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Feedback improves oil pump efficiency

Feedback improves oil pump efficiency

Normal0falsefalsefalseEN-USX-NONEX-NONEMicrosoftInternetExplorer4In temperate and colder climates, it takes a lot to money and energy to heat homes, factories, and business. But that means there is lots of room for improved efficiencies. In many oil burning heaters and furnaces, for example, a 50 or 90-W motor with about 50% efficiency runs at full speed to pump the oil to the igniters even though the heat load could be met with the pump running at a lower speed. And at full speed, some of the oil that gets to the igniters goes unburned and is returned to the oil storage tank, so much of the pump’s work is wasted.

To prevent this waste of energy, engineers at Danfoss LLC developed the BFPM Pump. It is an oil pump powered by a permanent-magnet motor that can be easily controlled using feedback from pressure and temperature sensors. The pump runs at between 400 and 3,000 rpm to keep the oil pressure between 4 and 25 bar and the temperature within limits, regardless of the time of year. Tests show the new pump consumes 50 to 80% less power. It’s also half the size and weight of traditional single-phase pump motors. And because it keeps the pressure close to a steady-state rate, oil is burned continually rather than started and stopped repeatedly, which saves wear and tear on the pump and boiler.

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