Etaeval GmbH products

"etahydro" is the brand of our solution for continuous efficiency monitoring in smart hydropower plants. Smart hydropower plants provide intelligent decision support. Based on continuous acquisition of relevant data, the condition of a hydropower plant or of individual hydro machines can be recorded (condition monitoring). Analysis of this input allows to anticipate inspection decisions (predictive maintenance). In addition, "etahydro" provides data for trading and dispatching enabling detection of deviations from optimal operation. Knowing the current efficiencies optimum operation of the hydropower plant becomes possible and, for example, shut downs can be planed in case of high suspended sediment loads.

Thermodynamic efficiency measurements are performed to determine the absolute efficiency of hydraulic machines. The procedure for such a measurement is described in detail within the IEC (International Electrotechnical Commission) standard 60041 "field acceptance tests to determine the hydraulic performance of hydraulic turbines, storage pumps and pump turbines". This standard is used worldwide for highly accurate measurements of efficiency of hydraulic machines. For measurements in small hydropower plants the IEC standard 62006 "hydraulic machines - acceptance tests of small hydroelectric installations" is appropriate.

Index measurements are carried out to determine the relative efficiency (index efficiency) of hydraulic machines. The procedures for index measurements and the different approaches are described in the IEC (International Electrotechnical Commission) standard 60041 "field acceptance tests to determine the hydraulic performance of hydraulic turbines, storage pumps and pump turbines". This standard is worldwide used for complex measurements of hydraulic machines. For measurements in small hydropower plants the IEC standard 62006 "hydraulic machines - acceptance tests of small hydroelectric installations" is appropriate.

Transient operation is inherent to the operation of hydroelectric power plants and water supply systems, since machines are started, stopped or work at time varying operating conditions.