Evaluación de Ventanas Fotovoltaicas con Concentradores Solares Luminiscentes para Edificios Cero-energía en Santiago de Chile

Glasses with luminescent solar concentrators (LSC) allow to develop windows with perimeter photovoltaic collection, as building- integrated photovoltaics (BIPV). This work assesses its application in office buildings in Santiago de Chile, to contribute in zero-energy goals, reviewing energy plans for building in Europe and Chile, zero-energy concepts in buildings and defining a study model in Santiago de Chile. Then the performance and energy generation are simulated with different constructive properties, layout and efficiency of the windows. The analysis suggests that this technology, when used in wide areas over the sunniest façades, can provide up to 40% of building consumption, for longitudinal buildings with energy-efficient envelope and equipment, in addition to contributing to shading. It is thus demonstrated that, by regulating the building and forming large windows adequately arranged, this technology can contribute significantly to reach zero-energy buildings goals.Los vidrios con concentradores solares luminiscentes (LSC) permiten plantear ventanas con recolección fotovoltaica perimetral, como elementos integrados en la edificación (BIPV). Este trabajo evalúa su aplicación en edificios de oficina en Santiago de Chile, para aportar en metas de cero-energía, revisando primeramente los planes energéticos para la edificación en Europa y Chile, los conceptos de cero-energía en edificios y definiendo un modelo de estudio en Santiago de Chile. Luego se simula el rendimiento y generación energética con distintas propiedades constructivas, disposición y eficiencia de las ventanas. El análisis sugiere que esta tecnología, dispuesta en extensiones amplias hacia la fachada soleada, puede otorgar hasta un 40% del consumo para edificios longitudinales con envolvente y equipamientos eficientes, además de contribuir al sombreamiento. Se demuestra por tanto que, regulando la edificación y conformando ventanas extensas adecuadamente dispuestas, esta tecnología puede contribuir significativamente a alcanzar las metas de edificios cero-energía

Subclinical Liver Disease Is Associated with Subclinical Atherosclerosis in Psoriasis: Results from Two Observational Studies.

Psoriasis is associated with a higher risk of liver diseases. We investigated the impact of hepatic steatosis (European cohort) and hepatic inflammation (United States cohort) on subclinical atherosclerosis. In the European cohort (n = 76 psoriasis participants and 76 controls), nonalcoholic fatty liver disease, assessed by the sonographic hepatorenal index, was more prevalent in psoriasis than in controls (61% vs. 45%; P = 0.04). Participants with psoriasis with nonalcoholic fatty liver disease had a higher prevalence of subclinical atherosclerosis (ultrasonographic presence of plaque in femoral or carotid arteries) than participants with psoriasis without nonalcoholic fatty liver disease (61% vs. 23%; P = 0.006) and controls with nonalcoholic fatty liver disease (61% vs. 32%; P < 0.05). Sonographic hepatorenal index was a determinant of subclinical atherosclerosis in psoriasis (OR = 3.5; P = 0.01). In the United States cohort (n = 162 participants with psoriasis who underwent positron emission tomography and coronary computed tomography angiography), those with high hepatic 2-[fluorine-18]fluoro-2-deoxy-D-glucose uptake had higher noncalcified (1.3 [0.49 mm2] vs. 1.0 [0.40 mm2]), fibrofatty (0.23 [0.15 mm2] vs. 0.11 [0.087 mm2]), and lipid-rich necrotic core (4.3 [2.3 mm2] vs. 3.0 [1.7 mm2]) coronary burden (all P < 0.001). Hepatic 2-[fluorine-18]fluoro-2-deoxy-D-glucose uptake associated with noncalcified (β = 0.28; P < 0.001), fibrofatty (β = 0.49; P < 0.001), and lipid-rich necrotic core (β = 0.28; P = 0.003) burden. These results show the downstream cardiovascular effects of subclinical liver disease in psoriasis.pre-print723 K