Sustainable approaches for retrofitting buildings for energy efficiency are becoming necessary in a time when the building sector is the largest energy consumer. Retrofitting building stock is effective for reducing global energy consumption and decreasing resource exploitation. Less developed EU member states and neighboring developing countries show reluctance towards healthy and renewable materials. Implementation of sustainable materials for energy retrofitting is slowed down due to gaps in legislation and effective strategic programs, availability of bio-based materials, lack of knowledge regarding use and maintenance of renewable products, and marketing lobbies. Use of bio-based materials in refurbishment is important due to their negative or low global warming potential (GWP), low primary energy (PEI) need for production, cost-effective benefits, and recycling/reuse potential. Role of environmentally friendly solutions and low-carbon economy growth is particularly relevant in developing countries, such as Bosnia-Herzegovina, that cannot afford innovative energy recovery systems, yet possess a significant amount of poorly managed building stock. This research aims to analyze frameworks regarding retrofitting of residential buildings in Bosnia-Herzegovina and Slovenia. The analysis tackles indirect causes, studies the legal background, and examines strategic frameworks; thus, it indicates potential barriers for implementation of recommended retrofitting solutions based on renewable materials.
System of prefabricated modules installed on the existing building envelope is one alternativesolution for deep energy refurbishment of buildings in the European Union. It allows thermalupgrade installation of new parts in the HVAC system. Moreover, some elements of the envelopecan be made of renewable materials. This research compares the residential building stock andidentifies potential types of buildings for energy refurbishment in Bosnia and Herzegovina andSlovenia. It presents refurbishment possibilities of existing residential building stock in bothcountries with prefabricated timber panels. It also presents potential obstacles to the widerapplication of this refurbishment solution.
Rezime:Visoki energetski zahtjevi i potreba za energetskim certifikovanjem zgrade značajno utiču na projektovanje i izvođenje objekta. Rad ima za cilj da prikaže energetske performanse omotača zgrade obrazovanja u pasivnom i niskoenergetskom standardu u klimatskim uslovima zone sjever za Republiku Srpsku (Bosna i Hercegovina). Studija slučaja projekta nove zgrade Arhitektonsko-građevinsko-geodetskog fakulteta, čija je izgradnja počela 2011. godine u Banjoj Luci, predstavlja osnovu za predstavljeno istraživanje. Vizionarski pogled na izgradnju pasivne zgrade za obrazovanje zahtijevao je značajne investicije koje, nažalost, nisu bile obezbijeđene. Troškovi planirane izgradnje novog koncepta su smanjeni, ne samo na osnovu smanjenja energetskih performansi omotača zgrade, nego i na osnovu tehničkih sistema grijanja, završnih slojeva poda, opreme i sl. U radu su prezentovane izmjene energetskih performansi omotača zgrade i njihovog uticaja na transmisione i ventilacione gubitke, a samim tim i na potrebnu energiju za grijanje objekta. Klјučne riječi: projektni parametri, energetske performanse omotača zgrade, pasivni standard, niskoenergetski standard, zgrada obrazovanja ENERGY PERFORMANCE OF THE EDUCATIONAL BUILDING ENVELOPE ACCORDING TO A PASSIVE AND LOW-ENERGY STANDARD Abstract:High energy demands and obligation for building energy certification make an impact on architectural design and building construction. The paper aims to present energy performance of the educational building envelope in a passive and low-energy standard in the climatic conditions of the north zone of the Republic of Srpska (Bosnia and Herzegovina). The case study of design project for the building of Faculty of Architecture, Civil engineering and Geodesy, which construction started in 2011 in Banja Luka, serves as the basis for the presented research . The original plan for passive educational building development required large investments, which unfortunately were not provided. Planned 179 construction costs with new concept were reduced, not only with lower requirements of the envelope energy performance, but also technical systems such as heating type, lower costs on finishing layers of floors, furnishing etc. The paper presents changes in energy performance of the building envelope and its impact on transmission and ventilation heat losses, as well as the energy needs for heating.
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