Browsing Institutt for energi og prosessteknikk by Author "Georges, Laurent"
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Characterization of thermal energy needs of swimming pools using building performance simulation
Alvestad, Henrik (Master thesis, 2019)Svømmeanlegg er svært energikrevende bygg med svært avansert luftbehandlingsanlegg sammenlignet med for eksempel bolighus eller kontorbygg. Spesielt det store behovet for avfukting er karakteristisk for svømmeanlegg. På ... -
Characterizing the demand response potential of thermal heat load in buildings
Storlien, Elin (Master thesis, 2020)Utnyttelse av energifleksibilitet i bygg er fremhevet som en av løsningene for å opprettholde balansen i fremtidens energisystem, hvor uregulerbare energikilder vil utgjøre en stadig større andel. Målet med denne masteroppgaven ... -
Comparing the performance of RANS turbulence models between different cavity flow benchmarks
Larkermani, Elyas; Bjerkeli, Vegard Mikkelsen; Georges, Laurent (Chapter, 2022)To evaluate the performance of RANS turbulence models, this study compares four different cavity flow benchmarks using the prevailing two-equation turbulence models for indoor airflows, namely the standard and RNG k-ε and ... -
Computational Fluid Dynamics of airflows inside buildings: a comprehensive review of the cavity flow benchmark
Bjerkeli, Vegard Mikkelsen (Master thesis, 2021)Denne masteroppgaven presenterer en omfattende gjennomgang av «cavity flow» benchmarket, med den hensikt å validere RANS turbulensmodeller for mikseventilasjonsformål. CFD brukes mer og mer for luftstrømmer inne i bygninger. ... -
Computational Fluid Dynamics of Airflows inside buildings: RANS-LES of the cavity flow benchmark
Bjuri, Simon (Master thesis, 2023)Denne master oppgaven undersøker ytelsen til turbulensmodellerings metoder ved å bruke CFD på strømning i et tomt rom ved et tilfelle der man har full turbulent strømning og et annet tilfelle der man har transisjonell ... -
Convective Heat Transfer between Rooms in Nordic Passive Houses
Georges, Laurent; Mathisen, Hans Martin (Journal article; Peer reviewed, 2015)In highly-insulated buildings such as passive houses, the space-heating distribution subsystem can be simplified by reducing the number of heat emitters. In this context, the bi-directional flow through open doorways is ... -
Data pre-processing and optimization techniques for stochastic and deterministic low-order grey-box models of residential buildings
Yu, Xingji; Georges, Laurent; Imsland, Lars Struen (Journal article; Peer reviewed, 2021)Grey-box models are data-driven models where the structure is defined by the physics while the parameters are calibrated using data. Low-order grey-box models of the building envelope are typically used for two main ... -
Development of a data-driven model to characterize the heat storage of the building thermal mass in energy planning tools
Georges, Laurent; Storlien, Elin; Askeland, Magnus; Lindberg, Karen Byskov (Peer reviewed; Journal article, 2021)In the one hand, energy planning tools compute the cost-optimal investment in the energy system minimizing life cycle costs (LCC). These tools often consider optimal control. The building (or cluster of buildings) is ... -
Economic and Energy Performance of Heating and Ventilation. Systems in Deep Retrofitted Norwegian Detached Houses
Heide, Vegard; Thingbø, Håkon; Lien, Anne Gunnarshaug; Georges, Laurent (Peer reviewed; Journal article, 2022)The aim of this study was to evaluate the life-cycle costs (LCC) and energy performance of different heating and ventilation systems (HVAC) in deep-energy renovation of Norwegian detached houses. Eight different HVAC ... -
Economic Performance of Heating and Ventilation Systems in Energy Retrofit of Detached Houses
Kjellberg, Bianca; Johansen, Sondre Valstad (Master thesis, 2021)I forbindelse med Parisavtalen i 2015, satte Norge seg som mål å redusere drivhusgassene med 50% innen 2030. I 2019 gikk 23% av Norges energiforbruk til private husholdninger ifølge Statistisk Sentralbyrå. Videre er mer ... -
Economic Performance of Heating and Ventilation Systems of Detached Houses
Kjellberg, Bianca; Johansen, Sondre Valstad (Master thesis, 2021)I forbindelse med Parisavtalen i 2015, satte Norge seg som mål å redusere drivhusgassene med 50% innen 2030. I 2019 gikk 23% av Norges energiforbruk til private husholdninger ifølge Statistisk Sentralbyrå. Videre er mer ... -
Economic performance of heating systems for energy renovation of wooden dwellings in Norway
Thingbø, Håkon Selstad (Master thesis, 2022)Etter at Norge sluttet seg til i Parisavtalen i 2015, ble det satt som mål å redusere landets klimagassutslipp med 50 til 55 %, sammenlignet med 1990-nivået, innen 2030 [1]. Det ble derfor i 2016 vedtatt at energibruken ... -
Efficiency of the Hydronic System used for the Space-Heating of Passive Envelopes
Djordjevic, Nikola (Master thesis, 2012)The aim of this thesis is to determine the efficiency of the hydronic heating system implemented in building with passive envelopes. Thermal losses and energy consumption of the pump are relative values for determining the ... -
Energy efficiency of hydronic space-heating distribution systems in super-insulated residential buildings
Georges, Laurent; Iwanek, Tomasz; Thalfeldt, Martin (Chapter, 2017)In space-heating (SH) dominated climates, superinsulated building envelopes, such as passive houses (PH), are often promoted to drastically reduce SH needs. Using hydronic SH distribution in PH, thermal losses from pipes ... -
Energy efficiency of strategies to enable temperature zoning during winter in highly-insulated residential buildings equipped with balanced mechanical ventilation
Georges, Laurent; Selvnes, Eirik; Heide, Vegard; Mathisen, Hans Martin (Journal article; Peer reviewed, 2019)To reduce the space-heating needs, balanced mechanical ventilation equipped with a heat recovery is frequently implemented in highly-insulated residential buildings. This standard ventilation strategy tends to homogenize ... -
Energy Flexibility Characterization of Norwegian Residential Buildings Heated by Direct Electricity
Taksdal, Katrine; Johnsen, Thea (Master thesis, 2018)The objective of this thesis is to evaluate the energy flexibility that Norwegian residential buildings can provide to the electricity grid, by applying rule-based control (RBC) strategies. Aspects that are assumed to ... -
Energy flexibility of Norwegian residential buildings using demand response of electricity-based heating systems: A study on residential demand side flexibility, heating system control, and time-varying CO2eq. intensities of the electricity mix
Clauß, John (Doctoral theses at NTNU;2019:225, Doctoral thesis, 2019)The transition to a sustainable energy system requires a shift to intermittent renewable energy sources, which call for increased flexibility on the demand side. Heat pumps offer the possibility to couple the electricity ... -
Environmental and economic performance of heating systems for energy-efficient dwellings: case of passive and low-energy single-family houses
Georges, Laurent; Massart, Catherine; Van Moeseke, Geoffrey; De Herde, André (Journal article; Peer reviewed, 2012)In order to reduce the energy consumption of the building stock, a major trend is to drastically reduce the space-heating (SH) needs by improving the thermal performance of the envelope. In general, this measure is combined ... -
Evaluation Method for the Hourly Average CO2eq. Intensity of the Electricity Mix and Its Application to the Demand Response of Residential Heating
Clauß, John; Stinner, Sebastian; Solli, Christian; Lindberg, Karen Byskov; Madsen, Henrik; Georges, Laurent (Journal article; Peer reviewed, 2019)This work introduces a generic methodology to determine the hourly average CO2eq. intensity of the electricity mix of a bidding zone. The proposed method is based on the logic of input–output models and avails the balance ... -
Evaluation of a New System Combining Wood-Burning Stove, Flue Gas Heat Exchanger and Mechanical Ventilation with Heat Recovery in Highly-Insulated Houses
Cablé, Axel; Georges, Laurent; Peigné, Pierre; Skreiberg, Øyvind; Druette, Lionel (Journal article; Peer reviewed, 2019)The performance of an innovative flue gas heat exchanger (FGHE) located at the exit of a wood-burning stove (log or pellet) to pre-heat ventilation air has been assessed for highly insulated detached houses. For this ...