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Topic: Dual Fuel

Article

Mainspring: ammonia-fed, “linear” power generators

By on July 06, 2022
US-based Mainspring Energy has announced successful testing of pure ammonia fuel in its Linear Generator technology. Running on pure (anhydrous) ammonia, the overall system efficiency was 1% higher than conventional gas fuels, and Mainspring indicates that “off-the-shelf” technology available for current gas turbine models can yield NOx emissions that “meet any permitting standard”. Mainspring aims for its product to displace diesel-powered backup generators in a variety of applications.

Article

Ammonia-powered vessels & maritime engines: development updates

By on June 30, 2022

This week we explore four announcements in the maritime ammonia space:

  • Færder Tankers Norway will receive $20 million in Enova funding to develop two ammonia-powered vessel designs: a tanker and a car carrier.
  • Mitsubishi Shipbuilding has completed a conceptual design for an LPG-ammonia dual-fuel VLGC, with Approval in Principle granted by ClassNK.
  • Delivery dates have been set for the first eight of Höegh Autoliners’ Aurora-class, ammonia-powered car carriers, with China Merchants Heavy Industry to deliver vessels from late 2024.
  • WinGD and Hyundai Heavy Industries will collaborate to deliver the first WinGD two-stroke engine capable of running on ammonia by 2025.

Article

Dual-fuel ammonia for power generation in South Korea

By on June 30, 2022
Doosan, KEPCO and Samsung will join forces to jointly develop a “dual-fuel green ammonia” power generation model that can be rolled out to 1 GW power plants in South Korea. In the trio, Doosan is charged with the development of ammonia dual-fuel boilers, indicating that coal co-firing is the target of the model rollout. As part of a different agreement, Doosan is also involved in ammonia-hydrogen gas turbine development with POSCO and KEPCO.

Article

New ammonia-powered vessels: Newcastlemax & Panamax class

By on January 23, 2022
Rio Tinto and AngloEastern have announced they will develop Newcastlemax class, ammonia-powered bulk carriers. The dry cargo vessels will be the maximum size allowed to dock in the Port of Newcastle, Australia: an important coal & iron ore port in global maritime trade. Both AngloEastern and Rio Tinto are members of an Itochu-led maritime fuel study investigating the use of ammonia. In Japan, a "greener ships" consortium has produced its first-ever ammonia-powered design: a Panamax-class bulk carrier. And the China State Shipbuilding Corporation will develop two 93,000 m3 ammonia-powered ammonia carrier vessels, with Bureau Veritas granting AiP for the vessel design.

Article

Ammonia combustion analysis: powertrains, turbines & power generation

By on December 08, 2021

This week we explore four updates in ammonia combustion R&D:

1. A team from the University of Cambridge has shown merchant vessels are the strongest candidates for conversion to run on ammonia powertrains, with cargo capacity losses of 4-9% able to be feasibly offset by operators.

2. Researchers at the University of Minnesota have successfully tested a thermochemical recuperation (TCR) reactor to improve the efficiency of a dual-fuel, diesel-ammonia compression ignition engine by minimising ammonia slip.

3. A global team led by Cardiff University researchers has revealed some of the inner workings of ammonia combustion in gas turbine flames.

4. A global team has produced a cradle-to-gate environmental assessment for ammonia production and ammonia-based electricity generation, suggesting that renewable and nuclear ammonia have a significant role to play in decarbonising the power sector.

Article

WinGD to develop ammonia maritime engines by 2025

By on December 08, 2021
Swiss-based engine developer WinGD has announced that its current portfolio of low-speed maritime engines will be ready to operate on methanol and ammonia by 2024 and 2025 respectively. Although WinGD's diesel-fueled X Engine series will require retrofits, the X-DF Engine series is already designed to run on biogas and will not require major modifications to run on methanol or ammonia.

Article

Kawasaki Heavy’s LPG/ammonia carrier in demand

By on December 08, 2021
Kawasaki Heavy Industry's 86,700 m3, LPG and "liquefied ammonia gas" (LAG) carrier has been ordered for the fifth time in 2021. K Line, Eneos (two vessels) and now NYK (also two vessels) will take delivery of the VLGCs from KHI's Sakaide shipyards in 2023 (K Line and Eneos), and 2024 (NYK). The flexibility of the dual-purpose LPG/ammonia carrier is key to its newfound popularity.

Paper

Impact of ammonia as a fuel / co-fuel on NOx emissions

By , and on November 10, 2021
Ammonia is a hydrogen-based, carbon-free energy carrier. It has good energy density (22.5 MJ/kg) and can be liquefied (about 10 bar at 298 K). With the increasing demand to lower the CO2 emissions worldwide, pure ammonia combustion or co-combustion with a conventional fuel is an alternative solution in turbines, gas engines, power plants, furnaces, and cement kilns. The major challenges with the use of ammonia as a fuel are lowered heat flux and increased NOx emissions. These parameters were analyzed in Linde’s lab-scale tests with pure ammonia as well as mixtures of ammonia and natural gas. Tests were conducted with…

Paper

Development of Low-NOx Combustor of Micro Gas Turbine Firing Ammonia Gas

By , , , , , , , , , and on October 31, 2018
A massive influx of renewable energy is required in order to mitigate global warming. Although hydrogen is a renewable media, its storage and transportation in large quantity is difficult. Ammonia, however, is a hydrogen energy carrier, and its storage and transportation technology is already established. Although ammonia fuel combustion was studied in the 1960s in the USA, the development of an ammonia fuel gas turbine had been abandoned because combustion efficiency was unacceptably low [1]. Recent demand for hydrogen energy carrier revives the usage of ammonia fuel. The National Institute of Advanced Industrial Science and Technology (AIST) in Japan, in…

Paper

Effects of the Thickness of the Burner Rim, the Velocities of Fuel and Air on Extinction Limit of Ammonia Coaxial Jet Diffusion Flame

By , , , , , , and on November 1, 2017
Ammonia is regarded as one of the alternative fuels because CO2 doesn’t emit during the combustion process of ammonia. Ammonia also has advantages in storage and transportation. In addition, ammonia has a potential to be a “hydrogen carrier” because of high amount of hydrogen content. However, there are several combustion related problems such as the low flammability, the low radiative power and the high NOx formation. To use ammonia as a fuel, therefore, it is necessary to understand the fundamental phenomena of the combustibility of the ammonia such as laminar burning velocity, strength of the radiation and extinction limit. Since…
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