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Affiliated projects

Activating the building construction for Building environment (The Sino-Danish Research project)

Description:

Activation of the building construction is a new promising concept that offers new possibilities for energetic optimization of energy flows in buildings and for control of the energy balances in time and space. It has the potential to considerably increase the energy efficiency of the heating and cooling systems as well as the utilization of renewable energy sources by requiring low temperature for heating and high temperature for cooling (low exergy systems). By its energy storage capabilities it also has the potential to reduce the peak loads and to offer the energy supply grid high flexibility by its ability to shift energy needs to periods of high production or low requirements.

Furthermore a more efficient and optimal way of controlling the indoor environment is to split the control of room temperature (thermal comfort) and indoor air quality (ventilation) on separate systems. However, the development and optimal exploitation of the technology offers a number of challenges that this project will find solutions to overcome.

The conducted research will lead to new knowledge on energy flows in building that will form the basis for development of models for predicting performance of activated building constructions and for development of new concepts. These concepts will combine activated building constructions, building services systems (HVAC) and renewable energy sources into one system and will lead to new possibilities for utilization of renewable energy in buildings.

The project has also the purpose to strengthen the relations and research cooperation between key research groups in Denmark and China within the area of energy efficiency in buildings and to exploit their key complementary competences.

Funding / support:

  • Det Strategiske Forskningsråd, Programkomiteen for Bæredygtig Energi og Miljø

Project Manager:

  • Per Heiselberg, Aalborg Universitet, Institut for Byggeri og Anlæg

Project participants:

Denmark

Aalborg University:

  • Per Heiselberg
  • Jérôme Le Dréau
  • Michal Pomianowski

Danish Technical University:

  • Bjarne W. Olesen
  • Benjamin Behrendt
  • Jørgen Erik Christensen
  • Lei Fang

China

Tsinghua University:

  • Prof. Jiang Yi
  • Prof. Zhu Yingxin
  • Prof. Zhang Yinping
  • Prof. Yang Xudong
  • Dr. Liu Xiaohua

Tianjing University:

  • Prof. Zhu Neng
  • Prof. Zhang Yufeng
  • Dr. Zhao Jing

Project Period:

April 1, 2010 – March 31, 2013.

Bolig+ Zero Emission Building Concept

Description:

Energy use in buildings globally accounts for a major part, close to 40%, of the primary energy use and, 24% of the green house gas emissions. Of course, the level of energy use varies by country due to climate, population density, building standards and use of renewable energy sources. Irrespectively of the location, buildings can be both direct (on-site use of fossil fuels) and indirect sources of emissions (grid use from electricity, district heating/cooling systems and energy used for fabrication of construction's materials).

High energy use in the building sector has been a constant issue of discussion over the last couple of decades. Already, in late 80s in order to reduce buildings energy use the concept of ‘passive houses' was developed, which in time and with progressing technology evolved into ultra low-energy building, zero emission building and finally into zero energy building concepts.

The aim of this PhD-thesis is a comprehensive investigation of the ‘Zero Energy/Emission Building concept' (ZEB). The first part will focus on review and analysis of existing ZEB definitions and already constructed Zero Energy/Emission Buildings: main design principles, technologies and solutions in order to select the best methods for saving and producing energy from renewable energy sources in a building. Afterwards, based on previous studies working definitions will be developed, separately for ‘zero energy' and ‘zero emission' concepts and, for three scenarios: Autonomous (offgrid) building, Autonomous (off-grid) group of buildings and On-grid building will be developed.

In order to analyse the potential of ZEB performance in Danish context the created definitions will be applied to a study case - Bolig+ building. The analysis will be realised using thermal building simulation software and EnergyPLAN model. The results of the simulations will allow carrying out Life Cycle Cost evaluation of the above mentioned ZEB definitions in order to verify their financial viability in Denmark. Finally, suitable definition for ‘Zero Energy/Emission Building' in Danish context will be recommended.

Financial support:

EUDP

Project leader:

  • Kim B. Wittchen, Statens Byggeforskningsinstitut

Participants:

  • Kim B. Wittchen, Aalborg Universitet, Statens Byggeforskningsinstitut
  • Søren Ø. Jensen, Teknologisk Institut
  • Anna Joanna Marszal, Aalborg Universitet, Institut for Byggeri og Anlæg
  • Per Heiselberg, Aalborg Universitet, Institut for Byggeri og Anlæg
  • Henrik Lund, Aalborg Universitet, Institut for Samfundsudvikling og Planlægning

Project period:

01. nov 2008 - 31. okt 2011

Website:

Energy renovation of typical buildings – example collection

Description:

The energy saving potential by energy renovating the existing building stock in Denmark is high, but the implementation of energy savings are implemented only to a limited extent. To encourage energy renovations of buildings there is a need to improve the basis for evaluation and selection of the best energy saving solutions.

The aim is to promote the implementation of energy conservation in existing buildings by developing a method for planning of extensive energy renovations to the low energy class 1 level. There is a need that also existing buildings can be low-energy buildings, so the energy demand throughout the building stock can be lowered significantly, and to a level where it is realistic that the energy demand can be met with renewable energy. The method is based on detailed analyses at component level of the impact of a few energy saving initiatives carried out in buildings. The analyses are carried out for typical building types, and the results will form an example collection of good energy renovation solutions for buildings that represent the total building stock in Denmark.

The method, including the examples, will form a strong and reliable basis for implementation of the best energy saving initiatives in various building types. Besides energy savings, energy renovations will often bring improved indoor climate conditions. This important additional benefit will also be evaluated in the form of improved comfort, less health risk and increased productivity.

Financing/support:

EUDP

Project leader:

  • Svend Svendsen, Danmarks Tekniske Universitet, Institut for Byggeri og Anlæg

Participants:

  • Henrik Tommerup, DTU Byg (Bygningsfysik og Installationer)
  • Diana Lauritsen, DTU Byg (Bygningsfysik og Installationer)
  • Bjarne Olesen, DTU Byg (Indeklima)
  • Per Heiselberg, Aalborg Universitet, Institut for Byggeri og Anlæg
  • Søren Aggerholm, Statens Byggeforskningsinstitut, Aalborg Universitet
  • Søren Østergaard Jensen, Teknologisk Institut
  • Reto M. Hummelshøj, COWI A/S

Project period:

1. April 2008 – 31. December 2009.

Total Energy Use in Buildings: Analysis & Evaluation Methods

Description:

One of the most significant barriers for achieving the goal of substantially improving energy efficiency of buildings is the lack of knowledge about the factors determining the real energy use. There is often a significant discrepancy between the designed and the real total energy use in buildings, in which a complex array of factors play a significant role, including the user / occupant behaviour.

The reasons for this discrepancy are generally poorly understood, and often have more to do with the role of human behaviour than the building design. The ultimate outcome of this project is strengthening the robust prediction of energy usage in buildings, thus enabling the proper assessment of short- and long-term energy measures, policies, technologies. The main objectives are to:

  1. develop a new methodology for analysis of building energy use that makes it possible to investigate the effects of the main influencing factors
  2. demonstrate how these data can be used to provide meaningful indicators of energy performance of buildings (for example expression of energy use for different end uses that are generally applicable among different buildings)
  3. develop a methodology for performance prediction of energy saving policies and technologies that includes the influence of a number of related factors development of methodologies and technologies for long term monitoring of the energy use in buildings.

Project leader:

  • Prof Hiroshi Yoshino (Operating Agent), Department of Architecture and Building Science, Graduate School of Engineering, Tohoku University, Japan

Participants:

  • Henrik Brohus, Aalborg Universitet, Institut for Byggeri og Anlæg
  • Tine S. Larsen, Aalborg Universitet, Institut for Byggeri og Anlæg
  • Per Heiselberg, Aalborg Universitet, Institut for Byggeri og Anlæg

Project period:

1. November 2008 – 31. Oktober 2012

Website:

Towards Net Zero Energy Solar Buildings

(IEA SHC task 40 / ECBCS Annex 52)

Beskrivelse:

Energy use in buildings worldwide accounts for over 40% of primary energy use and 24% of greenhouse gas emissions . Energy use and emissions include both direct, on-site use of fossil fuels as well as indirect use from electricity , district heating/cooling systems and embodied energy in construction materials.

Given the global challenges related to climate change and resource shortages, much more is required than incremental increases in energy efficiency. Currently, a prominent vision proposes so called “net zero energy”, "zero net energy", “net zero carbon” or “EQuilibrium” buildings . Although these terms have different meaning and are poorly understood, several IEA countries have adopted this vision as a long-term goal of their building energy policies .

What is missing is a clear definition and international agreement on the measures of building performance that could inform “zero energy” building policies, programs and industry adoption.

Financial support:

EUDP

Project leader:

  • Mark Riley (operating agent), S&T Director, CanmetENERGY, Natural Resources Canada

Participants:

  • Kim B. Wittchen, Aalborg Universitet, Statens Byggeforskningsinstitut
  • Søren Ø. Jensen, Teknologisk Institut
  • Anna Joanna Marszal, Aalborg Universitet, Institut for Byggeri og Anlæg
  • Per Heiselberg, Aalborg Universitet, Institut for Byggeri og Anlæg

Project period:

1. oktober 2008 – 30. september 2013

Website:

Zero Energy Buildings Database

The Zero Energy Buildings Database features profiles of commercial buildings that produce as much energy as they use over the course of a year. This database highlights projects from across the country and provides ideas that can be applied to any new building.
 
The Zero Energy Buildings Database is part of the High Performance Buildings Database which lists many additional projects. Visit the High Performance Buildings Database to discover more energy efficient building techniques.

Financial support 

EUDP

Project leader 

  • Mark Riley (operating agent), S&T Director, CanmetENERGY, Natural Resources Canada

Participants

  • Kim B. Wittchen, Aalborg Universitet, Statens Byggeforskningsinstitut
  • Søren Ø. Jensen, Teknologisk Institut
  • Anna Joanna Marszal, Aalborg Universitet, Institut for Byggeri og Anlæg
  • Per Heiselberg, Aalborg Universitet, Institut for Byggeri og Anlæg

Project period 

1. oktober 2008 – 30. september 2013

Visit the zero energy building database