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Cooling Down Campus Costs with Wessels Company


CASE STUDY: Purdue University


How Wessels heat exchangers cooled energy costs at a major American University

West Lafayette, IN – Headquartered near Indianapolis, the AHRI certified plate and frame heat exchanger manufacturer Wessels Company is very familiar with Purdue University. In fact, Wessels has employed many graduates from the famous engineering school over the years, including their current engineering manager. So, when Purdue University came to the company in need of large heat exchangers to improve its campus chiller plant performance, Wessels was ready to tackle the challenge head-on.

An American Institution

Purdue University is the institute of science, technology and agriculture in West Lafayette, Indiana, that houses nearly 30,000 students and is known for its highly esteemed engineering program. This penchant for engineering excellence is evident in the design of the campus, which has over 150 buildings and is self-sufficient in all its HVAC needs. Some of those HVAC needs are met with: 12 chillers, 4 steam boilers, 2 turbine generators, and a cooling, closed water circulation loop that distributes 45°F chilled water out to the campus.

However, faced with growing demand for year-round chilled water due to campus growth and an inefficient existing system, the University embarked on a five-year plan to improve the system. To meet the new demands and save money and energy with a more efficient system, Purdue turned to Wessels Company.

Engineering Efficiency

To meet the requirements of improved chiller efficiency, Purdue University installed two of Wessels Company’s enormous WP123 plate and frame heat exchangers. These heat exchangers were installed in the free cooling mode, which means when the outside temperature is low enough, chilled water demands can be satisfied using just the heat exchanger and a cooling tower. This allows the chiller station’s expensive compressors to be shut down, which in turn leads to tremendous energy savings.

“Because of the local climate, Purdue was an excellent candidate for heat exchanger-based free cooling.” – Gary Trumpfheller, Heat Transfer Business Unit Manager at Wessels Company

Purdue was an excellent candidate for this kind of free cooling because of the year-round demand for chilled water and the local climate. Free cooling heat exchangers, also known as economizers, are now required to meet ASHRAE STANDARD 90.1 2010 Energy Standard for Buildings I-P Edition. This standard outlines areas of the country where chillers used for comfort cooling or data centers must have economizers included. It also specifies that heat exchangers must be AHRI Certified to Standard 400 for liquid to liquid heat exchangers.

Energy Savings Mean Cost Savings

The estimated annual savings for the Purdue project, and other projects of its size, are approximately $500,000. Wessels Company prides itself on being able is to provide sustainable energy saving solutions that save money and help make a greener HVAC world. In addition to plate and frame, shell and tube, and brazed plate heat exchangers, Wessels has over 100 years of manufacturing experience providing expansion tanks, filtration vessels, media pots, glycol packages, separators, and more.

For more information, visit

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NEW! Reference Catalog 2016

NEW! Reference Catalog 2016

The new Wessels Company Reference Catalog is here!

The Wessels product offering has increased dramatically in the last few years and we are proud to introduce several additions to our updated Reference Catalog.

The reference catalog is also more than just products. The catalog features quick sizing and selection charts that make the job of quoting product fast and accurate. Dimensions and weights are shown to obtain quick shipping rates from your preferred transport company.

Wessels is known for its competitive pricing and we look forward to continuing to offer the best prices in the industry. For accurate quotes and pricing, please contact a Wessels Company representative in your area.

Download Reference Catalog
Buffer Tank Revit BIM Added

Buffer Tank Revit BIM Added


Wessels Company has added Hot Water Buffer Tank and Chilled Water Buffer Tank Revit (.rfa) and AutoCAD (.SAT) 3D models free to download from our BIM webpage.

Check it out now:

What is BIM? | Building Information Modeling

Browse and download from our available catalog of 3D building information models (BIM) in the industry standard Revit or .SAT file formats. You can also find BIM on certain product pages. Just keep an eye out for the download button.

Buffer Tank Calculator UPDATE!

Buffer Tank Calculator UPDATE!

Check it out! We’ve added Buffer Tank calculation to our expansion tank sizing calculator. Now it’s as simple as opening a web browser or the Wessels Company phone apps, typing in your requirements, and hitting enter. Size a custom Buffer Tank, generate a submittal, and send a quote request in just seconds!

Size Your Tank

We’ve also made it easy to convert compression tanks into bladder expansion tanks. Just click “Compression Conversion,” enter your tank’s volume and minimum pre-charge pressure, and let the calculator do the rest!


Have questions? Email us at

Submittal PDF Update

Submittal PDF Update

new-submittalWorking with Wessels Company’s PDF submittals just got a whole lot easier!

We’ve updated our submittals to be fillable and savable (Adobe Acrobat Required). Now you can click a field, add your text, and save your submittal right to your computer without having to print.

Wessels Company’s submittals are now fully editable, savable, searchable, and bookmarkable for your convenience.

Try it out now with this bladder expansion tank submittal or by clicking the image on the right.

WesPlate® AHRI Certified

WesPlate® AHRI Certified

Wessels Company is proud to announce the official AHRI certification of WesPlate® Heat Exchangers.

WesPlate® is certified under AHRI standard 400 Liquid to Liquid Heat Exchangers, which means you can continue to expect the absolute best in full energy recovery from Wessels Company engineering and manufacturing.

Wessels Company is committed to providing the best in sustainable energy solutions for the HVAC industry. Now it’s easier than ever to get your WesPlate® order sized and submitted using our online web sizer.

Introducing WesPlate Sizing 2.0

Introducing WesPlate Sizing 2.0

Wessels WesPlate Sizing 2.0

The popular, easy-to-use, web-based heat exchanger sizing program just got even better. See how by signing up for a free account.

Brought to you by


Register Now *


* Already registered with our old sizing software? Don’t worry! Your account will be automatically transferred.

What’s New in 2.0

– Streamlined Submittals (view

– New Competitive Pricing

– 6 New Models Added

– Plates Now Stock Up to 8″

Connection Size


New Product! Wessels Condensate Neutralizer

New Product! Wessels Condensate Neutralizer

The Neutralizer

The Wessels Condensate Neutralizer (WCN) is a brand-new
innovation in the field of acidic condensate neutralization for
HVAC systems. The unit is divided into three sections with
easy-to-replace bags of neutralizing media in each chamber.

The media bags feature convenient expiration labels so you can
track their performance and replace only when necessary. Use only what you need!




To learn more about the Wessels Condensate Neutralizer (WCN), download the brochure by clicking the image on the right.

You can also download the brochure by clicking here.


New Brochure!
WesPac® Brazed Heat Exchanger

The new WesPac® Brazed Heat Exchanger brochure is ready to download!

Learn more about this exciting new product by clicking the image on the left or by clicking here.