OPTIMIZING THE CHOICE OF VENTILATING AIR CLEANING EQUIPMENT IN SYSTEMS OF LOCAL EXHAUST VENTILATION

2017 ◽  
Vol 7 (3) ◽  
pp. 19-23
Author(s):  
Svetlana M. PURING ◽  
Denis N. VATUZOV ◽  
Gennady I. TITOV
Keyword(s):  
Indoor Air ◽  
Desirability Function ◽  
Ventilation System ◽  
Aerodynamic Resistance ◽  
Multicriteria Analysis ◽  
Local Exhaust Ventilation ◽  
Air Cleaning ◽  
Exhaust Ventilation ◽  
Industrial Buildings ◽  
Cleaning Equipment

Functioning of industrial buildings is impossible without correctly organized ventilation system. Its work both regulates heat moist mode and the required indoor air purity that is cleaned with the help of air cleaning equipment. To make decision to construct the required air cleaning equipment at the enterprise it is worthwhile to give additional parameters and to solve a problem of multicriteria optimization to get the best results. The choice of the best variant is supposed to be carried out using Harrington’s desirability function. The conducted multicriteria analysis allowed to reveal optimum characteristics of air cleaning equipment, based on the required purifi cation air degree, the geometrical sizes of the equipment and aerodynamic resistance while introducing any particular device.

Experimental and Simulation Validation Methods of Local Exhaust Ventilation (LEV) in Training Facilities Building

2013 ◽  
Vol 315 ◽  
pp. 997-1001 ◽  
Author(s):  
Ng Chee Seng ◽  
Abdul Mutalib Leman ◽  
Azmahani Sadikin
Keyword(s):  
Indoor Air ◽  
Ventilation System ◽  
Percentage Error ◽  
Local Exhaust Ventilation ◽  
Geometry Model ◽  
Exhaust Ventilation ◽  
Simulation Validation ◽  
Air Ventilation ◽  
Computational Fluid Dynamics Cfd ◽  
Real Flow

LEV is a ventilation system that collects and sucks out particles such as dusts, mists, gases, vapors or fumes out of work station, so that they can’t be breathed in by occupants. There is a lot of LEV allocated and installed in order to help protecting occupants’ health but it doesn’t work properly. To overcome this issue, computational fluid dynamics (CFD) will be implemented. Past studies CFD techniques represent a very significant improvement of air ventilation systems. However, CFD is just a tool in prediction model, which can lead to inaccuracy of predicting airflow due to problems with pre-processing, solver and post-processing with parameter from actual experimental results. As of yet, it is not possible to 100% accurately simulate airflow around a body. These codes are simply models which are close to that of a real flow, but not an exact match. All of these require validation to help minimizing percentage error in CFD methodology. Several strategies are needed to boost effectiveness of LEV in terms of predicting airflow in a geometry model. The outcome of this research can be used as a benchmark or guideline for industries to help improving indoor air quality (IAQ).

METHOD OF SELECTION AND CALCULATION DEVICES AIR CLEANING FROM CONDENSED AEROSOLS

2016 ◽  
Vol 6 (2) ◽  
pp. 14-18
Author(s):  
Denis N. VATUZOV ◽  
Svetlana M. PURING
Keyword(s):  
Energy Efficiency ◽  
Ventilation System ◽  
Design Parameters ◽  
Local Exhaust Ventilation ◽  
Improve Energy Efficiency ◽  
Air Cleaning ◽  
Exhaust Ventilation ◽  
Recovery System ◽  
Degree Of Purification ◽  
Ventilation Management

This article defines the options to improve the efficiency of local exhaust ventilation systems by incorporating into the circuit from the air cleaning devices droplet aerosol. Schemes connecting cleaning apparatus in ventilation management system are worked out. In the first embodiment, the placement aerozoleulovitelya purified ventilation air is discharged directly to the atmosphere, in the second embodiment, the cleaned air is used in the recovery system, which is removed after the street. The feasibility of using the heat exchanger in the scheme is justified by comparing the technical and economic options and the need to improve energy efficiency. The method of selection and calculation of air cleaning devices from droplet sprays, on the basis of which it is possible to determine the design parameters of the system, to evaluate the amount of captured material, and choose the most appropriate in each case unit, focusing on the desired performance of the ventilation system, the necessary degree of purification and the area for mounting the device.

scholarly journals Bed-integrated local exhaust ventilation system combined with local air cleaning for improved IAQ in hospital patient rooms

2016 ◽  
Vol 100 ◽  
pp. 10-18 ◽  
Author(s):  
Mariya P. Bivolarova ◽  
Arsen K. Melikov ◽  
Chiyomi Mizutani ◽  
Kanji Kajiwara ◽  
Zhecho D. Bolashikov
Keyword(s):  
Ventilation System ◽  
Hospital Patient ◽  
Local Exhaust Ventilation ◽  
Air Cleaning ◽  
Exhaust Ventilation

scholarly journals CFD simulation of local exhaust ventilation for aviation fire-test lab

2018 ◽  
Vol 7 (4.13) ◽  
pp. 188-194
Author(s):  
Aiman S H Al-Ammari ◽  
Yazan S M Altarazi ◽  
Abd. Rahim Abu Talib ◽  
M Nadiir Bheekhun
Keyword(s):  
Air Quality ◽  
Indoor Air Quality ◽  
Indoor Air ◽  
Fire Test ◽  
Cfd Simulation ◽  
Ventilation System ◽  
Local Exhaust Ventilation ◽  
Exhaust Ventilation ◽  
Air Contaminant ◽  
Cfd Method

Excellent indoor air quality in an enclosed area has always become a major safety aspect in designing a building. Issues with regards to circulation of air and exhaust system must be first resolved before the said building can be used for any purposes. The goal of this study is to identify ways to improve air quality in the aviation fire test room at the Propulsion Laboratory that is located in Universiti Putra Malaysia (UPM), Selangor, Malaysia. A computational fluid dynamics (CFD) method was employed to predict the air contaminant inside the lab. When performing the activities, the indoor air quality have to be ensure circulated and ventilated in the lab. Using a mechanical fans and natural ventilation are a traditional method to provide indoor air quality into the propulsion. Whereby, this method may not be enough to provide the required indoor air quality for specific aviation fire-test setup. Such labs may suffer from increasing air contaminant based on the improper and irregular air distribution. A grid independent test (GIT) was done to reduce the effects of meshing on the results was carried out to estimate the discretization error. Computational fluid dynamic (CFD) method was carried out to identify a suitable ventilation system that would result in the greatest improvement in the indoor air quality (IAQ) inside the lab. The results of using the CFD simulation show that installing Local Exhaust Ventilation (LEV) at the lab could significantly improve the IAQ inside the lab. The airflow increase by 84% and the CO, CO2 and NO reduce by 84%, 89 and 81%, respectively. Improvement of the IAQ by increasing the airflow and reducing in the air CO, CO2, and NO, which can be considered as very significant achievement.    

Air Flow Straighteners’ Application to Reduce the Power Consumption of Exhaust Ventilation Schemes

2018 ◽  
Vol 875 ◽  
pp. 137-140 ◽  
Author(s):  
Valery N. Azarov ◽  
Natalia M. Sergina ◽  
I.V. Stefanenko
Keyword(s):  
Power Consumption ◽  
Air Flow ◽  
Ventilation System ◽  
Aerodynamic Resistance ◽  
Experimental Studies ◽  
Swirling Flows ◽  
Dust Collector ◽  
Exhaust Ventilation ◽  
Outlet Pipe ◽  
Ventilation Systems

It was proposed to use air flow screw straightened units in outlet pipe of the dust collectors to reduce the aerodynamic resistance of exhaust ventilation systems. It is allowed to decrease power consumption for their maintenance operation consequently. The article describes the results of experimental studies to evaluate its effectiveness by applying the tangential screw straightened unit within ventilation system. The obtained results showed that the use of this device allows reducing the aerodynamic resistance of the cyclone by 14.6%, and for counter-swirling flows’ dust collector (CSFC) by 17.2-23.6%. It was found that meanings of the aerodynamic resistance depend on value the share proportion of the flow entering into lower CSFC apparatus’ input.

Performance of Different Front-Opening Unified Pod (FOUP) Moisture Removal Techniques With Local Exhaust Ventilation System

2020 ◽  
Vol 33 (2) ◽  
pp. 310-315 ◽  
Author(s):  
Tee Lin ◽  
Omid Ali Zargar ◽  
Oscar Juina ◽  
Tzu-Chieh Lee ◽  
Dexter Lyndon Sabusap ◽  
...  
Keyword(s):  
Ventilation System ◽  
Moisture Removal ◽  
Local Exhaust Ventilation ◽  
Exhaust Ventilation

scholarly journals Influence of the scheme of air exchange organization in the room on the efficiency of the air-jet hood of the heat treatment chamber

2020 ◽  
Vol 224 ◽  
pp. 03026
Author(s):  
Tatyana Zhilkina ◽  
Viktor Pukhkal ◽  
Vladislav Pankov
Keyword(s):  
Heat Treatment ◽  
Software Package ◽  
Computational Experiment ◽  
Ventilation System ◽  
Exhaust Hood ◽  
Local Exhaust Ventilation ◽  
Exhaust Ventilation ◽  
Air Jet ◽  
Calculation Results ◽  
Air Exchange

Local exhaust ventilation allows maximizing the localization of hazards with minimum values of air exchange in the room. For the study, the design of a local exhaust in the form of an air-jet hood at an open doorway of the UKM Classic M 2005 chamber by Mauting was adopted. Geometric models have been developed, including a heat treatment chamber, a room from which the chamber is loaded, a supply and exhaust hood over the door from the chamber to the room, and a supply air duct with air distributing devices. The results of a computational experiment on modeling the operation of the local exhaust ventilation system of the heat treatment chamber are presented. The STAR-CCM+ software package was used as a calculation program. The calculation results were analyzed. The influence of the air exchange scheme (location of the supply devices) in the room on the efficiency of the local exhaust devices (supply and exhaust hood) has been established.

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