Sep 2017
Gas Distribution
Hydrogen in natural gas – impact on gas engine CHP
Sep 2017
Sep 2018
Andy Lewis – Cadent Martin Brown - DNV GL
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Network Innovation Allowance
Gas Distribution Networks
The following high-level tasks are proposed:

  • Task 1: Market overview, focusing on equipment types installed in the UK,

  • Consultation with manufacturers and suppliers to understand range of equipment and control system options.

  • Collation of information from OEMs highlighting current understanding of hydrogen content limitations.

  • Task 2: Study on gas engine fuelled by hydrogen/natural gas

  • Install and commission the gas engine and associated test rig facilities.

  • Undertake benchmark, reference tests on the operation of a gas engine. The tests will establish the baseline response when operating on natural gas.

  • Perform tests on the gas engine with increasing hydrogen content of fuel gas. Measurements will be taken to develop the understanding of the impact on performance and emissions as the quantity of hydrogen is increased.

  • Detailed analysis of the test results

  • Task 3: Reporting of the impact of hydrogen on the results and output from the market overview and the technical study, to include:

  • performance of the engine with blends of natural gas and hydrogen in terms of efficiency/emissions/operability

  • an indication of the potential upper limit to hydrogen content of natural gas for use in gas engines.

  • Output from the discussions/meetings with OEMs – barriers, control system developments, component issues

Options for future developments that may be required to overcome any barriers

The key project objectives include:

  • Understand the range, size, type, mode of operation and control system of installed gas engines in the UK. This will include equipment for CHP and for stand-by power operation.
  • Produce data sets on the impact of hydrogen on gas engine operational performance
  • Develop knowledge on the impact of hydrogen content on the operation of the gas engine including overall efficiency, changes to emissions profiles, overall system operability.
  • Providing outline guidance on a potential hydrogen limit that should be considered regarding use of natural gas/hydrogen mixed fuels in gas engines
  • Outlining a high-level view on the reliability and impact on maintenance and replacement regimes if gas engines operate on natural gas/hydrogen mixed fuels for extended time periods.
  • Highlight any existing barriers to use of natural gas and hydrogen blends in gas engine and, through contact with OEMs, develop an understanding of future technology developments that may be needed to enable the use of “high” hydrogen blends.

The main aim is to characterise the impact of using natural gas/hydrogen fuel mixtures on the operation of gas engines used in CHP systems.

The output from this project will also inform the HyDeploy NIC project in relation to potential hydrogen content limits. The project will be presented at the IGEM Gas Quality Working Group (IGEM GQWG).

The success criteria for the project are:

Studying the real impact of hydrogen/natural gas blends on a gas-engine CHP system as an example of an I&C applications

Developing knowledge on the operation of a gas-engine CHP system to inform key stakeholders and assist in expanding the evidence base on which to evaluate options for future gas quality limits associated with hydrogen content of natural gas

Collation of responses from OEMs and trade associations regarding wider views on gas-engine CHP systems operating on hydrogen/natural gas blends, including potential equipment and control system developments