Consulting-Specifying Engineer - December 2008 - (Page A3)

In many cases, replacement of an older oven with a new model, such as this new impingement oven by Aeroglide, will not only increase energy efﬁciency, but will increase production potential. NEW IDEAS Opportunities Exist for Major Energy Savings With Industrial Ovens WWW.ENERGYSOLUTIONSCENTER.ORG In the Oven CHANGES TAKING PLACE IN THE DESIGN of industrial ovens promise major energy savings. Even a modest improvement in existing oven operations can save signiﬁcant energy. Often it’s just a matter of adjusting the oven to optimum settings for the product. A new oven with full energy efﬁciency design can provide even larger savings. Let’s conﬁne our discussion to gas-ﬁred thermal ovens used in industrial applications. Operating temperatures may range from a few hundred degrees to as high as 1200°F. Generally, units that operate at higher temperatures and have rigid steel plate walls are classiﬁed as furnaces. Ovens usually have insulated sheet metal walls. The oven may be a batch type, or a continuous conveyor oven. The purpose may range from baking pastry to heat treating steel. But the common thread is an enclosed space with a controlled hightemperature environment. large as a 100 foot-long conveyor oven in a commercial bakery or food plant. The common characteristic is the use of a controlled natural gas burner to provide heat at a speciﬁed level. One of the major oven manufacturers is Wisconsin Oven Corporation. The East Troy, Wisconsin manufacturer has a broad range of batch, conveyor, quench and many specialty thermal ovens. According to Mike Grande, Technical Vice President with the ﬁrm, there is growing customer interest in achieving maximum efﬁciency. “There are steps owners can take, many of which are with existing ovens, and there are exciting potential energy savings with new oven equipment.” Steps to Improve Efﬁciency With existing ovens, he explains, a practical step is to use the idle mode when the oven is not in use for a few hours. Sometimes this feature is already installed on the oven, but not being used. Grande says, “It takes considerable energy to heat an oven up from cold.” On-site energy monitoring can help the industrial owner verify the relative efﬁciencies of longer standby intervals versus shutting down the oven and re-starting in advance of use. Ovens for Every Purpose Manufacturers offer ovens for many specialized uses. The loading systems, temperature ranges, and required level of precision vary. It may be as small as a bench oven in a metallurgical shop or as gastechnology / WINTER 08 A3 http://WWW.ENERGYSOLUTIONSCENTER.ORG

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Consulting-Specifying Engineer - December 2008 Contents Viewpoint News M/E Roundtable ARC Awards New Construction Gold New Construction Silver New Construction Bronze Renovation Gold Renovation Silver A Green Approach to Air Conditioning Systems Turning Down the Lights Case Study New Products Equipment Lifecycles Advertiser Index Green Space Gas Technology Pure Power Supplement

Consulting-Specifying Engineer - December 2008

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