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Energy-Saving Solutions for Five Hospitals in Europe Read chapter Read first chapter

2017 | OriginalPaper | Chapter

39. Energy Performance of a Renovated Multi-Family Building in Sweden

Authors : Lina La Fleur, Bahram Moshfegh, Patrik Rohdin

Published in: Mediterranean Green Buildings & Renewable Energy

Publisher: Springer International Publishing

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Abstract

Increased attention is being directed towards reducing energy use in buildings, and implementing energy-saving measures when renovating buildings has become of central importance. The aim of this chapter is to study the effects on heat demand of a deep renovation of a Swedish post-war, multi-family building. The studied building was renovated in 2014, and the renovation measures included thermal improvement of the climate envelope and installation of a mechanical supply and exhaust air ventilation system with heat recovery. The effect on heat demand is studied through a whole-building energy simulation, using IDA Indoor Climate and Energy. The IDA model is empirically validated with regard to its ability to predict indoor temperature and energy use. The results indicate a technical potential for a 50.3 % reduction of heat demand from implemented renovation measures, but measured data indicate that actual energy use is around 15 % higher than the technical potential. The reasons for this gap could be overestimated heat recovery efficiency or airing.

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previous chapter Exploitation of Wave Energy Potential in Aegean Sea: Greece
next chapter Building Thermal Exergy Analysis
Footnotes
1
Calculated \( {Q}_{\mathrm{t}}={\displaystyle \sum U\cdot A} \), where Qt is the total transmission losses (W/°C), U the overall heat transfer coefficient (W/m2,°C) and A the area (m2).
 
2
Calculated \( {Q}_{\mathrm{v}}=\overset{.}{m}\cdot {C}_{\mathrm{p}} \), where \( \overset{.}{m} \) is the ventilation mass flow (kg/s) and Cp the specific heat capacity of air (J/kg, °C).
 
3
Calculated \( {Q}_{\mathrm{v}}=\left(1-\eta \right)\cdot {\overset{.}{m}}_{\mathrm{exaust}}\cdot {C}_{\mathrm{p}} \), where η is the heat recovery efficiency, \( {\overset{.}{m}}_{\mathrm{exhaust}} \) the exhaust ventilation mass flow (kg/s) and Cp specific heat capacity of air (J/kg,°C).
 
4
The Sveby programme is a Swedish national development programme for understanding building energy performance (http://​www.​sveby.​org/​om-sveby/​).
 
5
STRÅNG is a mesoscale model for solar radiation developed by SMHI (the model can be accessed at http://​strang.​smhi.​se/​).
 
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Metadata
Title
Energy Performance of a Renovated Multi-Family Building in Sweden
Authors
Lina La Fleur
Bahram Moshfegh
Patrik Rohdin
Copyright Year
2017
Book
Mediterranean Green Buildings & Renewable Energy

Print ISBN: 978-3-319-30745-9

Electronic ISBN: 978-3-319-30746-6

Copyright Year: 2017

DOI
https://doi.org/10.1007/978-3-319-30746-6_39