Hydroelectric Power Station Monitoring Systems

Accusonic multipath flowmeter systems have been installed in over 700 penstocks and low head intakes throughout the world. The systems are used to determine individual unit and plant performance with an end result in improving plant efficiency. Systems have been installed in penstocks ranging from 1 to 13 meters in diameter. System accuracy in most applications is +0.5%.

Accusonic systems measure reliably, continuously, and contain no moving parts. The multiple path acoustic (ultrasonic) method is accepted in ASME Power Test Code 18 and IEC Pub 41 as an acceptable method of discharge measurement for contractual acceptance tests of turbines. The Accusonic 7500 Series flowmeters are the industry standard for high accuracy flow measurement in both buried and exposed penstocks. Contact Accusonic to receive copies of relevant sections of the test codes.

Accusonic flow measurement systems are also used for turbine efficiency monitoring.

Penstock Leak Detection Systems

When Accusonic flowmeters are installed at both the upper (intake) end and lower (powerhouse) end, penstock leakage or rupture can be quickly and reliably detected by automated monitoring of the flow differential. Since 1980 numerous Accusonic leak detection systems using this technique have been installed.

Turbine Efficiency Monitoring Systems (TEMS)

Accusonic's TEMS incorporate flow, power output, inlet and tailwater pressure measurements to provide on-line unit and plant efficiency data. These systems are used for continuous, permanent, monitoring as well as for acceptance test programs for new and replacement runners. Accusonic also provides an independent service for turbine field test programs.

Accusonic Technologies, Inc., 25 Bernard E. St. Jean Drive, E. Falmouth, MA 02536-4420. Tel: 508-495-6600; Fax: 508-495-6699.