Shining examples analysed within the EBC Annex 56 project

Abstract

The International Energy Agency established an Implementing Agreement within the Energy in Buildings and Communities Program to undertake research and provide an international focus on "Cost Effective Energy and Carbon Emissions Optimization in Building Renovation" (EBC Annex 56). The project aims at developing a new methodology to enable cost effective renovation of existing buildings while optimizing energy consumption and carbon emissions reduction. Several case studies were gathered to develop and validate the methodology, and a selection of "Shining Examples" was made to encourage decision makers to promote efficient and cost effective renovations. This paper presents the results of the analyses made on these Shining Examples. Highlights: • Several building renovation projects were gathered within EBC project Annex 56. • Optimization of costs, energy and emissions requires flexible approaches. • Combination of energy efficiency measures and renewable energy is necessary. • Solutions depend of local opportunities and constraints, ownership and local laws. • Benefits of the renovation measures go beyond functionality and energy savings.

Measured and predicted energy use and indoor climate before and after a major renovation of an apartment building in Sweden

“…Numbers are all collected from [53] unless otherwise indicated. [5][6][7][8][9][10][11][12][13][14][15][16][17][18][19].8°C in the reference zones, which is lower than the recommended indoor temperature in Sweden of 21°C. In 2015 and after the renovation was performed, the building used 49.4 MWhDH.…”

“…Significant energy use reductions were also seen in the renovations where solar installations have been implemented. [11] Gothenburg, Sweden Gårdsten X X X X 263 145 45% [11] Gothenburg, Sweden Katjas gata X X 178 52 71% [11] Linköping, Sweden Magistratshagen X X 131 80 39% [12] Halmstad, Sweden Maratonvägen X X 145 92 37% [13,14] Hvalso, Denmark Traneparken X X X 139 96 31% [15] Roskilde, Denmark Sems Have X X X 156 51 67% [13,14] Kapfenberg, Austria Kapfenberg X X X X 146 46 68% [13,14] Vilnius, Estonia Project I-464 X X 212 132 38% [16] * including domestic hot water…”

Energy Use and Perceived Indoor Environment in a Swedish Multifamily Building before and after Major Renovation

“…More than half of the buildings in the EU were built when requirements on energy performance were less strict, and renovation of these buildings is one important part of improving energy efficiency in the building stock [5]. Significant reduction in energy use as a result of renovation has been demonstrated in several previous studies [6][7][8][9][10][11]. Renovation also has the potential to improve indoor environment, especially thermal comfort, as demonstrated in [7,8,12,13].…”

Life-cycle costs and impacts on energy-related building renovation assessments

“…Taking advantage of one of the several case studies of the project [9], different renovation scenarios were analysed -both with and without the embodied energy -, in order to verify its relevance to the renovation process.…”