F. Javier Neila González

F. Javier Neila González


Research Focus & Metrics

Academic Career Length

12Years (2015-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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15 February 2021 in Materials
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Journal Article
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VZVicente Zetola
Vicente Zetola
LCLuis J. Claros-Marfil
Luis J. Claros-Marfil
AGAlfonso García-Santos
Alfonso García-Santos
FGF. Javier Neila González
F. Javier Neila González
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.

30 December 2017 in Informes de la Construcción
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ECE. Cuerda
E. Cuerda
OGOlivia Guerra-Santin
Olivia Guerra-Santin
FGF. Javier Neila González
F. Javier Neila González
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.

21 July 2021 in Sustainability
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MNMiguel Núñez-Peiró
Miguel Núñez-Peiró
AMAnna Mavrogianni
Anna Mavrogianni
PSPhil Symonds
Phil Symonds
Carmen Sánchez-GuevaraCarmen Sánchez-Guevara
Carmen Sánchez-Guevara
FGF. Javier Neila González
F. Javier Neila González
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.

1 August 2015 in Revista de la construcción
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SMSofía Melero-Tur
Sofía Melero-Tur
SMSoledad García Morales
Soledad García Morales
FGF. Javier Neila González
F. Javier Neila González
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.

1 June 2021 in Energy and Buildings
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ECEduardo Grala da Cunha
Eduardo Grala da Cunha
CCCelina Maria Brito Correa
Celina Maria Brito Correa
RPRoberta Peil
Roberta Peil
VRViviane Mülech Ritter
Viviane Mülech Ritter
DHDaniela Hohn
Daniela Hohn
RLRodrigo Karini Leitzke
Rodrigo Karini Leitzke

31 December 2019 in REVISTARQUIS
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NCNagore Urrutia del Campo
Nagore Urrutia del Campo
FGF. Javier Neila González
F. Javier Neila González
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.