Match!
Junfu Lu
Tsinghua University
110Publications
20H-index
1,139Citations
Publications 91
Newest
#1Huawei Jiang (Qingdao University)H-Index: 2
#2Hongwei Chen (NCEPU: North China Electric Power University)H-Index: 2
Last.Cuiping Wang (Qingdao University)H-Index: 8
view all 6 authors...
Abstract For the operation of a fluidized bed, solid particle size distribution is related to fluid dynamic behaviors, heat transfer efficiency, combustion efficiency, and desulfurization performance. Measurement of pressure fluctuations has a great advantage for detecting fluidization and combustion conditions, due to its flexible adaption to any operating conditions. In this study, the measurement and analysis of pressure fluctuations in the inlet of a wind cap of fluidized beds were carried o...
3 CitationsSource
#1Youfu Ma (THU: Tsinghua University)H-Index: 2
#2Zirui Wang (USST: University of Shanghai for Science and Technology)H-Index: 1
Last.Lijuan Yang (USST: University of Shanghai for Science and Technology)H-Index: 3
view all 4 authors...
Abstract There had been several processes for recovering exhaust gas heat at the boiler cold-end, thereby increasing the efficiency of a thermal power plant. However, the existing processes encounter a great challenge on the heat exchanger, wherein the acid corrosion, fouling and abrasion of heating surfaces are inevitable because it is working in very low temperature flue gas. In this paper, a novel hot air recirculation (HAR) process is advanced to avoid these tricky problems. To demonstrate t...
4 CitationsSource
#1Yiqiang Zhang (Kunming University of Science and Technology)H-Index: 1
#2Yecheng Yao (Kunming University of Science and Technology)H-Index: 1
Last.Junfu Lu (THU: Tsinghua University)H-Index: 20
view all 7 authors...
Abstract The design and optimization of gas heater in supercritical carbon dioxide Rankine cycles faces some challenges, among which an urgent one is the effect of thermal boundary condition on the performance of gas heater. This work focused on performance comparison and effects of major operating parameters under two most common thermal boundary conditions regarding to low-grade heat sources, by employing a modified Shear-Stress Transport model where a variable turbulent Prandtl formulation wa...
4 CitationsSource
#1Weiliang Wang (THU: Tsinghua University)H-Index: 6
#2Yuzhao WangH-Index: 2
Last.Weidou Ni (THU: Tsinghua University)H-Index: 22
view all 7 authors...
Abstract The natural draft dry cooling tower (NDDCT) has been increasingly used in power generation for its merits of excellent water-saving, high energy saving, simple maintenance and long life service. To study the performance of a newly installed 660 MW NDDCT under crosswind condition, a model with scale of 1:200 was built according to the scaling law of geometric similarity. The experiments were set up in self-similar region with high Reynolds to meet momentum similarity, while meeting the s...
4 CitationsSource
#1Zhouhang Li (Kunming University of Science and Technology)H-Index: 2
#2Yuling Zhai (Kunming University of Science and Technology)H-Index: 5
Last.Junfu Lu (THU: Tsinghua University)H-Index: 20
view all 6 authors...
Abstract Helical coils have gained increasingly interest in the field of supercritical carbon dioxide (SCCO 2 ) Rankine cycles during the last decade due to the compact structure and high heat transfer rate. Past studies mainly focused on effects of operating conditions and the gravitational buoyancy, and are not sufficient to fully understand the behavior of SCCO 2 helically coiled gas heaters. Influence of some other key factors, such as the coil orientations and internal wall roughness, on ov...
3 CitationsSource
#1Pengyuan Liu (Ministry of Education)H-Index: 3
#2Hai Zhang (Ministry of Education)H-Index: 8
Last.Junfu Lu (Ministry of Education)H-Index: 20
view all 5 authors...
Abstract The flow characteristics of two parallel jets ejecting from the nozzles with sudden contraction exits were studied using particle imaging velocimetry (PIV) technique. The measured mean velocity components, velocity vector contours, turbulence characteristics and Reynolds shear stresses showed that the flow fields adjacent to the exits are significantly different from those of the dual flows ejecting from the nozzles with constant cross section area. The sudden contraction at the exits s...
4 CitationsSource
#1Baixiang Xiang (THU: Tsinghua University)H-Index: 4
#2Wenfeng Shen (THU: Tsinghua University)H-Index: 1
Last.Junfu Lu (THU: Tsinghua University)H-Index: 20
view all 5 authors...
Abstract Experimental and numerical studies were conducted to determine the effects of different factors on homogeneous and heterogeneous formations of sulfur trioxide (SO 3 ) in a coal-fired circulating fluidized bed (CFB) boiler. In the experiments, homogeneous and heterogeneous formations of SO 3 under coal-fired CFB combustion conditions were measured using controlled condensation and S balance, respectively. Meanwhile, homogeneous SO 3 formation under coal-fired CFB combustion conditions wa...
4 CitationsSource
#1Guangxi Yue (THU: Tsinghua University)H-Index: 17
#2Runxia Cai (THU: Tsinghua University)H-Index: 4
Last.Hai Zhang (THU: Tsinghua University)H-Index: 19
view all 4 authors...
Circulating fluidized bed (CFB) technology was applied for coal combustion after CFB chemical reactors have been widely used and studied in chemical engineering. However, there were still many special phenomena found in the CFB boiler. In this paper, the main differences between a conventional CFB reactor and a CFB boiler are summarized. A CFB boiler is a special CFB reactor. It is an open circulating system with a wide size distribution feedstock and a low circulating solid flow rate. The CFB b...
25 CitationsSource
#1Baixiang XiangH-Index: 4
#2Man ZhangH-Index: 4
Last.Junfu LuH-Index: 20
view all 6 authors...
Various damages, including corrosion, fouling, and blue plumes, can be caused by sulfur trioxide (SO3) in the flue gas of a coal-fired boiler on boiler equipment and the atmospheric environment. The increasing demand for energy conservation and emission reduction requires accurate knowledge on predicting and controlling the SO3 concentration. Accurate knowledge on the effect of the factors that influence SO3 in flue gas is necessary as well. Therefore, in this study, various SO3 concentrations u...
5 CitationsSource
#1Pengyuan Liu (Ministry of Education)H-Index: 3
#2Jiajia Gao (EPRI: Electric Power Research Institute)H-Index: 1
Last.Junfu Lu (Ministry of Education)H-Index: 20
view all 7 authors...
Abstract A set of comprehensive on-site experiments was conducted to assess the performance of the louver-type primary air (PA) concentrators on anthracite ignition and combustion in a 600 MW supercritical arch-fired boiler (AFB) equipped with slot burners. The temperature profiles along the PA stream from fuel-rich and fuel-lean streams were measured under various conditions. The separation efficiency of the PA concentrators of two selected burners was also measured and its effect on the igniti...
11 CitationsSource
12345678910