Wattle and daub experimental workshop: durability testing after 14 years of uninterrupted use

An important factor to analyze when studying the useful lifetime of earth constructions is the detection of any constructive pathologies that may occur; an important consideration when building a house; yet in Argentina information on building with wattle and daub is scarce. This paper describes a durability test conducted on an experimental workshop built with wattle and daub technology in 2004, in the city of Mendoza, Argentina. The building has a floor area of 33.63 m2 (5.70 m x 5.90 m), and houses an experimental workshop for thermal energy research and the construction of solar equipment. During the 14 years that the workshop has been in use, the wattle and daub walls have been exposed to various environmental forces, such as rain, wind, and earthquakes. However, its thermal behavior has remained constant over time, maintaining a difference in temperature of 5.8ºC between the inside and outside without auxiliary heating. In general, the construction has been well-preserved and serves the purpose for which it was built, thus proving that wattle and daub constructions will remain in optimum condition for at least 14 years with minimal maintenance required to prevent surface materials from deteriorating.Fil: Cuitiño Rosales, Maria Guadalupe. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza; Argentina. Universidad Nacional de Cuyo. Facultad de Ciencias Aplicadas a la Industria; ArgentinaFil: Esteves Miramont, Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ambiente, Hábitat y Energía; Argentin

Synchronous parallel kinetic Monte Carlo simulation of AL3SC precipitation

The main objective of the present work is to profound the applicability of a synchronous parallel kinetic Monte Carlo (spkMC) algorithm for simulating the nucleation of Al3Sc precipitates. Parallel processes communication is implemented through Message Passing Interface (MPI). Consequently, the capability of extending time and length scales of atomistic kinetic Monte Carlo (kMC) will be attested. Lastly, we present the results obtained from simulations of nucleation of Al3Sc precipitates, which include a comparative view between sequential and parallel algorithms

Positioning And Design Recommendations For Materials Of Efficient Thermal Storage Mass In Passive Buildings

The role of mass in energy storage has long been a subject of interest in passive buildings. Thermal mass is used to diminish temperature variations for interior spaces in desert or semi- desert climates. Energy from solar and internal gains during the day in winter is often greater than daytime heating requirements. This energy can be stored in materials within the building, and released at night to offset building heat loss. In a similar manner, building mass may allow the interior to remain cooler during the daytime in summer and reduce air conditioning requirements. In this paper, the geometric and energetic positioning of thermal mass has been studied in order to determine most convenient locations. It is found that floors receive direct solar energy for a high percentage of time, usually 70%-90% of the radiation transmitted through the window during the day (9 am to 3 pm solar time). The materials related to the technical efficiency of thermal mass are reviewed specifying the thickness most suitable for storing solar heat in the winter or keeping the interior cool in summer.Fil: Esteves, Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ambiente, Habitat y Energia.; ArgentinaFil: Mercado, Ma. Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ambiente, Habitat y Energia.; ArgentinaFil: Ganem, Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ambiente, Habitat y Energia.; Argentina. Universidad Nacional de Cuyo. Facultad de Artes y Diseño; ArgentinaFil: Gelardi, Daniel. Universidad de Mendoza. Instituto Para El Estudio del Medio Ambiente; Argentin

Simulation of the nucleation of the precipitate Al3Sc in an aluminum scandium alloy using the kinetic monte carlo method

This paper describes the simulation of the phenomenon of nucleation of the precipitate Al3Sc in an Aluminum Scandium alloy using the kinetic Monte Carlo (kMC) method and the density-based clustering with noise (DBSCAN) method to filter the simulation data. To conduct this task, kMC and DBSCAN algorithms were implemented in C language. The study covers a range of temperatures, concentrations, and dimensions, going from 573K to 873K, 0.25% to 5%, and 50x50x50 to 100x100x100. The Al3Sc precipitation was successfully simulated at the atomistic scale. DBSCAN revealed to be a valorous aid to identify the precipitates. The achieved results are in good agreement with those reported in the literature, but we went deeper in the evaluation of the influence of all the simulation and analysis parameters

Parallelization of kinetic Monte Carlo algorithm to simulate AL3Sc precipitation

The present paper reports the precipitation process of Al3Sc structures in an aluminum scandium alloy, which has been simulated with a synchronous parallel kinetic Monte Carlo (spkMC) algorithm. The spkMC implementation is based on the vacancy diffusion mechanism. To filter the raw data generated by the spkMC simulations, the density-based clustering with noise (DBSCAN) method has been employed. spkMC and DBSCAN algorithms were implemented in the C language and using MPI library. The simulations were conducted in the SeARCH cluster located at the University of Minho. The Al3Sc precipitation was successfully simulated at the atomistic scale with the spkMC. DBSCAN proved to be a valuable aid to identify the precipitates by performing a cluster analysis of the simulation results. The achieved simulations results are in good agreement with those reported in the literature under sequential kinetic Monte Carlo simulations (kMC). The parallel implementation of kMC has provided a 4x speedup over the sequential version

Simulation of precipitation in an aluminum scandium alloy using kinetic Monte Carlo and DBSCAN algorithms

The present paper reports the precipitation process of Al3Sc structures in an aluminum scandium alloy, which has been simulated with a kinetic Monte Carlo (kMC) method. The kMC implementation is based on the vacancy diffusion mechanism. To filter the raw data generated by the kMC simulation, the density-based clustering with noise (DBSCAN) method was employed. kMC and DBSCAN algorithms were implemented in the C language. The undertaken simulations were conducted in the SeARCH cluster at the University of Minho. The study covers temperatures, concentrations, and dimensions, ranging from 578K to 873K, 0.25% to 5%, and 50x50x50 to 100x100x100. The Al3Sc precipitation was successfully simulated at the atomistic scale. DBSCAN revealed to be a valorous aid to identify the precipitates. The achieved results are in good agreement with those reported in the literature, but we went deeper in the evaluation of the influence of all the simulation and analysis parameters. A parallel version of the kMC algorithm using OpenMP was evaluated, which has not proved advantageous compared to the optimized sequential implementation

Conservación de energía en sistemas autoconstruidos: El caso de la quincha mejorada

Se presentan la tecnología para autoconstrucción basada en la aplicación de la tecnología de tierra llamada quincha, la que se ha propuesto una mejora para hacerla más conservativa desde el punto de vista de la energía y que a su vez, permite no ser apta para el alojamiento de insectos. La misma se ha aplicado en dos construcciones: ampliación del comedor infantil "Mi Casita Noelia", ubicada en Junín, Mendoza y ampliación del Taller de experimentación del LAHVINCIHUSA. Se presenta el diseño del muro, los resultados de la evaluación térmica del material y esquemas explicativos del armado de esta tecnología.It is presented technology for selfconstruction of houses. It is based in the quincha, old earth technology but this paper show a method for improve thermal characteristic of vertical facades and for the roof. This technology was applicated in dining room for children "Mi Casita Noelia", situated in Junin, Mendoza and Experimental room for tools of LAHV-INCIHUSA. It is presented design of the facades and the result of thermal evaluation of material and explicative draw for technology conformation.Fil: Fernandez, Jose Esteban. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ciencias Humanas, Sociales y Ambientales; ArgentinaFil: Esteves Miramont, Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto de Ciencias Humanas, Sociales y Ambientales; Argentin

Ensayo de potencia para medir el comportamiento térmico de hornos solares. Su validez en función de la época del año

En este trabajo se presenta el estudio de la validez del ensayo de potencia de cocinas solares propuesto en el protocolo de ensayos de la Red Iberoamericana de Cocción Solar de Alimentos (RICSA), al realizarlo en condiciones climáticas distintas. El protocolo indica las pruebas necesarias para evaluar las características de manejo (ergonómicos) seguridad, mantenimiento y materiales, como así también, los ensayos necesarios para determinar su rendimiento térmico. Los cuatro hornos se midieron simultáneamente en verano e invierno. Se puede indicar que el ensayo de potencia, a pesar de variar las condiciones exteriores, son consistentes para ser utilizados en la determinación de las posibilidades de las cocinas solares. Sobretodo si se realiza para comparar distintos tipos de hornos. El horno Ñacuñan1, es el que resulta con mayor potencia de los cuatro tanto en invierno como en verano: 70.2 W y 62.8W respectivamente. Le sigue el horno Nandwani, con 68.5W y 59.9W ; el horno Inclinado con 59.0W y 55.5W y finalmente el horno Ñacuñan2 con 42.3W y 36.2W respectivamente.The comparison of four solar oven throught Power Test it is presented in this paper, applying the Solar Cooker Test Procedure of RICSA (Solar Cooker of Food Latinamerican Netword). This Test Procedure, include thermal test for obtain it thermal performance as well as testing for safety, ergonomical, quality and maintenance aspects. Four oven has been tested simultaneously in summer and winter. The result indicate that Power test is consistent when we make it in summer (with high ambient temperature, solar altitude and solar radiation level) and winter (with low temperatures, solar altitude and solar radiation levels) in Mendoza City (Latitude: 32° 89´S). In summer, power is lower than in winter for the same solar cooker but slope of regression line is lower and when high water and ambient air temperature diferences occur, power is near the same than in winter. However, it is necessary to prove it more in other geographical and climatic situations. Ñacuñan1 oven have 70.2 W and 62.8W in winter and summer respectively. Nandwani oven have 68.5W in winter and 59.9W in summer; Inclinado oven have 59.0W y 55.5W and finaly Ñacuñan2 oven have 42.3W and 36.2W respectively.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

Ensayo de potencia para medir el comportamiento térmico de hornos solares. Su validez en función de la época del año

En este trabajo se presenta el estudio de la validez del ensayo de potencia de cocinas solares propuesto en el protocolo de ensayos de la Red Iberoamericana de Cocción Solar de Alimentos (RICSA), al realizarlo en condiciones climáticas distintas. El protocolo indica las pruebas necesarias para evaluar las características de manejo (ergonómicos) seguridad, mantenimiento y materiales, como así también, los ensayos necesarios para determinar su rendimiento térmico. Los cuatro hornos se midieron simultáneamente en verano e invierno. Se puede indicar que el ensayo de potencia, a pesar de variar las condiciones exteriores, son consistentes para ser utilizados en la determinación de las posibilidades de las cocinas solares. Sobretodo si se realiza para comparar distintos tipos de hornos. El horno Ñacuñan1, es el que resulta con mayor potencia de los cuatro tanto en invierno como en verano: 70.2 W y 62.8W respectivamente. Le sigue el horno Nandwani, con 68.5W y 59.9W ; el horno Inclinado con 59.0W y 55.5W y finalmente el horno Ñacuñan2 con 42.3W y 36.2W respectivamente.The comparison of four solar oven throught Power Test it is presented in this paper, applying the Solar Cooker Test Procedure of RICSA (Solar Cooker of Food Latinamerican Netword). This Test Procedure, include thermal test for obtain it thermal performance as well as testing for safety, ergonomical, quality and maintenance aspects. Four oven has been tested simultaneously in summer and winter. The result indicate that Power test is consistent when we make it in summer (with high ambient temperature, solar altitude and solar radiation level) and winter (with low temperatures, solar altitude and solar radiation levels) in Mendoza City (Latitude: 32° 89´S). In summer, power is lower than in winter for the same solar cooker but slope of regression line is lower and when high water and ambient air temperature diferences occur, power is near the same than in winter. However, it is necessary to prove it more in other geographical and climatic situations. Ñacuñan1 oven have 70.2 W and 62.8W in winter and summer respectively. Nandwani oven have 68.5W in winter and 59.9W in summer; Inclinado oven have 59.0W y 55.5W and finaly Ñacuñan2 oven have 42.3W and 36.2W respectively.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES