CIMAC WG17 | Guideline - Hydrogen in Stationary 4-Stroke Gas Engines for Power Generation

The CIMAC Guideline ‘Hydrogen in Stationary 4-Stroke Gas Engines for Power Generation’ has been compiled by the CIMAC WG17 'Gas Engines' members and describes influence on gas engine operation, controls and hardware during operation on hydrogen/natural gas blends up to pure hydrogen. This usage of hydrogen as fuel is becoming increasingly important as energy is stored in chemical form as hydrogen when renewable energy is in oversupply. Furthermore, using hydrogen blends up to pure hydrogen in reciprocating engines is seen as a key enabler of energy decarbonization.

This guideline focuses on land-based stationary power generation 4-stroke gas engines. Marine applications, gas compression, and other non-road mobile machinery are out of the present scope. The publication can be downloaded from the below link or on the right hand side.

Download Publication [PDF]



CIMAC WG7 IRSG US Gulf Statement 2024
In 2023, mainly during the period between March and July, an uncharacteristic number of operational engine issues were reported to have occurred after consumption of Very Low Sulphur Fuel Oils .. more
CIMAC WG 7 Fuels | ISO 8217:2024 - FAQ
In 2024, a new edition of ISO 8217 (edition seven) has been published. In the absence of an in-depth discussion of the various reports and associated background documentation that helped form the .. more
CIMAC WG7 | Statement - 2018 Fuel Incidents
In 2018, the industry experienced a series of marine fuel incidents impacting the operation of more than 100 vessels. The specialists of CIMAC WG7 Fuels have prepared a statement .. more
CIMAC WG07 | Guideline - ISO 8217:2017 FAQ
The CIMAC Working Group 7 Fuels has prepared and issued a guideline to provide answers to the questions that may arise with the publication of ISO 8217:2017, the latest specification of .. more
CIMAC WG07 | Questionnaire
This document intends to collect information about the situations experienced where the Ignition and Combustion properties of the fuel are suspected of having influenced negatively on the .. more
CIMAC WG05 | Emission Calculation Check Guide
On 10 October 2008, the IMO Marine Environment Protection Committee at its 58th session, by Resolution MEPC.177(58), has adopted amendments to the Technical Code on Control of Emission of Nitrogen .. more
CIMAC WG05 | Statement EPA NPRM
Control of Emissions of Air pollution from Locomotive Engines and Marine compression-ignition engines less then 30 litres per cylinder. This publication discusses the following issues: .. more
CIMAC WG02 | Proposal IACS Attendance TAT
Subject: Attendance at Type Approval Tests (TAT) Background: Within the last years quite some experience was gained during Type Approval Tests. We have realized that Class surveyors well attended .. more
CIMAC WG07 | Statement EPA CARB
Use of low sulphur diesel fuels in coastal waters. CARB / EPA propose that Ocean going ships must use only distillate fuels (diesel oil) with a low sulphur content and a low content of aromatic .. more