SPR 2017

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H eadquartered near Indianapolis, the AHRI- certified plate and frame heat exchanger manufacturer Wessels Company is very familiar with Purdue University. In fact, the company has employed many graduates from the engineering school over the years, including today's 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. GROWING PAINS 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 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 > 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. PERFECT CLIMATE FOR EFFICIENCY, ENERGY SAVINGS To fulfill 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," said Gary Trumpfheller, heat transfer busi- ness unit manager at Wessels Company. Free cooling heat exchangers, also known as economizers, are required to meet ASHRAE Standard 90.1 2010 Energy Standard for Buildings I-P Edi- tion. 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 = 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 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 exchang- ers, the company has over 100 years of manufacturing experience providing ex- pansion tanks, filtration vessels, media pots, glycol packages, separators and more. CHECK OR CIRCLE #169 Wessels heat exchangers cool energy costs at a major American university Cooling Down Campus Costs Purdue University recently embarked on a fi ve-year plan to meet the demand for year-round chilled water. Two Wessels heat exchangers help supply chilled water to over 150 buildings on the campus. Bottom Left: WesPlate and frame heat exchangers are assembled at the company's large tank facility in Tiffi n, Ohio. case study /heat exchangers 1-800-697-6283 M0395401 www. .info • Save time, money & your back & LiftGates • Superior product design • Customer care program • Operator training • Accessories for every job • Top-of-the-line and maintenance-free battery ® M0396700 CIRCLE ID# 25 ON READER SERVICE CARD OR GO TO HVACPPRODUCTS.COM/MARKET

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