Congresos últimos 10 años

Esquivias, P.M.(2011, 21 de noviembre). Maximizing the use of Daylight.

CONGRESO: International Workshop "Orange and Green"

CIUDAD: Sevilla (Spain)

ABSTRACT:

We know the energy consumption of a building is mainly derived from thermal systems but we can’t forget that electric lighting is the main consumer of small shops and large shopping and second-order energy in office buildings, schools and sports centers. If we can do anything to consume less electric lighting, we contribute to reduce energy consumption.
As architects, when we design our façades, our spaces, we place windows as we feel. When we consider about environmental aspects, we usually take care about transmittance, but what about light? The main purpose of a window is to give light to space, to allow us see the exterior, its paper on ventilation is achieving relevance, but we usually define its transmittance and its solar factor.
If we want to consider lighting aspects to place or to define the windows on our façade, we’ll find literature about the deep of our space related to window height, but little more. We know that the availability of daylight depends of so many factors: latitude, orientation, obstructions around the building, and, of course, depends of climatology, but there are tools to consider it through weather files. These factors don’t depend of our design, but we can define how much windows, how much glazing area related to floor area, how protect our glazing area from direct solar radiation, and other factors.
Places like South Europe have the trouble of much light and much solar radiation. With my research I’m trying to characterize various configurations of fenestrations related to geometry of theorical studied space in terms of daylighting and complementary in terms of thermal load in this space. The objective is to achieve lighting comfort in balance with the thermal load from solar radiation that pass through fenestration.
I work with comparative analysis of various parameters related to a reference model. I’m studying the effect of change orientation, azimuth, relative glazing area, window shape, exterior floor reflectance, elements of solar control and obstructions around the building.
To do this I work with climate-based daylight modeling and compare static daylight metrics like Daylight Factor and dynamic daylight metrics like Useful Daylight Index or Daylight Availability. I also work with Whole Building Energy Simulation software to characterize how much solar radiation is passing through glazing for each parameter I’m studying.