BS EN 16480:2016
$215.11
Pumps. Minimum required efficiency of rotodynamic water pumps
| Published By | Publication Date | Number of Pages |
| BSI | 2016 | 78 |
This European Standard specifies performance requirements (methods and procedures for testing and calculating) for determining the Minimum Efficiency Index (MEI) of rotodynamic glanded water pumps for pumping clean water, including where integrated in other products.
The pump types and sizes covered by this standard are described in the Annex A. These pumps are designed and produced as duty pumps for pressures up to 16 bar for end suction pumps and up to 25 bar for multistage pumps, temperatures between -10 °C and +120 °C and 4” or 6” size for submersible multistage pumps at operating temperatures within a range of 0 °C and 90 °C.
In addition, this standard specifies how the value of the Minimum Efficiency Index (MEI) of a pump size indicated by the manufacturer can be checked by market surveillance.
Even if it is left free to the manufacturer of a pump size how to prove the rated value of the Minimum Efficiency Index (MEI), nevertheless this standard specifies a method to prove that this rated value meets the requirements within the confidence intervals with a sufficiently high probability.
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PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | Contents Page |
| 6 | European foreword |
| 7 | Introduction |
| 9 | 1 Scope Figure 1 — Scheme of application of this standard |
| 10 | 2 Normative references 3 Terms and definitions 3.1 General 3.2 List of quantities with definitions |
| 12 | 3.3 Lists of basic letters and subscripts Table 1 — Alphabetical list of basic letters used as symbols |
| 13 | Table 2 — List of letters and figures used as subscripts |
| 14 | 3.4 General definitions |
| 16 | 4 Minimum Required Efficiencies and Minimum Efficiency Index 4.1 The concept of “house of efficiency” |
| 17 | Figure 2 — ‘House of Efficiency’ – explanatory representation 4.2 Mathematical representation of minimum required efficiency |
| 18 | 4.3 Minimum efficiency at part load and overload |
| 19 | 4.4 Minimum Efficiency Index Table 3 — Values of the constant C for different values of the Minimum Efficiency Index (MEI) |
| 20 | Figure 3 — Two-dimensional representation of ηBEP = f (ns,QBEP) for ESOB, n= 2 900 min-1 and MEI = 0,70 (see Table 3) |
| 21 | Figure 4 — ηBEP = f (ns) for ESOB with QBEP = 32 m³/h, 2 900 min-1 and for different values of MEI (see Table 3) |
| 22 | 5 Determination of the Efficiency of a Test Pump 5.1 General 5.2 Test Procedures |
| 23 | 5.3 Test conditions |
| 24 | 5.4 Measuring uncertainties 5.4.1 Relevance 5.4.2 Fluctuations |
| 25 | Table 4 — Permissible amplitude of fluctuation as a percentage of mean value of quantity being measured 5.4.3 Statistical evaluation of overall measurement uncertainty 5.4.4 Maximum permissible measurement device (systematic) uncertainty 5.4.4.1 General Table 5 — Maximum permissible measurement device uncertainty es,max as a percentage of the arithmetically averaged value of the measured quantity |
| 26 | 5.4.4.2 The overall uncertainty Table 6 — Permissible values of overall uncertainties 5.4.4.3 Determination of overall uncertainty of efficiency Table 7 — Resulting largest values of the overall uncertainties of efficiency 5.5 Evaluation of test data 5.5.1 Conversion of the test results to the nominal speed of rotation or to the nominal electric frequency |
| 27 | 5.5.2 Performance curves |
| 29 | Figure 5 — Performance curves with values relevant for the qualification or verification |
| 30 | 5.5.3 Determination of the values relevant for the qualification or verification 5.5.4 Procedures for testing and/or evaluation of special pump types 5.5.4.1 General 5.5.4.2 Other nominal speeds than 1 450 min-1 or 2 900 min-1 |
| 31 | 5.5.4.3 Twin head pumps (ESCCi with two impellers) 5.5.4.4 Pumps according to more than one type definition 6 Proving the Minimum Efficiency Index of a pump size 6.1 General remarks |
| 32 | 6.2 Determination of the Minimum Efficiency Index of a pump size |
| 33 | 7 Verification of the Minimum Efficiency Index for a pump size 7.1 General remarks 7.2 Procedure and decision |
| 36 | Figure 6 — Schematic presentation of “pass” (left figure) and “fail” (right figure) results of a test pump for a certain value of the Minimum Efficiency Index (MEI) |
| 37 | Annex A (normative) Pump types in scope Table A.1 — Pump types within the scope |
| 38 | Table A.2 — Pumps within the scope |
| 39 | Annex B (informative) General remarks on the efficiency of rotodynamic pumps |
| 40 | Figure B.1 |
| 41 | Annex C (informative) Mean Values of a Size Relevant for its Minimum Efficiency Index |
| 42 | Figure C.1 — Normal distribution of a quantity x within a pump size resulting from manufacturing tolerances |
| 44 | Figure C.2 — Effect of total tolerances of measured efficiencies, case 1 |
| 45 | Figure C.3 — Effect of total tolerances of measured efficiencies, case 2 |
| 46 | Annex D (informative) Methods recommended for manufacturers to determine the mean values of hydraulic quantities of a size relevant for MEI D.1 General remarks D.2 Determination of the mean efficiency of a pump size from a test on one single test pump |
| 48 | Figure D.1 — Graphical presentation of mean efficiencies relevant for the Minimum Efficiency Index (MEI) of a pump size D.3 Determination of the mean efficiency of a pump size from a sample of M test pumps |
| 51 | Annex E (informative) Numerical example Table E.1 — “True efficiency values” of sample pumps |
| 52 | Table E.2 — “Measured values” of sample pumps Table E.3 — “Calculation of measured values” of sample pumps |
| 53 | Table E.4 — 95 % confidence intervals of mean efficiency resulting from tests on a single pump |
| 54 | Figure E.1 — Comparison of confidence intervals of mean efficiency |
| 55 | Table E.5 — Relevant values and results in respect to qualification of the size |
| 56 | Annex F (informative) Application of mathematical statistics on tests F.1 Purposes of applying statistics in the frame of qualification and verification |
| 57 | F.2 Confidence interval |
| 58 | Table F.1 — Values of Student`s factor for two sided probability 95 % (single sided with 97,5%) |
| 59 | Table F.2 — Maximum permissible values of ratio R (two sided 95%) F.3 Law of error propagation F.4 Numerical example |
| 60 | Table F.3 — “True efficiency values” of sample pumps |
| 61 | Table F.4 — “Measured values” of sample pumps — Table F.5 — “Calculation of measured values” of sample pumps |
| 62 | Table F.6 — 95 % confidence intervals of mean efficiency resulting from tests on a single pump |
| 63 | Figure F.1 — Comparison of confidence intervals of mean efficiency resulting from application of different methods |
| 64 | Table F.7 — Relevant values and results in respect to qualification of the size Table F.8 — Relevant values and results in respect to verification of the size |
| 66 | Annex G (informative) Measurement uncertainties G.1 General remarks |
| 68 | G.2 Determination of the overall measurement uncertainty of efficiency |
| 70 | Annex H (informative) Explanations concerning the methodology of the verification procedure and the probability of the results |
| 71 | Figure H.1 — Probability of individual efficiency within a size |
| 73 | Annex I (informative) Reporting of Test Results I.1 Test Report Requirements I.2 Pump test sheet |
| 74 | Table I.1 — Test report I |
| 75 | Annex ZA (informative) Relationship between this European Standard and the Essential Requirements of EU Directive 2009/125/EC, establishing a framework for the setting of ecodesign requirements of energy related products and implemented by the Europ… Table ZA.1 — Correspondence between this European Standard and the EU-regulation 547/2012 |
| 76 | Bibliography |
