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Online since: June 2015
Authors: Albert A. Burk, Lin Cheng, Jim Richmond, Brett Hull, Scott Allen, Vipindas Pala, J. Palmour, S. Ryu, M. O’Loughlin, E. VanBrunt
Innovation on SiC MOSFET device design and manufacturing processes continues to drive performance improvements and cost reductions.
These ongoing refinements are being implemented into next-generation SiC MOSFETs and have lead to a reduction in the specific on-resistance (Ron,sp) of 40% in a 1200 V device compared to Cree’s C2M product family.
The reductions in Ron,sp allows for smaller chips for a given device rating, leading to more chips per wafer and to higher device yields, all leading to reduced manufacturing cost per chip.
Data for References [3] and [4] are included for comparison.
These ongoing refinements are being implemented into next-generation SiC MOSFETs and have lead to a reduction in the specific on-resistance (Ron,sp) of 40% in a 1200 V device compared to Cree’s C2M product family.
The reductions in Ron,sp allows for smaller chips for a given device rating, leading to more chips per wafer and to higher device yields, all leading to reduced manufacturing cost per chip.
Data for References [3] and [4] are included for comparison.
Online since: July 2015
Authors: Claudio Giardini, Elisabetta Ceretti, Luca Giorleo
.°2: Milling curve for a Ring Rolling process
As it can be observed the diameter expansion is realized by reducing the ring width and height: width reduction is controlled by the Idle roll displacement vs the Driver roll, while the ring height is reduced by the Axial rolls movement.
The software reliability was tested by the authors in a previously work where the simulation results where compared with the experimental data [11].
However, even if a milling curve optimizing the geometric and physical parameters does not exist, it is always suggested to design milling curves by imposing a high slope of the Idle roll speed law because, by the industrial point of view, ring precision is more important than loads reduction.
[7] Giorleo L., Ceretti E., Giardini C., Energy consumption reduction in Ring Rolling processes: A FEM analysis, International Journal of Mechanical Sciences. 74 (2013) 55-64
The software reliability was tested by the authors in a previously work where the simulation results where compared with the experimental data [11].
However, even if a milling curve optimizing the geometric and physical parameters does not exist, it is always suggested to design milling curves by imposing a high slope of the Idle roll speed law because, by the industrial point of view, ring precision is more important than loads reduction.
[7] Giorleo L., Ceretti E., Giardini C., Energy consumption reduction in Ring Rolling processes: A FEM analysis, International Journal of Mechanical Sciences. 74 (2013) 55-64
Online since: March 2015
Authors: Muhammad Shoaib Khalid, Xiang Ning Lin, Jin Wen Sun, Asad Waqar, Merfat Ibrahim Okba, Samir Mohammed Dawoud
In the reference [5] the authors have investigated the reduction in fuel consumption by using diesel generator and batteries in a pv hybrid microgrid using homer software.
For environmental assessment, the pollutants emission reduction and renewable fraction (RF) is investigated.
Renewable Resources The data for solar resource was obtained from the National Aeronautics and Space Administration (NASA) Surface Meteorology and Solar Energy web site [9].
A major contribution of this paper is that the COE is decreased, the fuel consumption of diesel is saved The reduction in the quantity of different air pollutants compared with diesel-only system in rural areas in Egypt.
For environmental assessment, the pollutants emission reduction and renewable fraction (RF) is investigated.
Renewable Resources The data for solar resource was obtained from the National Aeronautics and Space Administration (NASA) Surface Meteorology and Solar Energy web site [9].
A major contribution of this paper is that the COE is decreased, the fuel consumption of diesel is saved The reduction in the quantity of different air pollutants compared with diesel-only system in rural areas in Egypt.
Online since: November 2013
Authors: Khan Zulfiqar, C.S. Ramesh, M.L. Shreeshail, Harsha R. Gudi
A uniform distribution of silicon carbide (SiC) within the matrix alloy and reduction in the size of silicon carbide particles in the hot extruded composite are observed.
This drastic reduction in the silicon carbide particle size can be attributed to the high compressive stresses during hot extrusion.
An average reduction of 30% weight loss is observed for the developed composite when compared with the matrix alloy for all the studied angle of impacts.
Harsha and Deepak Kumar Bhaskar, Solid particle erosion behaviour of ferrous and non-ferrous materials and correlation of erosion data with erosion models, Materials and Design Vol. 29, (2008) 1745–1754
This drastic reduction in the silicon carbide particle size can be attributed to the high compressive stresses during hot extrusion.
An average reduction of 30% weight loss is observed for the developed composite when compared with the matrix alloy for all the studied angle of impacts.
Harsha and Deepak Kumar Bhaskar, Solid particle erosion behaviour of ferrous and non-ferrous materials and correlation of erosion data with erosion models, Materials and Design Vol. 29, (2008) 1745–1754
Online since: December 2018
Authors: Bahram Mirzaei, Alireza Khodabandeh, Goroh Itoh
The results of tensile test data for specimens with and without hydrogen, charging is presented in Table 3.
Reduction in flatness may have affected σy, while weld defects may have affected δ, which may have been also affected by the microstructural evolution by the welding that will be described later.
In specimen M without hydrogen charging, fracture is found to occur generally in ductile manner with significant reduction in area, implying that one cause for the low δ of this specimen is in the possibility that the deformation zone is limited in a small region with respect to the gage length.
In specimen M, reduction in area is markedly decreased by hydrogen charging, although δ was decreased only by about 20%.
Reduction in flatness may have affected σy, while weld defects may have affected δ, which may have been also affected by the microstructural evolution by the welding that will be described later.
In specimen M without hydrogen charging, fracture is found to occur generally in ductile manner with significant reduction in area, implying that one cause for the low δ of this specimen is in the possibility that the deformation zone is limited in a small region with respect to the gage length.
In specimen M, reduction in area is markedly decreased by hydrogen charging, although δ was decreased only by about 20%.
Online since: February 2013
Authors: Tao Wang, Mai Cang Zhang, Zhao Li, Yu Xin Zhao, Yong Zhang, Shu Hong Fu
Strain and stress data was recorded automatically during compression.
Power dissipation map of alloy GH720Li at 50% reduction Fig. 9.
Flow instability map of alloy GH720Li at 50% reduction Hot processing map of GH720Li ingot is obtained at a strain of 50% by overlaying the flow instability area on the power dissipation map (Fig 10).
Hot processing map of alloy GH720Li at 50% reduction On the other hand, it is seen from Fig 10 that the processing map exhibits three instable areas.
Power dissipation map of alloy GH720Li at 50% reduction Fig. 9.
Flow instability map of alloy GH720Li at 50% reduction Hot processing map of GH720Li ingot is obtained at a strain of 50% by overlaying the flow instability area on the power dissipation map (Fig 10).
Hot processing map of alloy GH720Li at 50% reduction On the other hand, it is seen from Fig 10 that the processing map exhibits three instable areas.
Online since: June 2014
Authors: Xi Fang Zhu, An Cheng Xu, Qing Quan Xu, Gong Chen, Hui Yang
This article mainly deals with thickness data de-noising via multi-scale wavelet.
Vertical axis is output data.
Threshold value judgment Data Output 7-Level Wavelet 3-Level Wavelet Data Input Fig.4 Diagram of static C frame structure and moving film Fig.5 Measured data As can be seen from the diagrams, the width of coating film is narrow and appears alternatively with lithium film.
When moving speed increases, the non-stability of output data increases and the length of data gradually decreases.
However, output data at different speeds are all within film thickness range 180-190μm.
Vertical axis is output data.
Threshold value judgment Data Output 7-Level Wavelet 3-Level Wavelet Data Input Fig.4 Diagram of static C frame structure and moving film Fig.5 Measured data As can be seen from the diagrams, the width of coating film is narrow and appears alternatively with lithium film.
When moving speed increases, the non-stability of output data increases and the length of data gradually decreases.
However, output data at different speeds are all within film thickness range 180-190μm.
Online since: January 2014
Authors: Wei Lin, Cheng Bi Zhao, You Hong Tang, Xiao Ming Chen, Hai Ying Wang
In this system, structural type of cells is absorbed for cost reduction while damping configurations are used to optimize the stability of wind turbine.
This concept was put forward basically in consideration of the reduction of fabrication difficulty and cost: the cells are formed using rolling machines and welded together by automatic welding machines.
To predict the mooring line tensions, complete time-domain simulation is an essential process to obtain some important data, such as extreme values which is critical in the structural verification and other post-analysis.
This concept was put forward basically in consideration of the reduction of fabrication difficulty and cost: the cells are formed using rolling machines and welded together by automatic welding machines.
To predict the mooring line tensions, complete time-domain simulation is an essential process to obtain some important data, such as extreme values which is critical in the structural verification and other post-analysis.
Online since: March 2018
Authors: Raluca Malciu, Mădălina Xenia Călbureanu, Calin Mihnea Calbureanu
Nicolae Titulescu, 25, G2, fl.5, Craiova, Dolj, 200219, Romania
amadalina.xenia.calbureanu@gmail.com, bralucamalciu@yahoo.com, ccalin.calbureanu.c@gmail.com
Keywords: energy efficiency, healthy indoor climate, thermal rehabilitation
Abstract: This paper purpose is to provide recommendations after a thermal energy analysis and inspection of a hotel building and its related facilities, in order to increase energy efficiency saving primary resources, to ensure a healthy indoor climate for users, and last but not least to ensure a reduction of CO2 emissions in order to ensure an external environment with low pollutant emissions.
Table 1 Data from thermal energy analysis Usable area [m2] Volume [m3] Heated Volume [m3] Usable area [m2] Total energy for heating [kWh] Total energy for hot water [kWh] Total energy for ventilation [kWh] Total energy for lighting [kWh] 7160.00 17900.00 14320.00 7160.00 116,745.64 22237.26 84720.000 286,400.00 According to the bills, energy classes [3] are given in Table 2: Table 2 Energy classes for heating, domestic hot water, air conditioning, ventilation and lighting Total energy for heating [Gcal] Ventilation [MWh] Total energy for heating [kWh] qh [kWh / (m² * year)] Building energy rating for heating Total energy for hot water [kWh] qacm [kWh / (m2.year)] Building energy rating for hot water 100.40 84.72 116,745.64 16.31 A 22237.26 3.11 A qclim (air conditioning) [kWh / (m2.year)] Building energy rating for air conditioning Building energy rating for lighting Building energy rating for ventilation 11.8324 A A A Fig. 6 shows energy consumption related to the
Reducing of fresh air supply (more efficient adjustment, air quality control, using of timer and presence sensor); Reduced volumetric flow (fan power consumption); Reduction of heat losses [4] 2.
Table 1 Data from thermal energy analysis Usable area [m2] Volume [m3] Heated Volume [m3] Usable area [m2] Total energy for heating [kWh] Total energy for hot water [kWh] Total energy for ventilation [kWh] Total energy for lighting [kWh] 7160.00 17900.00 14320.00 7160.00 116,745.64 22237.26 84720.000 286,400.00 According to the bills, energy classes [3] are given in Table 2: Table 2 Energy classes for heating, domestic hot water, air conditioning, ventilation and lighting Total energy for heating [Gcal] Ventilation [MWh] Total energy for heating [kWh] qh [kWh / (m² * year)] Building energy rating for heating Total energy for hot water [kWh] qacm [kWh / (m2.year)] Building energy rating for hot water 100.40 84.72 116,745.64 16.31 A 22237.26 3.11 A qclim (air conditioning) [kWh / (m2.year)] Building energy rating for air conditioning Building energy rating for lighting Building energy rating for ventilation 11.8324 A A A Fig. 6 shows energy consumption related to the
Reducing of fresh air supply (more efficient adjustment, air quality control, using of timer and presence sensor); Reduced volumetric flow (fan power consumption); Reduction of heat losses [4] 2.
Online since: July 2024
Authors: Muhammad Saad Ifrahim, Abdul Jabbar Sangi
Also, it is observed that there is a significant reduction in deflection in post-cracking and pre-steel yielding region along with enhancement in the attributes of ductility which is beneficial for serviceability aspects.
Fig. 1 FE model with boundary conditions [2] Fig. 2 Load-deflection response for (a) series II beams and (b) series III beams, derived from experiments and numerical data [2] 3.
The figure establishes a trend which shows that there is significant reduction in deflection with an increase in replacement percentage of steel.
Fig. 1 FE model with boundary conditions [2] Fig. 2 Load-deflection response for (a) series II beams and (b) series III beams, derived from experiments and numerical data [2] 3.
The figure establishes a trend which shows that there is significant reduction in deflection with an increase in replacement percentage of steel.