Advanced

Single and Double Skin Glazed Office Buildings - Analyses of Energy Use and Indoor Climate

Poirazis, Harris LU (2008) In Report EBD-T--08/8
Abstract
The energy efficiency and thermal performance of highly glazed office buildings are often questioned. However, nowadays glazed buildings are increasingly being built around the world, mainly due to an architectural trend, followed by the preference of companies to a distinctive image that a glazed office building can provide. Due to insufficient knowledge concerning the performance as to energy use and indoor environment of glazed office buildings, a project was initiated, in order study their possibilities and limitations for Scandinavian conditions. The aim of this PhD thesis is to (a) determine how the energy and indoor climate performance can be analysed, (b) clarify and quantify how highly glazed facades affect the energy use and... (More)
The energy efficiency and thermal performance of highly glazed office buildings are often questioned. However, nowadays glazed buildings are increasingly being built around the world, mainly due to an architectural trend, followed by the preference of companies to a distinctive image that a glazed office building can provide. Due to insufficient knowledge concerning the performance as to energy use and indoor environment of glazed office buildings, a project was initiated, in order study their possibilities and limitations for Scandinavian conditions. The aim of this PhD thesis is to (a) determine how the energy and indoor climate performance can be analysed, (b) clarify and quantify how highly glazed facades affect the energy use and thermal comfort and (c) determine how the design can be improved with regard to energy efficiency, thermal and visual comfort.

The first part of this project involved establishing a reference building with different single skin glazed alternatives, choosing simulation tools and carrying out simulations for the determined alternatives. Results were obtained through varying the building’s orientation, the interior layout and the type of glazing and solar shading devices. In the second part, the performance of various double skin façade cavity alternatives was studied, in order to study the possibilities and limitations of the system’s performance. Simulations on an office zone and a building level were then carried out, in order to achieve optimal integration of the system.

The results showed that, unless designed carefully, highly glazed buildings tend to perform poorly, resulting in increased energy use and poorer thermal environment. For Swedish climatic conditions during winter months, windows with low thermal transmittance are essential, in order to improve the building’s energy performance and thermal comfort, especially for highly glazed buildings. Low g and especially geffective values have a positive effect in lowering the cooling demand; externally placed shading or double skin facades can have this effect. In general, double skin façades result in improved energy and thermal performance of the building mainly when applied on the south façade, but their impact is limited since the cooling demand is usually rather limited, compared with the heating demand, for Scandinavian climatic conditions.

Achieving improved building performance when using fully glazed façades can be a great challenge. Individual building design that takes into consideration the type of façade including the size and type of glazing, the position of shading devices, the temperature set points, the building occupancy and plan type can definitely lead to improved building performance. If this is established, even in highly glazed cases, the building performance may reach reasonable levels as to energy use and indoor climate. However, a building with low energy demand cannot be achieved by a highly glazed building in a Scandinavian climate. (Less)
Please use this url to cite or link to this publication:
author
supervisor
opponent
  • Tekn. dr. Bryn, Ida, Erichsen & Horgen A/S Oslo, Norway.
organization
publishing date
type
Thesis
publication status
published
subject
keywords
thermal environment, indoor climate, energy use, building performance, building simulations, double skin façades, Glazed office buildings, single skin façades, thermal comfort
in
Report EBD-T--08/8
pages
406 pages
publisher
Energy and Building Design, Lund University
defense location
Room A:B, A-building, Sölvegatan 24, Lund University Faculty of Engineering.
defense date
2008-02-25 13:15
ISSN
1651-8136
ISBN
978-91-85147-23-6
language
English
LU publication?
yes
id
294589a6-7a52-42c7-8abf-a860d6fd7413 (old id 963839)
date added to LUP
2008-01-29 11:02:59
date last changed
2016-09-19 08:44:49
@phdthesis{294589a6-7a52-42c7-8abf-a860d6fd7413,
  abstract     = {The energy efficiency and thermal performance of highly glazed office buildings are often questioned. However, nowadays glazed buildings are increasingly being built around the world, mainly due to an architectural trend, followed by the preference of companies to a distinctive image that a glazed office building can provide. Due to insufficient knowledge concerning the performance as to energy use and indoor environment of glazed office buildings, a project was initiated, in order study their possibilities and limitations for Scandinavian conditions. The aim of this PhD thesis is to (a) determine how the energy and indoor climate performance can be analysed, (b) clarify and quantify how highly glazed facades affect the energy use and thermal comfort and (c) determine how the design can be improved with regard to energy efficiency, thermal and visual comfort.<br/><br>
The first part of this project involved establishing a reference building with different single skin glazed alternatives, choosing simulation tools and carrying out simulations for the determined alternatives. Results were obtained through varying the building’s orientation, the interior layout and the type of glazing and solar shading devices. In the second part, the performance of various double skin façade cavity alternatives was studied, in order to study the possibilities and limitations of the system’s performance. Simulations on an office zone and a building level were then carried out, in order to achieve optimal integration of the system. <br/><br>
The results showed that, unless designed carefully, highly glazed buildings tend to perform poorly, resulting in increased energy use and poorer thermal environment. For Swedish climatic conditions during winter months, windows with low thermal transmittance are essential, in order to improve the building’s energy performance and thermal comfort, especially for highly glazed buildings. Low g and especially geffective values have a positive effect in lowering the cooling demand; externally placed shading or double skin facades can have this effect. In general, double skin façades result in improved energy and thermal performance of the building mainly when applied on the south façade, but their impact is limited since the cooling demand is usually rather limited, compared with the heating demand, for Scandinavian climatic conditions. <br/><br>
Achieving improved building performance when using fully glazed façades can be a great challenge. Individual building design that takes into consideration the type of façade including the size and type of glazing, the position of shading devices, the temperature set points, the building occupancy and plan type can definitely lead to improved building performance. If this is established, even in highly glazed cases, the building performance may reach reasonable levels as to energy use and indoor climate. However, a building with low energy demand cannot be achieved by a highly glazed building in a Scandinavian climate.},
  author       = {Poirazis, Harris},
  isbn         = {978-91-85147-23-6},
  issn         = {1651-8136},
  keyword      = {thermal environment,indoor climate,energy use,building performance,building simulations,double skin façades,Glazed office buildings,single skin façades,thermal comfort},
  language     = {eng},
  pages        = {406},
  publisher    = {Energy and Building Design, Lund University},
  school       = {Lund University},
  series       = {Report EBD-T--08/8},
  title        = {Single and Double Skin Glazed Office Buildings - Analyses of Energy Use and Indoor Climate},
  year         = {2008},
}