Articles

What is the Difference between the Effectiveness-NTU and LMTD Methods for Analyzing Heat Exchangers?

As with any engineering problem, there are various ways to approach a solution when sizing and selecting a heat exchanger or analyzing its thermal performance. If the selected heat exchanger is undersized, the design heat transfer conditions will not be achieved. The Effectiveness-NTU and LMTD are two solution methods that approach heat exchanger analysis from different angles. Understanding the difference between these two methods starts with knowing the key terminology and equations used in each.
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How to Avoid Over-Controlled Errors by Correctly Modeling Pumps in Series Using PIPE-FLO®

Pumps are often operated in series when pipeline and component losses in the system are substantial, and it is not feasible to achieve the required total head with a single pump. Series pump operation is easily modeled in PIPE-FLO®. It’s easy to set-up the sizing of pumps for series operation with a few additional steps. Read this month’s Take a Deeper Look to learn more…
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Knowing Your Zero Can Reduce Costly Mistakes

In life, numbers are used to describe the amount of something, whether it’s the cost of a product, how fast you are driving, or how old your children are. But a number is meaningless unless it has two things: a unit and a zero reference datum. In engineering, miscommunication, confusion, and costly mistakes occur when numbers are used without proper attention to units or their relationship to a reference point.
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The Elements: How to Gain a Clear View of Your Pump System

There is often resistance to Pump System Improvement programs because pump systems span a wide variety of departments within an operating plant making it difficult for everyone involved to gain a clear understanding of how a piping system operates. This month we will explore the various components of a piping system and how they work together so everyone involved can visualize how the system operates.
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8 Years of Chronic Control Valve Cavitation Solved in Hours with PIPE-FLO®

For 8 years, a process plant in Texas had been experiencing serious cavitation problems in a control valve located in the plant’s spray system. After attending an ESI Learning FLO-Master training course the plant engineer eagerly built a model of the system in PIPE-FLO®. Using the PIPE-FLO® model the plant engineer discovered the reason for the valve cavitation, explored options, and confidently made the proposed changes saving the plant over $12,000 annually in operating and maintenance costs.
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Importing GIS Data

This GIS database contains latitude / longitude and elevation data for the entire geographical area. In addition to maintaining this database, part of the designer’s responsibility is to perform hydraulic analyses on the areas which are being serviced. PIPE-FLO® Professional software can perform these detailed network analyses. So how can these tools be used together to optimize the effectiveness of the water distribution system design?
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How-To Select a Pump for Varying Load Applications Using PUMP-FLO® Premium

Nobody wants to be the person responsible for procuring an undersized pump. Your fellow engineers would never let you hear the end of it. Unfortunately, this is the ideology that often leads to pumps being oversized for their respected applications, and the resultant increase in operating and maintenance costs. So, how do you balance being careful to select a pump which meets the worst case operating conditions and be able to meet the demands of partial flow or varying load conditions? There are features in PUMP-FLO™ Premium that can be used to your advantage when evaluating pumps under varying load conditions…
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Case Study

Welcome to the final case study of the three part series we have been following. This ESI News Brief will feature, Minimizing Maintenance Costs with PIPE-FLO® Professional. In these case studies, the companies’ piping systems were able to meet the requirements of the end user, with a minimum capital, maintenance and operating cost by utilizing ESI’s PIPE-FLO® simulation software and ultimately saving thousands over the lifetime of the plant. Find out how.
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Take A Deeper Look

The intuitive user interface makes it easy to quickly model complex piping systems, perform hydraulic analysis and display calculated results. The all-new Gradient Colors feature in PIPE-FLO® Pro gives users the ability to view the piping system from different perspectives at various times in the modeling process with full color. This visual delineation helps identify costly design flaws and operational issues, in the model, prior to implementation. For a deeper look at this feature…
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