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Big Blue
P3

Propulsion Performance Processing, or P3 Technology, is based on a series of proprietary algorithms that permit online assessment of the vessel's propulsion loading and the effects of sea and wind on the hull as it moves through the water.

This assessment is done continually, and the result of these calculations creates an output to the engine throttles which is used to optimize the voyage in reaction to the changing conditions.

Concept

P3 Technology is based on the theorem that a vessel's increase or decrease in RPM has a cubed effect on the fuel used to obtain it (as a comparison, in an automobile this relationship is squared).

The System

The unit's accurate ground speed is the cornerstone of this technology -- accuracy of 1/10 knot makes closed-loop control a reality.

High-precision speed coupled with rack position and RPM for engine loading are the sensor inputs required for the calculations. The software algorithms use these inputs to determine the conditions which are affecting the vessel's passage through the water; they also provide a high-precision output to control the throttle or pitch settings of the vessel. These slight automatic adjustments have a dramatic effect on the fuel used.

The system employs Eurisic analysis techniques (artificial intelligence) automatically. It learns in each mode and makes judgments based on that learning experience.

Other information (byproducts of the system) made available is fuel consumed and horse power per engine. The real benefit of employing this technology is a reduced operating cost due to lower fuel consumption (5-7%), all with no reduction in vessel speed. It can be proven in one trip.

The Test

The following test was conducted using an IBM PC with EMS analysis software installed on each unit supplied.

The enclosed data was taken on the same vessel during two successive 95-minute periods. During the first period, the vessel was operated at its normal cruising speed of 425 RPM. This produced an average speed of 20.92 knots. The fuel used was 2,375 liters, and the distance traveled was 26.5 nautical miles (NM). This averaged 89 liters per mile.

During the second period, the P3 technology was engaged and was set for a speed (not RPM) of 20.9 knots. The proprietary algorithm adjusted the RPM over a range of 2.5%, the average RPM being 419 RPM (or 6 RPM lower than the fixed setting) with no loss of speed and a fuel consumption of 22.36 liters over a distance of 26.9 NM. This averaged 82 liters per mile and a 7.5% fuel reduction. The PC analysis program also permits instant comparison of engines before and after overhauls, propeller efficiency, hull coatings, etc., as they relate to fuel and speed.

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