Results 1 to 10 of about 14,148 (264)

Effects of Hydrogen Blending Ratio and Equivalence Ratio on the Dynamic Characteristics of Deflagration Shock Waves of CH₄/H₂ Mixtures. [PDF]

ACS Omega
To evaluate the explosion hazard of CH4/H2 mixtures, experiments were conducted in a long and closed pipeline with a length-to-diameter ratio of 51 and built-in obstacles, and the characteristic parameters of deflagration shock waves were analyzed under different hydrogen blending ratios (0 ≤ λ ≤ 100%) and equivalence ratios (0.5 ≤ Φ ≤ 3).
Liu Q, Liu Z, Peng S, Liu C, Liu C, Liu L, Zhou R, Zhi S, Fan T, Li P.   +9 more
europepmc   +4 more sources

A numerical study on hydrogen blending in natural gas pipeline by a T-Pipe

Journal of Pipeline Science and Engineering
In order to study the flow blending and transporting process of hydrogen that injects into the natural gas pipelines, a three-dimensional T-pipe blending model is established and the flow characteristics are investigated systematically by the large eddy ...
Xin Ouyang, Qiao He, Chong Chai, Yeqin Wang, Tao Di, Jingwei Zhou, Xu Sun   +6 more
doaj   +3 more sources

Optimum blending hydrogen ratio in spray combustion to reduce emissions of nitrogen oxides

International Journal of Thermofluids
This study examined the effects of adding hydrogen to flammable liquid fuel droplets on emissions. It was found that an optimal mixing ratio with hydrogen can reduce the amount of NOx in the reaction zone, which is the area where the primary combustion ...
Ahmed Abed Al-Kadhem Majhool, Noor M. Jasim, Sara Falih Kareem, Mujtaba A. Flayyih, Faris Alqurashi   +4 more
doaj   +2 more sources

Effect of hydrogen-blended natural gas on combustion stability and emission of water heater burner

Case Studies in Thermal Engineering, 2022
To study the effect of hydrogen-blended natural gas on the combustion stability and emission of domestic gas water heater, a test system is built in this paper, taking a unit of the partial premixed burner commonly used in water heaters as the object ...
Xinyi Zhan, Zhiguang Chen, Chaokui Qin
doaj   +1 more source

Effects of hydrogen blending on hydraulic and thermal characteristics of natural gas pipeline and pipe network

Oil & Gas Science and Technology, 2021
Blending a fraction of hydrogen into the natural gas pipeline or urban pipe network is an efficient approach for hydrogen delivery. In this paper, the mathematical model of Hydrogen-Blended Natural Gas (HBNG) transportation is established, and the ...
Zhang Heng, Li Jingfa, Su Yue, Wang Peng, Yu Bo   +4 more
doaj   +1 more source

A study on the synergistic effects of hydrogen blending ratio and inlet configuration on mixing characteristics and energy efficiency in pipelines [PDF]

AIP Advances
Achieving China’s “Dual Carbon” strategic goals and facilitating a green transition of the energy structure necessitate the development of cost-effective hydrogen transportation.
Yilong Qiu, 邱奕龙, Huiyu Chen, 陈荟宇, Hongfa Huang, 黄洪发, Lu Wang, 王璐   +7 more
doaj   +1 more source

Chemical kinetics properties and the influences of different hydrogen blending ratios on reactions of natural gas

Case Studies in Thermal Engineering, 2023
Hydrogen is blended with natural gas to form hydrogenated natural gas (HCNG), which is a new, efficient and clean energy. CHEMKIN-PRO 19.0 software was combined with the GRI-Mech 3.0 mechanism to evaluate the capacity of H2 blending in reducing CO and CO2 emissions.
Hongtao Dong, Runzhi Li, Wenbin Zhao, Yansong Zhang, Xu Chen, Qi Zhang, Mengting Cao, Fengyuan Liu   +7 more
openaire   +2 more sources

Study on the Hydrogen Embrittlement and Fatigue Performance of In-Service X60 Pipeline Steel in Hydrogen-Blended Environments [PDF]

Cailiao Baohu
With the increasing urgency of hydrogen blending transportation in in-service natural gas pipelines in the development demand of hydrogen energy utilization， in-service pipeline materials will face the safety risk of running in hydrogen environment.To ...
FEI Fan, WEI Renchao, YANG Zhiwen, FENG Min, WANG Xiuyun
doaj   +1 more source

Numerical simulation of leakage and diffusion of buried pure hydrogen/hydrogen-doped natural gas pipeline

You-qi chuyun, 2023
In order to study the diffusion characteristics of pure hydrogen/hydrogen-doped natural gas in the soil environment, a three-dimensional leakage model of the buried pure hydrogen/hydrogen-doped natural gas pipeline was established by Fluent software.
Weipeng HU, Guang CHEN, Baojin QI, Yonghai ZHANG   +3 more
doaj   +1 more source

Heat release rate surrogate for ammonia–hydrogen premixed flames under various conditions

Applications in Energy and Combustion Science, 2023
Blending hydrogen has proven an efficient method to enhance the combustion stability of gaseous ammonia flames. Heat release rate (HRR), as an important parameter to indicate combustion process, is hard to be directly measured and highly dependent on the
Jiangkuan Xing, Abhishek Lakshman Pillai, Ryoichi Kurose   +2 more
doaj   +1 more source