https://hdl.handle.net/10259/9655 2026-04-28T06:57:24Z https://hdl.handle.net/10259/9722 Indoor daylight model for all-sky-type luminance patterns Granados López, Diego; García Fuente, Manuel; González Peña, David; Diez Mediavilla, Montserrat; Alonso Tristán, Cristina Daylighting is a design concept of buildings recognized as a key strategy in reducing the energy consumption and improving visual comfort and well being of their occupants. According to the International Energy Agency (IEA), artificial lighting makes up 14% of electrical consumption in the European Union and 19% worldwide. In addition to improve the energy efficiency of buildings, it has been demonstrated that daylighting has positive effects on human health and productivity. Energy standards strongly recommend incorporating daylighting strategies into building design. However, daylighting design is complex due to its changing nature. Likewise improving the occupants' life, daylight implementation is also related to technical and architectural solutions such as heating and cooling. Therefore, it is necessary balancing the positive health effects and energy savings in artificial lighting with the the possible thermal and visual discomfort caused by excessive sunlight penetrations and glare. Comunicación presentada en: XII Congreso Nacional y III Internacional de Ingeniería Termodinámica (12 CNIT), June 19- July 1, Madrid (Spain) 2022-01-01T00:00:00Z https://hdl.handle.net/10259/9721 Analysis of low-cost sensors for solar illuminance measurement Guillán Lorenzo, Omar; Suárez García, Andrés; González Peña, David; Granados López, Diego; García Fuente, Manuel Energy efficiency is one of the biggest concerns nowadays. During the last months, a drastic increase of the electrical energy prices has been seen. The main causes are two: the strong revaluation of natural gas on international markets and the rise of the CO2 emission market prices. Therefore, reducing dependence on fossil fuels is a matter of urgency. The reduction of electricity consumption would help in following this direction. The use of natural illumination in buildings could play a vital role for decreasing the energy dependency, hence it is essential to measure the solar illuminance. Professional sensors cost hundreds of euros. This work compares several illuminance sensors for Internet of Things (IoT) projects against a professional one. The former ones cost just a few euros. The results show good precision and regular accuracy. Comunicación presentada en: XII Congreso Nacional y III Internacional de Ingeniería Termodinámica (12 CNIT), June 19- July 1, Madrid (Spain) 2022-01-01T00:00:00Z https://hdl.handle.net/10259/9720 Compact climatization system for mechanical ventilation with heat recovery González Peña, David; García Fuente, Manuel; Granados López, Diego; Alonso Tristán, Cristina Nearly zero energy (NZEB) or PASSIVHAUSS buildings are characterized by a very low energy consumption to meet the needs of air climatization (cooling and heating). Although in the design philosophy of these buildings, air conditioning and heating systems would be unnecessary, in some climatic regions, mainly due to user requirements, equipment such as geothermal or aerothermal heat pumps is usually installed. This type of house is conceived from the design stage to achieve high energy efficiency. The orientation of the building and distribution of windows and facades are studied in detail to reduce the building's energy demand by taking advantage of solar radiation in winter and avoiding overheating during summer. Another important aspect is the excellent insulation of the building envelope, reducing heat losses to the environment. Comunicación presentada en: XII Congreso Nacional y III Internacional de Ingeniería Termodinámica (12 CNIT), June 19- July 1, Madrid (Spain) 2022-01-01T00:00:00Z https://hdl.handle.net/10259/9719 Comparison of spatial interpolation methods for the estimation of solar potential in Castilla y León Garrachón Gómez, Elena; García Rodríguez, Ana; García Rodríguez, Sol; Dieste Velasco, Mª Isabel; Alonso Tristán, Cristina Solar radiation is one of the most relevant and influential climatic variables in the interactions of the Earth System, as it is a determining factor for the development of many processes and disciplines in different fields such as agriculture, transport, architectural design, or renewable energies. Among renewable energies, one of the most representative is solar energy. Many countries, such as Spain, have a high potential for photovoltaic energy production. For some years now, research has been carried out on designing and implementing these systems in an integrated way to maximise their use. The spatio-temporal distribution of Global Horizontal Irradiance (GHI) and other variables derived from it, such as Photosynthetically Active Radiation (PAR), provide valuable information as it can be used, among other things, to estimate plant growth or to prevent environmental or biological risks. Comunicación presentada en: XII Congreso Nacional y III Internacional de Ingeniería Termodinámica (12 CNIT), June 19- July 1, Madrid (Spain) 2022-01-01T00:00:00Z