D1C.6 Development of 100%-hydrogen compatible domestic components (NL + EN version)

Research is being carried out within the framework of the national HyDelta research programme with the aim of removing barriers to hydrogen projects. Work package 1C of HyDelta deals with main pipelines, connecting pipes, gas meter installations and indoor installations. A range of research questions have been drawn up in order to investigate these topics more in-depth. See Appendix I. The research question discussed in this report (question 61) is as follows: How do the developments align for all the components that are suitable for 100% hydrogen in the distribution network (including connections), for indoor installations and for gas burning appliances behind the meter so that the entire chain is coordinated? Here, the focus is on developments in materials for indoor installations and gas burning appliances. In order to answer sub-question 61, a questionnaire was compiled for the purposes of conducting interviews, which was coordinated with the Expert and Assessment Group (EAG). These interview questions relate to regulations and the certification process, as well as to manufacturer developments and to experiences gained during pilot projects. The total number of 26 interviews conducted indicated the following: At the moment, the components behind the gas meter have not yet been fully adapted for use with 100% hydrogen. However, manufacturers and regulatory bodies are actively working on this issue. Existing installations cannot be converted one-to-one to 100% hydrogen for the following reasons: Existing natural gas appliances are not suitable for hydrogen from a technical and regulatory standpoint. Existing flue gas systems may not all be suitable. Suitability must first be demonstrated by a party that is willing and able to take on responsibility for this. Existing indoor pipes may not all be suitable. Here too, suitability must first be demonstrated by a party that is willing and able to take on responsibility. For new installations, the following materials have been or will be used in pilot projects: Combi boilers (appliances for both central heating and domestic hot water), field test version; also cooking hobs and fireplaces in the United Kingdom. Flue gas systems: with a self-declaration from the manufacturer Pipe materials: only with Gastec QA mark for natural gas. In the near future, several manufacturers will introduce the following products to the (consumer) market: Pipe systems suitable for hydrogen with the Gastec QA mark (from 2022). The QA quality mark will be accompanied by the text: “Hydrogen ready according to AR 214” or in Dutch “Bestand tegen waterstofgas volgens KE 214” Combi boilers suitable for hydrogen with CE marking (from 2023). These hydrogen appliances are not approved for operation on natural gas, not even for just a few seconds. That means that when switching from natural gas to hydrogen, the last remaining litres of natural gas also have to be removed from the pipeline. However, H2 ready appliances are being developed. These are suitable for natural gas and are easy to convert to hydrogen.Dit project is medegefinancierd door TKI Nieuw Gas | Topsector Energie uit de PPS-toeslag onder referentienummer TKI2020-HyDelta