• Characterization of heat load profiles in buildings and their impact on demand side flexibility 

      Walnum, Harald Taxt; Alonso, Maria Justo; Clauß, John; Lindberg, Karen Byskov (Journal article; Peer reviewed, 2019)
      A data set of heat load measurements for 197 buildings from different building categories (apartment blocks, hotels, nursing homes, offices and schools), have been analysed to evaluate the potential for peak shaving. A ...
    • Developing a scenario calculator for smart energy communities in Norway: Identifying gaps between vision and practice 

      Walnum, Harald Taxt; Hauge, Åshild Lappegard; Lindberg, Karen Byskov; Mysen, Mads; Nielsen, Brita Fladvad; Sørnes, Kari (Journal article; Peer reviewed, 2019)
      Key Performance Indicators are important instruments, both in defining high-level goals (international or national) and when planning smart energy communities. However, there is often a gap between the high-level goals, ...
    • Energy consumption for domestic hot water use in Norwegian hotels and nursing homes 

      Walnum, Harald Taxt; Sørensen, Åse Lekang; Ludvigsen, Bjørn; Ivanko, Dmytro (Journal article; Peer reviewed, 2019)
      Domestic Hot Water (DHW) production constitutes a significant proportion of the energy demand of modern buildings, and as the building envelope is improved the share increases. This article discusses the results from a ...
    • Heat analysis for energy management in neighbourhoods: case study of a large housing cooperative in Norway 

      Sørensen, Åse Lekang; Lindberg, Karen Byskov; Walnum, Harald Taxt; Sartori, Igor; Aakenes, Ulf Roar; Andresen, Inger (Journal article; Peer reviewed, 2019)
      As a basis for energy management in apartment blocks, this paper characterises heat use in a large housing cooperative in Norway, with in total 1,058 apartments. Heat measurements with hourly resolution are available from ...
    • Identifying typical hourly DHW energy use profiles in a hotel in Norway by using statistical methods 

      Ivanko, Dmytro; Nord, Natasa; Sørensen, Åse Lekang; Plesser, Thale Sofie Wester; Walnum, Harald Taxt; Sartori, Igor (Journal article; Peer reviewed, 2019)
      The aim of this research is to improve the existing approaches of domestic hot water (DHW) energy use analysis in buildings. A comprehensive statistical analysis of hourly DHW energy use for a hotel in Oslo, Norway, was ...
    • Off-design analysis of ORC and CO2 power production cycles for low-temperature surplus heat recovery 

      Walnum, Harald Taxt; Rohde, Daniel; Ladam, Yves (Journal article; Peer reviewed, 2013)
      Electricity production with an organic Rankine cycle and a transcritical Rankine cycle is investigated in this paper with R-123 and CO2 as working fluids, respectively. The analysis focuses on the off-design behavior with ...
    • Pilot Building Powerhouse Kjørbo. As Built Report 

      Sørensen, Åse Lekang; Andresen, Inger; Walnum, Harald Taxt; Alonso, Maria Justo; Fufa, Selamawit Mamo; Jenssen, Bjørn; Rådstoga, Olav; Hegli, Tine; Fjeldheim, Henning (ZEB Project report;35, Research report, 2017)
      Powerhouse Kjørbo, located in Sandvika near Oslo, consists of two office blocks from the 1980´s that have been upgraded to energy-efficient and modern offices. The Powerhouse goal is that the refurbished buildings over ...
    • Pipe sizing based on domestic hot water consumption in Norwegian hotels, nursing homes, and apartment buildings 

      Stråby, Karolina; Walnum, Harald Taxt; Sørensen, Åse Lekang (Journal article; Peer reviewed, 2019)
      Sizing of domestic hot water pipes are to a large extent based on calculations of peak flow rate according to current guidelines. This article compares detailed field measurements of peak flow rates in Norwegian hotels, ...
    • Prediction of DHW energy use in a hotel in Norway 

      Ivanko, Dmytro; Nord, Natasa; Sørensen, Åse Lekang; Sartori, Igor; Plesser, Thale Sofie Wester; Walnum, Harald Taxt (Journal article; Peer reviewed, 2019)
      Domestic hot water (DHW) systems are significant consumers of energy in buildings. This article is dedicated to hourly and daily DHW energy use modeling, with the aim of achieving energy savings in buildings. The methods ...
    • Preliminary toolkit for goals and KPIs 

      Walnum, Harald Taxt; Sørnes, Kari; Mysen, Mads; Sørensen, Åse Lekang; Almås, Anders-Johan (PI-SEC;, Research report, 2017)
      PI-SEC er et norsk forskningsprosjekt som påløper i tidsrommet april 2016 til mars 2019. Prosjektet er finansiert av Norges forskningsråd. PI-SEC står for "Planning Instruments for Smart Energy Communities", og prosjektet ...
    • Superchilling, ice fraction and quality 

      Stevik, Astrid; Haugen, Nils Erland L; Duun, Anne Sissel; Walnum, Harald Taxt; Nordtvedt, Tom Ståle (Chapter; Peer reviewed, 2010)
    • Thermal Energy Systems in ZEN: Review of technologies relevant for ZEN pilots 

      Walnum, Harald Taxt; Fredriksen, Eyvind (ZEN Report;3, Research report, 2018)
      This report reviews state-of-the-art on thermal energy systems for neighbourhoods. Main focus is on technologies related to 4th generation district heating (4GDH), biomass combined heat and power (CHP) systems, ground ...