305 research outputs found
Diario de Campo: Boletín Interno de los investigadores del área de Antropología. 83 (2006) abril. Diario de Campo
No full text- Imágenes y música al unísono por Marina Alonso Balaños. - Los cargos religiosos entre los totonacos de Zozocolco de Hidalgo, Veracruz por Elizabeth Peralta González. - Paisaje, patrimonio y pobreza. Reinventando la Sierra Gorda queretana por Diego Prieto Hernández y David Alejandro Vázquez Estrada. - Integralidad: obstáculos,balbuceos y espejismos en Chimalacatlán, Morelos por Paul Herch Martínez. - Chalcatzingo: Crónica de la lucha por el patrimonio por Mario Córdova Tello, Ramón Lepez Vela. - Actualidades de la arqueología y la antropología física forense: un acercamiento intradisciplinario en México para el combate contra el crimen por Jorge Arturo Talavera González y Juan Martín Rojas Chávez. - Objetos de la princesa Carlota por María Hernández Ramírez. - El nuevo sentido nacional por Saúl Millán
Uncertainty Analysis for In-situ Fan Curve Calibration in Variable Air Volume Systems
No full textIn order to obtain in-situ fan performance curves for variable air volume (VAV) air handling units (AHUs) with predicted uncertainties, airflow measurements for an extended time and a tailored calibration procedure were proposed and validated in this work.
To obtain airflow measurement for an extended time, traverse measurements through the Equal-Area method were first conducted to select 3 sampling points (3-P) that represented the average velocity at a measurement plane. Next, through statistical analysis, additional uncertainty generated when reducing the number of sampling points was accounted for in terms of sampling time, reduced number of sampling points, measurement location, and comparison to common airflow measurement stations (AFMS). As a result of these analyses, it was found that for sampling times of 60 seconds, uncertainties below 5% can be expected from 3-P measurements when airflow velocity is above 800 fpm. Analysis showed that for return air (RA) measurements where velocities below 800 fpm are common, more than 3-P would be necessary to comply with 5% accuracy per ASHRAE Standard 111 [2008] requirements.
Next, it was demonstrated through comparison of measurement conditions and uncertainties for supply air (SA) that a relationship between measurement location and uncertainty of the 3-P measurement exists. Finally, the results showed that AFMS utilized more sampling points than necessary to achieve 5% accuracy in every test case. Performing airflow measurements with a tailored selection of sampling points was more effective than following cross-sectional area-based industry guidelines.
Upon the completion of the airflow uncertainty analyses, a calibration procedure for VAV AHUs was also produced and tested to obtain in-situ fan performance curves. In addition, based on the ANSI/ASHRAE Standard 51 [1999], an uncertainty analysis was performed on adjusted measurements by fan laws to build in-situ fan performance curves. Uncertainty bands at 95% confidence showed that previously defined airflow measurement uncertainty is the most sensible variable. Results showed that while application of fan laws can be applicable to return fans (RFs), higher uncertainties can be expected as airflow velocities below 800 fpm are common. Nevertheless, since SA average velocities were generally above 800 fpm, narrow uncertainty intervals were observed.
In conclusion, a practical and reliable approach for in-situ fan performance curves calibration was explored using statistical analysis and uncertainty propagation of airflow, fan head, and fan power uncertainties. Airflow measurements for extended sampling times were successfully achieved after developing a prototype holding bracket design for reducing field technician dependency. Finally, a VAV AHU calibration procedure for obtaining in-situ fan performance curves with actual range and visible system effect impacts was successfully applied and validated through this thesis work
Desarrollo de motor de informes IoT
No full textEn el presente Trabajo de Fin de Grado (TFG) se desarrolla una solución tecnológica destinada a resolver el problema identificado en la empresa Alibérico relacionado con la generación manual de gráficas y sus informes correspondientes. La metodología que se propone da lugar a una automatización de este proceso incrementando la eficiencia y reduciendo la posibilidad de que ocurran errores humanos. Además, se incorpora una capa de autenticación robusta que garantiza la seguridad del sistema junto con una gestión de los niveles de acceso que se adaptan a las necesidades específicas de la empresa. Este sistema cuenta con una arquitectura basada en 3 componentes principales, un cliente web desarrollado con el Framework Angular al que se podrá acceder para generar estas gráficas, un servidor que contiene una API desarrollada en Node.js para la visualización y extracción de las variables de la base de datos, y la base de datos MySQL que servirá como almacenamiento de los datos locales que conlleva el ámbito local. Además de estos componentes locales, el proyecto cuenta con una conexión al servidor remoto de Alibérico para obtener los datos de la red de sensores de la empresa en tiempo real, junto con 2 conexiones a repositorios privados en la nube de Azure DevOps para llevar un control de versiones del Front-End y del Back-End.In this Final Degree Project, a technological solution is developed to address the issue identified in the company Alibérico related to the manual generation of graphs and their corresponding reports. The proposed methodology leads to the automation of this process, increasing efficiency and reducing the possibility of human errors. Additionally, a robust authentication layer is incorporated to ensure system security, along with an access level management system that adapts to the company's specific needs. This system is based on an architecture consisting of three main components: a web client developed using the Angular Framework, which can be accessed to generate these graphs, a server that contains an API developed in Node.js for the visualization and extraction of variables from the database, and the MySQL database, which will serve as storage for the local data within the defined scope. In addition to these local components, the project includes a connection to Alibérico's remote server to obtain real-time data from the company's sensor network, along with two connections to private repositories in Azure DevOps' cloud to manage version control for both the Front-End and the Back- End
Desarrollo de motor de informes IoT
No full textEn el presente Trabajo de Fin de Grado (TFG) se desarrolla una solución tecnológica destinada a resolver el problema identificado en la empresa Alibérico relacionado con la generación manual de gráficas y sus informes correspondientes. La metodología que se propone da lugar a una automatización de este proceso incrementando la eficiencia y reduciendo la posibilidad de que ocurran errores humanos. Además, se incorpora una capa de autenticación robusta que garantiza la seguridad del sistema junto con una gestión de los niveles de acceso que se adaptan a las necesidades específicas de la empresa. Este sistema cuenta con una arquitectura basada en 3 componentes principales, un cliente web desarrollado con el Framework Angular al que se podrá acceder para generar estas gráficas, un servidor que contiene una API desarrollada en Node.js para la visualización y extracción de las variables de la base de datos, y la base de datos MySQL que servirá como almacenamiento de los datos locales que conlleva el ámbito local. Además de estos componentes locales, el proyecto cuenta con una conexión al servidor remoto de Alibérico para obtener los datos de la red de sensores de la empresa en tiempo real, junto con 2 conexiones a repositorios privados en la nube de Azure DevOps para llevar un control de versiones del Front-End y del Back-End.In this Final Degree Project, a technological solution is developed to address the issue identified in the company Alibérico related to the manual generation of graphs and their corresponding reports. The proposed methodology leads to the automation of this process, increasing efficiency and reducing the possibility of human errors. Additionally, a robust authentication layer is incorporated to ensure system security, along with an access level management system that adapts to the company's specific needs. This system is based on an architecture consisting of three main components: a web client developed using the Angular Framework, which can be accessed to generate these graphs, a server that contains an API developed in Node.js for the visualization and extraction of variables from the database, and the MySQL database, which will serve as storage for the local data within the defined scope. In addition to these local components, the project includes a connection to Alibérico's remote server to obtain real-time data from the company's sensor network, along with two connections to private repositories in Azure DevOps' cloud to manage version control for both the Front-End and the Back- End
Coolfacade: Architectural Integration of Solar Cooling Technologies in the Building Envelope
No full textIncreasing cooling demands in the built environment present an important and complex challenge for the design of sustainable buildings and cities. Even though the first course of action should always aim to reduce energy consumption through saving measures and passive design; these are often not enough to avoid mechanical equipment altogether, particularly in the case of office buildings in warm climate contexts. Solar cooling technologies have been increasingly explored as an environmentally friendly alternative to harmful refrigerants used in common air-conditioning systems; besides being driven by renewable energy. Nonetheless, building application remains mostly limited to demonstration projects and pilot experiences.The thesis discusses the suitability of solar cooling technologies in terms of their potential for façade integration, exploring current possibilities and identifying main constraints for the development of solar cooling integrated architectural products. The potential for façade integration is assessed considering both the architectural requirements for the integration of building services in the façade development process; and the potential climate feasibility of self-sufficient integrated concepts, matching current technical possibilities with cooling requirements from several climates.Although interesting prospects were identified in this dissertation, important technical constraints need to be solved to conceive fail-tested façade components. Furthermore, several barriers related to the façade design and development process need to be tackled in order to introduce architectural products such as these into the market. The identification and discussion of these barriers, along with the definition of technology driven development paths and recommendations for the generation of distinct architectural products, are regarded as the main outcomes of this dissertation, serving as a compass to guide further explorations in the topic under an overall environmentally conscious design approach.A+BE | Architecture and the Built Environment No 29 (2018)Design of Construtio
RAC Facades: Retrofit Active Cooling Facade System for Tropical High-rise Residential Buildings
No full textThe aim of this paper is to design a retrofit façade-integrated cooling system for built high-rise residential public housing buildings in the tropical climate and evaluate its feasibility. Literature research into the climate, building design, cooling technologies and case studies of façade-integrated systems were important factors that led to the conceptual designs. Energy calculations and parametric optimization through Rhinoceros + Grasshopper were conducted to develop the façade concepts to suit the cooling load of the chosen building. Material and component costs were calculated to evaluate which façade concept proposal was more suitable and what design constraints were introduced by the limited available physical space. With a chosen façade concept, minor tweaks were made to account for additional issues such as conduction heat loss and the oversizing of components. Façade details with respect to structural elements, moving parts, system operation and maintenance procedures were developed. The overall implications and limitations of the design were discussed with the aid of daylighting simulations and extrapolative calculations to paint a broader picture of its overall feasibility and what it takes to be realized.Architecture, Urbanism and Building Sciences | Building Technology | Sustainable Desig
'Desigrated': Desiccant Integrated Facade System
No full textDesigrate’ is designed to serve as a façade component of office buildings. Therefore, the building technology aspect of climate, façade detailing, and façade assembly is thoroughly discussed, optimized and evaluated to provide a product which acts efficiently as a cooling system and enhances the insulation of the building. Hence serving as a cooling strategy both actively and passively. Furthermore, as the façade system is specifically designed for the hot and humid climate of Bangkok, both climate and cultural context are crucial aspects in designing the system. The design concept of the façade system is based on a vernacular approach to enhance the cultural value of the product which aims to reflects the “Thainess” identity to the built environment.COOL FacadeArchitecture, Urbanism and Building Science
Bioreceptive facade design: Improving the harsh urban climates
No full textBioreceptivity in building envelopes is a new type of facade greening system which thrives to improve the urban climate. In this type of facade greening the building envelope acts as a mediating layer between indoor and external conditions. This research focuses on the impact of the implementation of bioreceptive facade panels in the urban climate of The Netherlands; this includes designing in the urban climate and measuring what benefits these plants can bring, and how they can contribute to their own existence in their habitat.Architecture, Urbanism and Building Sciences | Building Technology | Sustainable Desig
Geometrically articulated Bio-receptive concrete facades
No full textBio-receptivity is a natural growth of small plant species on stony surfaces with minimum external influence. It is commonly found around us on old buildings, crevices and corners, damp and moist areas. Bio-receptivity has always been viewed as a negative phenomenon in the public eye due to its random and shabby growth conditions. However, this phenomenon co-exists on building surfaces establishing a hybrid relationship, which poses several advantages on the building life-cycle. Apart from being a protective coating, its environmental benefits, like CO2 reduction in air, air purification through dust removal and cooling effect through evapotranspiration, has been known and researched through decades, but has not been brought into practice in the building industry. This research chooses to use geometry as a design variable to engineer self-sustaining moss growth on concrete panels in an ordered and systematic manner. The exercise is an attempt to not only address the functional aspect of Bio-receptivity but also its aesthetic quality which is vital to influence the perception of people and promote mass use of this new type of sustainable concrete material. The primary intend of the research is to gain a thorough understanding into the concept of Bio-receptivity and identify the governing factors responsible for the relationship between the small plant species and stony materials. Saxicolous moss like Tortula muralis and Grimmia Pulvinata are found to be the most common moss types growing on limestone base stony materials and is further utilized in the practical experiment. The research is conducted in a top-down approach, where first the designs are developed in an ordered system taking into consideration the growth structure of moss in nature and the influencing environmental characteristics, next the designs are fabricated into prototypes exhibiting the appropriate material properties and then validated through series of practical experimentation and CFD simulations to justify the influence of geometry; based on the comparative analysis of the results a general design guideline is provided for a self-sustaining Bio-receptive concrete facade panel. A real-time visual representation of Bio-receptive panel is presented as per the guidelines and an economically viable and technically feasible facade system is proposed to facilitate its commercial use on buildings/facades.Architecture, Urbanism and Building Science
Bioreceptive Urban Facades: Integration of Bryophytes Into Facades and Their Impact on Exterior Building Temperatures
No full textRapidly expanding urban developments are having an inverse relationship on the surrounding urban environment. Facades and the materials that they are composed of can have a large impact on the warming of urban microclimates. By reducing or cooling the external surfaces of a facade a building maybe able to offset its contribution to the urban heat island effect. The thesis will help quantify the theoretical impact that this new living facade system can have on external surface temperatures. However, because this is a new facade technique, developing the facade design will also generate the guidelines needed to achieve a bioreceptive urban facade. The resulting facade design will reveal insights and discover the limitations of such an application into urban environments.Architecture, Urbanism and Building Sciences | Building Technolog
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