Naslov
Nearly Zero Energy Building Standard for Existing Buildings: Case Study of Residential Units

Autori
Krstić, Hrvoje ; Teni, Mihaela

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
The 14th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES) / - Dubrovnik, 2019, 1-12

Skup
The 14th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES)

Mjesto i datum
Dubrovnik, Hrvatska, 01.10.2019. - 06.10.2019

Vrsta sudjelovanja
Pozvano predavanje

Vrsta recenzije
Podatak o recenziji nije dostupan

Ključne riječi
Nearly zero energy building, renovation, construction periods, construction technology, costs, natural gas
(Nearly zero energy building, renovation, construction periods, construction technology, costs, natural gas.)

Sažetak
Energy Performance of Building Directive (EPBD) 2010/31/EU introduced nearly zero energy building (NZEB) standard for new buildings. But existing energy-inefficient buildings will consume great amount of energy unless renovated. This issue is revised in EPBD 2018/844/EU which is setting a framework aiming at long term renovation of existing building stock. The main characteristic of existing building stock is irrationally high energy consumption. Furthermore, the largest share in energy consumption as well as in total construction corresponds to residential building sector. Studies have shown that more than 80% of these buildings do not meet energy efficiency requirements of current legislation. Large energy consumption in buildings is mostly related to the construction period. The construction period has an important role in buildings' energy demand since it is related and represents characteristic construction technology, characteristic building materials used and the legislation on thermal protection of buildings. Therefore, buildings are usually classified into several construction periods according to the age and type of construction and depending on the legislative environment. This paper presents evaluation of the renovation potential of existing residential buildings to NZEB in terms of technical possibilities and economic feasibility. Case study was made on three residential units representative for their construction period. Analysed residential units were chosen to correspond to periods of buildings built between 1961 and 1970, between 1971 and 1980, and between 1981 and 1990. All buildings are in Osijek, Croatia. Infrared thermography and field measurements of airtightness were made as well in order to obtain information regarding initial state of residential units. Results presented in this research give information about construction technology possible to apply during renovation, renovation costs, energy (natural gas and electricity) consumption cost reduction and simple payback periods for proposed renovation measures. Sensitivity analysis method was applied to determine influence of energy price change on payback periods of proposed measures. Results are presented and analysed for three different buildings from three different construction periods.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

Napomena
This work has been fully supported by Croatian Science Foundation under Grant No. IP-2016-06- 8350 "Methodological Framework for Efficient Energy Management by Intelligent Data Analytics" (MERIDA).

POVEZANOST RADA