Browsing NTNU Open by Author "Justo Alonso, Maria"
Now showing items 1-20 of 22
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Adapting the Design Procedures of Heat Pump Systems to nZEB
Ytterhus, Mikkel (Master thesis, 2015)Several changes in the previous Simulink model have been conducted. This have significantly reduced computational time and made the model more user friendly. A more realistic representation of the ground source and the ... -
Assessing the indoor air quality and their predictor variable in 21 home offices during the Covid-19 pandemic in Norway
Justo Alonso, Maria; Moazami, Therese Nitter; Liu, Peng; Jørgensen, Rikke Bramming; Mathisen, Hans Martin (Peer reviewed; Journal article, 2022)In this study, concentrations of pollutants: formaldehyde, carbon dioxide (CO2), and total volatile organic compounds (TVOC) and parameters: indoor room temperature and relative humidity (RH) were measured in 21 home offices ... -
The borehole thermal energy storage at Emmaboda, Sweden: First distributed temperature measurements
Ramstad, Randi Kalskin; Justo Alonso, Maria; Acuna, José; Andersson, Olof; Stokuca, Milan; Håkansson, Niklas; Midttømme, Kirsti; Rydell, Leif (Peer reviewed; Journal article, 2022)Xylem in Emmaboda, Sweden, has one of the first borehole thermal energy storage (BTES) sites storing excess heat and has been previously thoroughly studied and monitored. Here, the results from distributed temperature ... -
Development and optimization of highly efficient heat recoveries for low carbon residential buildings
Liu, Peng; Justo Alonso, Maria; Mathisen, Hans Martin; Halfvardsson, Anneli (Peer reviewed; Journal article, 2022)To achieve energy efficiency and lower carbon emissions, building envelopes have become tighter and more insulated. These buildings must have mechanical ventilation with high efficient heat recovery to provide adequate ... -
Energibruk og inneklima i skoler og barnehager med "mixed-mode" ventilasjon
Algrøy, Marianne (Master thesis, 2014)Oppgaven er en studie av energibruk og inneklima i skoler og barnehager med mixed mode ventilasjon, med fokus på termisk- og atmosfærisk inneklima ved vinduslufting og resulterende energiforbruk. Det er tatt utgangspunkt ... -
Evaluation of low-cost formaldehyde sensors calibration
Justo Alonso, Maria; Madsen, Henrik; Liu, Peng; Jørgensen, Rikke Bramming; Jørgensen, Thomas Berg; Christiansen, Even Johan; Myrvang, Olav Aleksander; Bastien, Diane; Mathisen, Hans Martin (Peer reviewed; Journal article, 2022)Low-cost sensors (LCS) are becoming ubiquitous in the market; however, calibration is needed before reliable use. An evaluation of the calibration of eight identical pre-calibrated formaldehyde LCS is presented here. The ... -
Frost formation in membrane based flat plate heat exchangers
Wiik, Idar (Master thesis, 2014)The objective of the Research Centre ZEB is to eliminate greenhouse gas emissions from buildings. Reducing the energy consumption in buildings is a means to that end. The use of membrane based plate heat exchangers can ... -
Frost formation in membrane based flat plate heat exchangers
Wiik, Idar (Master thesis, 2014)The objective of the Research Centre ZEB is to eliminate greenhouse gas emissions from buildings. Reducing the energy consumption in buildings is a means to that end. The use of membrane based plate heat exchangers can ... -
Global sensitivity analysis and optimal design of heat recovery ventilation for zero emission buildings
Liu, Peng; Justo Alonso, Maria; Mathisen, Hans Martin (Peer reviewed; Journal article, 2023)Energy-efficient building services are necessary to realise zero-emission buildings while maintaining adequate indoor environmental quality. As the share of ventilation heating needs grow in well-insulated and airtight ... -
Heat Recovery in Combination with Different Heat Pump Solutions for Energy Supply
Solberg, Atle (Master thesis, 2015)The main purpose of this Master's thesis has been to investigate the performance of different methods of heat recovery from ventilation air. Comparisons have been made with regard to delivered energy for heating of domestic ... -
Heat recovery ventilation design limitations due to LHC for different ventilation strategies in ZEB
Liu, Peng; Justo Alonso, Maria; Mathisen, Hans Martin (Journal article; Peer reviewed, 2022) -
Holistic methodology to reduce energy use and improve indoor air quality for demand-controlled ventilation
Justo Alonso, Maria; Liu, Peng; Marman, Stine Flage; Jørgensen, Rikke Bramming; Mathisen, Hans Martin (Peer reviewed; Journal article, 2022)Ventilation control logics are usually based on the control indicators of occupancy. However, strategies including control of contaminants not linked to occupancy are requested and more feasible with the introduction in ... -
Membrane Based Heat Exchanger
Aarnes, Sofie Marie (Master thesis, 2012)Reduction of the energy used to acclimatise buildings is a huge challenge simultaneously with the implementation of air tight low energy buildings. In residential buildings with several living units centralised air handling ... -
A methodology for the selection of pollutants for ensuring good indoor air quality using the de-trended cross-correlation function
Justo Alonso, Maria; Wolf, Sebastian; Jørgensen, Rikke Bramming; Madsen, Henrik; Mathisen, Hans Martin (Peer reviewed; Journal article, 2021)CO2 is customarily used to control ventilation as it is a proxy for bio-effluents and pollutants related to the presence and activity of people in the room. However, CO2 could not be a satisfactory indicator for pollutants ... -
A multi-objective optimisation framework to design membrane-based energy recovery ventilation for low carbon buildings
Liu, Peng; Mathisen, Hans Martin; Justo Alonso, Maria; Halfvardsson, Anneli (Peer reviewed; Journal article, 2023)Membrane energy exchangers (MEEs) are increasingly being studied and utilized to contribute to realising energy-efficient building services and providing satisfactory indoor environments. The performance of MEEs has been ... -
A review of heat recovery technologies and their frost control for residential building ventilation in cold climate regions
Bai, Hongyu; Liu, Peng; Justo Alonso, Maria; Mathisen, Hans Martin (Peer reviewed; Journal article, 2022)This study reviewed heat recovery technologies and their application in residential buildings in cold climates. The increasing efforts on reducing building energy use over the recent years have resulted in improved insulated ... -
Short term measurements of indoor air quality when using the home office in Norway
Justo Alonso, Maria; Jørgensen, Rikke Bramming; Mathisen, Hans Martin (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 ... -
Thermal comfort and energy use for cooling and heating in non-residential buildings
Skeie, Stina (Master thesis, 2018)Indoor environmental quality is important as 90% of time is spent indoors. Otherwise consequences can be reduced performance of work or fostered illnesses. Contrary, the building sector is responsible for 40% of the total ... -
Understanding the role of moisture recovery in indoor humidity: An analytical study for a Norwegian single-family house during heating season
Liu, Peng; Justo Alonso, Maria; Mathisen, Hans Martin; Halfvardsson, Anneli; Simonson, Carey J. (Journal article; Peer reviewed, 2022) -
The use of machine learning to determine moisture recovery in a heat wheel and its impact on indoor moisture
Liu, Peng; Justo Alonso, Maria; Mathisen, Hans Martin; Halfvardsson, Anneli (Peer reviewed; Journal article, 2022)Balanced mechanical ventilation equipped with heat recovery has been widely adopted in cold climates to ensure an acceptable indoor environment in energy-efficient buildings. An acknowledged trend to achieve more energy ...