iTeh StandardsiTeh Standards
EURUSD
Your shopping cart is empty.
CLC

EN IEC 63461:2024

(Main)

Pelton hydraulic turbines - Model acceptance tests

Pelton hydraulic turbines - Model acceptance tests

IEC 63461:2024 applies to laboratory model tests of any type of Pelton hydraulic turbine with unit power greater than 5 MW. It contains the rules governing test conduct and provides measures to be taken if any phase of the tests is disputed. The main objectives of this document are: - to define the terms and quantities used; - to specify methods of testing and of measuring the quantities involved, in order to ascertain the hydraulic performance of the model; - to specify the methods of computation of results and of comparison with guarantees; - to determine if the contract guarantees that fall within the scope of this document have been fulfilled; - and to define the extent, content and structure of the final report. Full application of the procedures herein described is not generally justified for machines with smaller power. Nevertheless, this document can be used for such machines by agreement between the purchaser and the supplier.

Hydraulische Pelton Turbinen - Modellabnahmeprüfungen

Turbines Pelton - Essais de réception sur modèle

IEC 63461:2024 s’applique aux essais de modèles de laboratoire de tout type de turbine Pelton d’une puissance unitaire supérieure à 5 MW. Il fixe les règles de conduite de ces essais et spécifie les mesures à prendre en cas de contestation d’une phase quelconque des essais. Les principaux objectifs du présent document sont les suivants: - définir les termes et les grandeurs utilisés; - spécifier les méthodes d'essai et de mesure des grandeurs concernées, afin de déterminer les performances hydrauliques du modèle; - spécifier les méthodes de calcul des résultats et de comparaison avec les garanties; - déterminer si les garanties contractuelles qui relèvent du domaine d’application du présent document sont respectées; - et définir l’étendue, le contenu et la structure du rapport final. L’application intégrale des procédures décrites dans le présent document ne se justifie généralement pas pour les machines de puissance inférieure. Néanmoins, le présent document peut être utilisé pour de telles machines après accord entre l’acheteur et le fournisseur.

Peltonove vodne turbine - Prevzemni preskusi modela (IEC 63461:2024)

General Information

Status
Published
Publication Date
15-Aug-2024
ICS
27.140 - Hydraulic energy engineering
Technical Committee
CLC/SR 4 - Hydraulic turbines
Drafting Committee
IEC/TC 4 - IEC_TC_4
Current Stage
6060 - Document made available - Publishing
Start Date
16-Aug-2024
Due Date
28-Jun-2024
Completion Date
16-Aug-2024
Ref Project
SIST EN IEC 63461:2024 - Pelton hydraulic turbines - Model acceptance tests (IEC 63461:2024)

Relations

Replaces
EN IEC 60193:2019 - Hydraulic turbines, storage pumps and pump-turbines - Model acceptance tests
Effective Date
06-Aug-2024

Buy Standard

EN IEC 63461:2024EN IEC 63461:2024
PreviousNext
Standard
EN IEC 63461:2024
English language
174 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (Sample)


SLOVENSKI STANDARD
01-oktober-2024
Peltonove vodne turbine - Prevzemni preskusi modela (IEC 63461:2024)
Pelton hydraulic turbines - Model acceptance tests (IEC 63461:2024)
Hydraulische Pelton Turbinen - Modellabnahmeprüfungen (IEC 63461:2024)
Turbines hydrauliques Pelton - Essais de réception sur modèle (IEC 63461:2024)
Ta slovenski standard je istoveten z: EN IEC 63461:2024
ICS:
27.140 Vodna energija Hydraulic energy engineering
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN IEC 63461

NORME EUROPÉENNE
EUROPÄISCHE NORM August 2024
ICS 27.140 Supersedes EN IEC 60193:2019
English Version
Pelton hydraulic turbines - Model acceptance tests
(IEC 63461:2024)
Turbines Pelton - Essais de réception sur modèle Hydraulische Pelton Turbinen - Modellabnahmeprüfungen
(IEC 63461:2024) (IEC 63461:2024)
This European Standard was approved by CENELEC on 2024-08-02. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, the
Netherlands, Norway, Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Türkiye and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN IEC 63461:2024 E
European foreword
The text of document 4/460/CDV, future edition 1 of IEC 63461, prepared by IEC/TC 4 "Hydraulic
turbines" was submitted to the IEC-CENELEC parallel vote and approved by CENELEC as
The following dates are fixed:
• latest date by which the document has to be implemented at national (dop) 2025-05-02
level by publication of an identical national standard or by endorsement
• latest date by which the national standards conflicting with the (dow) 2027-08-02
document have to be withdrawn
This document supersedes EN IEC 60193:2019 and all of its amendments and corrigenda (if any).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC shall not be held responsible for identifying any or all such patent rights.
Any feedback and questions on this document should be directed to the users’ national committee. A
complete listing of these bodies can be found on the CENELEC website.
Endorsement notice
The text of the International Standard IEC 63461:2024 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following notes have to be added for the standard indicated:
IEC 60041:1991 NOTE Approved as EN 60041:1994
IEC 60609-1:2004 NOTE Approved as EN 60609-1:2005 (not modified)
IEC 60609-2:1997 NOTE Approved as EN 60609-2:1999 (not modified)
IEC 60994:1991 NOTE Approved as EN 60994:1992 (not modified)
ISO 4006:1991 NOTE Approved as EN 24006:1993 (not modified)
ISO 4373:2022 NOTE Approved as EN ISO 4373:2022 (not modified)
ISO 5167-1:2022 NOTE Approved as EN ISO 5167-1:2022 (not modified)
ISO 20456:2017 NOTE Approved as EN ISO 20456:2019 (not modified)
ISO 80000-4:2019 NOTE Approved as EN ISO 80000-4:2019 (not modified)
ISO 80000-11:2019 NOTE Approved as EN ISO 80000-11:2020 (not modified)
ISO 21920-2:2021 NOTE Approved as EN ISO 21920-2:2022 (not modified)
IEC 60609 series NOTE Approved as EN 60609 series
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments)
applies.
NOTE 1  Where an International Publication has been modified by common modifications, indicated by (mod),
the relevant EN/HD applies.
NOTE 2  Up-to-date information on the latest versions of the European Standards listed in this annex is available
here: www.cencenelec.eu.
Publication Year Title EN/HD Year
ISO 2186 2007 Fluid flow in closed conduits_- Connections - -
for pressure signal transmissions between
primary and secondary elements
ISO 2533 1975 Standard Atmosphere - -
ISO 4185 1980 Measurement of liquid flow in closed EN 24185 1993
conduits - Weighing method
- - + AC 1993
ISO 8316 1987 Measurement of liquid flow in closed EN ISO 8316 1995
conduits - Method by collection of the liquid
in a volumetric tank
IEC 63461 ®
Edition 1.0 2024-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Pelton hydraulic turbines – Model acceptance tests

Turbines Pelton – Essais de réception sur modèle

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 27.140  ISBN 978-2-8322-9236-5

– 2 – IEC 63461:2024 © IEC 2024
CONTENTS
FOREWORD . 9
1 Scope . 11
2 Normative references . 12
3 Terms, definitions, symbols and units . 12
3.1 General . 12
3.2 Terms and definitions. 12
3.3 Units . 14
3.4 Terms, definitions, symbols and units . 14
3.4.1 List by topics . 14
3.4.2 Subscripts and symbols . 15
3.4.3 Geometry . 16
3.4.4 Physical quantities and properties . 17
3.4.5 Discharge, velocity and speed . 18
3.4.6 Pressure . 18
3.4.7 Specific energy . 19
3.4.8 Height and head . 19
3.4.9 Power and torque . 20
3.4.10 Efficiency . 22
3.4.11 Fluctuating quantities . 22
3.4.12 Fluid dynamics and scaling . 25
3.4.13 Dimensionless terms and definitions . 25
3.4.14 Additional performance data . 26
4 Physical properties . 26
4.1 General . 26
4.2 Acceleration due to gravity . 26
4.3 Physical properties of water . 27
4.3.1 Density of water . 27
4.3.2 Kinematic viscosity . 30
4.3.3 Vapour pressure . 30
4.4 Physical conditions of atmosphere . 31
4.4.1 Density of dry air . 31
4.4.2 Ambient pressure . 31
4.5 Density of mercury . 31
5 Requirements of tests . 32
5.1 Requirement of test installation and model . 32
5.1.1 Choice of laboratory . 32
5.1.2 Test installation . 32
5.1.3 Model requirements . 33
5.2 Dimensional check of model and prototype . 35
5.2.1 General . 35
5.2.2 Explanation of terms used for model and prototype. 36
5.2.3 Purpose of dimensional checks. 36
5.2.4 General rules . 36
5.2.5 Procedure . 37
5.2.6 Methods . 38
5.2.7 Accuracy of measurements . 41
5.2.8 Dimensions of model and prototype to be checked . 41

IEC 63461:2024 © IEC 2024 – 3 –
5.2.9 Permissible maximum deviations in geometrical similarity between
prototype and model . 43
5.2.10 Surface waviness and roughness . 44
5.3 Test procedures . 46
5.3.1 Organization of tests. 46
5.3.2 Inspections and calibrations . 48
5.3.3 Execution of tests . 50
5.3.4 Faults and repetition of tests . 54
5.3.5 Preliminary test report . 55
5.3.6 Final test report . 55
6 Data acquisition . 55
6.1 Data acquisition and data processing . 55
6.1.1 General . 55
6.1.2 General requirements . 56
6.1.3 Data acquisition . 56
6.1.4 Component requirements . 58
6.1.5 Check of the data acquisition system . 61
6.2 Data acquisition and processing for measurement of fluctuating quantities . 63
6.2.1 General .
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

This May Also Interest You

CLC
EN IEC 63132-5:2023(Main)
Guidance for installation procedures and tolerances of hydroelectric machines - Part 5: Bulb turbines and generators
SIST EN IEC 63132-5:2023

The purpose of this guide is to establish, in a general way, suitable procedures and tolerances for the installation of bulb turbine and generator. This guide presents a typical assembly and whenever the words "turbine" and "generator" are used in this part, it refers to bulb turbine and generator. There are many possible ways to assemble a unit. The size of the machine, the design of the machine, the layout of the powerhouse, the sequence of concreting or the delivery schedule of the components are some of the elements that could result in additional steps, or the elimination of some steps and/or assembly sequences. It is understood that a publication of this type will be binding only if, and to the extent that, both contracting parties have agreed upon it. The guide excludes matters of purely commercial interest, except those inextricably bound up with the conduct of installation. It also excluded to specifications of the civil works but this aspect of the work should be taken into consideration during the assembly of the units. Wherever the guide specifies that documents, drawings or information is supplied by a manufacturer (or by manufacturers), each individual manufacturer will furnish the appropriate information for their own supply only.

  • Standard
    36 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 63132-6:2023(Main)
Guidance for installation procedures and tolerances of hydroelectric machines - Part 6: Vertical Pelton turbines
SIST EN IEC 63132-6:2023

IEC 63132-6:2023 is to establish, in a general way, suitable procedures and tolerances for the installation of Pelton vertical turbines. This document presents a typical assembly and whenever the word "turbine" is used in this document, it refers to a vertical Pelton turbine. There are many possible ways to assemble a unit. The size of the machine, the design of the machine, the layout of the powerhouse or the delivery schedule of the components are some of the elements that could result in additional steps, or the elimination of some steps and/or assembly sequences.

  • Standard
    28 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 63132-3:2020(Main)
Guidance for installation procedures and tolerances of hydroelectric machines - Part 3: Vertical Francis turbines or pump-turbines
SIST EN IEC 63132-3:2020

IEC 63132-3:2020: The purpose of this this part of IEC 63132 is to establish, in a general way, suitable procedures and tolerances for the installation of a vertical Francis turbine or pump-turbine. This document presents a typical assembly and whenever the word “turbine” is used in this document, it refers to a vertical Francis turbine or a pump-turbine. There are many possible ways to assemble a unit. The size of the machine, design of the machine, layout of the powerhouse or delivery schedule of the components are some of the elements that could result in additional steps, the elimination of some steps and/or assembly sequences. It is understood that a publication of this type will be binding only if, and to the extent that, both contracting parties have agreed upon it. This document excludes matters of purely commercial interest, except those inextricably bound up with the conduct of installation. The tolerances in this document have been established upon best practices and experience, although it is recognized that other standards specify different tolerances. Wherever this document specifies that documents, drawings or information is supplied by a manufacturer (or by manufacturers), each individual manufacturer will furnish the appropriate information for their own supply only.

  • Standard
    37 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 63132-4:2020(Main)
Guidance for installation procedures and tolerances of hydroelectric machines - Part 4: Vertical Kaplan or propeller turbines
SIST EN IEC 63132-4:2020

IEC 63132-4:2020 The purpose of this this part of IEC 63132 is to establish, in a general way, suitable procedures and tolerances for the installation of a vertical Kaplan or propeller turbine. This document presents a typical assembly and whenever the word “turbine” is used in this document, it refers to a vertical Kaplan or propeller turbine. There are many possible ways to assemble a unit. The size of the machine, design of the machine, layout of the powerhouse or delivery schedule of the components are some of the elements that could result in additional steps, the elimination of some steps and/or assembly sequences. It is understood that a publication of this type will be binding only if, and to the extent that, both contracting parties have agreed upon it. This document excludes matters of purely commercial interest, except those inextricably bound up with the conduct of installation. The tolerances in this document have been established upon best practices and experience, although it is recognized that other standards specify different tolerances. Wherever this document specifies that documents, drawings or information is supplied by a manufacturer (or by manufacturers), each individual manufacturer will furnish the appropriate information for their own supply only.

  • Standard
    38 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 63132-1:2020(Main)
Guidance for installation procedures and tolerances of hydroelectric machines - Part 1: General aspects
SIST EN IEC 63132-1:2020

IEC 63132-1:2020 The purpose of this part of IEC 63132 is to establish, in a general way, suitable procedures and tolerances for the installation of hydroelectric turbines and generators. This document presents a typical assembly. There are many possible ways to assemble a unit. The size of the machines, design of the machines, layout of the powerhouse and delivery schedule of the components are some of the elements that could result in additional steps, the elimination of some steps and/or assembly sequences. It is understood that a publication of this type will be binding only if, and to the extent that, both contracting parties have agreed upon it. Installations for refurbishment projects or for small hydro projects are not in the scope of this document. An agreement between all parties is necessary. This document excludes matters of purely commercial interest, except those inextricably bound up with the conduct of installation. The tolerances in this document have been established upon best practices and experience, although it is recognized that other standards specify different tolerances. Wherever this document specifies that documents, drawings or information is supplied by a manufacturer (or manufacturers), each individual manufacturer will furnish the appropriate information for their own supply only.

  • Standard
    28 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 63132-2:2020(Main)
Guidance for installation procedures and tolerances of hydroelectric machines - Part 2: Vertical generators
SIST EN IEC 63132-2:2020

IEC 63132-2:2020: The purpose of this this part of IEC 63132 is to establish, in a general way, suitable procedures and tolerances for installation of generator. This document presents a typical assembly. There are many possible ways to assemble a unit. The size of the machines, design of the machines, layout of the powerhouse or delivery schedule of the components are some of the elements that could result in additional steps, the elimination of some steps and/or assembly sequences. It is understood that a publication of this type will be binding only if, and to the extent that, both contracting parties have agreed upon it. This document excludes matters of purely commercial interest, except those inextricably bound up with the conduct of installation. This document applies to vertical generators according to IEC 60034-7. The tolerances in this document have been established upon best practices and experience, although it is recognized that other standards specify different tolerances. Brushless excitation system is not included in this document. Wherever this document specifies that documents, drawings or information is supplied by a manufacturer (or by manufacturers), each individual manufacturer will furnish the appropriate information for their own supply only.

  • Standard
    24 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 60193:2019(Main)
Hydraulic turbines, storage pumps and pump-turbines - Model acceptance tests
SIST EN IEC 60193:2019

This document applies to laboratory models of any type of impulse or reaction hydraulic turbine, storage pump or pump-turbine. This document applies to models of prototype machines either with unit power greater than 5 MW or with reference diameter greater than 3 m. Full application of the procedures herein prescribed is not generally justified for machines with smaller power and size. Nevertheless, this document may be used for such machines by agreement between the purchaser and the supplier. In this document, the term "turbine" includes a pump-turbine operating as a turbine and the term "pump" includes a pump-turbine operating as a pump. This document excludes all matters of purely commercial interest, except those inextricably bound up with the conduct of the tests. This document is concerned with neither the structural details of the machines nor the mechanical properties of their components, so long as these do not affect model performance or the relationship between model and prototype performances. This document covers the arrangements for model acceptance tests to be performed on hydraulic turbines, storage pumps and pump-turbines to determine if the main hydraulic performance contract guarantees (see 4.2) have been satisfied. It contains the rules governing test conduct and prescribes measures to be taken if any phase of the tests is disputed. The main objectives of this document are: - to define the terms and quantities used; - to specify methods of testing and of measuring the quantities involved, in order to ascertain the hydraulic performance of the model; - to specify the methods of computation of results and of comparison with guarantees; - to determine if the contract guarantees that fall within the scope of this document have been fulfilled; - to define the extent, content and structure of the final report. The guarantees can be given in one of the following ways: - guarantees for prototype hydraulic performance, computed from model test results considering scale effects; - guarantees for model hydraulic performance. Moreover, additional performance data (see 4.4) can be needed for the design or the operation of the prototype of the hydraulic machine. Contrary to the requirements of Clauses 4 to 6 related to main hydraulic performance, the information of these additional data given in Clause 7 is considered only as recommendation or guidance to the user (see 7.1). It is particularly recommended that model acceptance tests be performed if the expected field conditions for acceptance tests (see IEC 60041:1991) would not allow the verification of guarantees given for the prototype machine. A transposition method taking into account the model and prototype wall surface roughness for the performance conversion on pump-turbines, Francis turbines, and axial machines is described in IEC 62097. This method requires model and prototype surface roughness data and is takes into account the shift in nED, QED and PED factors for determining the transposition of efficiency between model and prototype. However, in the case of Francis machines with semispiral casing and axial machines, the transposition method has not been fully validated due to a lack of data. In addition, IEC 62097 does not apply to storage pumps, Pelton turbines, and Dériaz. Therefore, for these and otherwise specifically agreed upon cases where hydraulically smooth flow conditions are assumed on the model and the prototype, the transposition formula and procedure given in Annex D and Annex I can be applied. Applications and limitations of both this document and IEC 62097 transposition methods are discussed in Annex E. The method for performance conversion from model to prototype needs to be clearly defined in the main hydraulic performance contract.

  • Standard
    314 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 62097:2019(Main)
Hydraulic machines, radial and axial - Methodology for performance transposition from model to prototype
SIST EN IEC 62097:2019

IEC 62097:2019 establishes the prototype hydraulic machine efficiency from model test results, with consideration of scale effect including the effect of surface roughness. This document is intended to be used for the assessment of the results of contractual model tests of hydraulic machines. This second edition cancels and replaces the first edition published in 2009. This edition constitutes an editorial and technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) In introduction, clarifications have been brought such as addition of a sentence which declares the precedence of IEC 62097 over IEC 60193 if any mismatch is found between them b) In Clauses 3 and 4, corrections of the typographical errors c) In Clause 3: changes to be in accordance with presentation of the terms and structure of IEC 60193 (except for the water temperature) d) In Clause 4: – Deletion of the clause providing the direct step-up procedures for a whole turbine – Introduction of a global view by using turbine A and turbine B instead of model turbine, reference model turbine and prototype turbine – Move of section dealing with “surface roughness of model and prototype” in a new Clause 5 e) In Clause 5: – Introduction of additional chapters to answer comments raised at the CDV stage and to clarify the subject of surface roughness of model and prototype – Introduction of new tables for minimum recommended prototype roughness for new radial or diagonal machines and for new axial turbines – Addition of the explanation about roughness measurement of heavily rusted surface f) In Clause 7 (former Clause 6): – Introduction of a new subclause for clarifications about the assumed maximum hydraulic efficiency, hhAmax – Deletion of the requirement of mutual agreement for the application of the step-up formula for very high efficiency machines exceeding hhAmax – Clarifications of the equations from 22 to 33 by doubling the equations for suiting the “two step method g) In Clauses 6 and 7, correction of typographical errors h) In Clause 8 (former Clause 7), introduction of new figures for clarifying the “2 step” method and the alternative method i) In Annex A, modification of the flux diagram to be in compliance with IEC 60193 j) In Annex B: – Correction of the equation to obtain ΔECO – Deletion of the clause which describes the direct step-up procedures for radial flow machines k) In Annex C, deletion of the clause which describes the direct step-up procedures for axial flow machines l) In Annex D: – notes become main text – change of variable names in Subclause D.1 for clarifications m) Addition of Annex E, about comparison of IEC standards dealing with models: 60193 and 62097 n) In Annex F, clarifications of equations by adding more subscripts o) The Excel sheets attached to the standard are revised as itemized below – Deletion of the routine regarding the direct step-up procedures for a whole turbine – Deletion of the notice which requires mutual agreement when the step-up is applied to high efficiency machines exceeding hhAmax – Addition of the routine to process the normalization of test data ob

  • Standard
    129 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN IEC 62364:2019(Main)
Hydraulic machines - Guidelines for dealing with hydro-abrasive erosion in kaplan, francis and pelton turbines
SIST EN IEC 62364:2019

IEC 62364:2019 is available as IEC 62364:2019 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62364:2019 gives guidelines for: a) presenting data on hydro-abrasive erosion rates on several combinations of water quality, operating conditions, component materials, and component properties collected from a variety of hydro sites; b) developing guidelines for the methods of minimizing hydro-abrasive erosion by modifications to hydraulic design for clean water. These guidelines do not include details such as hydraulic profile shapes which are determined by the hydraulic design experts for a given site; c) developing guidelines based on “experience data” concerning the relative resistance of materials faced with hydro-abrasive erosion problems; d) developing guidelines concerning the maintainability of materials with high resistance to hydro-abrasive erosion and hardcoatings; e) developing guidelines on a recommended approach, which owners could and should take to ensure that specifications communicate the need for particular attention to this aspect of hydraulic design at their sites without establishing criteria which cannot be satisfied because the means are beyond the control of the manufacturers; f) developing guidelines concerning operation mode of the hydro turbines in water with particle materials to increase the operation life. It is assumed in this document that the water is not chemically aggressive. Since chemical aggressiveness is dependent upon so many possible chemical compositions, and the materials of the machine, it is beyond the scope of this document to address these issues. It is assumed in this document that cavitation is not present in the turbine. Cavitation and hydro-abrasive erosion can reinforce each other so that the resulting erosion is larger than the sum of cavitation erosion plus hydro-abrasive erosion. The quantitative relationship of the resulting hydro-abrasive erosion is not known and it is beyond the scope of this document to assess it, except to suggest that special efforts be made in the turbine design phase to minimize cavitation. Large solids (e.g. stones, wood, ice, metal objects, etc.) traveling with the water can impact turbine components and produce damage. This damage can in turn increase the flow turbulence thereby accelerating wear by both cavitation and hydro-abrasive erosion. Hydro-abrasive erosion resistant coatings can also be damaged locally by impact of large solids. It is beyond the scope of this document to address these issues. This document focuses mainly on hydroelectric powerplant equipment. Certain portions can also be applicable to other hydraulic machines. This second edition cancels and replaces the first edition published in 2013. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: a) the formula for TBO in Pelton reference model has been modified; b) the formula for calculating sampling interval has been modified; c) the chapter in hydro-abrasive erosion resistant coatings has been substantially modified; d) the annex with test data for hydro-abrasive erosion resistant materials has been removed; e) a simplified hydro-abrasive erosion evaluation has been added. Key words: Hydraulic Machines, Hydro-Abrasive Erosion, Kaplan, Francis, Pelton T

  • Standard
    75 pages
    English language
    sale 10% off
    e-Library read for
    1 day
CLC
EN 62256:2017(Main)
Hydraulic turbines, storage pumps and pump-turbines - Rehabilitation and performance improvement
SIST EN 62256:2017

NEW!IEC 62256:2017 is available as IEC 62256:2017 RLV which contains the International Standard and its Redline version, showing all changes of the technical content compared to the previous edition.IEC 62256:2017 covers turbines, storage pumps and pump-turbines of all sizes and of the following types: Francis; Kaplan; propeller; Pelton (turbines only) and bulb turbines. This document also identifies without detailed discussion, other powerhouse equipment that could affect or be affected by a turbine, storage pump, or pump-turbine rehabilitation. The object of this document is to assist in identifying, evaluating and executing rehabilitation and performance improvement projects for hydraulic turbines, storage pumps and pump-turbines. This document can be used by owners, consultants, and suppliers to define: needs and economics for rehabilitation and performance improvement; scope of work; specifications and evaluation of results. This document is intended to be: an aid in the decision process; an extensive source of information on rehabilitation; an identification of the key milestones in the rehabilitation process; and identification of the points to be addressed in the decision processes. This document is not intended to be a detailed engineering manual nor a maintenance document. This second edition cancels and replaces the first edition published in 2008. This edition constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: Tables 2 to 23 modified, completed and moved to Annex A; 7.3.2: subclauses moved with text changes; new subclauses on temperature, noise, galvanic corrosion, galling and replacement of components without assessment; 7.3.3: complete new subclause on residual life; Tables 29 to 32 moved to Annex C; New Annex B with assessment examples. Key words: Turbines, Storage pump, Pump turbines, Rehabilitation, Performance.

  • Standard
    160 pages
    English language
    sale 10% off
    e-Library read for
    1 day