Pre-Normative Research on Hydrogen Releases Assessment (NHyRa,

价值链释放了多少氢气（H2） ？要回答这个问题是非常具有挑战性的，因为文献中没有足够的标准化数据，即使有，也找不到。然而，对于氢气价值链对气候变化的影响进行任何可信的、经过科学验证的研究，填补这一知识差距是至关重要的。文献中充满了调查和计算氢气泄漏风险的研究，在故障，事故和紧急情况下。但是，关于H2价值链中（大气中）人为H2的数量，存在着重大的知识空白。研究团体需要通过改进量化小版本和大版本的能力来解决这个问题，交付用于测量或计算它们的经过验证的方法和技术。需要尽快建立一个被普遍接受和开放获取的清单。同样，利益相关者也要求一个易于使用的开放获取和易于理解的工具，以便更好地量化整个H2价值链的泄漏，同时，高端H2能源应用的势头正在迅速聚集。NHyRA项目是专门为解决这些迫切需求而设计的。该项目将提供“H2释放”清单，作为科学界和工业界的参考。新的或充分适应的实验、理论和模拟方法将被验证，以执行实验室或现场测量，以实现雄心勃勃的目标。该联盟的合作伙伴还将对氢气价值链的最关键要素进行实验测试。将制定中期（2030年）和长期（2050年）H2释放情景的完整图景，使决策者能够确定并优先考虑有效的缓解行动。最后，该项目将为标准和技术规范制定建议。

How much hydrogen (H2) is released from the value chain? To answer the question is very challenging since insufficient and, when available, no standardized data can be found in the literature. However, it is essential to cover this knowledge gap to perform any credible and scientifically validated research regarding the H2 value chain impact on the climate change. The literature is full of studies investigating and calculating the risk of H2 leakages in case of failures, accidents, and emergencies. But significant knowledge gaps exist about the amount of anthropogenic H2 (in the atmosphere) from the H2 value chain. The research community needs to address this by improving the capability to quantify small and large releases, delivering validated methodologies and techniques for measuring or calculating them. A universally accepted and open-access inventory is needed as soon as possible. Likewise, an open access and comprehensible tool that is easy to be used is also asked by the stakeholders to better quantify the leaks from the whole in H2 value chain while the momentum is fast gathering to upscale H2 energy applications. The NHyRA project is specifically designed to address these urgent needs. The project will deliver a "H2 releases" inventory to serve as a reference for the scientific and industrial community. New or adequately adapted experimental, theoretical, and simulation methodologies will be validated to perform laboratory or in-field measurements to achieve the ambitious goal. Experimental tests will also be performed on the most critical elements of the H2 value chains by the partners of the Consortium. A complete picture of the H2 releases' scenarios in the middle (2030) and long (2050) term will be developed to enable decision-makers to identify and prioritize effective mitigation actions. And finally, the project will formulate recommendations for Standards and Technical Specifications.