The Experts below are selected from a list of 140601 Experts worldwide ranked by ideXlab platform
Helmut E Feustel - One of the best experts on this subject based on the ideXlab platform.
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comis an international multizone air flow and contaminant transport model
Energy and Buildings, 1999Co-Authors: Helmut E FeustelAbstract:Abstract A number of interzonal models have been developed to calculate air flows and pollutant transport mechanisms in both single and multizone Buildings. A recent development in multizone air-flow modeling, the COMIS model, has a number of capabilities that go beyond previous models, much as COMIS can be used as either a stand-alone air-flow model with input and output features or as an infiltration module for Thermal Building simulation programs. COMIS was designed during a 12 month workshop at Lawrence Berkeley National Laboratory (LBNL) in 1988–1989. In 1990, the Executive Committee of the International Energy Agency's Energy Conservation in Buildings and Community Systems program created a working group on multizone air-flow modeling, which continued work on COMIS. The group's objectives were to study physical phenomena causing air flow and pollutant (e.g., moisture) transport in multizone Buildings, develop numerical modules to be integrated in the previously designed multizone air flow modeling system, and evaluate the computer code. The working group supported by nine nations, officially finished in late 1997 with the release of IISiBat/COMIS 3.0, which contains the documented simulation program COMIS, the user interface IISiBat, and reports describing the evaluation exercise. This paper serves as an introduction for the other publications included in this Special Issue.
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comis an international multizone air flow and contaminant transport model
Energy and Buildings, 1999Co-Authors: Helmut E FeustelAbstract:Abstract A number of interzonal models have been developed to calculate air flows and pollutant transport mechanisms in both single and multizone Buildings. A recent development in multizone air-flow modeling, the COMIS model, has a number of capabilities that go beyond previous models, much as COMIS can be used as either a stand-alone air-flow model with input and output features or as an infiltration module for Thermal Building simulation programs. COMIS was designed during a 12 month workshop at Lawrence Berkeley National Laboratory (LBNL) in 1988–1989. In 1990, the Executive Committee of the International Energy Agency's Energy Conservation in Buildings and Community Systems program created a working group on multizone air-flow modeling, which continued work on COMIS. The group's objectives were to study physical phenomena causing air flow and pollutant (e.g., moisture) transport in multizone Buildings, develop numerical modules to be integrated in the previously designed multizone air flow modeling system, and evaluate the computer code. The working group supported by nine nations, officially finished in late 1997 with the release of IISiBat/COMIS 3.0, which contains the documented simulation program COMIS, the user interface IISiBat, and reports describing the evaluation exercise. This paper serves as an introduction for the other publications included in this Special Issue.
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comis an international multizone air flow and contaminant transport model
Other Information: PBD: Aug 1998, 1998Co-Authors: Helmut E FeustelAbstract:A number of interzonal models have been developed to calculate air flows and pollutant transport mechanisms in both single and multizone Buildings. A recent development in multizone air-flow modeling, the COMIS model, has a number of capabilities that go beyond previous models, much as COMIS can be used as either a stand-alone air-flow model with input and output features or as an infiltration module for Thermal Building simulation programs. COMIS was designed during a 12 month workshop at Lawrence Berkeley National Laboratory (LBNL) in 1988-89. In 1990, the Executive Committee of the International Energy Agency`s Energy Conservation in Buildings and Community Systems program created a working group on multizone air-flow modeling, which continued work on COMIS. The group`s objectives were to study physical phenomena causing air flow and pollutant (e.g., moisture) transport in multizone Buildings, develop numerical modules to be integrated in the previously designed multizone air flow modeling system, and evaluate the computer code. The working group supported by nine nations, officially finished in late 1997 with the release of IISiBat/COMIS 3.0, which contains the documented simulation program COMIS, the user interface IISiBat, and reports describing the evaluation exercise.
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comis an international multizone air flow and contaminant transport model
Other Information: PBD: Aug 1998, 1998Co-Authors: Helmut E FeustelAbstract:A number of interzonal models have been developed to calculate air flows and pollutant transport mechanisms in both single and multizone Buildings. A recent development in multizone air-flow modeling, the COMIS model, has a number of capabilities that go beyond previous models, much as COMIS can be used as either a stand-alone air-flow model with input and output features or as an infiltration module for Thermal Building simulation programs. COMIS was designed during a 12 month workshop at Lawrence Berkeley National Laboratory (LBNL) in 1988-89. In 1990, the Executive Committee of the International Energy Agency`s Energy Conservation in Buildings and Community Systems program created a working group on multizone air-flow modeling, which continued work on COMIS. The group`s objectives were to study physical phenomena causing air flow and pollutant (e.g., moisture) transport in multizone Buildings, develop numerical modules to be integrated in the previously designed multizone air flow modeling system, and evaluate the computer code. The working group supported by nine nations, officially finished in late 1997 with the release of IISiBat/COMIS 3.0, which contains the documented simulation program COMIS, the user interface IISiBat, and reports describing the evaluation exercise.
Bjørn Petter Jelle - One of the best experts on this subject based on the ideXlab platform.
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traditional state of the art and future Thermal Building insulation materials and solutions properties requirements and possibilities
Energy and Buildings, 2011Co-Authors: Bjørn Petter JelleAbstract:Abstract The advantages and disadvantages of the Thermal Building insulation materials and solutions have been treated. Both traditional, state-of-the-art and possible materials and solutions beyond these have been investigated. Examples of these may be mineral wool, expanded polystyrene, extruded polystyrene, polyurethane, vacuum insulation panels, gas insulation panels, aerogels, and future possibilities like vacuum insulation materials, nano insulation materials and dynamic insulation materials. Various properties, requirements and possibilities have been compared and studied. Among these are Thermal conductivity, perforation vulnerability, Building site adaptability and cuttability, mechanical strength, fire protection, fume emission during fire, robustness, climate ageing durability, resistance towards freezing/thawing cycles, water resistance, costs and environmental impact. Currently, there exist no single insulation material or solution capable of fulfilling all the requirements with respect to the most crucial properties. That is, for the Buildings of today and the near future, several insulation materials and solutions are used and will have to be used depending on the exact circumstances and specifications. As of today, new materials and solutions like e.g. vacuum insulation panels are emerging, but only slowly introduced in the Building sector partly due to their short track record. Therefore it will be of major importance to know the limitations and possibilities of all the insulation materials and solutions, i.e. their advantages and disadvantages. In this respect new conceptual Thermal Building insulation materials are also discussed.
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the path to the high performance Thermal Building insulation materials and solutions of tomorrow
Journal of Building Physics, 2010Co-Authors: Bjørn Petter Jelle, Arild Gustavsen, Ruben BaetensAbstract:© The Author(s) 2010. Reprints and permissions: sagepub.co.uk/journalsPermissions.nav. This is the authors' accepted and refereed manuscript to the article.
Sebastian Herkel - One of the best experts on this subject based on the ideXlab platform.
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aggregation of residential Buildings for Thermal Building simulations on an urban district scale
Sustainable Cities and Society, 2018Co-Authors: Mehmet Elci, Benjamin Manrique Delgado, Hansmartin Henning, Gregor P Henze, Sebastian HerkelAbstract:Abstract Knowing the energy demand at the scale of neighborhoods allows the conception of efficient energy administration systems that aid to reach sustainability in the built environment. When energy demand data is not available, simulation models can provide estimations and thus enable the analysis of a neighborhood. To simulate the space heating demand of a residential Building stock, often an aggregation is carried out. Aggregation implies using one or a few representative models to replace a larger number of Building models. This paper explores the effect of the aggregation method on model accuracy when applying a first-order Building model for the space heating demand of an urban residential district. The results show that aggregation leads to inaccuracies when the district includes Buildings with varying values for their properties: the errors reach 14% if the district is highly polarized and 8% for more diverse districts. Aggregating Buildings with identical properties diminishes the error compared to a total aggregation − aggregating the Building stock as a whole. Aggregation with respect to certain Building properties yields better results than others, with window area fraction and U-value of opaque surfaces leading to the first and second lowest error values.
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load shifting using the heating and cooling system of an office Building quantitative potential evaluation for different flexibility and storage options
Applied Energy, 2017Co-Authors: Konstantin Klein, Hansmartin Henning, Sebastian Herkel, Clemens FelsmannAbstract:Abstract This numerical study evaluates and compares four different flexibility and storage options in Building energy systems (batteries, fuel switch, water tanks, and Thermal Building mass) in terms of potential improvements in load scheduling and energy efficiency. Using a generic modern office Building with concrete core conditioning as an example, two different supply concepts (one based on a heat pump, one based on a CHP unit) are considered. A novel hybrid control concept is applied which is designed to be compatible with state-of-the-art controllers implemented in the field. The results show that batteries are the most technically attractive options in terms of grid support, efficiency and ease of implementation. Fuel switch is comparably straightforward to implement, but provides significant benefits only for the considered CHP system. Water tanks with a capacity of about two full operation hours offer nearly the same flexibility as much larger tanks, but negatively influence the efficiency of heat pump systems. The Thermal Building mass can be used effectively and efficiently for Thermal storage, particularly in the heating season, but this is technically challenging to realize. It is shown that current electricity prices do not offer sufficient variations to stimulate grid-supportive operation.
Giuliano Raimondi Gabriela - One of the best experts on this subject based on the ideXlab platform.
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Bio-climatic design strategies aplicattion and thermical simulation in a rural house in Colalao del Valle-Tucumán like supports for its improvement
2020Co-Authors: Garzón Beatriz, Giuliano Raimondi GabrielaAbstract:Sus objetivos son mostrar: a) evaluación térmica de un caso de hábitat doméstico rural tucumano y b) soluciones alternativas para su mejoramiento y adecuación bioclimatica. Las etapas realizadas son: 1) Identificación y caracterización del área de trabajo; 2) Relevamiento arquitectónico de viviendas rurales espontáneas; 3) Identificación de las variables: ambientales, funcionales, tecnológicas, morfológicas, energéticas que las definen; 4) Simulación térmica computacional mediante SIMEDIF; 5) Propuestas. En cuanto a los resultados, aunque las temperaturas interiores medias oscilan en los 14,5ºC y las bajas amplitudes térmicas entre 16,5ºC y 12,5ºC, son inferiores a la temperatura interior de confort para inverno (20ºC). Por ello, sería necesario: a) usar sistemas de calefacción no convencionales, b) aplicar otras pautas de diseño bioclimático a nivel emplazamiento y de ganancia solar directa y c) proponer nuevas resoluciones tecnológicas para los cerramientos. Este Trabajo permitirá formular pautas y estrategias orientadoras para una adecuada producción habitacional para dicho contexto.The objectives are show: a) the Thermal evaluation of a domestic rural habitat of Tucumán and b) the alternatives solutions for its reforms and adequateness bioclimatic. The activities developed are: 1) Identification and characterization of the work area; 2) Identification of architectural resources using in rural houses; 3) Identification of the environmental, functional, technologic, morphologic and energetic variables which define the typical house; 4) Thermal Building simulation with SIMEDIF; 5) Proposals. As far as the results, although the average inner temperatures oscillate in 14,5ºC and the low Thermal amplitude between 16,5ºC and 12,5ºC, are inferior to the inner temperature of comfort for winter (20ºC). So, it would be necessary: a) to use non conventional systems for heating, b) to apply to other guidelines of bioclimatic design at level location and direct solar gain and c) to propose new technological resolutions for the walls and roof. This paper will permit formulate patterns and strategies to orientate the rural production housing for this climatic zone.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES
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Evaluation of the bio-climatic design strategies aplicattion in a rural house in Balderrama ‒Tucumán‒ and proposals for its improvement by thermical simulation
2020Co-Authors: Garzón Beatriz, Giuliano Raimondi GabrielaAbstract:Los objetivos del presente trabajo es mostrar la evaluación térmica de un caso del hábitat doméstico rural de la provincia de Tucumán y las propuestas para su mejoramiento. En él se describe la aplicación de estrategias bioclimáticas y su simulación térmica computacional mediante SIMEDIF. Las etapas realizadas son: 1) Identificación y caracterización del área de trabajo; 2) Relevamiento de disposiciones y envolventes arquitectónicas utilizadas en la producción de las Viviendas Rurales Espontáneas; 3) Identificación de variables: ambientales -natural y cultural-, funcionales, tecnológicas, morfológicas, energéticas, que definen la adecuación bioclimática de dichas viviendas; 4) Simulación térmica; 5) Propuestas. En cuanto a los resultados, los valores de temperaturas obtenidas en la simulación son superiores al de temperatura interior de confort (25 ºC) para verano pues a pesar de haber aplicado los usuarios-constructores las estrategias de diseño bioclimático a nivel emplazamiento, configuración morfológica y funcional, no las aplicaron a nivel resolución tecnológica por lo que se proponen alternativas para ello. En relación a sus alcances, esta investigación permitirá formular pautas y estrategias orientadoras para una adecuada producción habitacional para dicho contexto.The objective of this paper is show the Thermal evaluation of a domestic rural habitat of Tucuman Province and the proposals for its reformt. It describes the bioclimatic strategies application and the Thermal behavior by simulation with SIMEDIF. The activities devoloped are: 1) Identification and characterization of the work area; 2) Identification of architectural and technologic resources using in the rural housing production; 3) Identification of the environmental, functional, technologic, morphologic and energetic variables which define the bioclimatic adequateness of a tipical house; 4) Thermal Building simulation; 5) Proposals. The results are: the temperature values obtained by the simulation are higger than the interior confort temperature (25ºC) by summer because the user-constructor applicated the bioclimatic design strategies for morphologic and funtional configuration but they did not do it for thechnologic resolution, then alternatives solutions for its improvement are developed. This research will permit formulate paterns and strategies to orientate the rural production housing for this climatic zone.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES
Hansmartin Henning - One of the best experts on this subject based on the ideXlab platform.
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aggregation of residential Buildings for Thermal Building simulations on an urban district scale
Sustainable Cities and Society, 2018Co-Authors: Mehmet Elci, Benjamin Manrique Delgado, Hansmartin Henning, Gregor P Henze, Sebastian HerkelAbstract:Abstract Knowing the energy demand at the scale of neighborhoods allows the conception of efficient energy administration systems that aid to reach sustainability in the built environment. When energy demand data is not available, simulation models can provide estimations and thus enable the analysis of a neighborhood. To simulate the space heating demand of a residential Building stock, often an aggregation is carried out. Aggregation implies using one or a few representative models to replace a larger number of Building models. This paper explores the effect of the aggregation method on model accuracy when applying a first-order Building model for the space heating demand of an urban residential district. The results show that aggregation leads to inaccuracies when the district includes Buildings with varying values for their properties: the errors reach 14% if the district is highly polarized and 8% for more diverse districts. Aggregating Buildings with identical properties diminishes the error compared to a total aggregation − aggregating the Building stock as a whole. Aggregation with respect to certain Building properties yields better results than others, with window area fraction and U-value of opaque surfaces leading to the first and second lowest error values.
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load shifting using the heating and cooling system of an office Building quantitative potential evaluation for different flexibility and storage options
Applied Energy, 2017Co-Authors: Konstantin Klein, Hansmartin Henning, Sebastian Herkel, Clemens FelsmannAbstract:Abstract This numerical study evaluates and compares four different flexibility and storage options in Building energy systems (batteries, fuel switch, water tanks, and Thermal Building mass) in terms of potential improvements in load scheduling and energy efficiency. Using a generic modern office Building with concrete core conditioning as an example, two different supply concepts (one based on a heat pump, one based on a CHP unit) are considered. A novel hybrid control concept is applied which is designed to be compatible with state-of-the-art controllers implemented in the field. The results show that batteries are the most technically attractive options in terms of grid support, efficiency and ease of implementation. Fuel switch is comparably straightforward to implement, but provides significant benefits only for the considered CHP system. Water tanks with a capacity of about two full operation hours offer nearly the same flexibility as much larger tanks, but negatively influence the efficiency of heat pump systems. The Thermal Building mass can be used effectively and efficiently for Thermal storage, particularly in the heating season, but this is technically challenging to realize. It is shown that current electricity prices do not offer sufficient variations to stimulate grid-supportive operation.
