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View article: Exploring the potential to mitigate airborne transmission risks with convective and radiant cooling systems in an office
Exploring the potential to mitigate airborne transmission risks with convective and radiant cooling systems in an office Open
Funding Information: The study was supported by SUOJAILMA project funded by the Finnish Work Environment Fund (Grant No. 210099 ). HEATCLIM (Heat and health in the changing climate , Grant Numbers. 329306 , 329307 ) funded by the Academy o…
View article: Risk of Microbial Growth in Ventilation Ductwork Located in the Humid and Cold Conditions
Risk of Microbial Growth in Ventilation Ductwork Located in the Humid and Cold Conditions Open
High humidity inside ductworks could be a potential risk for microbial growth and there is also a hypothesis that lower night-time ventilation increases the risk of growth. This study investigates the possibility of microbial growth in ven…
View article: Numerical and Experimental Study on the Indoor Climate in a Classroom with Mixing and Displacement Air Distribution Methods
Numerical and Experimental Study on the Indoor Climate in a Classroom with Mixing and Displacement Air Distribution Methods Open
One main challenge of air distribution in classrooms is to guarantee ventilation performance under different usage conditions. In this study, the indoor climate in summer and winter conditions with different occupancy densities in the clas…
View article: Performance assessment of ventilative and radiant cooling systems in office buildings during extreme weather conditions under a changing climate
Performance assessment of ventilative and radiant cooling systems in office buildings during extreme weather conditions under a changing climate Open
| openaire: EC/H2020/856602/EU//FINEST TWINS | openaire: EC/H2020/894511/EU//SUREFIT Funding Information: This study is part of the following projects: HEATCLIM (Heat and health in the changing climate, Grant Numbers. 329306, 329307) funde…
View article: Weather impacts on simulated indoor conditions
Weather impacts on simulated indoor conditions Open
<p>According to the current National Building Code of Finland, the room temperature in new residential buildings should not exceed the threshold of 27 &#176;C by more than 150 degree hours per year. The code also demands that new…
View article: Operational Challenges of Modern Demand-Control Ventilation Systems: A Field Study
Operational Challenges of Modern Demand-Control Ventilation Systems: A Field Study Open
To maintain proper indoor air quality and increase energy efficiency, a demand-control ventilation (DCV) system has become a popular solution. This paper reports the findings of a field study conducted on the performance of the DCV systems…
View article: Assessment and Mitigation of Infection Risk Caused by a Coughing Person
Assessment and Mitigation of Infection Risk Caused by a Coughing Person Open
The recent COVID-19 pandemic has increased public awareness of the importance of clean indoor air. Many studies have been conducted on how virus-like particles propagate in indoor environments, and how their spreading could be constrained.…
View article: Temporal and spatial aerosol transmission from the exhalation of an infected person in an office environment
Temporal and spatial aerosol transmission from the exhalation of an infected person in an office environment Open
The paper reports office test chamber experiments with an exposed breathing thermal manikin (6 L/min) and an infected exhalation simulator (6 L/min) connected with a thermal dummy. The motivation was to investigate effects of different pro…
View article: The effect of local thermal sensation on overall thermal sensation in older people under warm conditions: a chamber room study
The effect of local thermal sensation on overall thermal sensation in older people under warm conditions: a chamber room study Open
Global aging and climate warming have made scholars begin to pay attention to the thermal comfort of the elderly. The deterioration of the function of body organs and systems caused by aging affects the thermoregulatory system of the elder…
View article: Exploring the potentials of micro-environment ventilation in mitigating airborne transmission risk
Exploring the potentials of micro-environment ventilation in mitigating airborne transmission risk Open
In the background of COVID-19, new requirements are occurring in the novel ventilation systems to mitigate airborne transmission risk in indoor environments. In this study, two micro-environment ventilation systems: personalized ventilatio…
View article: Experimental study on thermal environment in a simulated classroom with different air distribution methods
Experimental study on thermal environment in a simulated classroom with different air distribution methods Open
To evaluate the thermal environment in the classrooms, the physical measurements were conducted in laboratory conditions. The objective of the study is to compare the performance of four typical air distribution methods in both heating and…
View article: Effects of Night Ventilation on Indoor Air Quality in Educational Buildings—A Field Study
Effects of Night Ventilation on Indoor Air Quality in Educational Buildings—A Field Study Open
Night ventilation methods have been used in educational buildings to guarantee indoor air quality at the beginning of occupied periods. A typical method has been to pre-start ventilation 2 h before the space usage. Another selection has be…
View article: Human response to thermal environment and perceived air quality in an office with individually controlled convective and radiant cooling systems
Human response to thermal environment and perceived air quality in an office with individually controlled convective and radiant cooling systems Open
The purpose of this study is to analyze the human response to the indoor climate with two individually controlled convective and radiant cooling systems: a low velocity unit combined with radiant panel system (LVRP) and a personalized vent…
View article: Impact of different mechanical ventilation strategies for night purging on indoor air quality in public buildings
Impact of different mechanical ventilation strategies for night purging on indoor air quality in public buildings Open
Night-time ventilation has been used in non-residential buildings to enhance indoor air quality before occupied periods. However, many hypotheses exist on how this ventilation should be used. A typical choice has been to shut down the vent…
View article: Human response to thermal environment and perceived air quality in an office room with individually controlled convective and radiant cooling systems
Human response to thermal environment and perceived air quality in an office room with individually controlled convective and radiant cooling systems Open
The purpose of this study is to analyse the human response to the indoor climate with two individually controlled convective and radiant cooling systems: a low velocity unit combined with radiant panel system (LVRP) and a personalized vent…
View article: Comparison of the effects of symmetric and asymmetric heat load on indoor air quality and local thermal discomfort with diffuse ceiling ventilation
Comparison of the effects of symmetric and asymmetric heat load on indoor air quality and local thermal discomfort with diffuse ceiling ventilation Open
In this study, indoor air quality and thermal conditions were studied under laboratory conditions with the heat load that was located symmetrically or asymmetrically in the room. Diffuse ceiling ventilation (DCV) was adopted to provide coo…
View article: An experimental study of the influence of a moving person on airflow characteristics and thermal conditions with diffuse ceiling ventilation
An experimental study of the influence of a moving person on airflow characteristics and thermal conditions with diffuse ceiling ventilation Open
The influence of occupants'’ movements should be considered when analysing local thermal comfort. This study presents the effect of human movement on airflow characteristics and local thermal conditions with diffuse ceiling ventilation by …
View article: Experimental comparison of thermal conditions in office rooms: Diffuse ceiling ventilation, chilled beam system, and chilled ceiling combined with mixing ventilation
Experimental comparison of thermal conditions in office rooms: Diffuse ceiling ventilation, chilled beam system, and chilled ceiling combined with mixing ventilation Open
Thermal environments generated by diffuse ceiling ventilation (DCV), chilled beam (CB), and chilled ceiling with mixing ventilation (CCMV) systems were compared at different heat loads. Experiments were carried out in two test chambers, in…
View article: Indoor airflow interactions with symmetrical and asymmetrical heat load distributions under diffuse ceiling ventilation
Indoor airflow interactions with symmetrical and asymmetrical heat load distributions under diffuse ceiling ventilation Open
Heat load distribution and supply air jets have a major effect on indoor airflow patterns, which may cause local thermal discomfort. In this study, heat load distribution was studied at the heat load strength of 40 W/floor-m2 and 80 W/floo…
View article: A review of total volume environment and individually controlled micro-environment
A review of total volume environment and individually controlled micro-environment Open
Indoor environment has great effects on the health, comfort, and performance of occupants in modern buildings. The energy used for ventilating of buildings is substantial. However, ventilation based on total volume air distribution in spac…
View article: Airflow characteristics under planar opposed ventilation jets in a controlled indoor environment
Airflow characteristics under planar opposed ventilation jets in a controlled indoor environment Open
Healthy, comfortable and intelligent indoor environment is a key objective in comprehensive well-being. This is also a main target of advanced HVAC-technology. In indoor environments, air distribution plays a major role while providing cle…
View article: An Experimental study of diffuse ceiling ventilation with symmetrical and asymmetrical heat load distributions
An Experimental study of diffuse ceiling ventilation with symmetrical and asymmetrical heat load distributions Open
Strength and location of heat loads have a significant effect on air distribution. Symmetrical and asymmetrical heat load distributions were studied at 40 W/floor-m2 (C40) and at 80 W/floor-m2 (C80) with diffuse ceiling ventilation. Experi…
View article: Experimental comparison of three indoor thermal environment control methods: diffuse ceiling ventilation, chilled beam system and chilled ceiling combined with mixing ventilation
Experimental comparison of three indoor thermal environment control methods: diffuse ceiling ventilation, chilled beam system and chilled ceiling combined with mixing ventilation Open
Thermal environments created by diffuse ceiling ventilation (DCV), chilled beam system (CB) and chilled ceiling with mixing ventilation (CCMV) were compared at different heat loads. Experiments were carried out in two test rooms (4.1 x 4.2…
View article: An experimental study on airflow characteristics and thermal environment with asymmetrically located heat loads and low-momentum diffuse ceiling ventilation.
An experimental study on airflow characteristics and thermal environment with asymmetrically located heat loads and low-momentum diffuse ceiling ventilation. Open
Airflow characteristics were studied with asymmetrical heat load distribution and diffuse ceiling ventilation. The heat load was increased from 40 W/floor-m^2 to 80 W/floor-m^2, while the average air temperature was kept at 26±0.5°C. Exper…
View article: The effect of the strength of asymmetric heat load on indoor air quality with diffuse ceiling ventilation
The effect of the strength of asymmetric heat load on indoor air quality with diffuse ceiling ventilation Open
Indoor air quality has a significant effect on performance of building occupants. In this paper, indoor air quality was studied when the heat load was located asymmetrically with diffuse ceiling ventilation. The test chamber was furnished …
View article: Experimental investigation of air distribution and ventilation efficiency in an ice rink arena
Experimental investigation of air distribution and ventilation efficiency in an ice rink arena Open
This study presents extensive experimental measurements in a modern Finnish ice rink arena including temperature, relative humidity, carbon dioxide, air speed, air flow and pressure difference measurements in addition to smoke tests. Furth…