Blar i Institutt for energi og prosessteknikk på tidsskrift "E3S Web of Conferences"
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A Simplified Power Sizing Method for the Correct Building Integration of Wood Stoves
(Journal article; Peer reviewed, 2019)Wood stoves are widely used in dwellings for space heating, however transient heat output and relatively large heat emission might cause problems with over-heating in new well-insulated buildings. This paper introduces a ... -
Adaptive Linear Grey-Box Models for Model Predictive Controller of Residential Buildings
(Peer reviewed; Journal article, 2022)Model predictive control (MPC) is an advanced optimal control technique to minimize a control objective while satisfying a set of constraints and is well suited to activate the building energy flexibility. The MPC controller ... -
Analysis of energy signatures and planning of heating and domestic hot water energy use in buildings in Norway
(Journal article; Peer reviewed, 2019)Widespread introduction of low energy buildings (LEBs), passive houses, and zero emission buildings (ZEBs) are national target in Norway. In order to achieve better energy performance in these types of buildings and ... -
Analysis of monthly and daily profiles of DHW use in apartment blocks in Norway
(Peer reviewed; Journal article, 2020)Profiles of domestic hot water (DHW) use give valuable information for achieving energy saving in buildings. In this article, analysis of monthly and hourly profiles in apartment blocks in Norway was performed. The aim was ... -
Can we meet the requirement for ultra-clean operation room (10CFU/m3) with dilution ventilation?
(Journal article; Peer reviewed, 2019)The objective of this study is to analyse what conditions may, and may not take place during surgery in a dilution ventilated operating room (OR), to fulfil an ultra-clean requirement (10 CFU/m3). To achieve the objective, ... -
CO2-based grey-box model to estimate airflow rate and room occupancy
(Journal article; Peer reviewed, 2019)In the existing building stock, heating, cooling and ventilation often run on fixed schedules assuming maximal occupancy. However, fitting the control of the HVAC system to the building’s real demand offers large potential ... -
Control strategy for battery-supported photovoltaic systems aimed at peak load reduction
(Journal article; Peer reviewed, 2019)The use of photovoltaic (PV) technologies is one of the key means for achieving the balance between operational power demand and generation in net Zero Energy Buildings (nZEBs). However, direct use of PV power on-site is ... -
Data-driven analysis of electricity use for office buildings: a Norwegian case study
(Peer reviewed; Journal article, 2021)Buildings are major consumers of primary energy and main contributors to carbon emission. To improve energy efficiency, it is essential to understand the characteristics of energy use in buildings. This study uses an in-use ... -
Development of a data-driven model to characterize the heat storage of the building thermal mass in energy planning tools
(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 ... -
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 ... -
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 ... -
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 ... -
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 ... -
Study of a water-source CO2 heat pump for residential use: experimental discharge pressure control and performance analysis
(Peer reviewed; Journal article, 2021)The heat pumps with the refrigerant of carbon dioxide (CO2), i.e., CO2 heat pumps, have the merits of low price and environmentally friendliness in comparison with those with traditional refrigerants, e.g., hydrochlorofl ...