نتایج جستجو برای: ventilation system

تعداد نتایج: 2271159  

ژورنال: مهندسی بهداشت حرفه ای 2019
bahrami, abdorahman, ghorbani shahna, farshid, samadi, Hamidreza,

Abstract Introduction: The diffusion of pollutants Methyl Mercaptan, Hydrogen Sulfide, Dimethyl sulfide and Dimethyl disulfide from dryer machines of pulp industries will cause to smell annoyance and health effects on the employees and neighbors . This study aimed to determine the effectiveness of local ventilation system and packed bed scrubber implemented for controlling the emitted hydrogen...

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Journal: :Shigen-to-Sozai 2003

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Journal: Journal of Mining and Environment 2018
F. Sereshki, F. Sotoudeh, S. Maleki,

Ventilation is a vital component of an underground mining operation, used to guarantee a safe atmosphere for workers and survive them from the hazardous and toxic gases. In the recent years, engineers have begun to apply new operation research techniques in order to optimize the ventilation systems to assist in achieving a regulatory compliance, reduce ventilation costs, and improve its efficie...

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ژورنال: سلامت کار ایران 2017
بابائی, مرتضی, بهرامی, عبدالرحمن, قربانی شهنا, فرشید,

Background and aims: Dust emission is one of the main health and environmental problems during the crushing, screening and conveying process in mining company. The goal of this study was designing, implementation and evaluation of industrial ventilation and combination with a water spray for control the airborne particles as well as economic analysis on crushing unit of a mining compa...

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Journal: International Journal of Engineering 2000
Mohammad Saidi Mehrabad,

The techniques and methods of developing cost models for respirators are discussed. Models are developed and implemented in this study for nineteen types of respirators in two major classes (air-purifying and supplied-air) and one LEV system. One respirator model is selected for detailed discussion from among the twenty models. The technical cost method is used in constructing the cost models f...

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Journal: :iranian journal of public health 0
mohd hanif mohd zin sharifah norkhadijah syed ismail karmegam karuppiah

background:: this study developed a smart co 2 detector, which attach to the general ventilation system to reduce the gas level. methods: indoor air quality measurement was performed in five selected rooms between january 2015 to february 2015 using tsi q-trak tm indoor air monitor 7575. the perceived indoor air quality conditions was gathered using questionnaires adopted from the industrial co...

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Journal: :international journal of occupational hygiene 0
mahmoud mohammadyan health sciences research center, faculty of health, mazandaran university of medical sciences, sari, iran. yaser baharfar department of environment and energy, science and research branch, islamic azad university, tehran, iran.

this study was carried out to evaluate tobacco dust concentration and also designing a suitable ventilation system for reduction of tobacco dust concentration in a tobacco processing factory in the north of iran.gravimetric method was used to determine the tobacco dust concentrations in the emission sources an also indoor workplace. a local exhaust ventilation system was designed according to t...

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Journal: Journal of Applied and Computational Mechanics 2017
Hamid Reza Eidi, Javad Mokhtari, Kamal Hadad,

Using Computational Fluid Dynamics (CFD) technique, the dispersion contours and the exposure rate of Flexographic printing workers to VOCs in a printing department is evaluated. Firstly, VOCs distribution is determined in the printing room due to the existing ventilation system. Through next steps, 4 scenarios for lowering VOCs concentration and its exposure rate to workers are analyzed. Concen...

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Journal: :Shigen-to-Sozai 1992

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Journal: :journal of cardio-thoracic medicine 0
maziar mahjoubifard anesthesiologist, department of anesthesiology, zahedan university of medical sciences, zahedan, iran alireza jahangiri fard fellowship of cardiac anesthesia, tracheal diseases research center, national research institute of tuberculosis and lung diseases (nritld) ,shahid beheshti university of medical science, tehran, iran majid golestani eraghi fellowship of intensive care, department of anesthesiology, masih daneshvari hospital, shahid beheshti university of medical science, tehran, iran shahram amini anesthesiologist, department of anesthesiology, mashhad university of medical sciences, mashhad, iran seyed mohammadreza hashemian fellowship of intensive care, national research institute of tuberculosis and lung diseases (nritld), masih daneshvari hospital, shahid beheshti university of medical sciences, tehran, iran. behrooz farzanegan fellowship of intensive care, national research institute of tuberculosis and lung diseases (nritld), masih daneshvari hospital, shahid beheshti university of medical sciences, tehran, iran.

introduction: tuberculosis (tb), with different types of respiratory tract involvements, has a high rate of mortality all around the world. endobronchial involvement, which is a slightly common tuberculous infection, requires special attention due to its severe complications such as bronchostenosis. aim of study of this study was describes, one type of pulmonary tuberculosis with less diagnosed...

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