IPHE regulations codes and standards working group – Type IV COPV round robin testing

• Published in: International journal of hydrogen energy 2017-03, Vol.42 (11), p.7275-7289
• Main Authors: Maes, M., Starritt, L., Zheng, J.Y., Ou, K., Keller, J.
• Format: Article
• Language: English
• Subjects: COPV; Cycle testing; Hydraulic; IPHE; Quality Assurance And Reliability; Stress testing; Type IV
• ISSN: 0360-3199; 1879-3487; 0360-3199
• DOI: 10.1016/j.ijhydene.2016.07.001

This manuscript presents the results of a multi-lateral international activity intended to understand how to execute a cycle stress test as specified in a chosen standard (GTR, SAE, ISO, EIHP …). The purpose of this work was to establish a harmonized test method protocol to ensure that the same results would be achieved regardless of the testing facility. It was found that accurate temperature measurement of the working fluid is necessary to ensure the test conditions remain within the tolerances specified. Continuous operation is possible with adequate cooling of the working fluid but this becomes more demanding if the cycle frequency increases. Recommendations for future test system design and operation are presented. •Identified which temperature measurements were critical to successfully perform this test.•The higher the cycle rate the faster the temperature rise of the working fluid.•Temperature rise on a per cycle basis appears to be roughly constant.•A pass thru configuration with an appropriately sized heat exchanger can enable continuous operation.•Without adequate temperature control the tests need to be paused to allow the system to cool.