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Ben Keiser

Problems With Heat Exchanger Specified Heat Rate In Constants?

Using “Specified Heat Rate In Constants” for the thermal model of heat exchangers can often cause problems in system models.  The reason why is because this thermal model type causes the heat exchanger to act like an “assigned heat input” junction as does an assigned flow junction does for providing constant flow rates.  Another problem is that this thermal model can cause unrealistic temperature changes across a heat exchanger.  When the heat rate is specified and the mass flow rate and heat capacity are calculated based on the system solution, the temperature change will be whatever is required to maintain the...
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Des Aubery
Very useful tip. Thank you. In many heat-exchangers, the relationship between heat-transfer & flow-rate would have a curve with c... Read More
Wednesday, 10 April 2013 09:37
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Trey Walters

My 50th Anniversary Visit to the Site of John Glenn’s First American Flight Into Space

Many of you probably saw in the news that today, Monday, February 20th, is the 50 th anniversary of John Glenn’s flight into space. The flight was aboard a Mercury-Atlas rocket dubbed Friendship 7. This historic event was a significant step on the way to the Apollo missions to the moon. By good fortune the NASA contractors at Kennedy Space Center had scheduled an AFT training class last week, and I traveled to Florida to teach the class. I took some time to tour the Space Center and Cape Canaveral one evening and was able to visit Complex 14 where the launch took place....
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Trey Walters

Why I Like Bill Gates More Than Steve Jobs

I have an iPod - to which I am very attached. I have had my iPod Nano for a couple years now. All of my kids and my wife have iPods. I hike frequently in the Colorado Mountains near where I live and I can’t do it without my iPod. I can’t work out at the gym without my iPod. I can’t drive my car without my iPod. I have an iPhone – to which I am very attached. I have had my iPhone for about 6 months now. It goes with me everywhere and – along with AT&T – was...
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Applied Flow Technology

Integrating Component and Fitting Losses into a Single Pipe on the Workspace

Many components, such as isolation valves, elbows, and adjacent area changes, do not need to be modeled graphically when a simple k factor will suffice. In these cases, the AFT Fathom user can simplify and avoid unnecessary workspace clutter by integrating this data into a single pipe specification, using the Fittings & Losses tab. Fathom has a built library of component loss data provided by Miller, Crane, and Idelchik. The Fathom user can quickly and easily pick from a database of components, enter the quantity, and click OK. It is important to note, however, that Fathom uses the size of the...
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Ray Cameron
Gerardo, thank you for your interest in our software. Free demo downloads are available by simply going to https://www.aft.com/dow... Read More
Wednesday, 08 February 2012 01:09
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Applied Flow Technology

Backup Files

All AFT Products automatically generate backup files each time you save your model. Backup files will be saved to the same location you have saved your model file to. They will have the exact file name as your model, but rather than having the extension *.fth, *.aro, *.imp, etc., they will have the extension *.001, *.002, *.003, etc. Every time you click save while working in your model, a new backup file will be created. If the maximum number of backup files already exists, the new backup file will overwrite the oldest backup file. The maximum number of backup files created...
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Trey Walters

It’s the Economy, Stupid. Or Is It?

A few months ago I attended a CEO forum in Colorado where a big topic on the minds of the 1000 CEOs in attendance was the state and direction of the US and global economy. The keynote speaker Brian Beaulieu began his presentation with this assessment of the economy from TIME magazine: The U.S. economy remains almost comatose. The current slump already ranks as the longest period of sustained weakness since the Great Depression. Once-in-a-lifetime dislocations will take years to work out.  Among them: the job drought, the debt hangover, the defense-industry contraction, the banking collapse, the real estate depression, the health-care...
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Ben Keiser

The Quickest Way to Learn AFT Products

After you receive your AFT software , you will probably wonder how to learn the software quickly so you can begin using it.  AFT provides a very handy Quick Start Guide for each software product in English Units and SI Units.  These quick start guides are short, concise, would take maybe a day of your time, and are extremely powerful to assist you in producing highly accurate and advanced models! With larger companies, sometimes the AFT software will go straight to the IT department for installation and the engineer may never see the hard copy of the quick start guides.  Not...
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Ben Keiser
Hi Max, No problem! You can email your model file to us at support@aft.com. Also, we have included several (about 76) different... Read More
Wednesday, 26 August 2015 19:37
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