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Online since: November 2011
Authors: Qiu Yue Guo, Xin Feng Guo, Hui Qing Fan, Zhu Hai Zhong, Lei Liu
The whole system was insulated with thermal insulation materials.
(2) According to the relation of heat transfer between internal tube and outer tube (cooling jacket), we can get (6) Where hi is heat transfer coefficient between gas-liquid flow and the internal side of tube, ho is heat transfer coefficient between cooling water and the outside of tube, λ is heat conductivity of tube material. di, do are internal and outside diameters of tube respectively.
transfer area, m2 d Inside pipe diameter, m m mass flow rate, m3/s t Temperature, ℃ DR Drag reduction, % DRA Drag reducing agent HTR Heat transfer reduction, % St Stanton Number, dimensionless PAM Polyacrylamide ppm Parts per million Re Reynolds number, dimensionless f Friction factor Nu Nusselt Number, dimensionless Pr Prandtl number, dimensionless USG Superficial gas velocity, m/s USL Superficial liquid velocity, m/s Δtm Logarithmic mean temperature difference Φ Heat flux, W K Overall coefficient of heat transfer, W/(m2•K) h Heat transfer coefficient, W/(m2•K) Rth Thermal resistance, (m2•K)/ W g Acceleration of gravity, m/s2 Greek symbols Δp Frictional pressure drop, Pa ρ Density, kg/m3 m Fluid viscosity, Pa•s λ Heat conductivity of internal tube, W/(m•K) Subscripts i Internal side of tube o Outside of tube (on the side of cooling water) DR With drag reduction agent References [1] Virk P S, “Drag reduction fundamentals,” AIChE Journal
“Experimental Heat transfer of drag-reducing polymer solutions in enhanced surface heat exchangers,” Experimental Thermal and Fluid Science, vol. 10, pp. 221-228, February 1995.
(2) According to the relation of heat transfer between internal tube and outer tube (cooling jacket), we can get (6) Where hi is heat transfer coefficient between gas-liquid flow and the internal side of tube, ho is heat transfer coefficient between cooling water and the outside of tube, λ is heat conductivity of tube material. di, do are internal and outside diameters of tube respectively.
transfer area, m2 d Inside pipe diameter, m m mass flow rate, m3/s t Temperature, ℃ DR Drag reduction, % DRA Drag reducing agent HTR Heat transfer reduction, % St Stanton Number, dimensionless PAM Polyacrylamide ppm Parts per million Re Reynolds number, dimensionless f Friction factor Nu Nusselt Number, dimensionless Pr Prandtl number, dimensionless USG Superficial gas velocity, m/s USL Superficial liquid velocity, m/s Δtm Logarithmic mean temperature difference Φ Heat flux, W K Overall coefficient of heat transfer, W/(m2•K) h Heat transfer coefficient, W/(m2•K) Rth Thermal resistance, (m2•K)/ W g Acceleration of gravity, m/s2 Greek symbols Δp Frictional pressure drop, Pa ρ Density, kg/m3 m Fluid viscosity, Pa•s λ Heat conductivity of internal tube, W/(m•K) Subscripts i Internal side of tube o Outside of tube (on the side of cooling water) DR With drag reduction agent References [1] Virk P S, “Drag reduction fundamentals,” AIChE Journal
“Experimental Heat transfer of drag-reducing polymer solutions in enhanced surface heat exchangers,” Experimental Thermal and Fluid Science, vol. 10, pp. 221-228, February 1995.
Online since: March 2011
Authors: Nicolas G. Wright, Alton B. Horsfall, Simon Barker, Ming Hung Weng, Rajat Mahapatra, Benjamin J.D. Furnival
High frequency C-V and G-V characterizations can only obtain the density of fast interface states in a narrow (about 0.5eV) energy window near the Fermi level due to the wide band gap of silicon carbide material (3.26eV for 4H-SiC).
Wright: IEEE Sensors Journal, Vol. 7 (2007) p. 1395 [3] H.
Wright: Materials Science in Semiconductor Processing, Vol. 9 (2006) p. 1133 [8] S.
Wright: IEEE Sensors Journal, Vol. 7 (2007) p. 1395 [3] H.
Wright: Materials Science in Semiconductor Processing, Vol. 9 (2006) p. 1133 [8] S.
Online since: May 2014
Authors: Dong Seok Rhee, Kei Woul Kim
As The influences of initial pH of solution, concentration of hydrogen peroxide and injection time of hydrogen peroxide to degrade organic materials have been investigated in the reaction system.
The ozone reactor was made of pyrex material with the capacity of 1000 ml and the connecting part was made of silicon tube so as to prevent from corrosion.
R. (2000) “Characterization of humic acid in the chemical oxidation technology (II) – characteristics by ozonation”, Analytical Science & Technology, 13(2), 241-249 [3] Santos E.
M. (1997) “Carboxylic acids : Formation and removal in full-scale plants”, Journal AWWA, 89(8), 88-97 [7] Nakamuro K., Ueno H., Kakao M., Sayato Y. (1990) “Formation of hydrogen peroxide by aqueous ozonation of humic acid and aromatic hydrocarbons”, Chemosphere, 20(5), 525-531 [8] Staeheiln J., Hoigne J. (1982) “Decomposition of ozone in water : rate of initiation by hydroxide ion and hydrogen peroxide”, Environ.
The ozone reactor was made of pyrex material with the capacity of 1000 ml and the connecting part was made of silicon tube so as to prevent from corrosion.
R. (2000) “Characterization of humic acid in the chemical oxidation technology (II) – characteristics by ozonation”, Analytical Science & Technology, 13(2), 241-249 [3] Santos E.
M. (1997) “Carboxylic acids : Formation and removal in full-scale plants”, Journal AWWA, 89(8), 88-97 [7] Nakamuro K., Ueno H., Kakao M., Sayato Y. (1990) “Formation of hydrogen peroxide by aqueous ozonation of humic acid and aromatic hydrocarbons”, Chemosphere, 20(5), 525-531 [8] Staeheiln J., Hoigne J. (1982) “Decomposition of ozone in water : rate of initiation by hydroxide ion and hydrogen peroxide”, Environ.
Online since: October 2009
Authors: Peng Niu, Gang Yang, Ben Qi Gong, Chun Fu Jin
Its ultimate state of bearing capacity is usually
determined by the loss of overall stability of the member, and it gives mainly the elastic-plastic
buckling on the plastic material.
Vol.65 (2009), P.737 [3] Liu Jie, Sun Sheng, Guan Yanjin: materials processing technology, Vol.209 (2009), P.1580 [4] Chen Ji: Stability of Steel Structures Theory and Design, science Press (2003) [5] Zhou Liyun,Guo Jiangang, Cao Tianjie: Journal of Taiyuan University of Technology, Vol.5 (2002), P.561 [6] Yang Gang Wang Haibin, Zhang Aifeng: Analytical Engineering Mechanics Vol.5 (2007), P.53
Vol.65 (2009), P.737 [3] Liu Jie, Sun Sheng, Guan Yanjin: materials processing technology, Vol.209 (2009), P.1580 [4] Chen Ji: Stability of Steel Structures Theory and Design, science Press (2003) [5] Zhou Liyun,Guo Jiangang, Cao Tianjie: Journal of Taiyuan University of Technology, Vol.5 (2002), P.561 [6] Yang Gang Wang Haibin, Zhang Aifeng: Analytical Engineering Mechanics Vol.5 (2007), P.53
Online since: October 2007
Authors: Martin Kittler, Manfred Reiche, Teimuraz Mchedlidze, Tzanimir Arguirov, Winfried Seifert, O.F. Vyvenko, T. Wilhelm, X. Yu
Since in our material the influence of the
dislocation network was much stronger - R was reduced by 4 orders of magnitude - we believe that
this effect is related to enhancement of both, the electron concentration and the electron mobility.
Mil'shtein, Journal de Physique, No. 6, Tome 40, C6-207 (1979)
Kittler et al., Materials Science and Engineering C 26, 902 (2006)
Mil'shtein, Journal de Physique, No. 6, Tome 40, C6-207 (1979)
Kittler et al., Materials Science and Engineering C 26, 902 (2006)
Online since: November 2012
Authors: Dong Xiang Chen, Yun Long Liu
The mention number of different design elements, For example, the mention number of modeling, color, and material is 10, 15, and 5.
The corresponding evaluation data Machine manufacturers modeling color materials form details visual function whole part The Number of Classification elements/ the number of Weighted statistics TRUMPF 1/10 1/18 MAZAK 2/11.5 3/8 1/10 AGIE CHARMILLES 1/17 1/10 1/15 okuma 1/10 1/15 AMAD 2/14 1/8 1/20 MAG 1/18 1/10 2/9 1/1 MORI SEIKI 1/14 1/12 Shenyang Machine Tool Factory 1/18 jtckt 1/13 1/15 Dalian Machine Tool Factory 1/12 1/14 GILDEMEISTER 2/10 5/13.4 1/6 1/9 After the Classified statistics to the data, we use the line chart to make the data visualization, so it is comparable.
References [1] Zhang W Y,Tor S B,Britton G A: The International Journal of Advanced Manufacturing Technology,2002,19:454-460 [2] Corbett B,Rosen D W:AIEDAM,2004,18(1),21~39 [3] Cvetkovic D,Parmee I C:AIEDAM,2002,16(5):331-342 [4] G.Schuh,W.Ley,M.P.Gruenenfelder and etc:Professional Engineering,2000:601-611 [5] Chen Hangyue,Luo Shijian:2008 IEEE 9th International Conference on Computer-Aided Industrial Design & Conceptual Design,2008 In Chinese [6] Shih-Wen Hsiao M.C.Liu: The Second International Symposium on Instrumentation Science and Technology,2002
The corresponding evaluation data Machine manufacturers modeling color materials form details visual function whole part The Number of Classification elements/ the number of Weighted statistics TRUMPF 1/10 1/18 MAZAK 2/11.5 3/8 1/10 AGIE CHARMILLES 1/17 1/10 1/15 okuma 1/10 1/15 AMAD 2/14 1/8 1/20 MAG 1/18 1/10 2/9 1/1 MORI SEIKI 1/14 1/12 Shenyang Machine Tool Factory 1/18 jtckt 1/13 1/15 Dalian Machine Tool Factory 1/12 1/14 GILDEMEISTER 2/10 5/13.4 1/6 1/9 After the Classified statistics to the data, we use the line chart to make the data visualization, so it is comparable.
References [1] Zhang W Y,Tor S B,Britton G A: The International Journal of Advanced Manufacturing Technology,2002,19:454-460 [2] Corbett B,Rosen D W:AIEDAM,2004,18(1),21~39 [3] Cvetkovic D,Parmee I C:AIEDAM,2002,16(5):331-342 [4] G.Schuh,W.Ley,M.P.Gruenenfelder and etc:Professional Engineering,2000:601-611 [5] Chen Hangyue,Luo Shijian:2008 IEEE 9th International Conference on Computer-Aided Industrial Design & Conceptual Design,2008 In Chinese [6] Shih-Wen Hsiao M.C.Liu: The Second International Symposium on Instrumentation Science and Technology,2002
Online since: July 2014
Authors: Disha Dewangan, Shobha Lata Sinha, Jasinta Poonam Ekka
It covers different digester designs and materials used for construction, important operating parameters such as ph, temperature, substrate, loading rate, applications of the biogas, the government policies concerning the use of household digesters, and the social and environmental effects of the digesters.
Health centre 20 11 220 10 2200 Agaanbadi 3 11 33 6 198 Temple 2 11 22 6 132 Street Light 50 11 550 12 6600 2 Fans In Homes 50 40 2000 10 20000 School 10 40 400 8 3200 TV Room 2 40 80 6 480 Health Centre 10 40 400 10 4000 Agaanbadi 2 40 80 6 480 3 Computer & Accessories School 2 300 600 2 1200 Health centre 2 300 600 4 2400 4 TV TV Room 2 60 120 4 480 5 Cooler Health centre 2 200 400 2 800 Total power required (PL) / connected load = 7298 W Total daily load required (PTL) / total watt hours required = 52,422 Whr/ day Type of load : 230 V AC 50 Hz single phase; PPV = [3] (PPV) = 11233.285 Watt or 12000 Watt or 12 kW Design of biogas plant Biogas is gaseous mixture of methane, carbon dioxide, hydrogen sulphids and several other gases, produced by anaerobic fermentation of organic material
Singh, “Optimal Design of a Cost Effective Solar Home power System - An Alternative Solution to DG for Grid deprived Rural India”, International Journal of Research and Reviews in Applied Sciences, Volume 2, Page(s): 1 – 7, January 2010
Health centre 20 11 220 10 2200 Agaanbadi 3 11 33 6 198 Temple 2 11 22 6 132 Street Light 50 11 550 12 6600 2 Fans In Homes 50 40 2000 10 20000 School 10 40 400 8 3200 TV Room 2 40 80 6 480 Health Centre 10 40 400 10 4000 Agaanbadi 2 40 80 6 480 3 Computer & Accessories School 2 300 600 2 1200 Health centre 2 300 600 4 2400 4 TV TV Room 2 60 120 4 480 5 Cooler Health centre 2 200 400 2 800 Total power required (PL) / connected load = 7298 W Total daily load required (PTL) / total watt hours required = 52,422 Whr/ day Type of load : 230 V AC 50 Hz single phase; PPV = [3] (PPV) = 11233.285 Watt or 12000 Watt or 12 kW Design of biogas plant Biogas is gaseous mixture of methane, carbon dioxide, hydrogen sulphids and several other gases, produced by anaerobic fermentation of organic material
Singh, “Optimal Design of a Cost Effective Solar Home power System - An Alternative Solution to DG for Grid deprived Rural India”, International Journal of Research and Reviews in Applied Sciences, Volume 2, Page(s): 1 – 7, January 2010
Online since: November 2016
Authors: Erlinda O. Yape, Nathaniel M. Anacleto
Anacleto2,b
1 Faculty, College of Engineering, Mindanao State University, Marawi City, 9700, Philippines
2 Faculty, Material Science Engineering Technology Department, MSU-IIT, Iligan City, Philippines
aerlyape@yahoo.com, bnatzanacleto@hotmail.com
Keywords: Carbothermic; Chromite; Reduction; isothermal.
Materials and Methods Two chromite samples, sandy chromite from Opol, Misamis Oriental (SCO) and lumpy chromite ores from Manticao, Misamis Oriental (LCM) were used in the study with activated carbon as reductant.
Journal of the Southern African Institute of Mining and Metallurgy 91 (1991) 397-409.
Materials and Methods Two chromite samples, sandy chromite from Opol, Misamis Oriental (SCO) and lumpy chromite ores from Manticao, Misamis Oriental (LCM) were used in the study with activated carbon as reductant.
Journal of the Southern African Institute of Mining and Metallurgy 91 (1991) 397-409.
Online since: June 2013
Authors: Da Ming Wu, Ying Liu, Xiu Ting Zheng, Ya Jun Zhang, Yang Zhou, Hong Xu, Hai Long Wei, Shi Bao Li
The material of diffuser is PMMA which refractive index=1.49, the refractive index of air=1.00,the critical angle (42.2°)of total reflection occured when light from diffuser into air can be calculated by the equation(1).Therefor, When light from the PMMA material diffuser which refractive index is into the air, when≧42.2°total reflection will be occared.
The diffuser is 960mm-long, 30mm-wide and 2mm-thick, which material isPMMA, The model is shown in Fig.2.
Acknowledgement This study was funded by the National Natural Science Foundation of China (No.51173015) and the Fundamental Research Funds for the Central Universities, ( No zz1011).
Journal of Applied Optics. 2011,32(4):613 [3] C.Y Liang.
The diffuser is 960mm-long, 30mm-wide and 2mm-thick, which material isPMMA, The model is shown in Fig.2.
Acknowledgement This study was funded by the National Natural Science Foundation of China (No.51173015) and the Fundamental Research Funds for the Central Universities, ( No zz1011).
Journal of Applied Optics. 2011,32(4):613 [3] C.Y Liang.
Online since: April 2016
Authors: Jarmila Geffertova, Anton Geffert, Blazej Seman
The Problems in Delignification of Dry Wood
by Kraft Process
Anton Geffert1,a*, Jarmila Geffertova1,b and Blazej Seman1,c
1Technical University in Zvolen, Faculty of Wood Sciences and Technology,
Department of Chemistry and Chemical Technologies, T.G.
Introduction Wood is the most widespread raw material for pulp and paper industry which causes the specific problems in its chemical processing to pulp due to its anisotropic character.
Vrška et al., Lignocelulózové materiály (Lignocellulosic materials), Part 1.
Teder, Modified kraft processes for softwood bleached grade pulps, Tappi journal, 62, 7 (1979) 49-51
Introduction Wood is the most widespread raw material for pulp and paper industry which causes the specific problems in its chemical processing to pulp due to its anisotropic character.
Vrška et al., Lignocelulózové materiály (Lignocellulosic materials), Part 1.
Teder, Modified kraft processes for softwood bleached grade pulps, Tappi journal, 62, 7 (1979) 49-51