...Alessandro de Cataldo; Marco Astolfi; Paolo Chiesa; Stefano Campanari; Emanuele Martelli; Paolo Silva; Stefano Bedogni; Luca Ottolina; Marco Tappani; Matteo C. Romano This study investigates the potential of “Powdrogen” plants for blue hydrogen and decarbonized electric power production, conceived...

...Hannes Laget; Peter Griebel; Luc Gooren; Fabian Hampp; Nicolas Jouret; Oliver Lammel Hydrogen cofiring in a gas turbine is believed to cover an energy transition pathway with green hydrogen as a driver to lower the carbon footprint of existing thermal power generation or cogeneration plants through...

... upgradation techniques are limited by higher fuel costs, and strenuous modifications would be required for improving engine physical parameters. In this study, experimental investigations were performed with hydrogen-enriched biogas to enhance low operating load limit and engine characteristics...

... reproduce the experiments within 20% for all the conditions considered in the study. We also investigate the effect of hydrogen addition to the auto-ignition of these NG blends using NUIGMech1.2, which has been validated against the existing literature for natural gas/hydrogen blends. The results...

... media-gap motor. Additionally, it includes a droplet separator to eliminate liquid water from the anode loop. The aerodynamic design is based on one-dimensional-correlations and three-dimensional-numerical CFD simulations. Different gas compositions of hydrogen, nitrogen, and water vapor are considered...

...David Noble; David Wu; Benjamin Emerson; Scott Sheppard; Tim Lieuwen; Leonard Angello A confluence of technology development, policy support, and industry investment trends is accelerating the pace of Hydrogen (H 2 ) technology demonstrations, increasing the likelihood of power sector impacts...

...Jiabo Zhang; Anhao Zhong; Zhen Huang; Dong Han A theoretical analysis based on the second law of thermodynamics was conducted for the ammonia/hydrogen/air premixed flames at different initial pressures. The irreversibility causing exergy losses in premixed flames was divided into five parts, namely...

... hydrogen fuel momentum swirl stabilized burner flame stabilization To a large extent, the development of gas turbine combustors is driven by the reduction of the nitrogen oxide (NO x ) emissions in the entire load range. This requires the improvement of the fuel-air mixing in the burner at high...

.... The equation system and the method to solve it are described in Sec. 3. 4 . Different figures of merit for assessing the system efficiency are also commented. The different circulating mass flows are the hydrogen mass flow ( m · H ), the oxygen mass flow ( m · O...

... to oscillations, flashback, or extinction, thereby limiting the potential range of lean combustion application. Recent interest in integrated gasification combined cycle plants and syngas combustion requires an improved understanding of the role of hydrogen on the combustion process. Therefore, in the present...

... study, autoignition characteristics for hydrogen, diluted with up to 30 vol. % nitrogen, were investigated at conditions relevant to reheat combustor operation (p = 15 bar, T >1000 K, hot flue gas, relevant residence times). The experiments were performed in a generic, optically accessible reheat...

... zone makes LP type of combustors a candidate for upstream flame propagation (i.e., flashback) in the premixer that is typically not designed to sustain high temperatures. Moreover, there has been a recent demand for fuel-flexible gas turbines that can operate on hydrogen-enriched fuels like Syngas...

...B. B. Sahoo; U. K. Saha; N. Sahoo Syngas, an environmentally friendly alternative gaseous fuel for internal combustion engine operation, mainly consists of carbon monoxide (CO) and hydrogen (H 2 ). It can substitute fossil diesel oil in a compression ignition diesel engine through dual fuel...

... can lead to serious reliability problems in gas turbine engines caused by the different physical and chemical properties of these gases. A new innovative approach to reach efficient, safe, and low-emission operation for fuels such as natural gas, syntheses gas, and hydrogen with the same burner...

...Niall R. McGlashan; Peter R. N. Childs; Andrew L. Heyes A combined cycle gas-turbine generating power and hydrogen is proposed and evaluated. The cycle embodies chemical looping combustion (CLC) and uses a Na based oxygen carrier. In operation, a stoichiometric excess of liquid Na is injected...

...Christian Eichler; Thomas Sattelmayer Premixed combustion of hydrogen-rich mixtures involves the risk of flame flashback through wall boundary layers. For laminar flow conditions, the flashback mechanism is well understood and is usually correlated by a critical velocity gradient at the wall...

... were obtained of hydrogen/methane flames. Supporting calculations of extinction strain rates were also performed using detailed kinetics. It is shown that flames become unsteady (or local extinctions happen) at a nearly constant extinction strain rate for different hydrogen/methane mixtures. Based upon...

...Dung Ngoc Nguyen; Hiroaki Ishida; Masahiro Shioji Gaseous fuels, such as hydrogen and natural gas, are utilized in internal combustion engines for spark-ignition operation. To improve thermal efficiency and to ensure control at good heat-release rates, combustion systems with direct-injection...

..., “An Updated Comprehensive Kinetic Model of Hydrogen Combustion,” Int. J. Chem. Kinet., 36, pp. 566–575) ). Sensitivity of the measurements to uncertainties in boundary conditions, e.g., wall temperature and nozzle velocity profile (plug or potential), is investigated through detailed numerical simulations...

... , H 2 S , and unpermeated H 2 . 10 05 2006 31 05 2007 28 03 2008 coal heat exchangers heat recovery hydrogen quenching (thermal) separation Concern about global climate change has prompted significant new research on low carbon energy systems. One...