THERMAL SCIENCE

International Scientific Journal

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Marija G. Stamenković

,

Goran Vučković

ENERGY CONSUMPTION FOR SPACE COOLING AND HEATING DEPENDING ON FLAT ROOF STRUCTURES RENOVATION. CASE STUDY OF THE HEALTHCARE CENTER NIš

ABSTRACT
Since the reduction of energy consumption and efficient energy use, particularly in the building stock, is the priority for contemporary societies, the ways of how to improve the existing buildings should be examined. Flat roofs, as a part of the existing building thermal envelope, are recognized as a field of intervention for improving efficient energy use for space cooling and heating. The topic of the paper is to determine to what extent different improved roof structures affect energy consumption intended to achieve thermal comfort. Comparative analysis of four roof structures was conducted for the building of Healthcare center Niš in Serbia, one improved non-walkable flat roof structure and three green roof systems. Urbancsape extensive green roof system was used in all tested green roof models: non-walkable extensive green roof, walkable extensive green roof, and extensive and intensive green roof systems within walkable terraces. DesignBuilder software was used for energy modeling. The obtained results indicate a slight decrease in energy consumption for building models with green roofs compared to the building model with the improved non-walkable roof structure, along the cooling period, by approximately 1,5%, which is correlated with previous studies in similar conditions. On the other hand, the reduction of energy consumption over the heating period was negligible (less than 1%). Considering the results and predominant usage of commercial Urbanscape extensive green roof system in all green roof models, being characterized by small thickness (10.64 cm) and light structure, and which is predicted to be installed over the already well-insulated roof, the system’s role as an additional thermal mass was confirmed.
KEYWORDS
energy consumption, existing buildings, flat roofs, renovation, improved roof structure, green roof systems, comparative analysis
PAPER SUBMITTED: 2022-09-10
PAPER REVISED: 2022-11-11
PAPER ACCEPTED: 2022-11-20
PUBLISHED ONLINE: 2022-12-17
DOI REFERENCE: https://doi.org/10.2298/TSCI220910190S
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2023, VOLUME 27, ISSUE Issue 3, PAGES [2465 - 2476]
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Energy consumption for space cooling and heating depending on flat roof structures renovation. Case study of the Healthcare center Niš

© 2024 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, National Institute of the Republic of Serbia, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence