On the Errors of Thermodynamic Method for Measuring Efficiency of Water Turbines

Abstract

This article describes the probable inaccuracy of thermodynamic method for measuring the efficiency of water turbine. More than twenty water turbines have been tested by this method in Japan already. The writers investigate each error which would happen in all measuring operations, and present the value of probable inaccuracy for the effective head of turbine tested. From the result, the thermodynamic method is thought to be one of the excellant methods for measuring the efficiency of water turbine.