This 3rd deliverable from work package 2 is organised in the following way

  • the first part introduces the basics of various gas combustion technologies and their implementation in domestic and small-scale commercial appliances. The functional principles are explained and shown graphically, technology by technology. The focus is on aspects that are crucial for the influence of hydrogen admixture to natural gas, which will be discussed at the end of every subchapter.
  • In a second part, a systematic literature review is presented to gather the available information on the topic from literature and to disentangle what is known and what is so far unknown concerning the impact of hydrogen on the various appliance types in the market. Amongst other, available knowledge on CO and NOx formation, overheating, flame temperature, flashback, H2 leakage, operational implications and efficiency of appliances supplied with H2NG blends are presented