scholarly journals Mathematical modelling and experimental study of straw co-firing with gas using electric field control of combustion characteristics

2020 ◽  
Author(s):  
Harijs Kalis ◽  
Antons Kolmickovs ◽  
Maksims Marinaki ◽  
Raimonds Valdmanis
Keyword(s):  
Experimental Study ◽  
Electric Field ◽  
Mathematical Modelling ◽  
Combustion Characteristics ◽  
Field Control

scholarly journals MATHEMATICAL MODELLING AND EXPERIMENTAL STUDY OF STRAW CO-FIRING WITH GAS

2019 ◽  
Vol 24 (4) ◽  
pp. 507-529
Author(s):  
Inesa Barmina ◽  
Harijs Kalis ◽  
Antons Kolmickovs ◽  
Maksims Marinaki ◽  
Liiva Ozola ◽  
...  
Keyword(s):  
Experimental Study ◽  
Thermal Decomposition ◽  
Mathematical Modelling ◽  
Wheat Straw ◽  
Energy Production ◽  
Heat Energy ◽  
Combustion Characteristics ◽  
Combustion Dynamics ◽  
Additional Heat ◽  
Ignition And Combustion

The main goal of the present study is to promote a more effective use of agriculture residues (straw) as an alternative renewable fuel for cleaner energy production with reduced greenhouse gas emissions. With the aim to improve the main combustion characteristics at thermo-chemical conversion of wheat straw, complex experimental study and mathematical modelling of the processes developing when co-firing wheat straw pellets with a gaseous fuel were carried out. The effect of co-firing on the main gasification and combustion characteristics was studied experimentally by varying the propane supply and additional heat input into the pilot device, along with the estimation of the effect of co-firing on the thermal decomposition of wheat straw pellets, on the formation, ignition and combustion of volatiles (CO, H2). A mathematical model has been developed using the environment of the Matlab (2D modelling) and MATLAB package ”pdepe”(1D modelling) considering the variations in supplying heat energy and combustible volatiles (CO, H2) into the bottom of the combustor. Dominant exothermal chemical reactions were used to evaluate the effect of co-firing on the main combustion characteristics and composition of the products CO2 and H2O. The results prove that the additional heat from the propane flame makes it possible to control the thermal decomposition of straw pellets, the formation, ignition and combustion of volatiles and the development of combustion dynamics, thus completing the combustion of biomass and leading to cleaner heat energy production.

scholarly journals Electric field control of radiative heat transfer in a superconducting circuit

2020 ◽  
Vol 11 (1) ◽  
Author(s):  
Olivier Maillet ◽  
Diego Subero ◽  
Joonas T. Peltonen ◽  
Dmitry S. Golubev ◽  
Jukka P. Pekola
Keyword(s):  
Heat Transfer ◽  
Electric Field ◽  
Radiative Heat Transfer ◽  
Radiative Heat ◽  
Superconducting Circuit ◽  
Field Control

Electric Field Control of the Magnetic Weyl Fermion in an Epitaxial SrRuO 3 (111) Thin Film

2021 ◽  
pp. 2101316
Author(s):  
Weinan Lin ◽  
Liang Liu ◽  
Qing Liu ◽  
Lei Li ◽  
Xinyu Shu ◽  
...  
Keyword(s):  
Thin Film ◽  
Electric Field ◽  
Field Control ◽  
Weyl Fermion

scholarly journals Electric-Field Control of Spin–Orbit Torques in WS2/Permalloy Bilayers

2018 ◽  
Vol 10 (3) ◽  
pp. 2843-2849 ◽  
Author(s):  
Weiming Lv ◽  
Zhiyan Jia ◽  
Bochong Wang ◽  
Yuan Lu ◽  
Xin Luo ◽  
...  
Keyword(s):  
Electric Field ◽  
Spin Orbit ◽  
Field Control

scholarly journals Spectroscopic analysis of high electric field enhanced ionization in laser filaments in air for corona guiding

2016 ◽  
Vol 4 ◽  
Author(s):  
Yingxia Wei ◽  
Yaoxiang Liu ◽  
Tie-Jun Wang ◽  
Na Chen ◽  
Jingjing Ju ◽  
...  
Keyword(s):  
Experimental Study ◽  
Femtosecond Laser ◽  
Electric Field ◽  
Corona Discharge ◽  
High Voltage ◽  
Fluorescence Spectra ◽  
Spectroscopic Analysis ◽  
Laser Pulses ◽  
Spectroscopic Measurement ◽  
High Electric Field

We report on a systematic experimental study on the fluorescence spectra produced from a femtosecond laser filament in air under a high electric field. The electric field alone was strong enough to create corona discharge (CD). Fluorescence spectra from neutral and ionic air molecules were measured and compared with pure high-voltage CD and pure laser filamentation (FIL). Among them, high electric field assisted laser FIL produced nitrogen fluorescence more efficiently than either pure CD or pure FIL processes. The nonlinear enhancement of fluorescence from the interaction of the laser filament and corona discharging electric field resulted in a more efficient ionization along the laser filament zone, which was confirmed by the spectroscopic measurement of both ionization-induced fluorescence and plasma-scattered 800 nm laser pulses. This is believed to be the key precursor process for filament-guided discharge.

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