Building envelope influence on the annual energy performance in office buildings

Harmati, L Norbert; Folic, J Radomir; Magyar, Zoltán; Dražić, Jasmina; Kurtović-Folić, Nadja

doi:10.2298/tsci141111109h

Cited by 23 publications

(19 citation statements)

References 13 publications

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“…Unlike conventional material for façade materialization, vegetation walls do not absorb the received solar radiation. Since the value of the coefficient of heat transfer of the façade wall with the added vegetation wall has been reduced, it can be concluded that the experimental measurements yielded the expected results [12,13]. The selection of the system of greening plays a key role in the optimization process, because it allows its performance to increase or decrease the percentage contribution of the selected module in the process of optimizing the façade coating [14].…”

Section: Discussionmentioning

confidence: 99%

Experimental study on reducing temperature using modular system for vegetation walls made of perlite concrete

2018

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Original scientific paper https://doi.org/10.2298/TSCI170612227SThe aim of this research is to examine and analyse the thermal characteristics of the façade modular element. The possibility of optimization of the façade coating with vegetation is examined experimentally in this research, with the aim of improving the thermal characteristics of the façade wall. This element is made of perlite concrete in which the greenery is implanted. The scope of the research is experimental and theoretical testing the possibility for optimizing the façade coating with vegetation. The energy specificities of modular vegetation elements and their contribution to the improvement of the thermal properties of the façade wall are analysed in the experimental part of the research, the elements of vegetation are treated as the elements which influence the decrease in surface temperature of the façade coating. The modular elements in this research are placed on a reference wall surface facing the South. The methodology presented in this paper is based on the study of climate characteristics in city of Belgrade, experimental measurements of test models, and comparative analysis with the reference wall. During the experiment, the data on the external climate parameters and the coefficient of heat transfer through the wall were continuously measured. Conducted measurements and analyses show the vegetation influence on the reduction in surface temperature of the outer wall and the heat passage through the façade coating. The experiment used a modular model and several plant species. It is noticeable that vegetative walls with green areas covered by plant shells play an important role in the harmonization of the parameters of the microclimate in relation to the local environment.

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Section: Discussionmentioning

confidence: 99%

Experimental study on reducing temperature using modular system for vegetation walls made of perlite concrete

2018

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“…To stabilize the frame, 1 mm thick aluminum profiles were included along the contour. The glazing materials were not relevant for the thermal simulation because most of the energy transmitted through windows was assumed to occur by radiation [23]. Reference model without the PCM layer, was compared with other three PCM formulations (EC-PCM40, EC-PCM40-BN10, and EC-PCM40-CNF2) included in the external walls and roof construction.…”

Section: Dwelling Modelmentioning

confidence: 99%

“…Several studies have demonstrated that the envelope of a building influences thermal demand significantly. The envelope construction has great impact in heating and cooling demands and its optimization provides considerable benefits in terms of energy savings and increases energy efficiency of a building [21][22][23][24]. The envelope implementation of materials with high heat capacity is an effective way to generate energy efficient buildings [25].…”

Section: Introductionmentioning

confidence: 99%

Modeling of Energy Demand and Savings Associated with the Use of Epoxy-Phase Change Material Formulations

Arce¹,

Agrawal

Cuña³

et al. 2020

Materials

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This manuscript integrates the experimental findings of recently developed epoxy-phase change material (PCM) formulations with modeling efforts aimed to determine the energy demands and savings derived from their use. The basic PCM system employed was composed of an epoxy resin, a thickening agent, and nonadecane, where the latter was the hydrocarbon undergoing the phase transformation. Carbon nanofibers (CNF) and boron nitride (BN) particulates were used as heat flow enhancers. The thermal conductivities, densities, and latent heat determined in laboratory settings were introduced in a model that calculated, using EnergyPlus software, the energy demands, savings and temperature profiles of the interior and the walls of a shelter for six different locations on Earth. A shipping container was utilized as exemplary dwelling. Results indicated that all the epoxy-PCM formulations had a positive impact on the total energy savings (between 16% and 23%) for the locations selected. The use of CNF and BN showed an increase in performance when compared with the formulation with no thermal filler additives. The formulations selected showed great potential to reduce the energy demands, increase savings, and result in more adequate temperatures for living and storage spaces applications.

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“…The transfer function method of calculation was done in two steps: calculating heat gains through the elements of the covering, through walls, roof, wherein dominates the heat passage. Heat transfer originates from outer air heated to a relatively high temperature and solar radiation, whose influences are joined in the air temperature [13]. Heat transfer [14] is done by convecting the air inside the room, either directly from the inner surfaces, or indirectly, when the matter of heat transfer by radiation and the effects of accumulation are concerned.…”

Section: Applied Simulation On a Residential Buildingmentioning

confidence: 99%

Thermal extras of vegetation walls in Belgrade climatic conditions

2018

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Original scientific paper https://doi.org/10.2298/TSCI170919027SThe goal of this research is to analyse the possibility of using vegetation walls in order to improve the thermal characteristics of office buildings in Belgrade's climatic conditions. The study analyses the possibility of integrating vegetation modules into the façades of office buildings. The paper shows the potential of vegetation technologies in the realisation of façade coverings of architectural buildings with a goal to reduce heat gained during summer time. The use of vegetation walls in architecture has opened up new planning possibilities and created planning conditions for reducing the energy necessary for cooling office buildings. Considering that interaction between the outer environment and inner solving the dependency between comfort, outer look and building's energy balance. This paper is presenting the possibility of using sustainable technologies for solving the problem of overheating in Belgrade's climatic conditions. The research considers the possibilities of using vertically greening systems in planning façade coverings, with an analysis of their thermal characteristics for climatic conditions in Belgrade.

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Building envelope influence on the annual energy performance in office buildings

Cited by 23 publications

References 13 publications

Experimental study on reducing temperature using modular system for vegetation walls made of perlite concrete

Experimental study on reducing temperature using modular system for vegetation walls made of perlite concrete

Modeling of Energy Demand and Savings Associated with the Use of Epoxy-Phase Change Material Formulations

Thermal extras of vegetation walls in Belgrade climatic conditions

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