SpinOffs

A blog on what's new, notable, and next in turbomachinery

Posts about Refrigeration

Going Through a Phase – Modeling Phase Change with Cubics

Going Through a Phase – Modeling Phase Change with Cubics

By Mark R. Anderson
Apr 26, 2019

When fluids undergo a phase change (see Phase Change - Make Mine a Double), it typically has a very significant effect of the flow behavior and energy level of the system.  Some examples of this are:...

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Phase Change - Make Mine a Double!

Phase Change - Make Mine a Double!

By Mark R. Anderson
Feb 22, 2019

As I’ve always said, there’s as much thermodynamics in a glass of beer, as there is in a power plant. Don't believe me? Read on. Phase change is common phenomena that we see all the time.  We’re most...

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7 Turbomachinery Themed Valentine’s Day Cards – Which is Your Favorite?

7 Turbomachinery Themed Valentine’s Day Cards – Which is Your Favorite?

By Barbara Shea
Feb 8, 2019

Valentine’s Day is February 14, and while some cynics refer to it as a “Hallmark holiday”, most people commemorate the day in some way. One of the biggest challenges is finding a card that perfectly...

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Reverse Engineering - Going from Part to Art

Reverse Engineering - Going from Part to Art

By Sharon Wight
Dec 7, 2018

Have you ever needed to know the exact geometry of a compressor that has been running for years in your process plant? Perhaps you need to analyze how it would perform if the process fluid had to be...

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There is No Such Thing as a Design Point

There is No Such Thing as a Design Point

By Dr. Peter Weitzman
Oct 26, 2018

Most turbomachines need to operate across a range of fluid flow rates and speeds. This is obvious in transportation applications where gas turbine engines and turbochargers need to operate at all of...

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Designing Turbomachinery is like Solving a Rubik's Cube

Designing Turbomachinery is like Solving a Rubik's Cube

By Barbara Shea
Sep 21, 2018

I think we can all agree that designing turbomachinery is hard. There are just so many moving parts (pun intended) in the design process, and they are all interconnected.  When you change the blade...

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Reverse-Brayton Cryocoolers

Reverse-Brayton Cryocoolers

By Dimitri Deserranno
Apr 19, 2018

Perhaps it is because Spring is so slow to come this year, but I have been thinking a lot about refrigeration and the different types of systems there are. Refrigeration systems that operate below...

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What Next for Wider Flow Range Centrifugal Compressors?

What Next for Wider Flow Range Centrifugal Compressors?

By Dr. Colin Osborne
Sep 21, 2017

Flow range is an essential consideration in the design of any centrifugal compressor system, regardless of the application. Adequate flow range is necessary, not only to assure that various...

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Shrouded or Open Impellers for Compressor Chillers - That is the Question

Shrouded or Open Impellers for Compressor Chillers - That is the Question

By Steve Kohr
Aug 2, 2017

One of the most important design choices facing a chiller compressor designer is whether to utilize open or shrouded impellers. The impacts of this verdict are wide ranging, which arguably makes this...

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Converting Chiller Compressors to the New Generation of Low GWP Refrigerants

Converting Chiller Compressors to the New Generation of Low GWP Refrigerants

By Dan Hinch
Jun 8, 2017

The chiller industry is under tremendous pressure to convert to new, more environmentally friendly refrigerants.  This change is driven by new global regulations including, the Montreal Protocol and...

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Optimization of Cycle Parameters, Fuel Consumption, and Weight of a Turboshaft Engine Using 1D Design Tools

Optimization of Cycle Parameters, Fuel Consumption, and Weight of a Turboshaft Engine Using 1D Design Tools

By Oleg Dubitsky
Jun 1, 2017

New engine development is a costly endeavor and making the right decisions early in the engine design is extremely important. It requires multi-disciplinary consideration of the engine thermodynamic...

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