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RISS 인기검색어
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- 저자 : Haitao Fan (검색결과 6 건)
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Thermal balance performance simulation and optimization of full-ground crane cabins
Yongkang Shi,Zhenlei Chen,Haitao He,Fan Shi,Penyong Liu,Yong Wang 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.2
To solve the excessive thermal load problem of the crane engine and engine compartment, a combined 1-D and 3-D thermal simulation method is developed to numerically simulate the heat flow field inside and outside the engine compartment, the engine thermal system and the cooling system. Simultaneously, to ensure the accuracy of the numerical calculation boundary and the feasibility of the combined thermal simulation method, the trailer heat balance test is conducted under the rated conditions and the maximum torque conditions. By reasonably sealing the heat dissipation assembly at the front of the nacelle, bottom guards under the engine are added and other improvement measures are taken. It is found that the engine outlet’s coolant temperature is decreased by 15.9 °C under rated conditions when the improved crane is in the 36 °C environment. While the outlet’s coolant temperature is decreased by 20 °C under maximum torque conditions.
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Zhu Sining,Wan Haitao,Yan Zhibo,Xi Chen,Zhang Yuzhuo,Zhang Fan 한국화학공학회 2023 Korean Journal of Chemical Engineering Vol.40 No.9
With the continuous development of the concept of green chemistry, more attention is being paid to the selective capture of copper (II) from wastewater and its recovery and reuse. Ion imprinting technology is widely used to remove heavy metals from aqueous solutions due to its high selectivity. In this work, Cu(II) imprinted polymer (Cu(II)-IIP) was prepared by stepwise polymerization using Cu(II) ions as the template ions, PEG-600 as a pore-forming agent, epoxy resin as the carrier, and polyethylene polyamine as curing agent and complexing agent. The influences of solution pH, reaction temperature, reaction time and initial solubility of metal ions on its adsorption ability were systematically examined. The studies showed that the maximum adsorption quantity was 91.58 mg/g when pH=5 and T=318 K. The adsorption for Cu(II) of the Cu(II)-IIP was considered to be the monolayer chemisorption and spontaneous endothermic process. In the presence of multiple coexisting ions, Cu(II)-IIP had high selectivity for Cu(II). After five adsorption-desorption cycles, high removal rate could still be obtained, which means that the material provides a feasible method for treating wastewater containing Cu(II) ions.
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Yunhai Wu,Zhu Ming,Shengxin Yang,Yiang Fan,Peng Fang,Haitao Sha,Ligen Cha 한국공업화학회 2017 Journal of Industrial and Engineering Chemistry Vol.46 No.-
The adsorption mechanism of Cr(VI) uptake onto Bamboo Charcoal grafted by Cu2+-N-aminopropylsilanecomplexes (BC/Cu-N) was investigated. The properties of BC/Cu-N were characterized using XRD, FTIR,SEM, EDS, potentiometric acid–base titration and electrochemical analysis. Results indicated that theframework integrity of BC was kept aftermodification and the quantity of functional groups on BC/Cu-Nsurface has changed. There existed functional groups on the BC/Cu-N which could consume OH and thepHpzc was found to be 6.20. Moreover, electrochemical analysis showed that new electron transferpathway was imported. Parameters such as pH, initial Cr(VI) concentration, adsorbent dosage andtemperature were optimized using RSM. Analysis of variance of the quadratic model for Cr(VI) wassuitable to predict the adsorption of Cr(VI) (F value = 134.23 and P value < 0.001) with a high correlation(R2 = 0.9921). The results showed that the initial Cr(VI) concentration and the adsorption capacity ofCr(VI) were positively related. Adsorption data of Cr(VI) were better fitted by Sips, Temkin and D-Rmodels with the maximum adsorption capacity of 17.9383 mg/g. In addition, the pseudo second-orderkinetic model was found to be more suitable for the adsorption of Cr(VI).
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An on-chip hybrid plasmonic light steering concentrator with ∼96% coupling efficiency
Zhang, Tian,Wang, Maoning,Yang, Yong,Fan, Fei,Lee, Takhee,Liu, Haitao,Xiang, Dong The Royal Society of Chemistry 2018 Nanoscale Vol.10 No.11
<P>We, for the first time, propose and theoretically study a plasmonic light steering concentrator (PLSC) that is based on a hybrid photonic-plasmonic sandwich structure. In this device, a transverse electric (TE) polarization guided mode supported by a silicon-on-insulator (SOI) waveguide is vertically coupled to a metal-dielectric-metal sandwich structure, while the structure steers the light to a perpendicular metal taper and focuses the light on the apex of the taper with a small radius of 15 nm. Based on the coupled-mode theory, the two supermodes (quasi-TM modes) are clarified to illustrate the coupling mechanism of the device. We numerically obtain over 96% coupling efficiency at the 1500 nm telecommunication wavelength, and the mode width supported by the apex is limited laterally within the range of ∼110 nm, where the field enhancement calculated is found to be more than 10<SUP>7</SUP> compared to that of light in the silicon waveguide.</P>
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Effects of surfactant contamination on oxygen mass transfer in fine bubble aeration process
Lu Qi,Hongchen Wang,Xulu Chen,Guo-hua Liu,Haitao Fan,Meidi Li,Tao Luo 한국화학공학회 2013 Korean Journal of Chemical Engineering Vol.30 No.9
The effects of anionic, cationic, and non-ionic surfactants (SDS, SDBS, CTAB and Tween20) on oxygen mass transfer (OMT) in fine bubble aeration systems were investigated. The overall gas-liquid volumetric mass transfer coefficient (KLa), specific interfacial area (a), and liquid-side mass transfer coefficient (KL) parameters were used to assess the influence of the surfactants. At the same concentration, the different surfactants were observed to influence the KLa value as follows: KLa (SDBS)>KLa (SDS)>KLa (tween20)>KLa (CTAB). For all used surfactants, the overall trends showed a significant decrease in the KLa value at low concentrations (0-5mg/L), while the KLa value recovered somewhat at high concentrations (10-20mg/L). The decrease to the KL value was found to be much larger than increase in the a value in the presence of surfactants. Furthermore, a simple model was established that provides an OMT prediction for different surfactants.
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Dong Liu,Tao Sun,Yuqin Hu,Yigang Ding,Baomin Fan,Haitao Wang 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.125 No.-
The controllable adjustment of pore structure is of great significance for the high capacitive performanceof porous carbon materials. In this research, a versatile K2CO3 activation approach is proposed to adjustand control the porosity of sunflower plate-derived hierarchical porous carbon materials (HPC-x) by controllingthe K2CO3/carbons mass ratio. Notably, the variety of pore types, including micropores, mesoporesand macropores, can be detected at different K2CO3/carbons mass ratios (0 4). Impressively,the specific surface area of optimal HPC-2 material is 2526 m2/g. Compare with the other samples(HPC-1, HPC-3 or HPC-4), the HPC-2 possess superior capacitance activity (369.4 F/g at 0.5 A/g). Ontop of that, the energy density of HPC-2 assembled supercapacitors in 1 M Na2SO4 and 6 M KOH solutionscan even reach 32.6 and 7.3 Wh/kg, respectively.
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