The use of moments for assessing air quality in ventilated rooms

Sandberg, Mats; Sjöberg, Mats

doi:10.1016/0360-1323(83)90026-4

Cited by 276 publications

(145 citation statements)

References 8 publications

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“…(1998), people spend more than 80% of their life time in inside areas. Indoor air quality has a significant role in human comfort, health and safety (Sandberg (1983)). It is essential to make clear, the principle of non-uniform distribution of indoor contaminant and know how to utilize the non-uniform principle to create various indoor parameters so that better design and control on the HVAC system can be obtained (Cai (2008)).…”

Section: Literature Reviewmentioning

confidence: 99%

Trajectory of Contaminated Particle in Intensive Care Unit of Hospitals Using Numerical Modeling

A¹,

A²

2015

Int. Jour. Des. Manf. Tech.

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Primary objective of air-conditioning is to create an indoor air quality and thermal condition of comfort suitable for persons / patients, with minimum energy cost. In air-conditioning system, ventilation airflow rate is the amount of fresh outdoor air introduced into the room to dilute CO2, contaminants and odours etc. Numerical model solves mass, momentum and energy equations. The contaminated particle (infection) which is simulated with a Lagrangian particle tracking model and the same has been carried out by simulation. This is usually a small part of the supply airflow rate which is introduced and distributed into the room at proper flow rate, velocity, temperature and relative humidity so as to remove the thermal loads and obtain conditions of thermal comfort. This is filtered to remove contaminants, mixed with ventilation air and conditioned by cooling / heating and humidifying / dehumidifying before introduction into the room. The study concerns about the health risk of the airborne diseases (bacteria, fungus, viruses etc.) from the patient to the other people in the ICU of hospital. By observing the movement of contaminated particle, it is advisable to keep the nurse-station and health care staff near the inlet to keep them healthy.

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Section: Literature Reviewmentioning

confidence: 99%

Trajectory of Contaminated Particle in Intensive Care Unit of Hospitals Using Numerical Modeling

A¹,

A²

2015

Int. Jour. Des. Manf. Tech.

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“…This method is based on the ideas of "age-of-air" 6) and "SVE" 7) , both of which are used to measure building ventilation. "Age-of-air" is defined as the elapsed time passed after a unit of air is supplied to an arbitrary position.…”

Section: Age-of-air and Svementioning

confidence: 99%

Optimal Airflow Performance for FOUP Systems in Cleanrooms Using SVE Quantification Method

Suwa

Park

Kim

2011

Journal of Asian Architecture and Building Engineering

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This research examined the possibility of optimizing airflow performance of cleanrooms with FOUP (Front Opening Unified Pod) systems used in 300mm wafer lines for VLSI production. Numerical simulations using computational fluid dynamics (CFD) were carried out to obtain airflow states in cleanrooms with various design conditions. Each result was evaluated using a new quantification method and the cleanroom performance was then compared to it. The proposed method was based on the idea of Scale for Ventilation Efficiency (SVE), which is used to measure building ventilation. It enabled quantitative evaluation of the airflow performance independent from other factors and could be used to help design optimal cleanrooms. The study found that cleanroom performance changes with varying supply types and filter coverage, and that there is a proper combination of these parameters. Therefore, it is possible to develop the most efficient FOUP cleanroom system using this method.

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“…This led to inaccurate results. There are different indices such as the age theory (Sandberg, 1983), purging flow rate, visitation frequency (Kato et al, 2003) and the six indices SVE1-6 (Kato et al, 1992) that are used to assess the air quality of a room or a domain located within an enclosed environment. Among these indices, three indices were adopted to implement the present study, i.e.…”

Section: Ventilation Efficiency Indicesmentioning

confidence: 99%

Modeling of Ventilation Efficiency

Bady¹

2010

Air Quality

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The use of moments for assessing air quality in ventilated rooms

Cited by 276 publications

References 8 publications

Trajectory of Contaminated Particle in Intensive Care Unit of Hospitals Using Numerical Modeling

Trajectory of Contaminated Particle in Intensive Care Unit of Hospitals Using Numerical Modeling

Optimal Airflow Performance for FOUP Systems in Cleanrooms Using SVE Quantification Method

Modeling of Ventilation Efficiency

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