Publications
Vacuum Insulation Panel Products: A State-of-the-Art Review and Future Research Pathways
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2014
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2014
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Innovative Technologies and Processes for Buildings – The Research Centre on Zero Emission Buildings
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Publication Year:
2014
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Publication Year:
2014
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Materialer i energi- og klimaregnskapet – Hvor viktig er det?
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2016
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2016
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Architectural Integration of Photovoltaic and Solar Thermal Collector Systems into buildings
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2012
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2012
Solar technologies in the form of photovoltaics and thermal collectors have not been used to the expectation specially in building sector to replace the use of fossil fuels. The main reason for these technologies not being popular in building integration is the lack of good architectural quality rendered not meeting desired design considerations. Hence, the objective of the thesis is to pave possible ways of integrating these technologies into buildings, both on existing and new constructions to add emphasis on the overall architectural expression in addition to producing energy. Basic focus is on the appearance of aesthetics part of integration…
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Analysis and design of solar based systems for heating and cooling of buildings
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2014
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2014
Abstract Thermal performance of the solar thermal systems are estimated using numerical methods and software since the solar processes are transitient in nature been driven by time dependent forcing functions and loads. The system components are defined with mathematical relationships that describe how components function. They are based on first principles (energy balances, mass balances, rate equations and equilibrium relationships) at one extreme or empirical curve fits to operating data from specific machines such as absorption chillers. The component models are programed i.e. they represent written subroutines which are simultaneously solved with the executive program. In this thesis for executive…
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Material research for Zero Emission Buildings
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2014
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2014
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Towards LCA of building automation and control system in zero emission buildings – measurements of auxiliary energy to operate a KNX BUS-system
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Publication Year:
2013
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Publication Year:
2013
The demands for both thermal comfort and reduced energy consumption in buildings have become a major driving force for the increased use of advanced building automation and control systems (BACS). In the on-going development of Zero Emission Buildings (ZEBs), it seems to be a common understanding that such systems are needed in order to save energy and reach the zero emission goals, and that energy consumption for their operation is negligible compared to the building needs and the energy saving potential BACS causes. However, sensors and actuators in automation and control systems require electricity to operate, and both the environmental…
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Passive House at the crossroads: The past and the present of a voluntary standard that managed to bridge the energy efficiency gap
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Publication Year:
2013
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Publication Year:
2013
Improving energy efficiency in dwellings is generally seen as the low-hanging fruit of climate change mitigation. In particular decreased heat loss through better insulation is suggested as one of the most cost-effective means to achieve the ambitious national and international goals of climate gas reduction. However, the literature shows that a profitable technological solution is not sufficient to reach the energy goals. Aspects such as a lack of information, unobserved costs, and heterogeneity among users can compromise the success of technical innovation. Still, there are successful concepts that drive the technological development in the construction sector. The Passive House is…
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Silica aerogels - A multifunctional building material
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Publication Year:
2015
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Publication Year:
2015
Abstract Silica aerogels are a nanoporous material with extremely high porosity (up to ~99.8 %), low density (as low as ~0.005 g/cm3), and low thermal conductivity (~0.010–0.020 W/(mK)). Aerogels can also be made with a translucent or transparent state. These structural and functional features make aerogels a multifunctional material for many important applications. In this work, we discuss the perspective of aerogels as super insulation materials and window glazings in the building and construction sector. It shows that different research and development (R&D) strategies of aerogels shall be considered when aiming for different applications; reducing the manufacture cost, improving the…
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Hollow Silica Nanospheres as a Super-Insulating Material
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Publication Year:
2013
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Publication Year:
2013
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Influence of PV technology and system design on the emission balance of a net zero emission building concept
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Publication Year:
2016
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Publication Year:
2016
Abstract This paper presents an analysis of how the design of a photovoltaic (PV) system influences the greenhouse gas emission balance in a net zero emission building (nZEB). In a zero emission building, the emissions associated both with the energy required in the operation of the building (operational emissions) and the energy used to produce the building materials (embodied emissions) are offset by renewable energy generated on-site (avoided emissions). The analysis is applied to a nZEB concept for a single-family building, developed by the Norwegian Research Centre on Zero Emission Buildings. Previous analyses have shown that the installation of a…
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Navigating standards – constituting engineering practices – how do engineers in consulting environments deal with standards?
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Publication Year:
2013
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Publication Year:
2013
Standards and regulations can play a central role in policies to achieve environmentally sound and energy-efficient buildings. This paper sets out to explore how consulting engineers relate to standards designed to impose sustainability in the construction of new buildings and in waste management. The paper addresses four cases of engineering practices. The first case describes practical skills and tools involved in what the engineers considered as ‘normal’ practices when performing energy calculations in the development of new buildings. The second and third cases deal with energy in new buildings as well, but address practices that supported or enabled the engineers…
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Vakuumisoleringspaneler i gamla byggnader
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Publication Year:
2015
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Publication Year:
2015
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Hvordan oppnå klimanøytrale bygg
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2010
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2010
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Fremtidens bygninger kan være det viktigste svaret på klimautfordringene
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Publication Year:
2010
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Publication Year:
2010
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Proposal for CO2-factor for electricity and outline of a full ZEB-definition
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Publication Year:
2011
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Publication Year:
2011
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Nanomaterials for Thermal Building Insulation
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Publication Year:
2011
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Publication Year:
2011
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Performance estimation and documentation of an integrated energy supply solution
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Publication Year:
2012
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2012
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Convective heat transfer between rooms in nordic passive houses
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Publication Year:
2015
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Publication Year:
2015
Abstract In highly-insulated buildings such as passive houses, the space-heating distribution subsystem can be simplified by reducing the number of heat emitters. In this context, the bi-directional flow through open doorways is known to be an efficient process to support the heat distribution between rooms. This process is therefore investigated using field measurements within a Norwegian passive house. The so-called large opening approximation proves to model fairly the mass flow rate, but also the convective heat transfer if the thermal stratification is accounted for. Furthermore, the discharge coefficient appears to be independent of the heater type and location in the…
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Grønt lys for ZEB
Publication Year:
2013
Publication Year:
2013
Forskning på nullutslippsbygg har fått gode resultater i Forskningsrådets evaluering, og ZEB får fortsette driften og forskningen i samme spor.
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Sustainable residential ventilation
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Publication Year:
2012
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Publication Year:
2012
Global warming due to increased emissions of CO2 has lead to more focus on decreasing energy consumption and greenhouse gas emissions caused by buildings. In Norway balanced ventilation with heat recovery is the most recommended solution for a low-emission building. However, a minority claims that a naturally ventilated house can be equally sustainable. To find out more about which concept is more sustainable, a model building with natural ventilation is compared to the same building with balanced ventilation in several cases. These are calculated in the computer-program SIMIEN, mainly with Oslo-climate. A sensitivity analysis of several parameters is also done.…
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Naturlig ventilasjon i nullutslippsbygg
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2015
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2015
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Kontorbygget som produserer mer energi enn det bruker
Publication Year:
2014
Publication Year:
2014
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Det store bildet. Hvor er vi nå?
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2012
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2012
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The ZEB project and Advanced Materials for Zero Emission Buildings
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Publication Year:
2011
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Publication Year:
2011
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ZEB Definition: Assessing the Implications for Design
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Publication Year:
2010
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Publication Year:
2010
Conceptually a Zero Emission Building (ZEB) is a building with greatly reduced energy demand and able to generate electricity (or other carriers) from renewable sources in order to achieve a carbon neutral balance. However, a rigorous and agreed definition of ZEB is yet to come. A parallel paper in this conference explains how a formal and comprehensive ZEB definition can be based on the evaluation of certain criteria. These criteria are extensively discussed in ongoing projects, both in Norway and internationally. The objective of this paper is to focus on two of these criteria: energy performance and credits used to…
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Effective ventilation in high performance buildings
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Publication Year:
2015
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Publication Year:
2015
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Spectroscopic properties of hexagonal sodium tungstate nanorods
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Publication Year:
2015
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Publication Year:
2015
Abstract Sodium tungstate (Na-WO3) nanorods with typical diameters of 10-200 nm and lengths of several microns were prepared via hydrothermal synthesis. X-ray diffraction showed that the material crystallized in a hexagonal phase (space groupP6/mmm) with unit cell dimensions of a = 7.3166(8) Å and c = 3.8990(8) Å. The as-prepared Na-WO3 nanorods showed a distinctive visible-light-driven photochromism related to a proton-electron double injection process. The involved localstructural evolutions were monitored by Fourier transform infrared (FTIR) and Raman scattering spectroscopy. One diagnostic FTIR absorption at 585 cm-1 and one Raman band at 813 cm-1 were identified and assigned to the O-W-O stretching vibration. These two modes were strongly affected by the…
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Vinduer i fremtidens kontorbygg – lag på lag og lav vekt på samme tid?
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Publication Year:
2015
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Publication Year:
2015
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Pilot eposide: Is Snøhetta’s energy-positive house the answer to our sustainable prayers?
Publication Year:
2014
Publication Year:
2014
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Effect of Ageing on Service Life of Vacuum Insulation Panels
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Publication Year:
2010
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Publication Year:
2010
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Frame Stability of Tunnel-Structured Cryptomelane Nanofibers: The Role of Tunnel Cations
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Publication Year:
2013
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Publication Year:
2013
The role of tunnel K+ ions on the growth and stability of tunnel-structured cryptomelane-type MnO2 nanofibers (denoted as cryptomelane nanofibers hereafter) has been discussed by means of X-ray diffraction and electron microscopy. Cryptomelane nanofibers with typical diameters of 20–80 nm and lengths of 1–6 μm have been synthesized by means of a simple hydrothermal reaction of KMnO4 and MnSO4 aqueous solutions at 140 °C. The growth of cryptomelane nanofibers under hydrothermal conditions follows a dissolution–recrystallization process and involves a morphological transformation from a layered precursor to the tunnel-structured cryptomelane, in which the K+ ions play important roles in templating and…
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Information about the ZEB Centre in Trondheim
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Publication Year:
2014
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2014
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Life Cycle Cost Perspectives on Zero Energy Renovation of a Single Family House
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Publication Year:
2012
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Publication Year:
2012
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Materialer i energi- og klimaregnskapet - Hvor viktig er det?
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Publication Year:
2015
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Publication Year:
2015
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Façade Integration Typologies of Photovoltaics. Architecture and sustainable development.
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Publication Year:
2011
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Publication Year:
2011
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Fremtidige krav til utforming av bærekraftige bygninger og energiforsyning
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Publication Year:
2015
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2015
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Energikonsepter for Ådland boligområde
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Publication Year:
2014
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Publication Year:
2014
I ZEB, og som en del av arbeidspakke 5 "Konsepter og strategier for nullutslippsbygg", er det gjennomført en studie av to energikonsepter for boligområdet Ådland i Bergen. Ådland ligger ved Flesland rett sør for Bergen sentrum. ByBo AS ønsker å bygge ut fra 500 – 800 boliger på området hvor både de enkelte boligene og området som helhet skal oppfylle kriterier for nullutslippsbygg. I ZEB er det definert ulike ambisjonsnivå for nullutslippsbygg. Den gjennomførte studien anbefaler et ambisjonsnivå ZEB-O som et gjennomsnitt for Ådland området. ZEB-O betyr at området skal være selvforsynt med energi, inklusive elektrisitet og varme, over et…
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Multi-Functional Building Envelopes: Key Properties, State-of-the-Art Technologies and Visions for the Future
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Publication Year:
2012
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Publication Year:
2012
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Her skal folk bo som forsøkskaniner
Publication Year:
2014
Publication Year:
2014
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Status ZEB – Zero Emission Buildings
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Publication Year:
2011
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Publication Year:
2011
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Professor savner solcellesatsing i Norge
Publication Year:
2016
Publication Year:
2016
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