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Technical & Practical

Distillation Optimization By Vapor Recompression

Distillation is one of the most extensively used operations in the chemical process industries (CPI). It is a highly energy-intensive unit operation, and continuously rising energy costs make it imperative to look for ways to reduce energy requirements. Some energy-saving…

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Condition Monitoring for Rotating Machinery

Rotating machines, such as pumps, compressors, gas turbines, steam turbines and electric motors, play crucial roles in most chemical process industries (CPI) facilities. Increasingly, advanced condition monitoring is being used to improve the operation and maintenance of these workhorse components.…

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How to Disperse Gases in Liquids

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Calculating Pressure-Release Times

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Effects of CO2 in Steam Systems

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Vessel Sizing and Level Instrumentation

Level measurement and control in process vessels can be one of the most challenging applications in which to obtain consistently safe and reliable results. Part of this difficulty may be due to the fact that the sizing of the vessel…

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Effective Thermal Design Of Cooling Towers

Various misconceptions arise when it comes to the thermal design of cooling towers. Sometimes related parameters, such as range, approach, effectiveness, liquid-to-gas ratio ( L/G), wet-bulb temperature, cooling water temperature, relative humidity, number of transfer units (NTU) and other terms…

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Choosing Oil-injected Screw Compressors

  Screw compressors are widely used throughout the chemical process industries (CPI) and represent a substantial percentage of all positive-displacement compressors that are now sold and in operation in CPI facilities. In general, screw compressors are efficient, reliable, simple and…

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Control Strategies Based On Realtime Particle Size Analysis

The pursuit of manufacturing excellence is a strong theme across all of the chemical process industries (CPI). Improving operations by eliminating variability and waste, a cornerstone of the six sigma approach, is essential for competitive performance in the global marketplace.…

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Designing Shell and Tube Heat Exchangers: Consider Two-Phase Flow

In the chemical process industries (CPI) it is relatively common to use a homogeneous two-phase flow model to predict the pressure drop through the shell-side of horizontal heat exchangers that handle two-phase mixtures. Recent experimental studies reported by HTFS [1,…