Blar i NTNU Open på tidsskrift "E3S Web of Conferences"
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DHW tank sizing considering dynamic energy prices
(Peer reviewed; Journal article, 2021)Due to the rapid development of the building stock in Norway, the energy use in this segment is drastically increasing. Therefore, improving the energy performance of buildings becoming an urgent problem. Among technical ... -
Energy flexibility potential of domestic hot water systems in apartment buildings
(Peer reviewed; Journal article, 2021)Domestic Hot Water (DHW) storage tanks are identified as a main source of flexible energy use in buildings. As a basis for energy management in apartment buildings, this paper describes the aggregated DHW use in a case ... -
Evaluation of an acoustic Doppler technique for bed-load transport measurements in sand-bed Rivers
(Journal article; Peer reviewed, 2018)The bottom tracking (BT) feature of the acoustic Doppler current profilers (ADCP) have emerged as a promising technique in evaluating the bed load. Strong statistical correlations are reported between the ADCP BT velocity ... -
Experiences with CLT Construction in Norway
(Peer reviewed; Journal article, 2020)The use of cross-laminated timber (CLT) elements in buildings is an innovative and upcoming construction method. In Norway, due to its eco-friendly potential, more widespread use of the method is expected despite limited ... -
Experiences with external drainage systems from compact roofs in Norwegian climates
(Peer reviewed; Journal article, 2020)To reduce loads on urban drainage systems and facilitate local infiltration of stormwater, it is desired to lead runoff water from roofs through external drains and into the local soil. However, in cold climates, situations ... -
Hydraulic physical model production with Computer Numerically Controlled (CNC) manufacturing techniques
(Journal article; Peer reviewed, 2018)Physical models are a well-accepted tool in hydraulic engineering, allowing for the detailed characterisation of flow processes and the validation of structure designs with complex boundary conditions. The methods used to ... -
Identifying typical hourly DHW energy use profiles in a hotel in Norway by using statistical methods
(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 ... -
Indoor air quality in natural-ventilated bedrooms in renovated Norwegian houses
(Peer reviewed; Journal article, 2021)The objective of this work is to investigate the indoor environment in bedrooms ventilated by window opening during night-time. How window opening behaviour affects indoor air quality (IAQ), and how window opening behaviour ... -
Influence of thermal zoning and electric radiator control on the energy flexibility potential of Norwegian detached houses
(Journal article; Peer reviewed, 2019)Energy flexibility of buildings can be used to reduce energy use and costs, peak power, CO2eq- emissions or to increase self-consumption of on-site electricity generation. Thermal mass activation proved to have a large ... -
Integrating Thermal-Electric Flexibility in Smart Buildings using Grey-Box modelling in a MILP tool
(Peer reviewed; Journal article, 2022)In a smart grid setting, building managers are encouraged to adapt their energy operations to real-time market and weather conditions. However, most literature assume stationary temperature set points for heating and ... -
Numerical modelling of bank failures during reservoir draw-down
(Journal article; Peer reviewed, 2018)Numerical algorithms are presented for modeling bank failures during reservoir flushing. The algorithms are based on geotechnical theory and the limit equilibrium approach to find the location and the depth of the slides. ... -
Operation strategies to achieve low supply and return temperature in district heating system
(Journal article; Peer reviewed, 2019)English -
Optimal control of secondary side supply water temperature for substation in district heating systems
(Journal article; Peer reviewed, 2019)Low temperature is the most significant feature of the future district heating system- the 4th generation district heating (4GDH). However, a widely used control strategy for supply water temperature in substation is ... -
Optimal investment in the energy system of Zero Emission Neighborhoods considering the refurbishment of the building stock
(Peer reviewed; Journal article, 2021)To increase the impact that Zero Emission Neighbourhoods (ZEN) can have in the effort to decrease CO2 emissions, the refurbishment of the existing building stock is a parameter that should be considered. The existing ... -
Overheating risk of a typical Norwegian residential building retrofitted to higher energy standards under future climate conditions
(Peer reviewed; Journal article, 2020)Heat waves had attacked Norway in 2018 and 2019. Residents in Norway experienced a very uncomfortable indoor environment in the summer of 2018 and 2019. Few publications on the overheating risk of a typical Norwegian ... -
Parametric Energy Simulations of a Nordic Detached House Heated by a Wood Stove
(Peer reviewed; Journal article, 2020)Wood stoves are widely used in Nordic countries. They offer a good opportunity to use biomass for space-heating and to reduce the peak power of all-electric buildings. However, wood stoves are highly concentrated heat ... -
Performance analysis of an active diffuser in mixing ventilation for cell office by using numerical approach
(Journal article; Peer reviewed, 2019)Energy efficiency in buildings is nowadays considered as an essential step to reduce CO2 emissions and energy utilization. At the same time, new technologies such as building space heating using active air heating has ... -
Short term measurements of indoor air quality when using the home office in Norway
(Peer reviewed; Journal article, 2021)In 2020, due to the outbreak of COVID-19 many workers have been sent home to avoid the sickness spread. As a result, rooms that otherwise had domestic use, living rooms or bedrooms, have become offices. This change has ... -
Sizing and performance analyses of a combined heating and cooling system with the integration of short- and long-term storages
(Peer reviewed; Journal article, 2021)Technological advancements in the utilization of renewable energy sources have unveiled potentials for increasing building energy efficiency. Integrating heat pump-based energy systems with thermal storages is a suitable ... -
Solutions for retrofitting existing, wooden houses in cold climates
(Peer reviewed; Journal article, 2020)Upgrading existing one-family houses to higher energy standards can be a challenge for owners, among others, due to the unclear status of technical regulations in the case of retrofitting at the national level. Retrofitting ...