Publikasjoner og ansvarsområder
A frosting limit model of air-to-air quasi-counter-flow membrane energy exchanger for use in cold climates
Theoretical Prediction of Longitudinal Heat Conduction Effects on the Efficiency of the Heat Wheel Used for Ventilation in Powerhouse Building “Kjørbo” in Norway
The present study investigates effects of longitudinal heat conduction (LHC) on the heat recovery effectiveness of the heat wheel in the Powerhouse building “Kjørbo”. The effects LHC which are usually ignored in the heat wheel design play a relatively significant role in the heat wheel with high tem...
Simultaneously boosting the mass and fixed-carbon yields of charcoal from forest residue via atmospheric carbonization
The carbonization of various forest residues in comparison with their stem wood was studied by means of thermogravimetric analyzer operated non-isothermally at atmospheric pressure with a heating rate of 10K/min and a final temperature of 800 °C. GROT (tops and branches) and stem wood samples of Nor...
Energy Transfer and Energy Saving Potentials of Air-To-Air Membrane Energy Exchanger for Ventilation in Cold Climates
State-of-the-Art for the use of Phase-Change Materials in Tanks Coupled with Heat Pumps
With the goal of increasing heat storage in the same accumulation volumes, phase-change materials are considered. There are different substances with different phase-change temperatures that can be used for storing heating or cooling implemented in heat pump systems for applications of space heating...
Measured load profiles and heat use for “low energy buildings” with heat supply from district heating
In the development towards nearly zero energy buildings (nZEB) the load profiles for the heat demand and the heat use of the buildings are expected to be changed considerably compared to the situation today. This change will influence the design and the overall profitability of district heating (DH)...
A kinetic study on simultaneously boosting the mass and fixed-carbon yield of charcoal production via atmospheric carbonization
The mass and fixed-carbon yield of charcoal produced from woody biomass via atmospheric carbonization can be simultaneously improved by harnessing the phenomenon of secondary char formation as a result of prolonged contact time between pyrolysis gas and solid (char). In this study, the carbonization...