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Online since: March 2007
Authors: Jilt Sietsma, L. Strezov, T. Zuidwijk, Dominic Phelan, Rian Dippenaar
The major benefits of this technology compared to conventional slab casting are a reduction of between 35-45% in capital costs, it is 7.5 times more energy efficient, and a 70 to 90% reduction in CO2, NOx and SO2 emissions [1],[2].
Similarly, a reduction in surface tension was shown by these researchers to enhance the heat transfer rates, as a more intimate contact was achieved.
The movement of the ram triggers magnetic switches, which initiate the data recording and turn off the induction generator resulting in the droplet settling on the substrate.
This novel technique does provide data on the transformation path, but is restricted to a time resolution of 500 ms.
Solenoid N2 Supply T/C Data Acquisition PLC Induction Generator Data Acquisition 2-colour Pyrometer Gas inlet Prism Sample Positioner Coil Silica Tube Sample Substrate Data logger triggers Pneumatic Ram Adjustable Stopper and Damper Magnetic TriggersThis technique offers a quantitative measure of not only the onset and progress of phase transformations but a means of identifying individual phases with a time resolution of 0.1 ms.
Online since: February 2014
Authors: Matthias Schuss, Ulrich Pont, Ardeshir Mahdavi, Nargjil Saipi
This paper compares calculated and measured energy use data (for space heating and cooling) pertaining to a hospital building in Austria.
Thereby, an effort was made to define model input assumptions (building construction, weather data, internal gains) based on actual circumstances in reality.
Monitored data, default settings, fault indications, and other related information are sent to the communication and control center [4].
Actual energy use data was provided by the building management.
Furthermore, heating degree days as per EC’s weather data are about 5% higher than the weather data used for the simulation.
Online since: February 2011
Authors: Hong Sun
Therefore, only the current data from strips 2 to 22 are used in the following presentations.
Even though the current data from numbers 1 and 23 are not used in the final result analysis, these two strips must be put in place and connected to the same potentiostat to ensure the validity of the symmetry assumption for the two adjacent measuring strips.
Firstly, the oxidation of hydrogen in the anode is faster 105 times than the reduction of oxygen in the cathode.
At the downstream, the membrane absorbs water produced by the reduction of oxygen, leading to the decrease of the resistance and the increase of the current density.
Online since: April 2012
Authors: Fan Gao, Fang Zhang, Wei Ming Zeng, Kang Juan, Yu Chun Li
Impedance spectroscopy was analyzed by Zview software and data analysis was conducted with Origin software [5].
Table 2 AC impedance analysis of Alloy 600 in sodium sulfate solutions under 25℃ C (mg/L) 0.01 0.03 0.05 0.08 0.10 0.15 Rct(Ω) 125.5 58.48 23.37 19.63 16.32 11.75 Ru(kΩ) 35.1 11.0 0.7 2.52 7.42 3.33 Cd(µF) 2.52×10–3 4.07×10–3 7.19×10–3 7.94×10–3 1.01×10–2 8.99×10–3 1: 0.01mol/L 2: 0.03mol/L 3: 0.05mol/L 4: 0.08mol/L 5: 0.10mol/L 6: 0.15mol/L Fig.2 AC impedance diagram of Alloy 600 in sodium sulfate solutions under 25℃ High temperature corrosion data This experiment was carried out with analytical purity Na2SO4 dissolved in deionized water, and concentration was 0.4mol/L with 300℃ temperature for 36 hours; and the corresponding pressure was 7.2MPa.
In the process Tafel experiment, there was air bubbles around Pt electrode, which was caused by cathode reduction hydrogen evolution reaction (2H+ + 2e = H2).
Sala B .et al .Chemistry of Sulfur in High Temperature water Reduction of Sulfates.
Online since: February 2011
Authors: Siti Zuliana Salleh, Zulkifli Ahmad, Ismail Hanafi
From these data, curing rate index (CRI) was calculated by using this formulation (1): Curing Rate Index (CRI) = 100 / (t90-ts2) (1) [7] Fatigue properties.
The calculated data was fatigue life in kilocycles (kc).
Fig. 3 shows the effect of various HNTs/CB hybrids loading towards the cure rate index (CRI) of NR nanocomposites where it can be observed that the reduction of HNTs caused higher CRI which indicates shorter optimum crosslink formation compared to the nanocomposites with more HNTs.
From this figure, it can be seen that the addition of more CB than HNTs caused reduction in fatigue life.
Online since: October 2012
Authors: De Li Luo, Zhi Yong Huang, Jiang Feng Song, Yong Yao
Table 1 Reaction mechanisms and algebraic expressions[9] serial number Reaction mechanism f(x) G(x)(integrated forms of f (x)) R2 A One-dimensional diffusion (1/2)x x2=kt 0.83 B Two-dimensional diffusion 1/[-ln(1-x)] (1-x)ln(1-x)=kt 0.59 C Three-dimensional diffusion (Jander eq.) 3(1-x)2/3/{2[1-(1-x)1/3]} [1-(1-x)1/3]2=kt 0.989 D Three-dimensional diffusion (Ginstein-Brounshtein eq.) (3/2)[(1-x)-1/3-1] 1-2x/3-(1-x)2/3=kt 0.96 E First-order reaction (unimolecular decay law) (1-x) -ln(1-x)=kt 0.998 F Phase-boundary controlled (contracting cylinder) (1-x)1/2 1-(1-x)1/2=kt 0.899 G Phase-boundary controlled (contracting sphere) (1-x)2/3 1-(1-x)1/3=kt 0.981 H Two-dimensional growth of nuclei 2(1-x)[-ln(1-x)]1/2 [-ln(1-x)]1/2=kt 0.951 I Three-dimensional growth of nuclei 3(1-x)[-ln(1-x)]2/3 [-ln(1-x)]2/3=kt 0.99 The data of conversion rate(x) versus time(t) for 773K and 10000ppm was first taken into the G(x) equations for fitting, the G(x)-t curve for each equation is shown in figure
Fig.4 The G(x)-t curves of different mechanism equations Fig.5 The [–ln(1-x)]~t curves at different tempratures (a).10000ppm; (b).5000ppm; (c).2500ppm Equation E was used to deal with all other data for different temperature and H2O concentration.
References [1] F.Ghezzi,W.T.Shmayda,N.Venkataraman, Efficient HTO reduction using a ZrFeMn alloy,Fusion Engineering and Design.28(1995)367-372
[9] K.S.Go,S.R.Son,S.D.Kim,Reaction kinetic of reduction and oxidation of metal oxides for hydrogen production,International Journal of Hydrogen Energy.33(2008),5986-5995.
Online since: October 2014
Authors: Salam J. Bash Al-Maliky
This in turn leads to a reduction in the friction losses.
This is due to the reduction in pumping head from one side and the increase in the submerged length from the other side.
Fig. 2 Effect of suction pipe diameter on the pumping rate at submergence ratio (0.2) Fig. 3 Effect of suction pipe diameter on the pumping rate at submergence ratio (0.3) Fig. 4 Effect of suction pipe diameter on the pumping rate at submergence ratio (0.4) Fig. 5 Effect of suction pipe diameter on the pumping rate at submergence ratio (0.5) Pumping rate (Kg/s) Ds= 0.063m Ds= 0.048m Ds= 0.033m Ds= 0.027m Ds= 0.021m Fig.6 The relation between pumping rate and submergence ratio for the different suction pipe diameters ----- Experimental data ___ Stenning & Martin model Fig.7 A comparison between the experimental data and Stenning & Martin model References [1] Awari G.
Online since: October 2013
Authors: Wei Jie Wu, Guo Jie Ye
(3) Seen from the operator moving data got with Spaghetti Diagram, there is much unnecessary movement of operations staff in the production process, resulting in waste, as shown in Fig.3.
Fig.5 Spaghetti diagram of optimized elevator controller assembly line The reduction of process time.
Table 1 Compare of elevator controller assembly before and after improvement subject Optimized status Optimized status Reduced ratio Cycle time(day) 6.95 6.09 12.40% Manufacturing time(Min) 121.97 102.33 16.10% Operator number (person) 5 4 20.00% Work time per month(hour) 2405 1953 18.79% Over time per month(hour) 557 105 81.15% Summary By introducing the flexible improvement of elevator controller assembly line, the specific sequence of operations, precautions, methods for analytical tools, methods for data collection and analysis, experience of using analytical tool are described to improve traditional production line with Value Stream Mapping.
Zammori: Application of value stream mapping for lean operations and cycle time reduction: an Indian case study [J].
Online since: January 2018
Authors: Surasak Suranuntchai, Aekkapon Sunanta
Material properties data that needed to input into FE program could be represented in Fig. 3.
When adjusting DBRF of drawbead no. 1 and no. 3, the simulation results showed the reduction of cracks area on the part with reducing DBRF as seen in Figs. 9-10.
From the results studied, the suitable process conditions needed to be improved were the new drawbead design, which adjusted two drawbead geometry follow DBRF on die face, had shown the reduction of the cracks zone on the part, when comparing with the original design.
In addition, sincere thanks must be given to Thai Summit Automotive Co., Ltd for useful advice and providing the importance data about the parts.
Online since: April 2021
Authors: A.A. Popov, P.G. Shelenkov, P.V. Pantyukhov
The reduction of properties after biodegradation for 2 years was shown.
Compatibilizer functions are the follows: 1) Interfacial tension reduction, facilitating dispersion 2) Stabilization of morphology from strong stress and strain (e.g. injection molding) 3) Adhesion improvement between phases in solid body [17].
Materials and Methods According to previously obtained data, optimal trademark of ethylene-vinyl acetate copolymer, EVA EA 28025 by LG Chem (MFI = 25 g/10 min, Tm = 69 oC, vinyl acetate content = 28 wt. %) was chosen for the preparation of highly filled biocomposites [18].
The influence of the EVA concentration on the MFI of the binary EVA/PE blends and biocomposites The experimental data of the pure EVA MFI (18 g/10 min) was a bit different to the parameter, claimed by the manufacturer (25 g/10 min).
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