Displaying 76–100 of 207 results for Andrew Sloley, Contributing Editor
Select the Right Reboiler -- Understand the strengths and weaknesses of various options.
When designing a good separator, the geometric layout must balance several criteria to get a drum that will operate successfully.
A side-draw may cut capital and energy costs for distillation.
The lesson here is that published material isn't always right. Rules-of-thumb and standard practices can be slavishly copied out of context, or even be wrong from the very beginning. Apply engineering fundamentals and always ask: "Does this make sense?"
Ensuring proper control of parallel flow paths demands care.
Address the risk of one unit compromising the performance of another
Choosing the most-appropriate heads is the starting point to a cost-effective and usable shell-and-tube exchanger.
Water sprays may boost performance of air-fin exchangers.
Unusual tower configuration better copes with control valve failure.
Guidelines for designing a shell-and-tube heat exchangers.
Insufficient flow conditioning often undermines measurement accuracy.
Many people have trouble grasping the idea of backward flow in a centrifugal pump.
Consider a variety of factors when selecting a shell-and-tube or air-fin condenser.
If you must use liquid level inside a column to infer flow rate, take steps to address the most common reasons for failure. Here are some basic guidelines.
Precisely measuring internal flow within a column can improve control. Finding this flow usually requires removing it. Using a pump to return the flow offers advantages and disadvantages compared to using gravity flow.
Without good samples, controlling the process can be difficult and expensive mistakes can occur. Accounting for sorption effects and using fast-loop systems can help ensure getting truly representative samples.
The process design basis document pulls together a variety of project parameters. Deficiencies in the document can undermine the success of a project.
Plants rely on strainers to remove particulates, installing the hardware temporarily or permanently depending upon requirements. Choosing the right strainer for a particular service requires consideration of number of factors.
Control valves do not seal 100% tight. ANSI classifies the valves into six leak classes. The higher the class, the higher the valve cost. So, engineers should carefully match the valve they select to process requirements.
Close control of liquid and vapor rates inside distillation columns may provide significant benefits. This requires knowing internal flows. Don’t rely on a heat and material balance to get them unless there’s no other option.
Different project lives and uneven cash flows make payback analysis less useful, but it does make sense in certain circumstances.
When flow control is needed for a positive displacement pump, the options aren’t the same as for a centrifugal pump. Several approaches can be used. These include changing the speed of the pump or using an external recycle loop.
An extensive review of engineering standards, many publications and the proceedings of a key conference determine the role of pump inlet velocity in centrifugal pump selection.
The first turnaround allows you to better grasp how equipment is put together and what common problems in your facility look like.
Bypasses often are installed around control valves to ease maintenance of the valves. Some plants allow flow through a bypass during normal operations to boost capacity. Such use of a bypass demands thoughtful analysis.