Reduced-scale experimental investigation on ventilation performance of a local exhaust hood in an industrial plant

Huang, Yanqiu; Wang, Yi; Liu, Li; Nielsen, Peter; Jensen, Rasmus Lund; Yan, Fanliao

doi:10.1016/j.buildenv.2014.11.038

Cited by 76 publications

(17 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The air exhaust ventilation system with one central fan and multiple terminals has been widely used for heat and contaminant removal in various types of buildings, i.e., heat extraction for train braking in subway station [1], exhaust ventilation in Chinese restaurant with multiple dining rooms, pollutant removal in an industrial workshop with multiple sources [2,3] and so on.…”

Section: Introductionmentioning

confidence: 99%

A novel flow-guide device for uniform exhaust in a central air exhaust ventilation system

Tong

Gao

Luo

et al. 2019

Building and Environment

View full text Add to dashboard Cite

Exhaust ventilation system with one central fan and multiple terminals has been widely used for the heat and contaminant removal in building environment. Conventional design without pressure balancing leads to uneven distribution of exhaust airflow rate among the multiple outlets. Existed balancing methods usually uses dampers (constant-air-volume valve or regulating valve), tapered duct, or varied inlet area. However, these methods result in higher fan energy consumption, or complicated construction and on-site commissioning. In this paper, a flow-guide device was developed for adjusting the pressure distribution of duct branches. This new device is integrated with the interflow Tee-junction and does not need any commissioning or regulating. The resistance performance of the device responding to the structural parameter was derived using the CFD simulation and experiment. The negative direct resistance featured by the device was found to effectively benefit exhaust at the outlets farther away from the central fan. The ductwork hydraulic model based on the Bernoulli's law of airflow and the fitted resistance correlations were further proposed to fulfill the parametric design. Finally, full-scale test was carried out for a central exhaust system installed with the flow-guide devices referring to a factory workshop with 30 heat and contaminant sources. Compared to the system without the devices, the total rate of the system increased by 25%. Discrepancy of exhaust rate decreased by 78% and uneven degree decreased by 82%, which well meets the engineering balancing requirement. Meanwhile, total resistance of the system reduced 23.8% owing to the negative loss the devices bring.

show abstract

Section: Introductionmentioning

confidence: 99%

A novel flow-guide device for uniform exhaust in a central air exhaust ventilation system

Tong

Gao

Luo

et al. 2019

Building and Environment

View full text Add to dashboard Cite

show abstract

“…М естные отсосы являются надежными и эффективными устройствами для улавливания и локализации пылегазовых выбросов. Работа систем местной вытяжной вентиляции сопряжена с высокими энергетическими затратами, из-за чего данные системы и технологии производства непрерывно совершенствуют [1][2][3][4][5]. Одним из способов повышения диапазона захвата вредностей местными отсосами открытого типа является использование искусственно созданного вихря (торнадо).…”

Section: Introductionunclassified

The investigation of the dust-air flow close to the vertical rotating cylinder local exhaust

Gol’tsov¹,

Logachev²,

Аверкова³

et al. 2018

Nov. ogneup.

View full text Add to dashboard Cite

The search for solution was made in the article to raise the efficiency of the open-type local exhaust and to decrease the dust losses by the closed-type local exhaust-hood into the aspiration system at the expense of the vertical rotating exhaust cylinder. The exhaust is regarded in the form of the slit-type gaps parallel to the z-axes with the drain from the end of the cylinder. The improvements are proposed for the rotating cylinder to increase the air flow entrainment efficiency. The results obtained can be useful when designing of the dust-collecting chambers-capable aspiration hoods.

show abstract

“…Lastly, cooking can be a significant source of water vapor, and the water vapor produced from cooking can eventually lead to moisture-related problems (Parrott and Emmel 2003) The main mechanism by which the source of these airborne pollutants is reduced is via kitchen range hoods. Many studies have looked at the ability of these hoods to reduce concentrations of pollutants generated during cooking, and it is generally believed that they are indeed effective (Chiang et al 2000;Fugler 1989; J. M. Huang et al 2004;Y. Huang et al 2015;Mullen et al 2016;Revzan 1986;D.…”

Section: Introductionmentioning

confidence: 99%

Towards the development of a standardized testing protocol for overhead island kitchen exhaust devices: Procedures, measurements and paths forward

Clark

Rojas

Walker

2018

Building and Environment

View full text Add to dashboard Cite

Reduced-scale experimental investigation on ventilation performance of a local exhaust hood in an industrial plant

Cited by 76 publications

References 18 publications

A novel flow-guide device for uniform exhaust in a central air exhaust ventilation system

A novel flow-guide device for uniform exhaust in a central air exhaust ventilation system

The investigation of the dust-air flow close to the vertical rotating cylinder local exhaust

Towards the development of a standardized testing protocol for overhead island kitchen exhaust devices: Procedures, measurements and paths forward

Contact Info

Product

Resources

About