BS 17038-1-2019 Pumps – Methods of qualification and verification of the Energy Efficiency Index for rotodynamic pump units Part 1: General requirements and procedures for testing and calculation of Energy Efficiency Index (EEI).
5 Qualification of pump unit types in respect to their Energy Efficiency Index
5.1 General remarks
The qualification of a pump unit type in respect to the Energy Efficiency Index (EEl) is the responsibility of the company which places it on the market and/or puts it into service.
Product information on EEl of a pump unit type can either state the (legally) required EEl in the format EEI O.XX or can indicate a lower value “EEl O.YY if the pump unit type is qualified for that and the manufacturer decides so. EEl values shall be rounded to two decimal places.
5.2 Qualification methods
Generally, the method which is applied to determine the EEl-value in the frame of the qualification procedure is left to the company which is responsible.
In this document, two methods of qualification are described. Both methods result in a high probability of a successful verification:
1) Tests on complete pump units and evaluation of the test results to determine the EEl-value.
2) Determination of the EEl-value by applying a semi-analytical model of the complete pump unit.
These methods are described in detail in specific parts of this standard for the respective types of pump units.
1) In the case of qualification by tests on complete pump units the following procedure shall be applied:
To qualify a pump unit type for conformity to requirements by law with respect to the EEl-value. tests and evaluations shall be carried out by taking pump units randomly out of the pump unit population. From the result of measurements and evaluations, the mean value EElmean shall be determined (for example as described in Annex B). The pump unit type is then qualified for conformity to law i[the mean EEl-value determined as described above fulfils the condition
EElrnean < EEldeclared < EElaJIowabIe (3) where the value EElaIIowabJe is prescribed by law. EElmean is without any tolerance for the qualification procedure. In the verification procedure, according to Clause 6. a tolerance tEEI = 7 % is applied to the value of EEltest which results from verification tests. This tolerance is not part of the method to qualify a pump unit type by the supplier and shall not be applied on the result of the qualification procedure. 2) In the case of qualification by applying the semi-analytical models as described in other parts of Standard, the EEl-value resulting from the calculations (considering uncertainties of input values and model errors), taken as the mean value EElmean: — is used to qualify the pump unit type for conformity to law per Formula (3) — and can be indicated as numerical value with two digits after the decimal point on the nameplates and/or in the technical documentation. 6 Verification of the Energy Efficiency Index for pump units 6.1 General remarks The Indicated Energy Efficiency Index can be checked and confirmed by an independent institution, e.g. in the frame of market surveillance. This is called verification procedure in this document.BS 17038-1 pdf download.