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Vacuum systems save on energy costs

27 July 2006

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Croll Reynolds reports that it is presently at work with clients throughout China designing energy efficient vacuum systems for new plants and providing designs to replace older, inefficient systems at existing plants. At one plant, working with a major petrochemical company in northern China, Croll Reynolds engineers designed a four stage ejector system which uses 10 percent less steam than the system offered by another supplier, saving the company $100,000 per year.

In another plant, Croll Reynolds was asked to design an ejector system to replace an existing vacuum system installation at an edible oil plant. The old system was operating substantially below its specified capacity, requiring more steam and water than originally planned. A Croll Reynolds three stage replacement system allowed the company to increase its operating capacity and reduce utility requirements by 20 percent. And in a third example, Croll Reynolds said it has designed a hybrid ejector/liquid ring pump for a flavors and fragrance plant that provided reliable service at one half the utility requirements normally required to operate a conventional four stage ejector system.

In addition to optimizing the efficiency of ejector systems, Croll Reynolds offers plant operators hybrid ejector/liquid ring pump designs that incorporate liquid ring pumps to replace the final stage or stages of the ejector systems. Some 30 years of experience in hybrid system design has made Croll Reynolds the leading supplier of these systems to the Chinese market.

At Croll Reynolds' modern research and test facilities in the US and India, the company's engineers are involved in an ongoing program to reduce the operating costs of steam ejector and hybrid ejector-liquid ring pump systems. This research effort coupled with advanced software has resulted in new design innovations for ejectors and condensers allowing Croll Reynolds to offer clients vacuum systems that operate at the highest possible efficiencies.