Airflow characteristics and thermal comfort of air diffusers

Name: Airflow characteristics and thermal comfort of air diffusers
Author: Eraslan, Tolga Arda, Keskin, Cem, Mengüç, Mustafa Pınar

İsim	Airflow characteristics and thermal comfort of air diffusers
Yazar	Eraslan, Tolga Arda, Keskin, Cem, Mengüç, Mustafa Pınar
Basım Tarihi:	2023
Basım Yeri	- ASME
Konu	Air diffusers, Computational fluid dynamics (CFD), Energy efficiency, Indoor air quality, Thermal comfort
Tür	Belge
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	978-079188718-9
Kayıt Numarası	a53469a5-d86f-4756-9fc6-f324c3f0b8ec
Lokasyon	Mechanical Engineering
Tarih	2023
Notlar	Center for Energy, Environment and Economy
Örnek Metin	Indoor environment quality control is very important for building operations as occupant of buildings spend up to 90% of their time indoors. After Covid-19 pandemic break out, indoor environment quality has become even more crucial to the society because of health concerns. Indoor Environmental Quality (IEQ) covers conditions such as air quality, lighting, thermal conditions, ergonomics inside a building and their effects on the occupant or occupants of the building. Thermal conditions and air quality are usually achieved with the mechanical or natural ventilation systems or by HVAC equipment. As buildings became more complex structures, different airflow distribution systems to be developed to fulfill such requirements. For this purpose, not only the airflow distribution systems need to be modified but also diffusers that provide which supplies/draws air to/from systems are to be improved. Detailed analysis of these subcomponents is needed to assure that such devices provide high levels of comfort effectiveness and energy efficiency. The objective of this study is to develop a comprehensive analysis for air characterization and indoor air regime of different diffusers (square diffuser, operable flap diffuser) and their effect on comfort level of occupants Fanger’s model of thermal comfort is used with CFD simulations and a tool is considered for the validation experiments. Using more than 16 thermal sensors including one on a mannequin head, on a table and at foot level, the readings were correlated by using anemometers to measure air flow at supply diffuser and at different operating levels. CFD simulations were according to different scenarios which are to provide a comparison between diffusers and understand indoor airflow regimes. The results considering the flow interaction between diffusers and surroundings showed a detailed visual illustration in CFD simulations and their relation to perceived comfort levels.
DOI	10.1115/es2023-107024

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Airflow characteristics and thermal comfort of air diffusers

Yazar Eraslan, Tolga Arda, Keskin, Cem, Mengüç, Mustafa Pınar

Basım Tarihi 2023

Basım Yeri - ASME

Konu Air diffusers, Computational fluid dynamics (CFD), Energy efficiency, Indoor air quality, Thermal comfort

Tür Belge

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 978-079188718-9

Kayıt Numarası a53469a5-d86f-4756-9fc6-f324c3f0b8ec

Lokasyon Mechanical Engineering

Tarih 2023

Notlar Center for Energy, Environment and Economy

Örnek Metin Indoor environment quality control is very important for building operations as occupant of buildings spend up to 90% of their time indoors. After Covid-19 pandemic break out, indoor environment quality has become even more crucial to the society because of health concerns. Indoor Environmental Quality (IEQ) covers conditions such as air quality, lighting, thermal conditions, ergonomics inside a building and their effects on the occupant or occupants of the building. Thermal conditions and air quality are usually achieved with the mechanical or natural ventilation systems or by HVAC equipment. As buildings became more complex structures, different airflow distribution systems to be developed to fulfill such requirements. For this purpose, not only the airflow distribution systems need to be modified but also diffusers that provide which supplies/draws air to/from systems are to be improved. Detailed analysis of these subcomponents is needed to assure that such devices provide high levels of comfort effectiveness and energy efficiency. The objective of this study is to develop a comprehensive analysis for air characterization and indoor air regime of different diffusers (square diffuser, operable flap diffuser) and their effect on comfort level of occupants Fanger’s model of thermal comfort is used with CFD simulations and a tool is considered for the validation experiments. Using more than 16 thermal sensors including one on a mannequin head, on a table and at foot level, the readings were correlated by using anemometers to measure air flow at supply diffuser and at different operating levels. CFD simulations were according to different scenarios which are to provide a comparison between diffusers and understand indoor airflow regimes. The results considering the flow interaction between diffusers and surroundings showed a detailed visual illustration in CFD simulations and their relation to perceived comfort levels.

DOI 10.1115/es2023-107024