This recommended practice is intended to provide a framework for performance testing of fuel cell systems (FCS's) designed for automotive applications with direct current (DC) output. The procedures described allow for measurement of performance relative to claims by manufacturers of such systems with regard to the following performance criteria.
Since this recommended practice is based on the principal of performance measurement relative to a claim, the testing parties should take care to include any qualifying or unique circumstances leading to the test results reported in order to achieve full disclosure. For example, efficiency as defined in section 3.1.9 allows for the inclusion of thermal output benefit. If a test result is reported which takes advantage of this allowance this stipulation should be noted with the efficiency figure and the useful purpose of the thermal output (e.g. cabin heating) should be made clear.
Integrating FCS's into a vehicle requires the, (1) alignment of interface and environmental conditions between each, as well as (2) an understanding about the system's performance capabilities. Inherently linked by the FCS design, both (1) & (2) are commonly manipulated to produce data-based performance comparisons. This document is intended to aid in the comparison of competing FCS designs by providing a common recommended practice for performance testing. In doing so, this document will define performance measurements relative to manufacture claims and provides a format for recording test conditions.