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    Wyświetlanie 1-4 z 4
    Tytuł:
    Experimental research on the volatilization and condensation of ammonium bisulfate as SCR byproduct
    Autorzy:
    Jiao, Kunling
    Ma, Shuangchen
    Chen, Xiangyang
    Liu, Jiaming
    Qiao, Lin
    Powiązania:
    https://bibliotekanauki.pl/articles/2174830.pdf
    Data publikacji:
    2022
    Wydawca:
    Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
    Tematy:
    Ammonium bisulfate
    ABS
    influencing factors
    volatilization rate
    condensation pattern
    Opis:
    In this paper, the research progress of ammonium bisulfate (ABS) volatilization in coal-fired power plants the SCR denitrification process was reviewed. Combination with self-made experiments, SEM, flue gas analyzer and TG-DTG curves of ABS and ion chromatography. The volatilization and condensation characteristics of ABS were investigated carefully. Results show that as the temperature increased by 50 °C, the ABS/AS volatilization rate increased by an order of magnitude. The decomposition process of ABS should have a two-step reaction. The reaction in the initial volatilization stage is ABS dehydration turned into (NH4)2S2O7. The reaction in the rapid volatilization stage is (NH4)2S2O7 decomposed into NH3, N2, SO2 and H2O. There is an inter-section in the reac-tion temperature range (especially 300 °C) between the two-step reaction. This research provides an experimental basis for temperature control of ABS to avoid air pre-heater fouling.
    Źródło:
    Polish Journal of Chemical Technology; 2022, 24, 4; 30--38
    1509-8117
    1899-4741
    Pojawia się w:
    Polish Journal of Chemical Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Path planning for an autonomous underwater vehicle in a cluttered underwater environment based on the heat method
    Autorzy:
    Sun, Kaiyue
    Liu, Xiangyang
    Powiązania:
    https://bibliotekanauki.pl/articles/1838202.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    autonomous underwater vehicle
    path planning
    heat method
    heat diffusion
    cost function
    autonomiczny pojazd podwodny
    planowanie trasy
    dyfuzja ciepła
    funkcja kosztu
    Opis:
    This paper proposes a novel autonomous underwater vehicle path planning algorithm in a cluttered underwater environment based on the heat method. The algorithm calculates the isotropic and anisotropic geodesic distances by adding the direction and magnitude of the currents to the heat method, which is named the anisotropy-based heat method. Taking account of the relevant influence of the environment on the cost functions, such as currents, obstacles and turn of the vehicle, an efficient collision-free and energy-optimized path solution can be obtained. Simulation results show that the anisotropy-based heat method is able to find a good trajectory in both static and dynamic clutter fields (including uncertain obstacles and changing currents). Compared with the fast marching (FM) algorithm, the anisotropy-based heat method is not only robust, flexible, and simple to implement, but it also greatly saves time consumption and memory footprint in a time-variant environment. Finally, the evaluation criteria of paths are proposed in terms of length, arrival time, energy consumption, and smoothness.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2021, 31, 2; 289-301
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Path planning for an autonomous underwater vehicle in a cluttered underwater environment based on the heat method
    Autorzy:
    Sun, Kaiyue
    Liu, Xiangyang
    Powiązania:
    https://bibliotekanauki.pl/articles/1838198.pdf
    Data publikacji:
    2021
    Wydawca:
    Uniwersytet Zielonogórski. Oficyna Wydawnicza
    Tematy:
    autonomous underwater vehicle
    path planning
    heat method
    heat diffusion
    cost function
    pojazd podwodny autonomiczny
    planowanie trasy
    dyfuzja ciepła
    funkcja kosztu
    Opis:
    This paper proposes a novel autonomous underwater vehicle path planning algorithm in a cluttered underwater environment based on the heat method. The algorithm calculates the isotropic and anisotropic geodesic distances by adding the direction and magnitude of the currents to the heat method, which is named the anisotropy-based heat method. Taking account of the relevant influence of the environment on the cost functions, such as currents, obstacles and turn of the vehicle, an efficient collision-free and energy-optimized path solution can be obtained. Simulation results show that the anisotropy-based heat method is able to find a good trajectory in both static and dynamic clutter fields (including uncertain obstacles and changing currents). Compared with the fast marching (FM) algorithm, the anisotropy-based heat method is not only robust, flexible, and simple to implement, but it also greatly saves time consumption and memory footprint in a time-variant environment. Finally, the evaluation criteria of paths are proposed in terms of length, arrival time, energy consumption, and smoothness.
    Źródło:
    International Journal of Applied Mathematics and Computer Science; 2021, 31, 2; 289-301
    1641-876X
    2083-8492
    Pojawia się w:
    International Journal of Applied Mathematics and Computer Science
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of Ultraviolet Absorber on Photo-Degradation of Epoxy Coating Studied by Slow Positron Beam
    Autorzy:
    Wang, Zheng
    Liu, Fuwei
    Li, Jingjing
    He, Chunqing
    Peng, Xiangyang
    Huang, Zhen
    Fang, Pengfei
    Powiązania:
    https://bibliotekanauki.pl/articles/1033239.pdf
    Data publikacji:
    2017-11
    Wydawca:
    Polska Akademia Nauk. Instytut Fizyki PAN
    Tematy:
    epoxy coating
    photo-degradation
    ultraviolet absorber
    slow positron beam
    microstructure
    Opis:
    The photo-degradation progress of epoxy coating and the effect of ultraviolet absorber under UV-B irradiation have been investigated in slow positron beam and by the Fourier transform infrared spectrometer. After 120 h of irradiation, the value of S parameter in sample bulk is reduced while compared with the virgin sample. The result is mostly due to post-cure process happening in this initial irradiation stage. As the irradiation time increases to 360 h, the S parameter decreases sharply. This is due to the growth of carbonyl group and the generation of free radical. After 528 h or longer time of irradiation, a very low S value was obtained near sample surface, indicating the formation of a dead surface layer. Positron results also reveal that the addition of ultraviolet absorber suppresses the development of the dead layer after long-term UV-B irradiation. Ultraviolet absorber has a suppressing effect on generation of polar groups towards sample bulk. The addition of ultraviolet absorber is a key factor that affects the photo-degradation of epoxy coating.
    Źródło:
    Acta Physica Polonica A; 2017, 132, 5; 1523-1526
    0587-4246
    1898-794X
    Pojawia się w:
    Acta Physica Polonica A
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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