Archives :: Processing & Handling :: Liquid, Gas and Air Handling :: Ducts & ventilation systems

Displaying 1 - 5 of 5 stories.
February 1, 2014
Compressible gas flow with significant variation in density along pipes is commonplace in the chemical processing industries (CPI). In designing these pipes for compressible flow, it is important to calculate the pressure loss or maximum gas-handling capacity for safety and economic reasons. Due to the complexity of the equations for compressible flow, which often require time-consuming iterations, current...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/ducts_and_ventilation_systems/Compressible-Fluid-Flow-Calculation-Methods_11438.html
February 1, 2014
Would you like to make a quick mental calculation to determine approximate flowrate, velocity, or pipe and duct sizes for many common situations? This article presents two methods for estimating flow characteristics without the aid of charts, tables, calculators or software programs. One method applies to liquid flow in pipes, and the other to air flow in ducts. The techniques are intended to be simple...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/ducts_and_ventilation_systems/Quick-Pipe-and-Duct-Flow-Calculations_11439.html
June 1, 2007
      The cost to power fans and ventilators in the chemical process industries (CPI) is a significant consideration in efficient system design. More than 25% of the energy consumed in most CPI plants is used to power fans for ventilation and air-pollution-control systems. Annual operating costs for these units can easily exceed the initial capital cost of the equipment in two years (see...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/ducts_and_ventilation_systems/Energy-Efficiency-Optimizing-the-Air-Power-Equation_3149.html
December 1, 2006
    Reinforced PVC makes a kink-free hose Kink- and crush-resistant Vardex hose (photo) for both pressure and vacuum applications is now available from this manufacturer. Made of clear PVC with steel wire reinforcement, Vardex is suitable for either fluid or air transfer. Applications include chemical lines, material handling, cleaning equipment, water feeds and discharge, vacuum lines, shop...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/ducts_and_ventilation_systems/Pipe-and-Fittings_2838.html
March 1, 2006
    A direct link between the size of particles and their potential for causing health problems is what has the U.S. Environmental Protection Agency (EPA; Washington, D.C.; epa.gov) concerned about particulate matter (PM) that is 10µm in diameter or smaller. Renewed concerns have prompted the chemical process industries (CPI) to seek out more efficient dust-control systems that can handle...
http://www.chemengonline.com/processing_and_handling/liquid_gas_and_air_handling/ducts_and_ventilation_systems/Dust-collection-focuses-on-smaller-particles_3070.html

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