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Online since: October 2012
Authors: Shi Yin, Xin Li, Fei Zhang, Hua Qiang Liu
In summary, when the edger reduction is more than 10 mm, the SSC will work.
In summary, the correct setting of the edger reduction and the taper length of the every segment are the key to SSC, and the edger reduction is more important.
Therefore, the edger reduction is one of the important factors in the SSC, and the effect of the edger reduction on the SSC must be considered.
By the FEM and according to the better data of SSC applied in the field, the SSC model can be regressed as follows: (2) Where x is the distance along the taper length from the head end or tail end; a1, a2, a3, and a4 are the multiple regression coefficient of SSC model, and the coefficient will be changed with the different kinds of steel grade, width and different rolling pass; Δf(T) is the coefficient for temperature compensation; T is rolling temperature.
(2) The edger reduction and the number of segments along the taper length are the key to SSC, and the setting value of edger reduction is more important
In summary, the correct setting of the edger reduction and the taper length of the every segment are the key to SSC, and the edger reduction is more important.
Therefore, the edger reduction is one of the important factors in the SSC, and the effect of the edger reduction on the SSC must be considered.
By the FEM and according to the better data of SSC applied in the field, the SSC model can be regressed as follows: (2) Where x is the distance along the taper length from the head end or tail end; a1, a2, a3, and a4 are the multiple regression coefficient of SSC model, and the coefficient will be changed with the different kinds of steel grade, width and different rolling pass; Δf(T) is the coefficient for temperature compensation; T is rolling temperature.
(2) The edger reduction and the number of segments along the taper length are the key to SSC, and the setting value of edger reduction is more important
Online since: August 2013
Authors: Shu Qing Zhang, Xiu Ling Lv, Na Hui Zhang, Li Hong Zhang
Based on the viscosity determination of ChengGang BF slag[2], the viscosity data obtained are analyzed by using the Minitab software in order to find the relationship between these data and obtain the influence of various factors on slag viscosity further.
At present, it has been widely used in process quality control, experimental data analysis, etc [3-4].
When using Minitab software to analyze data, the statistical test conclusion is the P (Probability) values.
The above data presents that there are significant difference for the slag liquidity between 1~3 groups and 4~5 groups.
Conclusions Single factor variance analysis of experimental data of slag viscosity was carried on using Minitab software, which verifies the correctness of using Minitab software to process a large quantity of experimental data.
At present, it has been widely used in process quality control, experimental data analysis, etc [3-4].
When using Minitab software to analyze data, the statistical test conclusion is the P (Probability) values.
The above data presents that there are significant difference for the slag liquidity between 1~3 groups and 4~5 groups.
Conclusions Single factor variance analysis of experimental data of slag viscosity was carried on using Minitab software, which verifies the correctness of using Minitab software to process a large quantity of experimental data.
Online since: April 2016
Authors: Krzysztof Lipiński
Performed tests proofed that signal of the proportional-derivative controller is a useful data base for the required identification process.
They allow us to identify the mass of the payload and to improve data in the model-based controller.
The signal obtained form the PD feedback loop is used as a data base for identification of the payload inertia.
Resulting torques (i.e., the output data of the second sub-block) are considered as the input data of the sub-block devoted to model the plant (the controlled object).
Steinbuch, Data-based spatial feedforward for over-actuated motion systems, Mechatronics 24 (2014) 679–690; [3] M.J.C.
They allow us to identify the mass of the payload and to improve data in the model-based controller.
The signal obtained form the PD feedback loop is used as a data base for identification of the payload inertia.
Resulting torques (i.e., the output data of the second sub-block) are considered as the input data of the sub-block devoted to model the plant (the controlled object).
Steinbuch, Data-based spatial feedforward for over-actuated motion systems, Mechatronics 24 (2014) 679–690; [3] M.J.C.
Online since: July 2021
Authors: Danielle Ferreira dos Santos, Bluma Guenther Soares
The first heating scan was employed to obtain the curing data.
The plastifying effect of the ionic liquid resulted in the reduction of the final dynamic-mechanical properties of the systems.
Figure 4 shows that the increase in the ionic liquid content influenced the reduction of the maximum curing temperature.
The reduction in Tg in the greater presence of IL confirms its plasticizer effect.
Table 1 organizes the cure and Tg data.
The plastifying effect of the ionic liquid resulted in the reduction of the final dynamic-mechanical properties of the systems.
Figure 4 shows that the increase in the ionic liquid content influenced the reduction of the maximum curing temperature.
The reduction in Tg in the greater presence of IL confirms its plasticizer effect.
Table 1 organizes the cure and Tg data.
Online since: October 2011
Authors: Qi Zhen Liu, Yan Jing Sun, Fang Wan
Dry basis technology includes selective non-catalytic reduction (SNCR), selective catalytic reduction (SCR) and electron beam desulfurization and denitrification; Semi-dry basis technology includes active carbon desulfurization and denitrification; Wet basis technology includes ozone oxidation and absorption, etc.
(Guan et al., 2004; Liu, 1996) Based on continuous emissions monitoring data, this paper studies on a one-million kW capacity unit with air-fragment low-nitrogen combustion technology combine with SCR and puts forward relevant policies and suggestions for the problems of the application of NOX control technology.
According to the continuous emissions monitoring data, the integrated denitrification efficiency of SCR only amounted to 55% in 2009.
Selective catalytic reduction of fuel gas denitrification technology and its application research in our country, Power environmental protection, Vol.20 (1) (2004),p. 19-21(In Chinese)
Applications of selective catalytic reduction SCR denitrification technology in boilers of power plan,.
(Guan et al., 2004; Liu, 1996) Based on continuous emissions monitoring data, this paper studies on a one-million kW capacity unit with air-fragment low-nitrogen combustion technology combine with SCR and puts forward relevant policies and suggestions for the problems of the application of NOX control technology.
According to the continuous emissions monitoring data, the integrated denitrification efficiency of SCR only amounted to 55% in 2009.
Selective catalytic reduction of fuel gas denitrification technology and its application research in our country, Power environmental protection, Vol.20 (1) (2004),p. 19-21(In Chinese)
Applications of selective catalytic reduction SCR denitrification technology in boilers of power plan,.
Online since: March 2015
Authors: Le Hui Huang, Miao Miao Li
After long-playing research and continuous comparison with historical data, meteorologists recognize that the causes determining the climate state and change don’t exist in the atmosphere, but depend on overall interaction of climate system composed of the air, water, ice, rock, and other several major factors.
Relevant data shows that, if the carbon dioxide concentration increases one time, the average temperature of global surface will rise 1.5~3.5℃.
Reduction or disappearance of vegetation and marine plankton reduces carbon dioxide stored in plants and used for photosynthesis, so as to make the greenhouse gases and global temperature increase further.
Because the forest has these special features in addressing climate change, “Kyoto Protocol” sets two ways: industrial direct reduction and forest indirect reduction.
Energy-saving and emission reduction and climate change also needs the participation of the whole people.
Relevant data shows that, if the carbon dioxide concentration increases one time, the average temperature of global surface will rise 1.5~3.5℃.
Reduction or disappearance of vegetation and marine plankton reduces carbon dioxide stored in plants and used for photosynthesis, so as to make the greenhouse gases and global temperature increase further.
Because the forest has these special features in addressing climate change, “Kyoto Protocol” sets two ways: industrial direct reduction and forest indirect reduction.
Energy-saving and emission reduction and climate change also needs the participation of the whole people.
Online since: December 2014
Authors: Luiz Gustavo Martins Vieira, Marcos Antonio de Souza Barrozo, Fernanda Falqueto Salvador, Danylo de Oliveira Silva
According to the main results [6], based on experimental data and Computational Fluid Dynamics (CFD) studies, it was concluded that it was possible to combine in a single device, high separation efficiencies with low Euler numbers (Eu).
In turn, the anticlockwise rotation has also played a favorable effect on the Euler number, with average reductions 12.3% compared to conventional separator H11 (0 rpm).
The smallest Euler number was reached when the largest anticlockwise rotation was used in hydrocycloning (3000 rpm) leading to a reduction of approximately 17.1% in the analyzed response.
According to the experimental data of underflow-to-throughput ratio for the hydrocyclone under study, it can be seen that neither the direction nor the intensity of rotation has played significant effect in this response.
In turn, the clockwise rotation played an adverse effect on the overall efficiency, with an average reduction around 18.3%.
In turn, the anticlockwise rotation has also played a favorable effect on the Euler number, with average reductions 12.3% compared to conventional separator H11 (0 rpm).
The smallest Euler number was reached when the largest anticlockwise rotation was used in hydrocycloning (3000 rpm) leading to a reduction of approximately 17.1% in the analyzed response.
According to the experimental data of underflow-to-throughput ratio for the hydrocyclone under study, it can be seen that neither the direction nor the intensity of rotation has played significant effect in this response.
In turn, the clockwise rotation played an adverse effect on the overall efficiency, with an average reduction around 18.3%.
Online since: May 2012
Authors: Yan Zhao Li, Chang Sheng Guan, Qing Hua Cai, Jin Ming Zhai
Discuss on application of GSHP in highway frozen disaster reduction
There are a lot of traffic accidents and jams on the highway surface every winter because of the disaster of frozen raining and snow, which seriously disturbs our normal working and living orders.
Collecting and arranging the newest research achievements of GSHP at home and abroad, analyzing the study status and developing trend and problems to be solved on GSHP, carrying out the experimental study of ground thermal properties of GSHP, establishing the database of ground thermal properties at different areas geological conditions, providing the basic data for the theoretical analysis and design of GSHP heating exchanger. 2.
Studying the high effective, reliable and practical heat exchanging system of GSHP used for highway surface warm keeping and frozen disaster reduction, researching the real time heat exchanging mechanism of GSHP heat exchanger, establishing the heat exchanging distribution law that is accordance with the actual case, providing the practical model for the theoretical analysis and design of GSHP heating exchanger, determining reasonably the components of GSHP used for highway surface thermal insulation and frozen disaster reduction. 3.
According to the structure features of the highway surface, viaduct and overpass, studying the construction technology and long time testing controlling techniques and maintaining method of GSHP used for highway surface thermal insulation and frozen disaster reduction. 5 The key parts of the GSHP air condition system is the efficiency of the ground source heat exchanger, to match the economic and practical requirement, the field geological thermal properties data must be mastered accurately. 6 To test the practical effect of the GSHP used for highway surface thermal insulation and frozen disaster reduction by experimental methods.
Conclusion The most areas in north China have the snowing weather in winter, the requirement for highway surface thermal insulation and frozen disaster reduction is very huge.
Collecting and arranging the newest research achievements of GSHP at home and abroad, analyzing the study status and developing trend and problems to be solved on GSHP, carrying out the experimental study of ground thermal properties of GSHP, establishing the database of ground thermal properties at different areas geological conditions, providing the basic data for the theoretical analysis and design of GSHP heating exchanger. 2.
Studying the high effective, reliable and practical heat exchanging system of GSHP used for highway surface warm keeping and frozen disaster reduction, researching the real time heat exchanging mechanism of GSHP heat exchanger, establishing the heat exchanging distribution law that is accordance with the actual case, providing the practical model for the theoretical analysis and design of GSHP heating exchanger, determining reasonably the components of GSHP used for highway surface thermal insulation and frozen disaster reduction. 3.
According to the structure features of the highway surface, viaduct and overpass, studying the construction technology and long time testing controlling techniques and maintaining method of GSHP used for highway surface thermal insulation and frozen disaster reduction. 5 The key parts of the GSHP air condition system is the efficiency of the ground source heat exchanger, to match the economic and practical requirement, the field geological thermal properties data must be mastered accurately. 6 To test the practical effect of the GSHP used for highway surface thermal insulation and frozen disaster reduction by experimental methods.
Conclusion The most areas in north China have the snowing weather in winter, the requirement for highway surface thermal insulation and frozen disaster reduction is very huge.
Online since: August 2014
Authors: Xi Gui Wang, Yong Mei Wang
Device of lubricating oil temperature control principle of reduction gear
In this experiment, temperature control by closed loop PID control, temperature is controlled by the controller, solid state relay, heaters and temperature transmitter.
Device of lubricating oil temperature control principle block diagram as shown in Fig. 1 reduction gear.
Fig. 1 Device of lubricating oil temperature control principle block diagram reduction gear The following discusses the realization of temperature control.
Device of lubricating oil temperature control main program flow chart as shown in Fig. 4 reduction gear.
Marine gear reducer design device of lubricating oil temperature control system Table 2 PID loop parameters Address Data Address Data unit VD101 Actual temperature value VD111 Sampling time 0.5s VD102 Set temperature value VD112 Integral time min VD103 Proportional coefficient VD113 Differential time min Analysis of the balance of oil temperature sliding device of reduction gear.
Device of lubricating oil temperature control principle block diagram as shown in Fig. 1 reduction gear.
Fig. 1 Device of lubricating oil temperature control principle block diagram reduction gear The following discusses the realization of temperature control.
Device of lubricating oil temperature control main program flow chart as shown in Fig. 4 reduction gear.
Marine gear reducer design device of lubricating oil temperature control system Table 2 PID loop parameters Address Data Address Data unit VD101 Actual temperature value VD111 Sampling time 0.5s VD102 Set temperature value VD112 Integral time min VD103 Proportional coefficient VD113 Differential time min Analysis of the balance of oil temperature sliding device of reduction gear.
Online since: March 2023
Authors: Femiana Gapsari, Riduwan Prasetya, Andoko Andoko
The stress shows that the applied load does not because fracture based on the theory of maximum normal stress and Mohr's criteria, the location of the highest and lowest stresses is not in the fault area, and fatigue life without defects produces infinite cycles or will not fail, and fatigue life simulation with defects results in a reduction in life.
The results displayed at this stage and selected as analysis data are values and distribution of maximum normal stress, minimum normal stress, fatigue life by Goodman and Gerber, and fatigue life due to cracking.
When compared with the simulation without defects the reduction in life is very significant, with the same loading.
Crack Size vs Cycles Conclusion Based on the parameters that have been simulated, the stress shows that the applied load does not because fracture based on the theory of maximum normal failure and Mohr's criteria, the location of the highest and lowest stresses is not in the fault area, fatigue life without defects produces infinite cycles, and simulation of fatigue life with a defect result in a reduction in life.
The results displayed at this stage and selected as analysis data are values and distribution of maximum normal stress, minimum normal stress, fatigue life by Goodman and Gerber, and fatigue life due to cracking.
When compared with the simulation without defects the reduction in life is very significant, with the same loading.
Crack Size vs Cycles Conclusion Based on the parameters that have been simulated, the stress shows that the applied load does not because fracture based on the theory of maximum normal failure and Mohr's criteria, the location of the highest and lowest stresses is not in the fault area, fatigue life without defects produces infinite cycles, and simulation of fatigue life with a defect result in a reduction in life.