Articles publicats (Enginyeria Industrial i de l’Edificació)

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    Research progress, trends, roadmap, and new perspectives on radiative cooling towards practical applications
    (Elsevier, 2024) Mselle, Boniface Dominick; Medrano Martorell, Marc; Solé Cutrona, Cristian; Martorell, Ingrid; Castell, Albert
    This study assesses existing literature on radiative cooling through bibliometric and keyword analyses, shedding light on both quantitative and qualitative aspects of the subject. The research adheres to a systematic methodology, encompassing query formulation, data extraction, data curation, and analysis, accompanied by author interpretations and discussions. The evaluation encompasses the scrutiny of radiative cooling patents and scientific publications. For patents, trends, and geographic distribution are analyzed, while for scientific publications, a comprehensive overview of subtopics, subject areas, top journals of publication, distinctive trends, geographical distribution, affiliations, document types, and the central focus of previous studies are examined. From the results, the main questions on research diversity, dimensions, dominance, methodological approach, evolution, trends, and commercial relevance among others are discussed. From this investigation, it was found out that, although research on radiative cooling dates to the 1880 s, it is in the last decade when substantial growth was experienced across multiple disciplines. China and the United States of America emerged as the top contributors in this research domain.
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    Open Access
    Methodological framework for impact evaluation of Building‐Integrated Greenery (BIG‐impact)
    (Elsevier, 2024) Pérez Luque, Gabriel; Reyes, Marcelo; Coma Arpón, Julià; Alva, Aleix; Berigüete, Fanny E.; Lacasta Palacio, Ana María
    Building-Integrated Greenery systems, i.e., green roofs, walls, and facades, are Nature-based Solutions that make possible the renaturing of cities when there is no room for traditional greenery solutions. These green systems provide several ecosystem services at both the building and city level, such as urban heat island effect mitigation and noise reduction, support for biodiversity, runoff control, thermal and acoustic insulation, etc. However, once implemented in real cases, their impact is almost never evaluated. This fact limits the possibility of carrying out cost-benefit analyses that contribute to justifying their long-term maintenance, thus putting at risk their long-term sustainability and consequently the provision of benefits. Unlike existing approaches, the method presented here offers a comprehensive and practical tool that addresses the gap in BIG systems’ impact evaluation, facilitating informed decision-making and promoting the long-term sustainability of BIG systems. In its design, the current references at European and global level for building-integrated systems impact assessment has been considered. It is easily replicable in any real project and enables the collaboration of involved stakeholders. The method is unprecedented and allows a holistic assessment of the impact of BIG in real cases, in terms of ecosystem services provided.
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    Open Access
    Robust Control for a Battery Charger Using a Quadratic Buck Converter
    (Institute of Electrical and Electronics Engineers, 2024) López-Santos, Oswaldo; Torres Pinzón, Carlos Andrés; Flores Bahamonde, Freddy; Haroun, Reham; Garriga Castillo, Juan Antonio; Valderrama Blavi, Hugo; Martínez Salamero, Luis
    In this paper, the quadratic buck converter (QBC) is proposed as competitive alternative to implement a battery charger. Since QBC is a high order system, the required control is designed to follow the conventional constant-current constant-voltage protocol by means of three loops. Namely, 1) an inner-loop operating in sliding mode to control the current of the closest inductor to the input port providing the proper stability of the system, 2) a first outer loop designed to regulate the battery voltage providing the reference of the inner loop, and finally 3) a second outer loop to regulate the battery current modifying the reference of the voltage loop. Proportional Integral (PI) controllers are used in both outer loops, one of them synthesized by means of the robust loop shaping M-constrained integral gain optimization (RLS-MIGO) method, and the other designed using classical considerations for cascaded controllers. Both simulation and experimental results are presented validating the theoretical study and confirming the feasibility of the proposed control by means of analogue electronics.
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    Open Access
    The Role of Building-Integrated Greenery Systems in Building Sustainability Rating Systems
    (MDPI, 2024) Reyes, Marcelo; Pérez Luque, Gabriel; Coma Arpón, Julià
    Building rating systems allow for the evaluation of environmental buildings’ impact throughout their lifecycle, thereby enabling improved design. The integration of vegetation into building envelopes, through green roofs and facades, provides multiple benefits that enhance the sustainability of a built environment. In arid climates, Building-Integrated Greenery Systems (BIGSs) contribute to energy savings and the improvement of the urban environment through evaporative cooling. However, the maintenance of these green systems requires efficient water use. This study thoroughly reviews six selected building sustainability certifications to determine the extent to which BIGSs are considered in the certification process. The findings indicate that BIGSs are not yet well integrated directly into these certifications. While the certifications recognize the biophilic effects on users and contributions to sustainable construction, they often overlook scientifically proven benefits such as acoustic insulation and urban noise reduction. This study highlights the importance of updating certification frameworks to fully incorporate the diverse advantages of BIGSs, especially in enhancing indoor environments and achieving energy savings.
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    A Parcel Transportation and Delivery Mechanism for an Indoor Omnidirectional Robot
    (MDPI, 2024) Rubies, Elena; Bitriá, Ricard; Palacín Roca, Jordi
    Parcel transportation is a task that is expected to be highly automated with the development of application-specific mobile robots. This paper presents the design and implementation of a parcel transportation and delivery mechanism aimed at converting a general-purpose indoor omnidirectional robot into an indoor delivery robot. The design of this new mechanism has considered the best placement in the robot and the limitation of not exceeding the original robot diameter. The mechanism consists of a basket with a lid that allows for the manual loading and automatic unloading of parcels. Despite the space limitations imposed by the general-purpose robot design, the designed mechanism can transport up to 90% of the packages received in an educational building. The mechanism was empirically validated by conducting 125 static manual loading experiments, 150 static unloading experiments, and 50 complete parcel delivery experiments. Results show that the delivery robot can efficiently deliver 78% of the total packages received in the building: envelopes, very small parcels, and small parcels. In the case of medium parcels, the delivery was unsuccessful in 30% of cases, in which the parcel did not properly slide out of the basket.