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

Suwa, Yoshihide; Park, Jin Chul; Kim, Yong Shik

doi:10.3130/jaabe.10.257

Cited by 3 publications

(2 citation statements)

References 1 publication

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“…Scale of ventilation efficiency (SVE), the set of indices (1 ~ 6) introduced by Murakami and Kato (1992), was considered as well 46 . SVE indices, especially SVE3 and SVE6 have been used in multiple studies to assess ventilation systems, 47‐49 or as a performance evaluation method base 50 . Nevertheless, SVE2 has also been used to estimate the contaminant diffusion radius 51 although not as widely.…”

Section: Resultsmentioning

confidence: 99%

“…46 SVE indices, especially SVE3 and SVE6 have been used in multiple studies to assess ventilation systems, [47][48][49] or as a performance evaluation method base. 50 Nevertheless, SVE2 has also been used to estimate the contaminant diffusion radius 51 although not as widely. SVE2 was calculated as per equations (4~6).…”

Section: Numerical Indices (Local Air Quality Index and Contaminants ...mentioning

confidence: 99%

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Effect of source location on contaminant dispersion pattern and occupants inhaled air quality in lecture room under displacement ventilation

Essa

Yamanaka

Kobayashi

et al. 2022

Japan Architectural Review

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Displacement ventilation (DV) is considered an energy saving air conditioning system and is especially recommended for classrooms for providing cool clean air in the occupied zone. However, in the current pandemic situation, ventilation systems should be assessed in terms of infection‐spread prevention as well. Hence, this study aims at assessing the efficiency of displacement ventilation in minimizing infection spread in lecture halls through investigating the effect of source position on the contaminant concentration distribution. The settings of a mid‐size DV lecture hall in Osaka University, Japan was chosen as a case‐study. Ten single‐contaminant‐source cases were simulated using CFD software. The cases were analyzed in terms of temperature distribution, contaminant diffusion pattern and vertical distribution, and breathing air quality using indices, such as local air quality index and scale of ventilation efficiency. The results demonstrated a considerable variation between cases in terms of contaminant distribution pattern, number of occupants affected, average inhaled‐air quality, and diffusion radius. Accordingly, given the ventilation system design, best and worst case‐scenarios were pointed out and factors affecting the variation were highlighted and further investigated to conclude the impact of each factor.

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Section: Resultsmentioning

confidence: 99%

Section: Numerical Indices (Local Air Quality Index and Contaminants ...mentioning

confidence: 99%

Effect of source location on contaminant dispersion pattern and occupants inhaled air quality in lecture room under displacement ventilation

Essa

Yamanaka

Kobayashi

et al. 2022

Japan Architectural Review

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A Study on the Application of Small Wind Power System with Combined Ventilator in Super High-Rise Apartment

Park

Kim

et al. 2013

Journal of Asian Architecture and Building Engineering

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This is an elementary study on the application of small-sized exhaust wind power generation to exhausters on the rooftop of high-rise apartment buildings, Here, CFD (Computational Fluid Dynamics) simulation is performed to determine the effect of multi-diffusers for exhaust wind velocity amplification and external wind attraction; the experiments are conducted using miniatures and actual mock-ups. The results of the study are summarized as follows. From the simulation of multi-diffusers for exhaust and ventilation, the wind velocity increased with a greater number of installations of devices, where up to eight was possible and about six was found to be appropriate. In simulation of exhaust effect, an increase in the external wind velocity leads augmentation in the exhauster wind velocity; in particular, it was confirmed that even when there was no exhaust wind (0m/s), there was an exhaust air rise effect due to inflow of the external wind, itself. In the results of experiments with miniatures and mock-ups, the exhauster discharge wind velocity increased due to the external air inflow in the apartment building exhauster, confirming the existence of an exhaust effect. The wind velocity increase rate was greater at the upper part than at the lower part, leading to the prediction that it would be possible to secure over 3m/s, the initial operation wind velocity of small wind power.Keywords: super high-rise apartment; small wind power system; combined ventilator (out air + shift on duct air) Introduction 1.1 Study background and objectiveRecently, due to global greenhouse gas reduction policies, energy savings in buildings have been increasingly emphasized. Currently, Apartment houses represent more than 50% of residential buildings in Korea. Due to the over-densification of cities and reduction of land areas, the construction of highrise apartment houses is rapidly increasing. High-rise buildings, however, have the shortfall of large energy consumption due to their structure. And particularly a lack of ventilation compared to low-rise buildings. In recent studies, small-sized wind power generation has been applied for energy savings in high-rise buildings (Hyun-Do Chun, Dong-Yun Lee et al.). On the other hand, in urban areas, it is difficult to stably secure a wind environment of 3 m/s, the initial operation power of wind power generation for high-rise buildings.It has been demonstrated that an exhaust duct wind of 0.5 m/s ~ 1.5 m/s can be secured in high-rise

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An Experiment and CFD Simulation for the Application of a Wind Power System Combined with Exhaust in Super High-Rise Apartment Buildings

Park

et al. 2014

Journal of Asian Architecture and Building Engineering

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The aim of this study was to test the application of a wind power system combined with exhaust to a highrise apartment building. The research results can be summarized as follows ; 1) The proposed location of the wind power system was a roof-top exhaust pipe from a dining room and bathroom of a super high-rise apartment. The size of the module for concentrating wind was 500mm in diameter and 320mm in height (the upper diameter was 400mm with Venturi effect inducement). The blade was a combination of a Savonius type and a Darrieus type, and was able to rotate. 2) Simulation results show that when the outdoor wind velocity was 3m/s, the wind velocity discharged from the exhaust pipe of the system, combined with the exhaust appeared to increase compared to the wind velocity discharged from the general exhaust pipe (0.46 m/s). In particular, when the outdoor wind velocity increased (5 m/s), the wind velocity discharged from exhaust pipe increased more (0.77 m/s), and so the proposed system was found to have a wind velocity amplification effect. 3) As for the results of measuring the generation quantity for 13 days by installing the proposed system on an apartment building rooftop 35 m tall, the Case 3 system (outside air + exhaust wind + wind concentrating device) proposed in the study appeared to have a higher generation quantity than other systems. Specifically, even when there was a low outside wind velocity value, the electrical energy appeared to be high, confirming the exhaust wind concentration effect. Therefore, the wind power system proposed in this study was found to be effective in terms of increasing driving wind velocity, thus resolving the disadvantage of compact wind power generation systems. This study confirms the viability of applying small wind power generation systems to high-rise apartment buildings, which will contribute to reducing greenhouse gas emissions.

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

Cited by 3 publications

References 1 publication

Effect of source location on contaminant dispersion pattern and occupants inhaled air quality in lecture room under displacement ventilation

Effect of source location on contaminant dispersion pattern and occupants inhaled air quality in lecture room under displacement ventilation

A Study on the Application of Small Wind Power System with Combined Ventilator in Super High-Rise Apartment

An Experiment and CFD Simulation for the Application of a Wind Power System Combined with Exhaust in Super High-Rise Apartment Buildings

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