This page has only limited features, please log in for full access.
Escuela Técnica Superior de Arquitectura de la Universidad Politécnica de Madrid
In the last decades, urban climate researchers have highlighted the need for a reliable provision of meteorological data in the local urban context. Several efforts have been made in this direction using Artificial Neural Networks (ANN), demonstrating that they are an accurate alternative to numerical approaches when modelling large time series. However, existing approaches are varied, and it is unclear how much data are needed to train them. This study explores whether the need for training data can be reduced without overly compromising model accuracy, and if model reliability can be increased by selecting the UHI intensity as the main model output instead of air temperature. These two approaches were compared using a common ANN configuration and under different data availability scenarios. Results show that reducing the training dataset from 12 to 9 or even 6 months would still produce reliable results, particularly if the UHI intensity is used. The latter proved to be more effective than the temperature approach under most training scenarios, with an average RMSE improvement of 16.4% when using only 3 months of data. These findings have important implications for urban climate research as they can potentially reduce the duration and cost of field measurement campaigns.
Miguel Núñez-Peiró; Anna Mavrogianni; Phil Symonds; Carmen Sánchez-Guevara Sánchez; F. Neila González. Modelling Long-Term Urban Temperatures with Less Training Data: A Comparative Study Using Neural Networks in the City of Madrid. Sustainability 2021, 13, 8143 .
AMA StyleMiguel Núñez-Peiró, Anna Mavrogianni, Phil Symonds, Carmen Sánchez-Guevara Sánchez, F. Neila González. Modelling Long-Term Urban Temperatures with Less Training Data: A Comparative Study Using Neural Networks in the City of Madrid. Sustainability. 2021; 13 (15):8143.
Chicago/Turabian StyleMiguel Núñez-Peiró; Anna Mavrogianni; Phil Symonds; Carmen Sánchez-Guevara Sánchez; F. Neila González. 2021. "Modelling Long-Term Urban Temperatures with Less Training Data: A Comparative Study Using Neural Networks in the City of Madrid." Sustainability 13, no. 15: 8143.
This paper presents an exploratory research about the possibilities to simulate the thermal performance of buildings with green roofs, or in this case rooftop farming. Different from the green roofs, a rooftop farming has a leaf area index (LAI) variable during all the year because the vegetable crops growing cycle repeats sometimes along the year. The contribution of this paper is to bring this discussion to the art state. The method uses computer simulation as a research strategy using the software Energy Plus. The research method was developed in 3 steps. In the first one, a literature review was performed in order to search data from 18 vegetable crops and 3 substrates. One of these data was the LAI, which in the second research step was simulated considering 5 different possibilities (LAI constant all the year; LAI observing monthly the growing cycle; Average LAI considering the growing cycle; crop rotation with average monthly LAI; and LAI defined each ten days considering the crop growing cycle). The results demonstrated that: a) the simplified LAI found in the literature considering the rooftop farming simulations are defined as constant; b) using LAI constant all the year can overestimate until 7% the energy use intensity (EUI) in buildings for the climate in the South of Brazil. c) Thus, in order to simulate the performance of buildings with rooftop farming it is important to develop a data base of the vegetable crop considering the LAI variation along the cycles, and also the number of cycles during the year.
Eduardo Grala da Cunha; Celina Maria Brito Correa; Roberta Peil; Viviane Mülech Ritter; Daniela Hohn; Helayne Maieves; Javier Neila González; Mariana Estima Silva; Rodrigo Karini Leitzke. Characterizing leaf area index of rooftop farm to assess thermal-energy performance by simulation. Energy and Buildings 2021, 241, 110960 .
AMA StyleEduardo Grala da Cunha, Celina Maria Brito Correa, Roberta Peil, Viviane Mülech Ritter, Daniela Hohn, Helayne Maieves, Javier Neila González, Mariana Estima Silva, Rodrigo Karini Leitzke. Characterizing leaf area index of rooftop farm to assess thermal-energy performance by simulation. Energy and Buildings. 2021; 241 ():110960.
Chicago/Turabian StyleEduardo Grala da Cunha; Celina Maria Brito Correa; Roberta Peil; Viviane Mülech Ritter; Daniela Hohn; Helayne Maieves; Javier Neila González; Mariana Estima Silva; Rodrigo Karini Leitzke. 2021. "Characterizing leaf area index of rooftop farm to assess thermal-energy performance by simulation." Energy and Buildings 241, no. : 110960.
In the search for methods to incorporate Phase Change Materials (PCM) into Portland cement mortar mixtures, PCM based on paraffins adhered to a silica-based matrix appear as a suitable option. However, paraffin particles have been observed to escape from the silica matrix when water is added. There are only limited data on how the use of such PCM affects the behaviour of mortars. To evaluate the effect of this PCM addition, Portland mortar mixtures were elaborated with 5%, 10% and 15% of PCM content, and using CEM 42.5 I R and CEM I 52.5 R cement types. Physical properties such as density, open porosity, air content and water absorption were analysed for fresh and dry samples. The results obtained show that the PCM-added mixtures require greater water and cement amounts than the standard mortar mixtures to achieve similar compressive strengths. Compared to non-PCM mixtures the PCM-added mortars present a density lowering of 37% for fresh mixtures and near 45% for dry state forms. A maximum compressive strength of 15.9 MPa was reached for 15% PCM mixtures, while values beyond 40 MPa were achieved for 5% PCM mixtures. Thus, the proposed study contributes to broad the available knowledge of PCM cement mortar mixtures behaviour and their mix design.
Vicente Zetola; Luis Claros-Marfil; Alfonso Santos; Fco. González. Effect of Paraffin and Silica Matrix Phase Change Materials on Properties of Portland Cement Mortars. Materials 2021, 14, 921 .
AMA StyleVicente Zetola, Luis Claros-Marfil, Alfonso Santos, Fco. González. Effect of Paraffin and Silica Matrix Phase Change Materials on Properties of Portland Cement Mortars. Materials. 2021; 14 (4):921.
Chicago/Turabian StyleVicente Zetola; Luis Claros-Marfil; Alfonso Santos; Fco. González. 2021. "Effect of Paraffin and Silica Matrix Phase Change Materials on Properties of Portland Cement Mortars." Materials 14, no. 4: 921.
Este trabajo de investigación se centra en el estudio teórico y experimental del microclima urbano de la plaza Chamberí de Madrid, ciudad con una marcada Isla de Calor. Para ello, se realizaron mediciones in-situ de temperatura superficial de materiales en fachadas, pavimentos y mobiliario urbano, de temperatura seca, humedad relativa del aire y de velocidad y dirección del viento en condiciones de soleamiento y sombreamiento. Se levantó el entorno, la vegetación, arbolado y materiales de acabado en 3D para desarrollar simulaciones de soleamiento y radiación solar. Paralelamente, se registró el uso que las personas hacían del espacio urbano. Finalmente se compararon los resultados con un estudio bioclimático tradicional que serviría para definir el confort. Se concluyó que las herramientas bioclimáticas son efectivas para el diseño de espacios confortables térmicamente, siempre y cuando se creen microclimas alternativos que den opción de adaptarse al entorno. Las mediciones de campo revelan la importancia de las propiedades térmicas de los materiales y la necesidad de realizar estudios de soleamiento para la selección y localización de materiales con diversas propiedades higrotérmicas y el correcto empleo de suelos naturales, vegetación y agua. Se observa que las estrategias teóricas para alcanzar el confort definidas mediante las herramientas tradicionales, en numerosasocasiones, no coincide con el uso real del espacio público. Además, se detectaron notables diferencias entre los datos climáticos históricos, los de la estación meteorológica estatal más cercana y las mediciones locales. Se detecta numéricamente el efecto de Isla de Calor Urbana en la plaza, respecto al parque del Retiro.
Nagore Urrutia del Campo; Javier Neila González. Bioclimática, mediciones ambientales y uso de los espacios urbanos: Evaluación comparativa en la Plaza de Chamberí, Madrid. REVISTARQUIS 2019, 9, 1 -26.
AMA StyleNagore Urrutia del Campo, Javier Neila González. Bioclimática, mediciones ambientales y uso de los espacios urbanos: Evaluación comparativa en la Plaza de Chamberí, Madrid. REVISTARQUIS. 2019; 9 (1):1-26.
Chicago/Turabian StyleNagore Urrutia del Campo; Javier Neila González. 2019. "Bioclimática, mediciones ambientales y uso de los espacios urbanos: Evaluación comparativa en la Plaza de Chamberí, Madrid." REVISTARQUIS 9, no. 1: 1-26.
Energy poverty affects an increasing number of households in the European Union. It is urgent the development of definitions and methods adapted to regional conditions that gather important housing construction and climatic differences between Northern and Southern countries beyond different income levels. Mainstream energy poverty methods are focused on heating requirements influenced by health risks derived from living in cold homes. However, the evaluation of energy poverty in warmer climates must also consider health impacts related to households’ exposure to indoor overheating and consequent cooling needs that will likely be exacerbated by temperature increase due to climate change. The present research is aimed at developing a method for evaluating energy poverty in low income dwellings adapted to the Spanish context that gathers climatic, building and socioeconomic particularities of the country. The research was conducted through the evaluation of three representative social housing blocks of vulnerable households located in three different climates and regions. The proposed method is focused on the energy expenditure required to achieve minimal thermal habitability conditions in low income dwellings. Hence, both heating and cooling needs are appraised according to adaptive comfort criteria. The resulting method constitutes a useful tool for the identification of households suffering from energy poverty as well as the degree of the need they require. Finally, the method poses an aid in the decision-making processes related to dwelling energy retrofitting actions and policy development.
Carmen Sánchez-Guevara Sánchez; Fco. Javier Neila González; Agustín Hernández Aja. Energy poverty methodology based on minimal thermal habitability conditions for low income housing in Spain. Energy and Buildings 2018, 169, 127 -140.
AMA StyleCarmen Sánchez-Guevara Sánchez, Fco. Javier Neila González, Agustín Hernández Aja. Energy poverty methodology based on minimal thermal habitability conditions for low income housing in Spain. Energy and Buildings. 2018; 169 ():127-140.
Chicago/Turabian StyleCarmen Sánchez-Guevara Sánchez; Fco. Javier Neila González; Agustín Hernández Aja. 2018. "Energy poverty methodology based on minimal thermal habitability conditions for low income housing in Spain." Energy and Buildings 169, no. : 127-140.
Para determinar el comportamiento energético de los edificios los programas de simulación dinámica son utilizados como métodos de cálculo. Sin embargo, numerosos estudios han mostrado que existen diferencias notables entre el comportamiento esperado y real de los edificios. Uno de los factores identificados como fuente de incertidumbre en la simulación de edificios es la ocupación y el comportamiento de los usuarios. Estos parámetros son definidos habitualmente con estándares que no reflejan la realidad de los ocupantes. En este artículo, se presenta una investigación sobre la influencia del comportamiento y la presencia de los usuarios de edificios residenciales en la demanda de energía. Para ello se generan modelos de simulación energética cuyos valores de entrada están ajustados con datos monitorizados de edificios reales. El estudio se realiza en dos casos de estudio ubicados en Madrid, España.
E. Cuerda; O. Guerra-Santin; F. J. Neila González. Definiendo patrones de ocupación mediante la monitorización de edificios existentes. Informes de la Construcción 2017, 69, 223 .
AMA StyleE. Cuerda, O. Guerra-Santin, F. J. Neila González. Definiendo patrones de ocupación mediante la monitorización de edificios existentes. Informes de la Construcción. 2017; 69 (548):223.
Chicago/Turabian StyleE. Cuerda; O. Guerra-Santin; F. J. Neila González. 2017. "Definiendo patrones de ocupación mediante la monitorización de edificios existentes." Informes de la Construcción 69, no. 548: 223.
Buildings Indoor Air Quality requires a control in the Relative Humidity parameter. In passive architecture in humid climates relative humidity is even more important for human comfort and difficult to control. Therefore, nowadays, there is a research on dehumidifying systems. The present article shows an innovative dehumidifying panel composed of a plaster and Calcium Chloride salt. Laboratory tests are carried out to establish its viability as an indoor air moister regulator integrated in common plaster building interior coatings. There are two types of tests that have been carried out in two consecutive empirical phases: in the first phase, the tests of characterization of the Calcium Chloride as a desiccant are carried out; in a second phase, the dehumidifying panel as a whole is tested. Finally, both types of empirical tests show the efficiency and viability as an air moisture passive control system.
Sofía Melero-Tur; Soledad García-Morales; Francisco Javier Neila-González. Design and evaluation of a dehumidifying plaster panel for passive architecture integration. Revista de la construcción 2015, 14, 21 -28.
AMA StyleSofía Melero-Tur, Soledad García-Morales, Francisco Javier Neila-González. Design and evaluation of a dehumidifying plaster panel for passive architecture integration. Revista de la construcción. 2015; 14 (2):21-28.
Chicago/Turabian StyleSofía Melero-Tur; Soledad García-Morales; Francisco Javier Neila-González. 2015. "Design and evaluation of a dehumidifying plaster panel for passive architecture integration." Revista de la construcción 14, no. 2: 21-28.