Blar i SINTEF Community på forfatter "Walnum, Harald Taxt"
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Measurement of domestic hot water consumption in hotel rooms with different basin and shower mixing taps
Walnum, Harald Taxt; Stråby, Karolina; Sørensen, Åse Lekang (Peer reviewed; Journal article, 2021)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 shows results from a measurement ... -
Model predictive control of District Heating substations for flexible heating of buildings
Walnum, Harald Taxt; Sartori, Igor; Bagle, Marius (SINTEF Proceedings;5, Chapter; Peer reviewed; Conference object, 2020)The potential in cost and energy savings by replacing a feed forward weather compensated control (WCC) controlled radiator system with a linear MPC controller is investigated in a Modelica-Python setup. It is shown that ... -
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, ... -
Potensial- og barrierestudie. Energitjenester i næringsbygg
Fjellheim, Kristin; Lien, Synne Krekling; Walnum, Harald Taxt; Sandberg, Nina Holck; Cheng, Caroline Y; Fjellheim, Øystein (SINTEF rapport, Research report, 2021)Energibruk i næringsbygg unntatt industribygg utgjør 14 % (31 TWh i 2019) av total energibruk i Fastlands-Norge, og redusert energibruk i bygningsmassen er viktig i utviklingen av framtidens energisystem og for å frigjøre ... -
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 ... -
Sub-hourly measurement datasets from 6 real buildings: Energy use and indoor climate
Sartori, Igor; Walnum, Harald Taxt; Skeie, Kristian; Georges, Laurent Francis Ghislain; Knudsen, Michael D.; Bacher, Peder; Candanedo, José; Sigounis, Anna-Maria; Prakash, Anand Krishnan; Pritoni, Marco; Granderson, Jessica; Yang, Shiyu; Wan, Man Pun (Peer reviewed; Journal article, 2023)The data presented here were collected independently for 6 real buildings by researchers of different institutions and gathered in the context of the IEA EBC Annex 81 Data-driven Smart Buildings, as a joint effort to compile ... -
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 ... -
Toolkit for the planning of smart energy communities. PI-SEC report 2.3. Challenges and best practices from testing of the PI-SEC Planning Wheel
Nielsen, Brita Fladvad; Gohari, Savis; Hauge, Åshild Lappegard; Sørnes, Kari; Walnum, Harald Taxt; Uusinoka, Taru; Lindberg, Karen Byskov (PI-SEC;2.3, Research report, 2018)For at vi skal nå nullutslippsambisjonene, må de viktigste aktørene jobbe tettere sammen. Dette er fordi ulike virkemidler må settes inn i kombinasjon for å nå de høye målsetningene som de norske bykommunene har satt seg. ... -
Toolkit Testing in the Planning of Smart Energy Communities. PI-SEC Report 1.3 / 2.3 : Municipal practice and project planning
Nielsen, Brita Fladvad; Hauge, Åshild Lappegard; Sørnes, Kari; Walnum, Harald Taxt; Uusinoka, Taru (PI-SEC;1.3 / 2.3, Research report, 2018)Planning Instruments for Smart Energy Communities” (PI-SEC) is a Norwegian research project being carried out in the period April 2016 to March 2019. It is funded by the Research Council of Norway and aims to develop ...