ventilation system Articles

  • A new exhaust ventilation system design software

    By industries development, the amount of air contaminants that are released in workplace has grown increasingly. To reduce these contaminants, there are several methods that, one of which is control at source. Industrial ventilation is perhaps the most powerful tool available for environmental professionals to control workplace pollution. Exhaust ventilation can capture contaminants at source, ...


    By University of Tehran

  • Effects of Headroom on the Performance of the Displacement Ventilation System

    IntroductionIn recent years an increasing amount of health evidence from building occupants has confirmed the existence of sick building syndrome (SBS). This is where occupants within a building begin to report feelings of nausea, headaches and general feelings of illness. Additional symptoms of this health problem include eye, nose and throat irritation, coughing and fatigue. The fact that most ...


    By SAGE Publications

  • Ventilation/filtration system is main heat source

    The challenge K.S. Smede og Montage, a smith’s working-place, was about to expand their business and move to new premises. As they were expanding, K.S. Smede og Montage took this opportunity to purchase a new ventilation/filtration system to extract welding fumes and grinding dust more effective. One of the ...


    By Plymovent Group BV

  • Confused about Carbon Monoxide and Ventilation?

    There has been a lot of press regarding Carbon Monoxide Detectors (CO) and Smoke Detectors in the news over the past year. In most cases, this is justified and certainly the attention and awareness is important. As a contractor though, how does this affect you and the HVAC market place? It’s important to understand the difference between private residential monitoring for personal safety ...


    By Arjay Engineering Ltd.

  • Confused about Carbon Monoxide and Ventilation?

    How does it affect you, the Building Owner and HVAC Contractor? There has been a lot of press regarding Carbon Monoxide Detectors (CO) and Smoke Detectors in the news over the past year. In most cases, this is justified and certainly the attention and awareness is important. As a contractor though, how does this affect you and the HVAC market place? It’s important to understand the ...


    By Arjay Engineering Ltd.

  • Two approaches to effective ventilation system design for the biomedical device and pharmaceutical industries

    This paper provides two alternative solutions to the difficult task of providing adequate ventilation to operations found in the biomedical device and pharmaceutical manufacturing industries. The first approach involves a two-tier strategy that includes an isolation chamber and an appropriately designed local exhaust hood. The second approach involves the design of modular, walk-in hood. ...


    By Inderscience Publishers

  • A dynamic ventilation model for gravity sewer networks

    To implement any effective odour and corrosion control technology in the sewer network, it is imperative that the airflow through gravity sewer airspaces be quantified. This paper presents a full dynamic airflow model for gravity sewer systems. The model, which is developed using the finite element method, is a compressible air transport model. The model has been applied to the North Head ...


    By IWA Publishing

  • Gas Monitoring for Ventilation Control and Energy Management

    The growing demand for underground and enclosed parking and maintenance garages (resulting from limitations on land availability) has increased the awareness and need for proper ventilation and control systems. In addition, increased health and safety programs have only added to the concerns of toxic and combustible gases in confined or enclosed spaces. Historically, ventilation and make-up air ...


    By Arjay Engineering Ltd.

  • Methane emissions and airflow patterns along longwall faces and through bleeder ventilation systems

    The National Institute for Occupational Safety and Health (NIOSH) conducted an investigation of longwall face and bleeder ventilation systems using tracer gas experiments and computer network ventilation. The condition of gateroad entries, along with the caved materials permeability and porosity changes as the longwall face advances, determine the resistance of the airflow pathways within the ...


    By Inderscience Publishers

  • Use of CFD Modelling to Optimise the Design of Upper-room UVGI Disinfection Systems for Ventilated Rooms

    AbstractThe installation of upper-room ultraviolet germicidal irradiation (UVGI) devices in ventilated rooms has the potential to reduce transmission of infections by an airborne route. However, the performance of such devices is dependant on several factors including the location of the lamp and the ventilation airflow in the room. This study uses a CFD model to evaluate the performance of UVGI ...


    By SAGE Publications

  • Odor control ventilation system, from corrosion composites, used in Owatonna waste water plant

    Application Spotlight Location: Owatonna Waste Water Plant, Minnesota Midwest Mechanical Solutions - Monoxivent Sales Representative Summary: Owatonna is a city in southern Minnesota with a population of approximately 25,000 located about an hour south of Minneapolis. Legend has it that Princess Owatonna, the sickly daughter of Chief Wabena of the Dakota ...


    By Monoxivent

  • The integrated effect of medical lamp position and diffuser discharge velocity on ultra-clean ventilation performance in an operating theatre

    AbstractThe ventilation system of an operating theatre (OT) in a hospital needs to provide a comfortable and healthy surgical environment, particularly to minimise the risk of airborne infection. Engineering standards are available to outline specialised ventilation design and installation requirements based on knowledge accumulated from quality research and day-to-day practices. In this paper, ...


    By SAGE Publications

  • Gas Detection and Monitoring Systems

    In greenhouse applications, the accurate measurement of a number of environmental parameters such as carbon dioxide concentration, temperature, light intensity, water, humidity, pH and nutrient levels using sophisticated sensors is used to create a controlled environment for optimising plant growth rates while minimising energy usage. Carbon dioxide concentration is also one of the best ...


    By Edinburgh Instruments Ltd

  • A road map for emerging low-exergy HVAC systems

    An exergy-conscious life cycle costing algorithm was developed. This algorithm establishes a reference tool to compare conventional air conditioning systems with alternative HVAC systems, which can directly operate with low-exergy alternative energy resources. The cost of exergy waste in conventional heating, ventilating, and air-conditioning systems (HVAC) is included in terms of the difference ...


    By Inderscience Publishers

  • Venting your Sewage Treatment System

    The venting for the BIOROCK Sewage Treatment System is probably the key point of the system. The venting is specific to your site; again, why we emphasize the service of a certified recommended installer to install the BIOROCK Sewage Treatment Plant correctly. BIOROCK Venting Guidelines However, there are some simple tricks to follow in order that the continuous draft of air necessary to ...


    By BIOROCK S.à.r.l

  • Retrofit Intelligent Dust Extraction System

    Western Air Ducts Retrofits Intelligent LEV Solution at City of Oxford College The proffesionally equiped woodworking workshop at the Rycotewood Furniture Centre, at the City of Oxford College city centre campus, is a key resource for the many students of furniture design and ...


    By Inteliair Ltd

  • Modeling the Formation and Fate of Odorous Substances in Collection Systems

    A conceptual model that simulates the formation and fate of odorous substances in branched collection systems is presented. The model predicts the activity of the relevant biomass phenotypes under aerobic, anoxic and anaerobic conditions in force mains and gravity sewers. The formation and fate of individual, malodorous substances in the bulk water, the biofilms and the sediments are modeled. The ...

  • Thermodynamic analyses of advanced desiccant cooling systems with various configurations

    Six configurations of conventional and advanced desiccant cooling systems are presented, analysed and compared thermodynamically. The advanced systems are modified forms of the conventional systems. These advanced systems are desiccant cooling systems in the ventilation mode (ADV), the modified ventilation mode (ADMV) and the recirculation mode (ADR). For each configuration, a thermodynamic model ...


    By Inderscience Publishers

  • Hydrogen Sulfide Scrubber Systems in Hydrometallurgical Application

    Hydrogen Sulfide is a highly toxic and flammable gas. Being heavier than air, it tends to accumulate at the bottom of poorly ventilated spaces. Although very pungent at first, it quickly deadens the sense of smell, so potential victims may be unaware of its presence until it is too late. The lethal concentration for 50% of humans is 800ppm for 5 minutes of exposure. H2S is a by-product in many ...


    By Macrotek Inc.

  • Analysis of PCB in water using the envirogard test system

    MATRIX: Water ANALYTE: PCB LIMIT OF DETECTION: Aroclor 1248: 1 ppm Aroclor 1260: 2 ppm Aroclor 1242: 2 ppm Aroclor 1254: 1.1 ppm BACKGROUND: This application describes a field screening method for determining PCB concentrations in water. A chemical reaction is induced that causes a color change ...


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