A motor vessel has two centrifuges to pre-treat fuel to the engine(s) which may be configured to operate in series or parallel. A large quantity of water has been determined to be present in the fuel. What actions would you take to minimize the effect of water prior to fuel injection?
• Centrifuge operating modes: difference between a purifier (removes water + solids with correct interface setting) and a clarifier (removes solids only, no water seal) • Series vs. parallel operation: how putting centrifuges in series affects cleaning quality versus throughput when water level is high • Throughput and shoot cycles: how lower flow and more frequent sludge discharge affect separation efficiency when dealing with a lot of water
• Which configuration would maximize water removal when there is an abnormally high water content—do you want more retention time or more flow? • In this situation, is your first priority to keep normal throughput, or to protect engines and injection equipment even if it means reduced capacity? • How do purifier vs. clarifier modes differ in their ability to separate free water from the fuel, and how can you combine these strengths?
• Verify which mode (purifier vs clarifier) is specifically used for separating water from fuel, not just solids • Check which options explicitly change throughput and shoot frequency to improve separation when contamination is severe • Confirm which configuration uses both machines’ capabilities in series to give the fuel two stages of treatment, focusing first on bulk water removal then polishing
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