Abstract:This paper describes a project to reduce the excessive daylight exposure of an oil painting, Hambletonian, Rubbing Down, displayed at Mount Stewart, Northern Ireland. Climate-based daylight modelling (CBDM) was used to understand the light exposure of Hambletonian and to assess the impact of control measures on the annual light exposure and viewing condition of the painting in the winter months. The computer model was used in conjunction with measured lux data to establish the base case light exposure and the … Show more
“…reduced reflectance by changing the colour of the cupola/walls, and reduced transmission for the rooflight glazing. 14 These interventions were then put in place, and the monitoring to date suggests that the annual light dose has indeed been reduced broadly in line with that predicted by the simulations. Figure 2Photograph showing Hambletonian displayed on the Stone Staircase at Mount Stewart (Belfast, Northern Ireland) alongside CBDM simulation of cumulative annual illuminance (available in colour in online version)…”
A novel high-dynamic range camera-based approach to measure the cumulative daylight dose in historic/conservation spaces has been devised and tested in a real-world setting under normal viewing conditions. The technique derives illuminance from the high-dynamic range-acquired luminance at numerous patches of the wall surfaces visible in the high-dynamic range image. These patches serve as proxy illuminance meters, thereby allowing the prevailing illumination field across the entire visible wall to be derived using a Kriging algorithm. The technique was validated under both controlled and in-situ conditions over periods of several months and shown to have comparable accuracy to the illuminance logging devices commonly used in historic/conservation settings. The set-up comprising a consumer digital camera and tethered computer proved remarkably resilient and allowed for continuous monitoring periods of six months or more. Application in a real-world setting revealed operational practicalities that would not have been found in a controlled environment.
“…reduced reflectance by changing the colour of the cupola/walls, and reduced transmission for the rooflight glazing. 14 These interventions were then put in place, and the monitoring to date suggests that the annual light dose has indeed been reduced broadly in line with that predicted by the simulations. Figure 2Photograph showing Hambletonian displayed on the Stone Staircase at Mount Stewart (Belfast, Northern Ireland) alongside CBDM simulation of cumulative annual illuminance (available in colour in online version)…”
A novel high-dynamic range camera-based approach to measure the cumulative daylight dose in historic/conservation spaces has been devised and tested in a real-world setting under normal viewing conditions. The technique derives illuminance from the high-dynamic range-acquired luminance at numerous patches of the wall surfaces visible in the high-dynamic range image. These patches serve as proxy illuminance meters, thereby allowing the prevailing illumination field across the entire visible wall to be derived using a Kriging algorithm. The technique was validated under both controlled and in-situ conditions over periods of several months and shown to have comparable accuracy to the illuminance logging devices commonly used in historic/conservation settings. The set-up comprising a consumer digital camera and tethered computer proved remarkably resilient and allowed for continuous monitoring periods of six months or more. Application in a real-world setting revealed operational practicalities that would not have been found in a controlled environment.
“…A short list to illustrate the diversity of application follows: The prediction of the cumulative annual exposure of daylight on artworks for conservation, and the effectiveness of various amelioration techniques. 40 Prediction of the ‘daylight injury’ to the roof-lit studios of the Art Students League Building (New York) by the Central Park (formerly Nordstrom) Tower. The Central Park Tower, due to be completed in 2019, will be the second tallest building in the US.…”
Section: Viewpoint: John Mardaljevicmentioning
confidence: 99%
“…The prediction of the cumulative annual exposure of daylight on artworks for conservation, and the effectiveness of various amelioration techniques. 40…”
Section: Viewpoint: John Mardaljevicmentioning
confidence: 99%
“…40 Prediction of the 'daylight injury' to the roof-lit studios of the Art Students League Building (New York) by the Central Park (formerly Nordstrom) Tower. The Central Park Tower, due to be completed in 2019, will be the second tallest building in the US.…”
Despite widespread research on daylighting, there are insufficient data to justify a definitive statement on daylighting design criteria. This paper reviews the requirements for daylighting codes and guidelines, doing so from two different viewpoints. The first considers standards and regulations, the second is focused on development and the scope of climate-based daylight modelling.
“…To compare the quality of atmospheres with outside view, the three daylight indexes are proposed: the DGP, DGI and DA. In this context, consider that people choose quality atmospheres or places for leisure time such as, for instance, quality restaurants and also for this activity, the computation and simulation method is a convenient method to explore relationships, achieve a better understanding of these complex situations at a reasonable cost and help to achieve better and healthier conditions [23][24][25].…”
This work deals with daylighting for quality indoor atmospheres, considering building skins. In recent years, almost all retrofit facades of restaurants are highly glazed façades, boosting glare, sun ray absorption and overheating inside. Most of the time, they are not integrated with daylight control; therefore, lighting and out view requirements are not so balanced. Taking into account this daylighting complexity, an alternative façade system is proposed to simulate by Radiance. Previously, perception simulations are compared with measured data, in order to discretize the simulations. In addition, for one point three different view are assessed as: work plane, relation plane and the out plane. Subsequently, two virtual façade models, windows combined by complex fenestration system (CFS) as prismatic film (PF) and highly glazed façade, are tested according to daylighting. For that, three indexes have been used: daylight glare probability (DGP), daylight glare index (DGI) and daylight autonomy (DA). The results show that the proposed complex façade has a good light contribution with less absorption, while maintaining the outside view. In addition, the DGI is needed to test the out plane, because DGP is more suitable for lower luminance; therefore, each visual plane should be assessed regarding different visual comfort conditions, or parameters and methods. Accordingly, the mean DGI result of window combined by CFS is approximately lower in 5% than highly glazed façade. However, the DA of highly glazed is higher in 5%, but the DA of window combined by CFS is enough, above 80%. Definitely, the complex scene at restaurant with the proposed integrated façade system improves light performance and indoor atmosphere.
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