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Grand challenges of wind energy science - meeting the needs and services of the power system

The share of wind power in power systems is increasing dramatically, and this is happening in parallel with increased penetration of solar photovoltaics, storage, other inverter-based technologies, and electrification of other sectors. Recognising the fundamental objective of power systems...

Authors
Mark O'Malley
Hannele Holttinen
Nicolaos Cutululis
Til Kristian Vrana
Jennifer King
Vahan Gevorgian
Xiongfei Wang
Fatemeh Rajaei-Najafabadi
Andreas Hadjileonidas
Year
2024
Type
Academic literature review
Publication

Prototype liquid chiller using carbon dioxide as refrigerant

A 40 kW cooling capacity liquid chiller using carbon dioxide (CO2) has been designed, built and tested experimentally. The prototype had the possibility to reject heat both to air and water. Both the water chiller and the gas coolers are new designs adapted for CO2. The water-cooled gas cooler was a...

Authors
Geir Skaugen
Year
2007
Type
Academic chapter/article/Conference paper
Publication

Towards a sustainable hydrogen economy: Hydrogen pathways and infrastructure

Results from the European HySociety project (2003?2005) are revealed in which political, societal and technical challenges for developing a European hydrogen economy have been addressed. The focus is placed on the assessments of hydrogen pathways and infrastructure. It will show that no chain can be...

Authors
Jens Hetland
Year
2007
Type
Academic article