Purpose: The building sector accounts for 40 % of the total energy consumption in
Sweden today, and the largest proportion is consumed during the operating phase. From
the year 2020 and onwards, all new buildings should be erected as zero-emissionbuildings.
The building’s design can reduce energy demands, but the current legal
requirements do not favour energy-efficient designs. This study focuses on the design’s
importance for the energy efficiency of buildings, i.e., energy-saving design. The
impact of specific measures is difficult to calculate due to the complexity of reality.
This study aims to highlight the measures that could reduce energy consumption in
Method: In order to provide answers to the issues stated in the report and to achieve
the objective of the study, case studies are being conducted investigating three
commercial buildings where deliberate decisions were made to use energy-reducing
measures. Results and conclusions are based on qualitative interviews and literature
Findings: The energy-reducing design measures found to be of most importance used
in the studied buildings are the form factor, the window portion and the thermal storage
capacity. Moreover, significant savings are possible by carefully consider how solar
energy can be limited or used in the building. Generally, buildings tends to become
more technical, therefore technical knowledge early in the process is important to reach
a good result. Economic incentives and clear objectives with right focus are also
important for optimizing a building’s energy performance. The wording and the
requirement levels in the Swedish building regulations highly controls the construction
of energy efficient buildings.
Implications: This study shows how energy efficient design is made today and
provides an indication of what can be done and what should be prioritized. By imposing
requirements on consumed energy instead of bought, energy efficient design could be
favoured. Furthermore, this study suggests that a balance between windows, façade and
solar shading are important energy-reducing measures. Regardless of selected energyreducing
measures, a good performance is essential. Finally, this study shows that a
methodical use of existing knowledge and technology makes a difference.
Limitations: A lifecycle approach provides an overall picture of a building’s energy
consumption. However, this study is based on the energy consumption during the
operating phase. The result of this study does not take economic or aesthetic factors
into account. This study is a comparative case study and is based on few but carefully
matched cases. The selected cases are commercial buildings where deliberate decisions
were made to use energy-reducing measures.
2015. , 32 p.
Energy reducing design, energy efficiency, cooling demand, heating demand, thermal storing capacity, sensitivity analysis, double skin facade, dynamic solar shading, building envelope
Energireducerande utformning, energieffektivisering, kylbehov, uppvärmningsbehov, termisk lagringsförmåga, känslighetsanalys, dubbelglasfasad, dynamisk solavskärmning, klimatskal