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Junfu Lyu
Tsinghua University
CombustionBoiler (power generation)ChemistryFluidized bed combustionThermodynamics
30Publications
4H-index
34Citations
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Publications 36
Newest
#2Man ZhangH-Index: 9
Last. Junfu LyuH-Index: 4
view all 7 authors...
Abstract The bottom ash cooler is an important auxiliary equipment of a circulating fluidized bed (CFB) boiler. As the CFB boiler technology develops, the rotary ash coolers have partially substituted the fluidized bed bottom ash coolers in the industrial practice due to its excellent reliability. To meet the increased output requirement, a double-cylinder rotary ash cooler, rather than the conventional single-cylinder one, was proposed in the present study. This paper provided the design of the...
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#2Runxia CaiH-Index: 4
Last. Junfu LyuH-Index: 4
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#1Ning Weng (CAST: China Academy of Space Technology)
#2Qinggong Wang (CAST: China Academy of Space Technology)H-Index: 2
Last. Wei Yao (CAST: China Academy of Space Technology)H-Index: 7
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Abstract The dynamics of liquid penetration in porous wire mesh are experimentally studied in this work by particularly considering the influence of gravity. Similar experimental setups are used on the ground and in a drop tower facility in order to compare the experimental results directly. Visualization of the liquid penetrating process is realized by using single-layered wire mesh which is put between a pair of transparent parallel plates. The dependence of wire mesh on the parallel plates is...
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#1Youfu Ma (THU: Tsinghua University)
#2Xin Jin (USST: University of Shanghai for Science and Technology)
Last. Junfu Lyu (THU: Tsinghua University)H-Index: 4
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Abstract In circulating fluidized bed (CFB) boilers, L-shape platen superheaters often suffer from poor working conditions with a high risk of tube wall overtemperature. Thermal deviations of an L-shape platen superheater were studied by using a supercritical 600 MW CFB boiler as reference. Based on the prediction model of thermal deviations and a self-developed software, thermal deviations of the platen superheater were calculated and analyzed under three kinds of heat load distributions. The r...
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#1Haoshu ShenH-Index: 2
#2Yuxin WuH-Index: 14
Last. Junfu LyuH-Index: 4
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Large eddy simulation (LES) has become a promising tool for pulverized coal combustion with the development of computational fluid dynamics (CFD) technologies in recent years. LES can better capture the unsteady features and turbulent structures of coal jet flame than Reynolds averaged Navier Stokes (RANS). The coal-fired power plants in China are now required to be operated in a wide load range and quickly respond to the electric grid. The boiler performance of variable loads should be evaluate...
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#1Hang Shi (THU: Tsinghua University)
#2Yuxin Wu (THU: Tsinghua University)H-Index: 14
Last. Junfu Lyu (THU: Tsinghua University)H-Index: 4
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Abstract The huge reserve of Zhundong (ZD) coal makes it important for energy utilization of China. However, big concerns on fouling and slagging in pulverized coal-firing boilers were risen due to its high alkali content. It’s important to investigate deposition in different heating surfaces of a boiler burning ZD coal. In this paper, XRF, XRD, ICP-OES were conducted to analyze the properties of ash deposits collected from different heating surfaces in a 350 MW boiler burning 30% Wudong (WD) an...
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#1Weiliang Wang (THU: Tsinghua University)H-Index: 6
#2Junfu Lyu (THU: Tsinghua University)H-Index: 4
Last. Weidou Ni (THU: Tsinghua University)H-Index: 22
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Coal-fired power is the main power source and the biggest contributor to energy conservation in the past several decades in China. It is generally believed that advanced technology should be counted on for energy conservation. However, a review of the decline in the national average net coal consumption rate (NCCR) of China’s coal-fired power industry along with its development over the past few decades indicates that the upgradation of the national unit capacity structure (including installing ...
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#1Yiqun Huang (THU: Tsinghua University)H-Index: 1
#2Man Zhang (THU: Tsinghua University)H-Index: 9
Last. Yan Jin
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Abstract Due to high ash content and anisotropy of bedding structure, the effects of ash thickness and bedding structure anisotropy on combustion of oil shale semicoke were crucial. A two-dimensional mathematical model of oil shale semicoke particle combustion was developed and validated by combustion experiments of cylindrical Huadian oil shale semicoke particles on the self-designed Macro thermal gravimetric analyzer (TGA), with a weighting capacity over 100 g. There was obvious anisotropy dur...
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#1Boyu Deng (THU: Tsinghua University)
#1Deng Boyu (THU: Tsinghua University)
Last. Yang Hairui (THU: Tsinghua University)H-Index: 4
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Abstract The necessity of setting up the emergency water supply system in the supercritical circulating fluidized bed (CFB) boiler is still in controversy in the industry. Based on the research methods in the previous literature and the operating experience, this paper proposed three possible emergency strategies for sudden electricity failure. And by analyzing the physical process in the furnace under sudden electricity failure condition, a mathematical model consisted of the mass and energy co...
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#1Shahong Zhu (THU: Tsinghua University)H-Index: 1
#2Man Zhang (THU: Tsinghua University)H-Index: 9
Last. Hairui Yang (THU: Tsinghua University)H-Index: 19
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Abstract As one of the most important auxiliary systems of a circulating fluidized bed boiler, the limestone pneumatic conveying system is of great significance to its operation. Maldistribution of powder in the different injecting ports seriously limits inner-furnace desulfurization performance owing to inefficient mixing of limestone powder and SO2. The gas–solid flow characteristics of an industrial-scale multiple-branching limestone-conveying pipeline system of a 200 MW circulating fluidized...
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