Impact of Different Illuminance Typical Years Models on a Climate Based Method for the Calculation of Artificial Lighting Energy Use in Office Buildings

Artificial lighting has a relevant impact on the electricity uses in not residential buildings. The method to assess such uses is based on standards, which hardly take into account the daylighting contribution and the time evolution of the outdoor illuminance conditions. Different models were adopted to build diffuse illuminance reference years, starting from satellite images. These models lead to different daylight availability during the year. The paper explores the impact that these models have on the artificial lighting energy uses by hourly monthly mean calculations. The test was carried out with a climate based method, which takes into account: the outdoor luminous environment, the reference indoor visual task and the building daylight characteristics. A typical office building was used for the test in Rome, Italy. Results allowed to compare the impact of each model and to select the most suitable one to be implemented in the climate based method to predict artificial lighting use in buildings

impact of different luminous efficacy models on the calculation of lighting energy uses in non residential buildings

Abstract Artificial lighting has a relevant impact on the electricity uses in non-residential buildings. The calculation method introduced in the relevant EN standards takes into account, only to some extent, the daylighting role on the lighting performances of buildings. An alternative method is under development for the Italian territory, which introduces a climate based approach to properly estimate the day light contribution. The method requires the implementation outdoor global and diffuse illuminance Typical Meteorogical Years (TMY), which calculated starting from solar irradiation data and luminous efficacy models. Different models can be used for this purpose, consequently these differences may lead to different estimates of daylight availability in buildings during the year. This paper explores the impact of different luminous efficacy models on the lighting energy uses in non-residential buildings. A typical office building is used for the study and calculations are carried out for three localities of the Italian territory. The outdoor luminous environment, the reference indoor visual task and the building daylight characteristics are taken into account. Results allow to compare the energy lighting performance of the building applying the different luminous efficacy models and, as a consequence, to select the most suitable model to be used in a climate based artificial lighting calculation method

Caso familiar de nevo branco esponjoso oral: uma rara condição hereditária Familial case of oral white sponge nevus: a rare hereditary condition

O nevo branco esponjoso é uma desordem autossômica dominante, caracterizada por placas brancas difusas, rugosas, que afetam principalmente a mucosa bucal. A condição tem um alto grau de penetrância e expressividade variada, embora os relatos familiais sejam incomuns. Este artigo relata um caso familiar de nevo branco esponjoso em que duas irmãs são afetadas por esta condição<br>White sponge nevus (WSN) is an autosomal dominant skin disorder characterized by white, corrugated and diffuse plaques mainly affecting the oral mucosa. The condition has a high penetrance and variable expressivity, but familial reports are uncommon. This report presents a familial case of WSN in which two sisters are affected by the disorde