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  • Author or Editor: István Kistelegdi x
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In general, people do not connect a concert and conference center with a structure that incorporates ecological energy use and material saving construction methods [1]. A sustainable energy-conscious building has been developed, through a new and unique interpretation of functions and space, organically integrating the individual buildings into the energy concept and by utilizing the laws of the local environmental energy as well as specific laws of physics and acoustics.

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The Szentágothai János Research Center in Pécs brings computer based building physics simulations to reality closer than ever. This high class building ads ground to several medical research programs and lectures, but it also gives a rare opportunity to improve computer simulations with its’ Building Management System (BMS from now on). The system does not only allow the complex building services system to be remotely controlled from a single computer, but also gathers important data related to the buildings’ physical performance, for example: room temperatures; air flow rates; geothermal pipe performance; and energy consumption of heat pumps. By comparing the results of a zone based building physics simulation model of the building, enhancement of the precision of the simulations and optimization of the actual buildings energy consumption can be done, by trying out different maintenance strategies.The first step is to build the computer model to be as precise as possible. In the zone based physical model, energy flows between zones, but the zones themselves often lack precise physical attributes, like energy loss through heat bridges. In this paper we will show how 2D finite element heat transfer simulations improve, zone base whole building simulations.

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The energy demand of the built environment is almost 50% of the total energy demand of a national economy. What solutions can architects offer to reduce environmental and energy problems? One of the most effective methods to develop highly efficient, sustainable building systems is a research program based on energy simulations and monitoring of the building management. The research team, the Author involved in, is on the right way to lay down milestones of an accurate design method to be able to predict and minimize the total energy needs of the building as early as the design phase. Pre- and post-processing energetic and climatic simulations are made during the whole design process. Based on the simulation results continuous alteration can be developed on the planned building complex. The main purpose of this paper is to demonstrate the dynamic simulation and measurement concept of the program in an actual demonstration building of the University of Pécs, which is one of Hungary’s first energy efficient industrial and office buildings with energy-plus potential.

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The energy and climate concept of the flagship research institute of the University of Pécs is the result of a three-stage development. The prototypical structures and building services of the first two concepts were developed in line with the financial circumstances and grants and the rationalized third concept became an object for construction research. Through the expansion of the building services and energy supply systems, the building itself has become a ‘measuring apparatus’ for sustainable building construction.

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The research topic contributes to the possibilities of energy performance modernization in ‘Squirell Garden’ Nursery School in Csurgó, Hungary. The building bears a special importance for my family and for me, since my mother works there, and I used to attend it as a child. The aim is to achieve an improvement that fulfills the infrastructural requirements set for modern, 21st century nursery schools, that improves the comfort level of children and teachers in the nursery school, makes the maintenance of the facilities more economical and in conformity with regulations, and enhances the quality of education as well as the visual appearance of the building. The target group of the modernization consists of the nursery-school children, parents, nursery-school teachers and nannies, the local government of Csurgó. The study and the calculations implemented are giving a general idea about modernization possibilities of a vintage, since decades unrefurbished kindergarten building, focusing on comfort and low energy consumption.

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Authors: István Háber, István Kistelegdi, Tamás Bötkös and István Farkas

The most common way to measure solar radiation is the horizontal global irradiation measured by a pyranometer. To use the collected data in photovoltaic energy-yield prediction a mathematical model can be made from average data’s of more years. These global horizontal values to be used on tilted surfaces like a solar module, should be transformed, according to the incident angle of the solar beam. But there is a diffuse component also, which has to be determined, because it should be transformed in different way. This work is a case study, where data modeling and the transformation process will be shown using the data collected for Pecs/Hungary, and transformed for an existing site on Komlo, the RATI Ltd’s zero energy factory and also a LabView program has been made based on these data, to be used in the complete ‘heat transfer based photovoltaic-yield model’.

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Due to negative environmental changes and the energy supply problems of the society the EPBD 2010/31/EU prescribes for EU member states to ensure that by 2021 all new buildings are nearly zero energy buildings. The Energydesign® research team of the University of Pécs has developed a research-design method applicable for building climate, energy, aerodynamic and architectural technology modeling of smart energy-plus buildings. This problem-solving matrix arranges the systematic structured planning process, calculations, complex analysis, dynamic energy-climate and computational fluid dynamics simulation control of buildings through a finite number of algorithmic steps. The description of the logged design steps is meant to be an instructional process-guide, the Energydesign Roadmap.

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Authors: Bálint Baranyai, Bálint Bachmann and István Kistelegdi

Getting the possibility to participate in an actual design process of a Hungarian national sports center is a unique chance to demonstrate and investigate the potential of the dynamic simulation supported building design research program. The research is based on synchronous energy simulations and architectural planning. Energetic and climatic simulations are made during the whole design process. All possible simulated building climate- and energy parameters of the planned versions are compared to each other. In this way it is possible continuously develop the energy and climate characteristic of the designed building. The goal is to reach an accurate design method to be able to predict and minimize the total energy needs of the building as early as the design stage. In the first phase of this process the simulation models of the plan variations are compared, which helps to locate the possible weaknesses of the proposed building geometry and structures or its setting method to develop he building structures and proposed building services systems. In the second phase the chosen building plan is optimized and quantified by final simulations.

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Abstract:

During sketch design stage for the new block of the University of Pécs, Medical School comfort and lighting simulations were applied to quantify optimization strategies. Simulation cases about shading possibilities, façade glazing ratios and internal heat storage masses evaluate the impact of illumination, solar gains, loads and heat transmission on visual and thermal comfort. The goal was to select the most favorable comfort, coupled with maximum reduction of investment costs. Concepts represent 14% (shading), 10% (reduced wall-window ratio), 11% (slabs without suspended ceilings), and 17% (combined wall-window ratio and thermal mass) improvement in thermal comfort performance, and it was proposed for further design.

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Abstract:

A building physics supported development was undertaken for the new block of the University of Pécs, Medical School. During sketch design stage climate, lighting and energy simulations were applied to quantify energy optimization strategies. Simulation cases assess the impact of shading technologies, wall-window ratios and thermal masses on used thermal energy demand. Based on a previous study about visual and comfort performance, goal was to identify the highest energy efficiency rates with maximum investment cost savings. Besides best comfort results, the most optimal development represents 9% saving in used thermal energy, and they were proposed for further design.

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