Impacts that are contributing to a gap between designed and achieved energy savings in buildings

Transcription

1 Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture University of Split, Croatia Impacts that are contributing to a gap between designed and achieved energy savings in buildings Sandro Nižetić, Nikolina Goleš

2 Table of contents Introduction Impacts that are causing a gap between designed and achieved energy savings in buildings Concept of the novel building evaluation methodology Conclusion 2

3 Introduction Buildings are responsible for around 40% of the overall primary energy consumption, The importance of energy efficiency projects, The most used indicator in the case of buildings, i.e. energy certificate is not realistic indicator, It is not rare case in the practice when difference between the design and achieved energy savings occurs. 3

4 Impacts that are causing a gap between designed and achieved energy savings in buildings Influences that are causing a gap between designed and achieved energy savings 4

5 Impacts that are causing a gap between designed and achieved energy savings in buildings Technical impacts: design installed equipment equipment explotation legislative other influences 5

6 Impacts that are causing a gap between designed and achieved energy savings in buildings Behavioural impacts: occupants maintenance staff building management other influences 6

7 Concept of the novel building evaluation methodology Based on two essential aspects: 1. even if buildings can be classified in several categories, it is important to understand that each building is singular and it is a hard task to standardize them; 2. technical and behavioural impacts are correlated so none of their sub-categories can be neglected. 7

8 Concept of the novel building evaluation methodology It should contain all impacts that affect realistic achieved energy saving, or at least the most influential one: 8

9 Concept of the novel building evaluation methodology BI = behavioral index; 9

10 Conclusion In general, impact can be divided to the technical one and one that are related to the behavioural issues. Technical impacts are more or less predictable, unlike behavioural impacts, which are more complex one but their impact on the energy consumption in buildings is significant one. We have briefly introduced novel approach (methodology) as useful evaluation criteria, based on the energy efficiency building dissipation rate which contain all previously defined factors and this approach is currently under research. This new proposed building evaluation methodology could be used in the stage of the economic evaluation of the possible investments in the specific building facilities because unlike others, it would give results that are more close to the reality. 10

11 Thank you for Your attention! Sandro Nižetić, PhD, Associate Professor Vice Dean for Research and International Relations ASHRAE fellow-member of the Student Activities Committee-ASHRAE Danube chapter, ASHRAE University of Split student branch advisor Nikolina Goleš, PhD Student Research Associate, Junior Project Manager ASHRAE Student Branch, University of Split president 11