A step forward: IEC 62097-Edition 2 - "Hydraulic Machines, Radial and Axial _ Methodology for Performance Transposition from Model to Prototype"

29th IAHR Symposium on Hydraulic Machinery and Systems

Wassong, Nadine Pajean^1 ; Iosfin, Jacob^2 ; Artner, Wolfgang^3 ; Tezuka, Kotaro^4

EDF, Savoie Technolac, Le Bourget du Lac Cedex

73373, France^1

BC Hydro, 6911 Southpoint Drive, A01, Burnaby

BC

V3N 4X8, Canada^2

Andritz Hydro GmbH, Lunzerstrasse 78, Linz

4031, Austria^3

Toshiba Energy Systems and Solutions Corporation, 2-4, Suehiro-cho, Tsrumi-ku, Yokohama

230-0045, Japan^4

关键词: Editorial changes;    Hydraulic efficiency;    Hydraulic energy;    Hydraulic machines;    Hydraulic performance;    Improved structures;    Measurement techniques;    Standard documents;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/240/2/022051/pdf
DOI  :  10.1088/1755-1315/240/2/022051

来源: IOP

【 摘 要 】

Advances in the technology of hydraulic machines for hydroelectric power plants provided the background for updating and revising the efficiency scale effect methodology of IEC 60193. The fundamental step forward in IEC 62097 is the standardization of scalable losses in specific hydraulic energy, leakage losses and disk friction losses. The transposition of the hydraulic performance is driven by the dependence of friction losses on Reynolds number Re and the effect of surface roughness Ra. Since the roughness of the actual machine components differs from part to part, the performance scale effect is evaluated for each individual part separately and then is finally summed up to obtain the overall performance transposition for a complete machine. After the release of IEC 62097 Edition 1 in 2009, comments on this standard were received and open or unclear topics identified. As a result, the new innovative concepts were introduced and developed, and editorial changes were implemented in Edition 2. This paper presents the significant improvements implemented in the release of IEC 62097 Edition 2 related to the performance transposition methodology for hydraulic machines through: a) addressing the shift in nED and QED in the performance scaling from the model to prototype; b) identifying two-step efficiency transposition as the primary method for deriving prototype efficiency based on the model test results; c) specifying recommended roughness measurement techniques and minimum prototype roughness values; d) readjusting scalable losses and leakage losses for models with peak efficiency exceeding the assumed maximum hydraulic efficiency specified in the standard; e) improved structure of the IEC 62097 standard document and "Excel" workbook providing clear and user friendly guidelines for the performance transposition calculations. The release of Edition 2 is a clear step forward in advancing the performance transposition methodology for radial and axial hydraulic machines.