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Dynamic modeling of local district heating grids with prosumers: A case study for Norway

District heating (DH) will play an important role in the future fossil-free energy systems by enabling increased utilization of waste heat and renewable heat sources to cover buildings' heat demand. A prerequisite for this is a reduction in the distribution temperature and shift towards...

Authors
Hanne Laura Pauliina Kauko
Karoline Husevåg Kvalsvik
Daniel Rohde
Natasa Nord
Åmund Utne
Year
2018
Type
Academic article
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Publication

Performance mapping of the R744 ejectors for refrigeration and air conditioning supermarket application: A hybrid reduced-order model

The continuous derivation of the ambient temperature and cooling demand in CO2 refrigeration and air-conditioning systems equipped with multi-ejector modules for supermarkets requires the analysis of the fixed ejector utilisation in a very wide range of the operational envelope. Therefore...

Authors
Michal Haida
Jacek Smołka
Armin Hafner
Zeimowit Ostrowski
Michał Palacz
Kenneth B. Madsen
Sven Försterling
Andrzej J. Nowak
Krzysztof Banasiak
Year
2018
Type
Academic article
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Publication

Premixed hydrogen-air flames interacting with a hydrogen porous wall

A laminar one-dimensional hydrogen-air flame travelling and quenching towards a chemically inert permeable wall (PW) is studied. Hydrogen flows through the wall into the premixed H2-air. The S3D numerical code with detailed chemistry is used. PW results are compared against results of an...

Authors
Prashant Siddlinggayya Salimath
Ivar Ståle Ertesvåg
Andrea Gruber
Year
2018
Type
Academic article
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Publikasjon

Sikker toveis fiskevandring forbi vannkraftverk : kunnskapsoppdatering og mønsterpraksis

Denne rapporten gir en oppsummering av kunnskap om toveis fiskevandring forbi vannkraftverk. Basert på oppsummeringen og internasjonal praksis anbefales mønsterpraksis for fiskepassasjer. Rapporten er en del av SafePass-prosjektet, som primært omhandler fiskeartene laks, ørret, harr og ål, og...

Authors
Hans-Petter Fjeldstad
Ulrich Pulg
Torbjørn Forseth
Year
2018
Type
Research report
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