Alireza Afshari
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View article: Investigation of Vibrational Frequency of Canine Vocal Folds Using a Two-Way Fluid-Solid Interaction Analysis
Investigation of Vibrational Frequency of Canine Vocal Folds Using a Two-Way Fluid-Solid Interaction Analysis Open
Introduction Speech is an integral component of human communication, requiring the coordinated efforts of various organs to produce sound (Titze & Alipour, 2006). The glottis region, a key player in voice production, assumes a crucial role…
View article: Legionella in Primary School Hot Water Systems from Two Municipalities in the Danish Capital Region
Legionella in Primary School Hot Water Systems from Two Municipalities in the Danish Capital Region Open
Legionella contamination in public water systems poses significant health risks, particularly in schools where vulnerable populations, including children, regularly use these facilities. This study investigates the presence of Legionella i…
View article: Review on Advanced Storage Control Applied to Optimized Operation of Energy Systems for Buildings and Districts: Insights and Perspectives
Review on Advanced Storage Control Applied to Optimized Operation of Energy Systems for Buildings and Districts: Insights and Perspectives Open
In the context of increasing energy demands and the integration of renewable energy sources, this review focuses on recent advancements in energy storage control strategies from 2016 to the present, evaluating both experimental and simulat…
View article: A methodical approach for the design of thermal energy storage systems in buildings: An eight‐step methodology
A methodical approach for the design of thermal energy storage systems in buildings: An eight‐step methodology Open
Recent research focuses on optimal design of thermal energy storage (TES) systems for various plants and processes, using advanced optimization techniques. There is a wide range of TES technologies for diverse thermal applications, each wi…
View article: Low-order aquifer thermal energy storage model for geothermal system simulation
Low-order aquifer thermal energy storage model for geothermal system simulation Open
This paper presents a low order aquifer thermal energy storage (ATES) model for simulation of combined subsurface and above-surface energy systems. The model is included in the Modelica IBPSA Library, which is a free open-source library wi…
View article: Improving Occupants’ Satisfaction with Mechanical Ventilation using Technical and Non-Technical Solutions:Slutrapport til højnelse af tilfredsheden med mekanisk ventilation i renoverede etageboliger
Improving Occupants’ Satisfaction with Mechanical Ventilation using Technical and Non-Technical Solutions:Slutrapport til højnelse af tilfredsheden med mekanisk ventilation i renoverede etageboliger Open
This project focuses on evaluating occupants' and building management staff's experiences with mechanical ventilation in renovated residential buildings in Denmark. It proposes technical and non-technical solutions to increase satisfaction…
View article: Evaluation of Elastic Filament Velocimetry (EFV) Sensor in Ventilation Systems: An Experimental Study
Evaluation of Elastic Filament Velocimetry (EFV) Sensor in Ventilation Systems: An Experimental Study Open
Determination of airflow rates is an inevitable part of the energy-efficient control of ventilation systems. To achieve efficient control, the flowmeters used must be suitably accurate and create minimum disturbance to the airflow. In this…
View article: Cellulose acetate-TiO<sub>2</sub> and activated carbon electrospun composite fibre membranes for toluene removal
Cellulose acetate-TiO<sub>2</sub> and activated carbon electrospun composite fibre membranes for toluene removal Open
The VOCs removal from polluted air has been achieved using several different methods but primarily through the use of adsorbent materials or through degradation with photocatalytic oxidation (PCO). Fibres produced by electrospinning have t…
View article: Towards designing an aggregator to activate the energy flexibility of multi-zone buildings using a hierarchical model-based scheme
Towards designing an aggregator to activate the energy flexibility of multi-zone buildings using a hierarchical model-based scheme Open
Aggregators are emerging players in the future power markets which aggregate the flexibility of small consumers. This paper proposes a hierarchical model-based scheme to activate the energy flexibility of multi-zone buildings through a dir…
View article: Indoor Occupancy Detection Based on Environmental Data Using CNN-XGboost Model: Experimental Validation in a Residential Building
Indoor Occupancy Detection Based on Environmental Data Using CNN-XGboost Model: Experimental Validation in a Residential Building Open
Indoor occupancy prediction can play a vital role in the energy-efficient operation of building engineering systems and maintaining satisfactory indoor climate conditions at the lowest possible energy use by operating these systems on the …
View article: A Numerical Parametric Study of a Double-Pipe LHTES Unit with PCM Encapsulated in the Annular Space
A Numerical Parametric Study of a Double-Pipe LHTES Unit with PCM Encapsulated in the Annular Space Open
Latent heat thermal energy storage (LHTES) with Phase Change Materials (PCM) represents an interesting option for Thermal Energy Storage (TES) applications in a wide temperature range. A tubular encapsulation model of an LHTES with PCM was…
View article: Precision Ventilation for an Open-Plan Office: A Study of Variable Jet Interaction between Two Active Chilled Beams
Precision Ventilation for an Open-Plan Office: A Study of Variable Jet Interaction between Two Active Chilled Beams Open
Precision ventilation is developed to achieve thermal comfort for occupants in an office by creating micro-climate zones. The present study aims to achieve individual thermal comfort for occupants with different metabolic rates by using hi…
View article: The role of design parameters on the performance of diffuse ceiling ventilation systems – thermal comfort analyses for indoor environment
The role of design parameters on the performance of diffuse ceiling ventilation systems – thermal comfort analyses for indoor environment Open
Thermal comfort conditions profoundly affect the occupants’ health and productivity. A diffuse ceiling ventilation system is an air distribution system in which the air is supplied to the occupied zone with relatively a low velocity throug…
View article: Thermal Properties of Novel Phase-Change Materials Based on Tamanu and Coconut Oil Encapsulated in Electrospun Fiber Matrices
Thermal Properties of Novel Phase-Change Materials Based on Tamanu and Coconut Oil Encapsulated in Electrospun Fiber Matrices Open
The accumulation of thermal energy in construction elements during daytime, and its release during a colder night period is an efficient and green way to maintain a comfortable temperature range in buildings and vehicles. One approach to a…
View article: Testing Portable Air Cleaning Units –Test Methods and Standards:A Critical Review
Testing Portable Air Cleaning Units –Test Methods and Standards:A Critical Review Open
As the portable air cleaners are becoming more common in our buildings and the range of products on offer is growing, it’s becoming more difficult for the ordinary consumer to make the right choice. Manufacturers make claims about efficien…
View article: An aquifer thermal energy storage model for efficient simulations of district systems
An aquifer thermal energy storage model for efficient simulations of district systems Open
Thermal energy storage systems are valuable assets to enable high penetration of renewable energy sources into district heating and cooling (DHC) systems. One of the main benefits of using thermal storage is that it can contribute to match…
View article: Precision Ventilation in an Open-Plan Office: A New Application of Active Chilled Beam (ACB) with a JetCone Feature
Precision Ventilation in an Open-Plan Office: A New Application of Active Chilled Beam (ACB) with a JetCone Feature Open
Mixing ventilation systems effectively improves thermal comfort in open-spaces due to adequate turbulent mixing of the cold stream with ambient air. This study introduces the concept of precision ventilation for achieving local thermal com…
View article: Investigating the flexibility of a novel multi-zone air heating and ventilation system using model predictive control
Investigating the flexibility of a novel multi-zone air heating and ventilation system using model predictive control Open
In forced air heating systems, there are basically two approaches to set the temperature of each zone within a multi-zone building: regulating the supply airflow rate and regulating the supply air temperature (or a combination of these two…
View article: Performance evaluation of active chilled beam systems for office buildings – A literature review
Performance evaluation of active chilled beam systems for office buildings – A literature review Open
The applications of Active Chilled Beam (ACB) technology have increased over the two decades and received a lot of attention in research publications due to its ability to provide a suitable indoor climate for building occupants with minim…
View article: Filtration Performance of Ultrathin Electrospun Cellulose Acetate Filters Doped with TiO2 and Activated Charcoal
Filtration Performance of Ultrathin Electrospun Cellulose Acetate Filters Doped with TiO2 and Activated Charcoal Open
Air filters are crucial components of a building ventilation system that contribute to improving indoor air quality, but they are typically associated with relatively high pressure drops. The purpose of the study is to evaluate the effect …
View article: Correlation of Respiratory Aerosols and Metabolic Carbon Dioxide
Correlation of Respiratory Aerosols and Metabolic Carbon Dioxide Open
Respiratory aerosols from breathing and talking are an important transmission route for viruses, including severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Previous studies have found that particles with diameters ranging from…
View article: Development of a Modelica-based simplified building model for district energy simulations
Development of a Modelica-based simplified building model for district energy simulations Open
Urban Building Energy Simulation (UBES) is an efficient tool to investigate and subsequently reduce energy demand of urban areas. Nevertheless, UBES has always been a challenging task due the trade-off between accuracy, computational speed…
View article: Towards an automated generator of urban building energy loads from 3D building models
Towards an automated generator of urban building energy loads from 3D building models Open
Buildings in cities are one of the major contributors of carbon emissions worldwide. Thus improving building energy efficiency is one of the key strategies towards sustainable urbanization. Urban building energy modeling (UBEM) is a valuab…