Browsing by Author "Verichev, Konstantin"

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    A review of the alumina production from coal fly ash, with a focus in Russia
    (2022) Valeev, Dmitry ; Bobylev, Petr; Osokin, Nikita ; Zolotova, Irina; Rodionov, Ilia ; Salazar-Concha, Cristian ; Verichev, Konstantin
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    Accuracy Assessment of The Urban Land Surface Temperature Calculation Based on Landsat-8/Oli Data (Case Study: Coyhaique, Chile)
    (IEEE, 2019) Verichev, Konstantin; Mikhaylyukova, Polina; Salimova, Alisa; Salazar, Cristian; Carpio Martínez, Manuel
    The relationship between the values of the surface temperature retrieved from the Landsat-8/OLI satellite data and the values of the atmospheric temperature measured by NETAMO sensors in the urban environment of the Coyhaique city (Oct.2017Sep.2018) was analyzed.Based on the five satellite (one winter, one spring and three summer) images, the coefficient of the linear relationship determination between the two types of temperature was 0.85.
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    Adaptation and mitigation to climate change of envelope wall thermal insulation of residential buildings in a temperate oceanic climate
    (Elsevier, 2021) Verichev, Konstantin; Zamorano Toro, Montserrat; Fuentes-Sepúlveda, Armin; Cárdenas, Nadia; Carpio Martínez, Manuel
    In the context of climate change, it is difficult to maintain the energy performance of houses, especially in countries with building codes that regulate the maximum allowed amount of energy that a building can consume. For this reason, there is a need for a review of building standards and adaptation to the context of energy performance in planning future projects. The objective of this research was to ascertain the thermal transmittance of external walls for single-family homes and to establish the energetically optimal thickness of thermal insulation by using an energy simulation to maintain heating energy consumption in conditions of climate change while following the state regulations in the Los Ríos region of Chile. It was demonstrated that for each time period and in each geographical location of the region the optimal U-value of the external walls is different. For a house to have a heating energy consumption corresponding to 90 kWh/m2/year, it must have an optimal average U-value of the walls of 0.49 ± 0.11 W/m2K (year 2006 in the study region); however, for the period 2035–2050, this value is expected to reach 0.78 ± 0.14 W/m2K. In addition, it was shown that designing the house with an energy performance perspective of 15 years helps to reduce the carbon footprint of the use of thermal insulation in the walls by 20%. The results obtained demonstrate the importance of considering the effects of future climate change in the housing design process in terms of both energy and environmental.
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    An Approach Concerning Climate Change and Timber Building Resilience: Araucanía Region, South Chile
    (MDPI, 2021) Prieto Ibáñez, Andrés José; Verichev, Konstantin; Ferreira, Ana da Silva
    This study analysed climate change effects concerning the resilience of timber buildings located in southern Chile, specifically in two cities: Collipulli and Temuco (Araucanía Region). A digital fuzzy logic method was used in a set of timber buildings declared as heritage conservation buildings by Chilean Government standards. The outcomes revealed that climate change impacts did not substantially alter the functional performance of the set of heritage timber buildings examined. This study’s results can assist in developing upcoming strategies or recommendations that can support adaptation policies for administering architectural heritage regarding climate change forecasts. These data will invaluably help stakeholders who support the conservation of timber structures located in the southern environment of Chile and under the changing climatic hazard
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    Analysis of Climate-Oriented Researches in Building
    (2021) Verichev, Konstantin ; Zamorano, Montserrat ; Salazar Concha, Cristian Eduardo ; Carpio, Manuel
    Many factors and aspects of the construction and operation of buildings depend on climatic parameters and climatic zones, so these will be fundamental for adapting and mitigating the effects of climate change. For this reason, the number of climate-oriented publications in building is increasing. This research presents an analysis on the most-cited climate-oriented studies in building in the period 1979-2019. The main themes, the typologies of these investigations and the principal types of climatic zoning used in these studies were analysed through bibliographic and manual analysis. A broad spectrum of themes directly and indirectly related to climate and climatic zones and buildings was demonstrated. It was found that 88% of all climate-oriented investigations, to one degree or another, are within the scope of the general topic of energy conservation. A thorough understanding of all climate-dependent aspects will help in designing dwellings appropriately in different climate zones. In addition, a methodology that facilitates the establishment of a typology of climate-oriented research is presented. This typology can be used in future research in different scientific areas. It was also revealed that the climate zones of the National Building Codes of China, the USA and Turkey prevailed in the studies analysed.
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    Climatic zoning for building construction in a temperate climate of Chile
    (2018) Verichev, Konstantin; Carpio Martínez, Manuel
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    Dataset on solar contributions by thermal solar systems in Chile applying Chilean and Spanish regulations
    (2019) López-Ochoa, Luis M.; Verichev, Konstantin; Las-Heras-Casas, Jesús; Carpio Martínez, Manuel
    The data presented in this article are related to the research article entitled "Solar domestic hot water regulation in the Latin American residential sector with the implementation of the Energy Performance of Buildings Directive: The case of Chile" (Lopez-Ochoa et al., 2019), which evaluates the possibility of adapting Spanish solar domestic hot water regulations in Chile, with the objective of presenting the potential impact of the Energy Performance of Buildings Directive in Latin America. This dataset was made publicly available to show the possible energy savings with the thermal solar systems proposed to enable the use of these data by other researchers as well as designers, installers and decision-makers. (c) 2019 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
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    Dynamics of Built-Up Areas over The Past 30 Years According to Remote Sensing Data in the City of Valdivia, Chile
    (IEEE, 2018) Verichev, Konstantin; Mikhaylyukova, Polina; Salazar, Cristian; Carpio Martínez, Manuel
    The dynamics of built-up areas over the last 30 years in the city of Valdivia was analyzed according to Landsat satellite imagery data. For ETM+/Landsat-7 and OLI/Landsat-8 instrumentation systems, method of automatic satellite image interpretation of build-up areas showed inaccuracy, less than 1%, compared to visual method. For TM/Landsat-5 instrumentation system, method of automatic satellite image interpretation of build-up areas demonstrated unsatisfactory results. Since 1987 and by the year 2017 the city's built-up areas increased by 61% with the population growth of 66% within the same time period.
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    Dynamics of Changes in Climate Zones and Building Energy Demand. A Case Study in Spain
    (2021) Díaz-López, Carmen ; Jódar, Joaquín ; Verichev, Konstantin ; Rodríguez, Miguel Luis ; Carpio, Manuel ; Zamorano, Montserrat
    In the current context of the climate crisis, it is essential to design buildings that can cope with climate dynamics throughout their life cycle. It will ensure the development of sustainable and resilient building stock. Thus, this study's primary objective has been to demonstrate that the current climatic zones for buildings in peninsular Spain do not represent the current climatic reality and are not adapted to climate change and the impact on the energy demand of buildings. For this reason, the climatic zones of 7967 peninsular cities have been updated and adapted to the RCP 4.5 and RCP 8.5 scenarios by using the data measured in 77 meteorological reference stations. The results obtained have shown that in more than 80% of the cities, buildings are designed and constructed according to an obsolete climatic classification that does not take into account the current or future climatic reality, which will significantly affect the thermal performance of a building and highlights the need to review the climatic zoning in the country. The results obtained can be extrapolated to other regions. The methodology defined in this work can be used as a reference, thus making an essential scientific contribution in reflecting on current capacities and the possibilities of improving the building stock.
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    Efficiency assessment for the urban heat island mitigation measures in a city with an oceanic climate during the summer period: Case of Valdivia, Chile
    (2024) Morales-Gonzalez, Jose Ignacio; Verichev, Konstantin; Carpio, Manuel
    Urban heat islands are a phenomenon present around the world, affecting several areas of life. Various studies in Chile have considered this problem, but they are focused on the northern and central zones of the country. This phenomenon has been identified in cities in southern Chile as well; however, there is a lack of research to complement current information about urban heat islands in this region and present mitigation strategies. This study aims to analyse the urban heat island effect in a city in southern Chile during a warm season (southern hemisphere summer) using high-resolution computational fluid dynamic simulations and proposes efficient urban planning strategies to mitigate this effect. Four mitigation strategies were studied: tree cover, reflective pavements, water fountains, and a mixed strategy including all of the previous three. A representative urban area was selected, and through statistical analysis, a strong diurnal urban heat island was identified, principally due to the urban morphology of the case study. All strategies were effective, with the mixed one presenting the best results in this area. Tree cover could decrease the median urban heat islands intensity by 0.6 degrees C, changing the albedo decreased 0.94 degrees C, water fountains decreased 0.4 degrees C, and finally the mixed one could decrease 1.4 degrees C. However, the complexity of implementing these strategies must be taken into consideration. Our results can help urban planners to make better decisions according to available resources.
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    How do urban heat islands affect the thermo-energy performance of buildings?
    (ELSEVIER SCI LTD, 2022) Lopez-Guerrero, Rafael E.; Verichev, Konstantin; Moncada-Morales, Guillermo A.; Carpio, Manuel
    Cities occupy 3% of the surface of the planet, but account for 60-80% of energy consumption and 75% of carbon emissions. Likewise, buildings consume 35% of the energy and emit 38% of global greenhouse gases. Cities can aggravate such problems further by generating the phenomenon of urban heat islands (UHI). Few studies have evaluated the state of the art in UHIs' influence on buildings' energy performance, so the present research aims to analyze the main studies evaluating the thermo-energy behavior of buildings subjected to UHI. This was done with a systematic literature review and a scientific mapping of the publications present in Web of Science until 2021. 100 articles were selected for analysis in this review. The results point to an important evolution in the study of parameters affecting urban buildings' performance, in addition to the analysis of different urban land uses as a strategy to sectorize UHI. Such scientific evolution is analyzed and discussed in four-time segments. Fragmentation on building cooling loads and the energy penalty index derived from UHI are discussed, resulting in an average cooling penalty of 6.63 kWh/m2/y/degrees C and 3.81 kWh/m2/y/degrees C, for residential and office use respectively. This study presents limitations and proposes applications for the use of this index, as well as prospects for future studies and main research gaps in the area.
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    Influence of degree days calculation methods on the optimum thermal insulation thickness in life-cycle cost analysis for building envelopes in Mediterranean and semi-Arid climates
    (2023) Verichev, Konstantin; Serrano-Jiménez, Antonio; Carpio Martínez, Manuel; Barrios-Padura, Ángela; Díaz-López, Carmen
    The life-cycle cost analysis (LCCA) is one of the most widely used and validated methods to identify the optimum insulation thickness of the building envelope. This method depends on two parameters—heating and cooling degree days (HDD, and CDD). There are various methods for HDD and CDD calculation, the results of which vary significantly depending on the climatic zone. Therefore, this study aimed to analyse the optimum expanded polystyrene insulation thicknesses of a typical wall in Andalusia, Spain, obtained by the LCCA method to demonstrate variations and uncertainties of the results of the LCCA method based on HDD and CDD calculated by the “hourly”, UKMO, and ASHRAE methods, and with different base temperatures in the conditions of Mediterranean and Semi-Arid climates. On average, the HDD values calculated by using the ASHRAE method were lower, by 12.5%, than those calculated using UKMO and the “hourly” method. The CDD values calculated using the ASHRAE method were lower, by 29%, than those obtained using UKMO and the “hourly” method. Consequently, the optimum insulation thicknesses determined based on CDD and HDD calculated using the ASHRAE method were, on average, 14% underestimated compared with the thicknesses obtained using the UKMO and “hourly” methods. The results obtained showed that with an increase in the continentality of the climate, it becomes crucial to correctly use one or another method for calculating degree days to determine the optimum insulation of the building envelope using the LCCA method, which, in turn, requires the development of validation methods.
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    Influence of heating degree day calculation methods in designing the thermal envelope of buildings
    (2022) Verichev, Konstantin
    Heating degree day is an essential parameter for estimation of energy demand and consumption in buildings. In the case of hourly temperature data availability, it is more appropriate to use the hourly method to calculate heating degree days. In the situation of reduced meteorological data, other methodologies must be selected for calculation. These methodologies include ASHRAE and UKMO methods. The aim of the present study is to analyse the effect of substitution in the heating degree day calculation method to modify building recommendations of current Chilean thermal building codes, maintaining the transmission heat losses through thermal envelope of buildings, in various geographical locations, with different climatic conditions. Analysing the data obtained from 165 meteorological stations, it has been discovered that there are significant differences in the geographical distribution of heating degree days calculated with ASHRAE and UKMO methods in desert areas, while heating degree days are similar in regions with a more temperate climate with both methods. When there is a significant frequency of days with large daily temperature amplitude, it is more advisable to use the UKMO method for the calculation of heating degree days. For all these reasons, new values of thermal transmittances have been proposed for the opaque elements of the thermal envelopes with the developed methodology. A reduction by up 65% of the values of thermal transmittances are required using UKMO method in desert areas and no variations are required in cold zones. The new values of thermal transmittances proposed will help to improve the energy performance of buildings and to achieve a better adaptation to the climatic conditions.
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    Mapping of built-up area dynamics over the past 30 years in the princial cities of southern Chile based on Landsat Imagery
    (Bulgarian Cartographic Association, 2018) Verichev, Konstantin; Mikhaylyukova, Polina; Salimova, Alisa; Salazar-Concha, Cristian; Carpio Martínez, Manuel
    In this paper, the dynamics of built-up areas over the past 30 years in principal cities (the actual population of more than 100,000 people) in southern Chile is analyzed according to Landsat satellite imagery data. The area of built-up territories increased by 244% in Puerto Montt, and the lowest by 14% in Punta Arenas, and in the same time period, the population in cities grew by 151% and by 28%, respectively. It was revealed, that given differences depend on the geographical, economic and administrative status of cities in the region of our study.
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    Proposal on a new climatic zoning for building in the south of Chile
    (2021) Verichev, Konstantin; Carpio Martínez, Manuel; Zamorano Toro, Montserrat; Pontificia Universidad Católica de Chile. Escuela de Ingeniería
    La zonificación climática para la edificación es una herramienta efectiva de la política de regulación energética. Sin embargo, el cambio climático está provocando que la zonificación actual no se ajuste a la realidad climática existente. Este es el caso del sur de Chile, donde las zonas actuales y los códigos de edificación no pueden garantizar la implementación de edificaciones energéticamente eficientes. Esta tesis ha tenido como objetivo desarrollar una propuesta de zonificación climática para edificación residencial en el sur de Chile, con una metodología reproducible que permita una actualización constante, mitigue y se adapte al cambio climático, reduciendo así los efectos en el medio ambiente en su proceso de climatización. Para ello, en las cinco regiones del país, se ha analizado la adecuación de la aplicación métodos de zonificación: basada en grados-día para calefacción, la bioclimática, la basada en el método de clusterización de los parámetros climatológicos, las dos metodologías del Código Técnico de la Edificación de España y la de la ASHRAE. Como resultado, se identificaron los principales parámetros y características que debe tener una zonificación climática efectiva: (i) tener una metodología reproducible para la actualización constante en contexto de dinamismo climático; (ii) basarse en datos meteorológicos de alta resolución espacial; (iii) tener en cuenta las características climáticas de los períodos de invierno y verano. Considerando lo anterior, se concluye con una propuesta metodológica que ha permitido determinar nuevas zonas climáticas para la edificación, así como proporcionar recomendaciones para el diseño de la envolvente de los edificios, basándose en la metodología del Código Técnico de la Edificación de España y de la ASHRAE. La zonificación climática propuesta permitirá implementar proyectos de viviendas con altos estándares energéticos, desarrollar códigos de construcción dinámicos que permitirán mitigar los efectos del cambio climático y adaptar la edificación a los mismos.
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    The influence of the urban heat island effect on the energy performance of residential buildings in a city with an oceanic climate during the summer period: Case of Valdivia, Chile
    (2023) Verichev, Konstantin; Salazar-Concha, Cristian; Diaz-Lopez, Carmen; Carpio, Manuel
    The intensification of urban growth and climate change are affecting the energy and thermal performance of buildings. In recent years, the issue of building resilience to urban heat island (UHI) conditions has become increasingly relevant. The energy performance of buildings can vary significantly in different areas of the same city, regardless of their size. The aim of this study was to evaluate the energy effects of UHI intensity differences in various local climate zones (LCZs) of Valdivia city, Chile, on a typical residential dwelling. A simplified methodology was used, based on the assessment of cooling degree days variations and heat gains variations inside the studied house through the thermal envelope. Valdivia has a homogeneous urban morphology, and three types of low-rise LCZs prevail in the city (LCZ 3, 6, and 9). The results showed that the average cooling demand for a 66 m2 residential dwelling during 39 summer days was 158 kWh for LCZ 9, 219 kWh for LCZ 6, and 289 kWh for LCZ 3, compared to the rural demand of 114 kWh. These results suggest that the energy effects of UHI can be significant, and that it is important to study the microclimatic conditions in various LCZs for a correct understanding of the UHI energy effects on different buildings.
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    Urban heat islands' effects on the thermo-energy performance of buildings according to their socio-economic factors
    (Elsevier, 2024) López Guerrero, Rafael Eduardo; Verichev, Konstantin; Cárdenas, Juan Pablo; Carpio Martínez, Manuel
    Urban areas experience the urban heat island (UHI) effect, which affects the thermal comfort and energy consumption of buildings. These consequences could vary depending on the socio-economic status of the neighbourhoods. Few studies have investigated how UHI affects socio-economically contrasting districts in thermal comfort and energy performance. Therefore, the primary goal of this research is to evaluate and compare the energy efficiency and thermal comfort conditions of residential buildings in the same city (Temuco, Chile) but located in socio-economically contrasting neighbourhoods. Urban weather files were first modelled in four urban zones using UWG software. Also, EnergyPlus building simulations were conducted to evaluate discomfort hours in adaptive comfort models and energy performance. The results showed annual average UHI intensities between 1.5 and 2.5 K. Urban–rural cooling energy load differences ranged between 12.47% and 38.92%, while heating energy load differences ranged between −20.47% and −81.95%. These distinctions depended on the urban zone, residence model analysed, or energy building standard applied. Similarly, urban-rural differences in thermal comfort times varied from 0.5% to 100%. Results illustrate that the risk of overheating could increase in socio-economically vulnerable areas. This issue could worsen if urban segregation continues to generate poor urban design in low-income districts.