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The electronics cooling "sweet spot" is between 85°F - 95°F. Any temperature lower is in danger of condensation which could lead to water forming on the electronics, anything higher can cause heat stress failure on the equipment. It is imperative that electronics get the proper cooling solutions. With manufacturing space in high demand, machine bundles have become smaller and liquid cooling has emerged as the most efficient and economical means of eradicating heat from enclosures. Liquid cooling is especially well adapted to hot, dirty environments where it provides a method of removing the heat from the machines. This liquid cooling method is an ideal solution for the makeup area in a commercial bakery. Many commercial bakeries still use air conditioners to cool their electronics in the make-up area because they are a convenient means of effective closed-loop electronics cooling. This is not a sustainable solution due to the high concentration of particulate in the air, ultimately leading to clogged air conditioners that fail. As an internal solution to this problem the doors to the enclosure are opened to provide the needed cooling, allowing


dust into the cabinet, doing more damage by compromising the NEMA 4/4X environment.


Fig2 : Flour and dust buildup inside their previous competitor unit

The proposed water solution provided by Pfannenberg is often the only method of providing sustainable, efficient, and reliable performance in such environments.

How the PWS Series Air/Water Heat Exchangers Helped:

Fig3 : Pfannenberg's PWS unit installed on enclosure

Pfannenberg's PWS Series Air/Water Heat Exchangers were an ideal solution for the Schwebel Baking Company - trouble free cooling of their electrical enclosures in areas with high amount of dust, moisture and flour in the air. The PWS Air/Water Heat Exchangers utilize glycol or a cool water source that is already available in the factory, to cool their electrical units. 

By installing Pfannenberg' s Air/Water Heat Exchangers, Schwebel's was able to see a big difference in the cleanliness of their electrical cabinets. Pfannenberg's Air/Water Heat Exchanger has no filters, which means there is no down time trying to change filters or having them becoming clogged. 

Not only were their electrical enclosures cleaner and required less maintenance, there was also a big difference in the efficiency of the cooled air. In the past, most of their AC units would cool the enclosures, but because their filters would get clogged with airborne particles, the stability of the cool air was not present. Pfannenberg has been able to provide the proper solution to keep the electronics cool and at a stable temperature, regardless of the environment.

The aftermath:

Pfannenberg implemented 4 PWS-3202 Air/Water Heat Exchangers at the Youngstown, Ohio Schwebel's facility in their Make-up area. There are energy savings when integrating a PWS Series Air/Water Heat exchanger. There are no compressors which reduce the energy usage and they tap into already existing water/glycol lines that run throughout the plant. 

The additional benefits that Schwebel's obtained:

  • Reduced maintenance costs
  • No filters - eliminated the risk of having a clogged system
  • Prevent unplanned repairs
  • Uses less energy - costs reduced

open air to water heat exchanger
Fig3 : Pfannenberg's Stainless Steel PWS Cooling Unit

The company's product, equipment, and employees are integral to Schwebel's operation. Schwebel's has spent many years building their strong reputation in the marketplace and with their customers; this is a top priority. Pfannenberg and Schwebel's have developed a strong relationship. Schwebel's has raved about the products and are beginning to implement more Pfannenberg products within their facility; such as installing Pfannenberg's PA X-1-05 Flashing Light Sounders

Pfannenberg products and solutions are designed to meet high quality requirements and operate in the harshest of conditions. Pfannenberg continues to strengthen its position as a leader in providing plant wide protection of electronics and personnel.

© 2012 Pfannenberg Incorporated | 716.685.6866