Round Robin Air Compressors
The available ISO1217 standard (compressor acceptance test) is a general test standard which covers a very wide range of gas compressors. The standard shows some shortfalls, which makes it difficult for test laboratories to provide closely aligned testing results.
To address this, EMSA conducted an international round robin testing programme, exchanging two commercial, packaged electric motor-driven screw compressors between three laboratories worldwide. The results of the round robin, together with a practical guide for measuring specific energy and isentropic efficiency of packaged air compressors in line with ISO 1217:2009 and Amendment 1:2016, are available in the report published by EMSA.
An Excel-based calculation tool, the EMSA CompressorCalc, was also developed to perform the stepwise calculation of air compressor isentropic efficiency based on test results as specified in ISO 1217 Annex C and Amendment 1.
With this, EMSA intends to contribute toward more transparent, comparable, and robust compressor efficiency testing worldwide.
Round Robin for Variable Speed Drives
EMSA in cooperation with the International Electrotechnical Commission (IEC) launched the project to determine whether the current energy efficiency test methods provide accurate and repeatable results and if the level of reference losses described in these provide a sufficient incentive to encourage greater levels of efficiency. The test method to determine the losses in variable speed drives (and hence their efficiency) is described in the following two IEC standards: IEC 61800-9-2:2017 and IEC 60034-2-3:2020.
In this EMSA organised international Round Robin, independent testing laboratories in Australia, Denmark, Switzerland and the USA were involved and funded by EMSA members.
Key findings:
- Almost all Variable Speed Drives on the market easily reach IE2
- The Round Robin test results show a good match with manufacturers’ catalogue data
- The Uniform Testing Protocol of the Round Robin has proven to be a valuable test method and was taken up into IEC 61800-9-2
Test standards for selected advanced motor technologies
This project & document identifies existing test standards for selected advanced motor technologies and discusses opportunities for potential test procedure harmonisation for each categories of equipment analysed.
