May 2013

Refining Developments

Optimize vacuum ejector operations

Vacuum distillation unit (VDU) designs generally involve jet ejectors due to their low capital and operating expenses, high reliability, durability and simplicity. Once the ejector is installed and co..

Temur, T., Haktanir, M., Uzman, F., Karakaya, M., Turkish Petroleum Refineries Corp. (Tüpraş); Avci, A. K., Boğaziçi University

Vacuum distillation unit (VDU) designs generally involve jet ejectors due to their low capital and operating expenses, high reliability, durability and simplicity. Once the ejector is installed and commissioned, it may never require any maintenance as long as it is operated within its design limits. The major drawbacks associated with using ejectors are the dramatic performance losses with deviations from operating condition limits and low thermal efficiency.1 Ejector models, found in the literature, were developed for design purposes that estimate the cross-sectional areas of the converging and diverging sections or their respective ratios, and for determining intermediate pressures and ve

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