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Keywords = polar heliostat

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21 pages, 5872 KiB  
Article
Design and 3D Manufacturing of an Improved Heliostatic Illuminator
by Marta Varo-Martínez, José C. Ramírez-Faz, Jesús López-Sánchez, Manuel Torres-Roldán, Luis Manuel Fernández-Ahumada and Rafael López-Luque
Inventions 2022, 7(4), 127; https://doi.org/10.3390/inventions7040127 - 19 Dec 2022
Cited by 4 | Viewed by 2737
Abstract
Increasing daylighting levels contributes to improving the energy efficiency of buildings and consequently to the fight against climate change. This work presents a new illuminator based on a previous single-axis polar heliostat. This heliostat allows redirecting sunlight to a specific space to be [...] Read more.
Increasing daylighting levels contributes to improving the energy efficiency of buildings and consequently to the fight against climate change. This work presents a new illuminator based on a previous single-axis polar heliostat. This heliostat allows redirecting sunlight to a specific space to be illuminated at any time of the day. The system presented is simple but compact in size. It has been manufactured by 3D printing with recyclable PETG plastics. Three-dimensional printing has allowed reduction of the mass of the system to less than 5 kg, which means high stability and manageability. Moreover, the system has been provided with an assembly structure that facilitates its correct installation by a single operator. The result is a heliostatic illuminator with an average pointing error of 10 mrad, an acceptable error for urban applications. Finally, a low-cost and high-replicability device has been achieved, which makes it an easily reproducible illuminator and favors its extensive installation. Full article
(This article belongs to the Collection Feature Innovation Papers)
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18 pages, 5304 KiB  
Article
Use of Polar Heliostats to Improve Levels of Natural Lighting inside Buildings with Little Access to Sunlight
by Luis Manuel Fernández-Ahumada, Maximiliano Osuna-Mérida, Jesús López-Sánchez, Francisco Javier Gómez-Uceda, Rafael López-Luque and Marta Varo-Martínez
Sensors 2022, 22(16), 5996; https://doi.org/10.3390/s22165996 - 11 Aug 2022
Cited by 6 | Viewed by 2860
Abstract
The growing need to increase environmental and energy sustainability in buildings (housing, offices, warehouses, etc.) requires the use of solar radiation as a renewable source of energy that can help to lower carbon footprint, making buildings more efficient and thereby contributing to a [...] Read more.
The growing need to increase environmental and energy sustainability in buildings (housing, offices, warehouses, etc.) requires the use of solar radiation as a renewable source of energy that can help to lower carbon footprint, making buildings more efficient and thereby contributing to a more sustainable planet, while enhancing the health and wellbeing of its occupants. One of the technologies deployed in the use of solar energy in buildings is heliostats. In this context, this paper presents an analysis of the performance of a heliostat illuminator to improve illumination in a classroom at the Campus of Rabanales of the University of Cordoba (Spain). A design of a system in charge of monitoring and measuring daylighting variables using Arduino hardware technology and free software is shown. This equipment develops the communications, programming and collection of lighting data. In parallel, installation of an artificial lighting system complementary to the natural lighting system is implemented. Finally, an analysis of the impact of the proposed solution on the improvement of energy efficiency is presented. Specifically, it is estimated that up to 64% of savings in artificial lighting can be achieved in spaces with heliostatic illuminators compared to those without them. Full article
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