Scientific Journal Articles

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Future Trends in District Heating Development

This article describes challenges that should be overcome towards implementation of low-temperature district heating (LTDH). The trends in development, operational issues, and legislative framework were revised.

Tymofii Tereshchenko, Natasa Nord
Year: 2018
Journal : Current Sustainable/Renewable Energy Reports
Volume : 5 (2)
Pages : 172-180

From Zero Emission Buildings (ZEB) to Zero Emission Neighbourhoods (ZEN): A Mapping Review of Algorithm-Based LCA

The building industry is responsible for approximately 40% of energy consumption and 36% of greenhouse gas emissions in the European Union (EU). The most efficient way of reducing a building’s environmental impact is addressing it in the design stage. Here, design freedom is the greatest, but uncertainty is high and there is a nearly limitless number of design options.

Christofer Skaar, Nathalie Labonnote, Klodian Gradeci
Year: 2018
Journal : Sustainability
Volume : 10
Pages : 1-19

Influence of occupant behavior and operation on performance of a residential Zero Emission Building in Norway

Influence of occupant behavior on a residential ZEB was analyzed.
Occupant behavior may change the annual energy balance reliability by 20%.
Occupant behavior may result in grid stress variation from −5% to +13%.
Window openings and DHW would not change significantly the ZEB energy performance.

Natasa Nord, Tymofii Tereshchenko, Live Holmedal Qvistgaard, Ivar S. Tryggestad
Year: 2018
Journal : Energy and Buildings
Volume : 159
Pages : 75-88

Using a segmented dynamic dwelling stock model for scenario analysis of future energy demand: The dwelling stock of Norway 2016–2050

A dynamic and segmented dwelling stock model is applied for energy analyses.
A case study was conducted for the Norwegian dwelling stock 2016–2050.
More advanced and/or frequent renovation give limited additional energy savings.
Use of local energy sources, e.g. heat pumps and PV, has a large future potential.
User behaviour is likely to strongly reduce the real energy savings in the system.

Nina Holck Sandberg, Igor Sartori, Magnus I. Vestrum, Helge Brattebø
Year: 2017
Journal : Energy and Buildings
Volume : 146
Pages : 220-232

The impact of Zero Energy Buildings on the Scandinavian energy system

We analyse cost-optimal integration of ZEBs in the Scandinavian energy system.
We capture impact of short-term uncertainty on long-term investment decisions.
ZEBs reduce the investments in the electricity and heating sector.
The Scandinavian electricity sector is capable of integrating ZEBs with PV.
The operation of the flexible hydropower is changed with ZEBs.

Pernille Seljom, Karen Byskov Lindberg, Asgeir Tomasgard, Gerard Doorman, Igor Sartori
Year: 2017
Journal : Energy
Volume : 118
Pages : 284-296

Analysis of the impact resolution has on load matching in the Norwegian context

Generation of energy at building level has an increasing interest in Norway, as in rest of Europe. Load matching is the correlation between the buildings generation and load, which in most cases aims at optimization of the amount of self-consumption. When analysing generation in relation to load, it is of interest to study the choice of resolution and what impact this has on load match indicators. This study analyses the importance of choosing the right resolution, starting with hourly measurements, and going down towards one-minute resolution.

Kari Sørnes, Eyvind Fredriksen, Ketil Tunheim, Igor Sartori
Year: 2017
Journal+ : Energy Procedia
Volume : 132
Pages : 610-615

Thermal conductivity of cement stabilized earth blocks

Thermal conductivity of cement stabilized earth blocks (CSEB) increases with bulk density.
Thermal conductivity of CSEB slightly varies with the addition of cement.
Compressive strength of CSEB increases with increasing cement content.

Lei Zhang, Arild Gustavsen, Bjørn Petter Jelle, Liu Yang, Tao Gao, Yu Wang
Year: 2017
Journal : Construction and Building Materials
Volume : 151
Pages : 504-511