Global Supplier Directory
Supplier Solutions
Whitepaper Library
Calendar of Events
Association Locator
Contents Pages
Market Research
Subscription Center

issue: October 2008 APPLIANCE Magazine

Engineering: Dish Drying with Zeolite

 Printable format
 Email this Article

BSH is using the absorption properties of zeolite to improve the drying performance in its dishwashers.

European appliance maker BSH Bosch und Siemens Hausgeräte GmbH (Munich, Germany; www.bsh-group.com) and The Bavarian Center for Applied Energy Research (ZAE Bayern) have jointly developed an innovative dishwasher drying system that is said to improve drying results and save energy.

The system is based on a silicate mineral called zeolite. According to Michael Rosenbauer, director of research and development, BSH Dishwasher, the mineral’s characteristic of absorbing water molecules and then releasing them as the temperature rises makes it very useful for industrial purposes, especially in dishwasher drying.

Rosenbauer explains: “The zeolite is held in a container under the dishwasher’s interior compartment—a filling and venting pipe connects the two together. The system is activated during the dishwasher’s drying phase. At the end of the last rinse, steam rises from the heated dishware and utensils. The warm, humid air is conducted from the interior compartment downward into the zeolite container. The mineral absorbs the moisture and, in doing so, releases heat energy. The now hot, dry air is redirected into the interior compartment and dries the dishes, glassware, and utensils much faster than our current drying systems.”

The system is also said to improve the drying of plastic dishware, keeps dishes from getting too hot upon completion of the wash cycle, and eliminates the steam that typically releases after the dishwasher door is opened.

While zeolite is available naturally, the BSH system uses a synthetic form which is common in industrial applications. Rosenbauer says that working with ZAE Bayern helped the appliance company understand the physical/chemical characterization of the mineral. The two organizations also worked together on the design of the absorption process.

Building on the resulting innovation, BSH has also discovered a way to use the energy necessary to regenerate the zeolite to also heat the water in the next run of the dishwasher. “With each new washing cycle, the zeolite regenerates during the normal dishwasher operation,” Rosenbauer says. “Air is thereby conducted from the interior compartment to a heating element, heated, and then directed further through the zeolite granules, releasing the previously absorbed moisture. The hot, moist air flows back into the dishwasher interior, where it helps quickly heat the dishware. A prime example of renewable energy.”


Daily News


Oct 21, 2014: AHRI Annual Meeting Registration Remains Open

Oct 20, 2014: Electrolux 3Q Operating Income up 29%

Oct 17, 2014: Whirlpool completes purchase of majority interest in Indesit

Oct 17, 2014: Corrected: AHRI Annual Meeting Registration Remains Open

Oct 17, 2014: Walmart will moderate brick-and-mortar growth and increase capital spending on e-commerce capabilities

More Daily News>>

RSS Feeds
Appliance Industry
Market Research


September 2014: Appliance Industry Focus: HVAC
June 2014: Appliance Magazine Market Insight: April 2014
May 2014: Appliance Magazine Market Insight: March 2014
April 2014: Appliance Magazine Market Insight: February 2014

Contact Us | About Us | Subscriptions | Advertising | Home
UBM Canon © 2014  

Please visit these other UBM Canon sites

UBM Canon Corporate | Design News | Test & Measurement World | Packaging Digest | EDN | Qmed | Plastics Today | Powder Bulk Solids | Canon Trade Shows