination with higher illuminances, may positively affect the biological clock, resulting in better sleep quantity and quality.Nursing home staff should be aware of these data in order to arrange better light conditions. Technical staff should be aware that lighting guidelines are not specifically developed for older adults. Special attention should be paid to the fact that older adults need more light than younger persons to perform Activities of Daily Living (ADL).
Purpose:The International Commission on Illumination (CIE) recommends researchers to investigate a widevariety of behavioural and health outcomes. However, researchers often investigate only a part of occupationalhealth (OH) in relation to light. A literature study (2002–2017) regarding the relationship between office lightingconditions and OH was performed to identify gaps and methodological issues.Method:The OH outcomes investigated in this paper were grouped according to the International Classificationof Diseases and analysed per category: physical and physiological health, mental health, eye health, sleep param-eters and visual comfort.Results:Findings from the literature study (20 eligible papers) showed that all OH aspects were mostly but notexclusively measured subjectively. Furthermore, most studies investigated only a fraction of office lighting par-ameters and OH aspects.Conclusions:It seems that Correlated Colour Temperature (CCT) and illuminance mainly correlate with OH.However, this may also be explained by gaps and methodological issues in studies described in eligible papers.Based on the literature study, an overview was composed elucidating gaps and methodological issues of officelighting and OH studies. It can be used to design and target the purpose of light and health research.
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.
