Iskanje po katalogu digitalne knjižnice

Opis: The primary objective of this paper is to present a dynamic photovoltaic/thermal collector model in combination with a thermal energy storage tank. The added value of the proposed model is the use and integration of existing dynamic models for describing the entire photovoltaic/thermal system. The presented model was validated using measurements on the experimental system located at the Institute of Energy Technology, Faculty of Energy Technology, University of Maribor. The validation was carried out based on three different weather conditions—sunny, cloudy, and overcast. The validation results were evaluated using the normalized root mean square error and mean absolute percentage error for the temperature and output power of the photovoltaic/thermal collector and the temperature of the thermal energy storage tank. The model results concurred with the measurements, as the average mean absolute percentage error values for the temperature and output power of the photovoltaic/thermal collector and thermal energy storage tank temperature were 5.82%, 1.51%, and 7.58% respectively.
Ključne besede: photovoltaic/thermal collector, thermal energy storage tank, dynamic modeling, temperature distribution, output power
Objavljeno v DKUM: 13.11.2023; Ogledov: 318; Prenosov: 14
Celotno besedilo (8,22 MB)
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Ključne besede: energy renovation, thermal bridge, thermal envelope, heating, ventilation
Objavljeno v DKUM: 27.10.2023; Ogledov: 340; Prenosov: 4
Celotno besedilo (14,78 MB)
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Opis: Energy wells are thermo-active elements for an economical extraction or storage of ground energy, similar to energy piles and other deep foundation elements also used as heat exchangers. Heating and/or cooling of buildings requires a primary and secondary thermo-active circuit, commonly connected by a heat pump. The paper gives several design aspects of energy wells which can be also used for the design of deep energy foundations. Thermal response tests have proved suitable for the in-situ determination of thermal ground properties required for an optimised design. Moreover, different systems of energy wells are discussed, and a comprehensive pilot research project is described.
Ključne besede: energy wells, energy foundations, geothermal geotechnics, geothermal heating/cooling, thermo-active structures, thermal ground properties, field testing
Objavljeno v DKUM: 17.05.2018; Ogledov: 1086; Prenosov: 127
Celotno besedilo (4,24 MB)
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Opis: The thesis tends to present a comprehensive approach for sustainable refurbishment of primary schools, treating Martin Konšak Primary School in Maribor as a case study. The first part provides theoretical framework in which understanding of the sustainable refurbishment of schools is formed. Moreover, energy-efficient and sustainable principles of design are introduced. The following part deals with detailed analysis of the existing school. The investigation extends from site analysis - climate conditions, orientation, and urban context - to school building analysis, which includes an overview of the history and the current situation of the school, architectural evaluation, and energy analysis, resulting in summarizing the advantages and disadvantages of the existing building. The final part synthesizes the knowledge and proposes a final design solution for sustainable refurbishment of the school. The refurbishment concept involves renovation or demolition of particular elements and extension of the building's volume. Furthermore, it covers energy-efficient design principles and passive and active strategies to reduce energy consumption of the building and improve its environmental performance. The thesis concludes with simulations of building's energy use before and after the refurbishment.
Ključne besede: sustainable refurbishment, sustainable school, school refurbishment, architecture, energy efficiency, thermal envelope, energy performance.
Objavljeno v DKUM: 23.09.2016; Ogledov: 2332; Prenosov: 298
Celotno besedilo (136,70 MB)