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Online since: July 2022
Authors: Anatolii Kodrik, Oleksandr Titenko, Andriy Borisov, Sergiy Zhartovskyi, Andriy Shvydenko
The results of experimental and calculated data are presented in Table 4.
The system of equations with respect to the variable d – values of the diameter of the droplet is solved by numerical methods, the data obtained are entered in the column "Effective diameter of the droplet" Table 4.
To obtain a quantitative estimate of the reduction of evaporation of extinguishing agents based on gels during their delivery to the fire, equation that calculates the coefficient of reduction of mass evaporation during their delivery to the fire was used: , (7) where dH, dW – diameters of drops, respectively, in a stream of gel and in a stream of water, according to the data in the column "Effective diameter of a drop" of Table 5, mm; ωH, ωW – droplet velocities, respectively, in the gel jet and in the water jet, according to the data in the column "Effective jet velocity" Table 5; kevap_stat = 0.89 – evaporation coefficient, the value of which is experimentally determined.
The results of experimental studies to assess the reduction of evaporation of extinguishing agents based on gels
Dependence of ignition time and size of the film on the surface on the type of extinguishing agent and the concentration of the aqueous solution of the polymer-based gelling agent according to the method of DSTU 8829-2016 1 – Experimental data.
Online since: December 2011
Authors: Kamal Ait Tahar, S. Bouaziz
The profit of weight, which can be more or less important according to the type of concrete, involves a reduction in the sections of the elements structural ensuring the load transfer.
One of the possible ways of reduction for the concrete is the replacement of the usual aggregates, which constitute approximately the 3/4 of the mass of the concrete, by lightweight aggregates, natural or artificial.
The profit of weight, which can be more or less important according to the type of concrete, involves a reduction in the sections of the elements structural ensuring the load transfer.
(2) Where: ; The data concerning the different parameters used in this study are given by the table 3.
Parameters values used Data Ri (mm) () R1 R2 R3 1,5 1,55 1,55- 3 0,35 0,50 The calculated results give the median value of the thermal conductivity of the elaborate aggregate is of .
Online since: October 2013
Authors: Lie Zhun Wang, Zi Qing Liu
Project research pioneered the use of computer integrated manufacturing system in the same industry, the products of the project by making use of computer aided design and database management system in the design, including the establishment of a comprehensive database design, motor test, standard, material, structure and other data; use some of the basic graph element and drawing software, drawing motor design in the computer, establishing the database, the computer aided design system design, analysis, calculation, drawing, through the information flow and computer aided manufacturing system, organically into a whole, forming a computer integrated manufacturing system.
This combination of comprehensive database for standard parts, materials, structure, test should meet the performance data standards, through the information flow and computer aided manufacturing system of AC, obtain a better design scheme.
And the whole machine assembly, the gap between the stator and rotor (uniform air gap) is relatively uniform, comply with the design requirements, the operation of the electric motor magnetic force field uniform, and electromagnetic noise reduction are good.
The wind friction loss is mainly composed of fan power consumption which, because of increased efficiency, reduces the heat load, without increasing the temperature rise, the motor required air volume can be reduced, so the fan size can be reduced, so that the ventilation loss reduction, shown in Fig.6 is the fan blade design structure improvement.Fig.7 shows the structure of fan blade originally used in project, product use, influence on the temperature rise and the efficiency of the motor is large, the efficiency of 90.92%, temperature 73.4K, 89.4dB modified noise; fan shape does not change the diameter, width, test efficiency is 91.59%, temperature 67.1K, noise 87.2dB; the smaller diameter 20mm, efficiency 91.72%, temperature 61.5K, noise 84.7dB[3,4].
With IEC efficient (IE2), high efficiency (IE3) of [J] loss reduction measures motor efficiency levels.
Online since: December 2016
Authors: Nizar Jawad Hadi, Dhey Jawad Mohamed
Polymer rheological data is used in determining whether or not a type of polymer can be extruded, molded or shaped into a practical and useable product.
The flexible and ductile structure of the polymer chains are obtained due to the reduction in shear viscosity.
The melt density is a very important data for numerical simulation study of rheological and flow behaviour of polymer melts.
The reduction in intermolecular forces decreases the storage modulus and increases the impact resistance.
The reduction in viscosity due to the alignments of polymer chains may be improved the hardness.
Online since: October 2006
Authors: Jin Ho Park, Yang Hann Kim
Noise reduction technique When a transient signal is mixed with a stationary random noise, the conventional noise cancellation techniques are not available.
Experiment and simulation Figure 4 illustrates the data acquisition system and the signal flow of the impact response signals for an 1/8 reactor mock-up model whose lower part has the form of a half spherical shell.
Therefore a noise reduction is indispensable to cope with this problem.
Also a noise reduction technique by using a smoothed Wigner-Ville distribution has been proposed.
Piersol, Random Data Analysis and Measurement Procedures, John Wiley & Sons Inc. 3rd ed., pp.86-90, 2000
Online since: June 2016
Authors: Hendry Sakke Tira, Ahmad Alfan Syahida, Yesung Allo Padang, Tri Rachmanto
According to the results, one of the factors which reduce the water scrubbing method performance is the reduction of absorbent pH.
The data was taken continuously for 45 minutes started from minute 31 [7].
Data from minute 1 – 30 were not showed as the methane content of the purified biogas still very low.
Relatively strong base level of absorbent attributed as the main factor for CO2 reduction.
Compared than raw biogas, there was at maximum of 80% reduction of H2S in purified biogas.
Online since: July 2022
Authors: Anton Tsaritsynskyi, Andrii Kondratiev, Tetyana Nabokina, Vladimir Kochanov, Tetyana Yuresko
On the whole, this data indicates the insufficient effectiveness of the known approaches to the prevention and prediction, based mainly on the physical phenomenon of heat and mass transfer under appropriate conditions [16, 17].
It results in the decrease in the molecular weight of the polymer, reduction of impact resistance and ultimate tensile strain [38].
(6) Essentially, condition (6) represents the formula of extrapolation forecast of durability according to the data of accelerated heat aging.
Reduction of the operating temperature to 0ºC increases the service life to 46 years.
Stanley, Window Seat Weight Reduction Exploration With Nontraditional Seat Geometry, Marine Techn.
Online since: January 2014
Authors: Renata Dwornicka
Such an approach leads to an increase of overall efficiency of the power unit and, as a result, to the reduction of environmental burden, with the same amount of the energy obtained.
To determine such data, there is necessary to conduct real experiments and simultaneously stress-strain modeling considering issues of thermoelasticity and thermoplasticity by FEM methods [21] or even microscale methods basing on randomized simulation like Monte Carlo modeling [22, 23], DoE-based [24] surrogate modeling [25] or the adjustment calculus [26].
The savings translate into both a reduction in coal consumption and lower fuel costs.
An important gain, from an ecological point of view, is also saving in water consumption and sewage discharge as well as the reduction of noise emissions associated with start-ups.
Pietraszek, Numerical modeling of non-steady-state temperature fields with supplementary data, Z.
Online since: May 2012
Authors: Xiang Chao Hou, Lu Jie Zhu
The article adopted index method in time-series flat forecast when predicting data that can be arranged in a time-series [5].
First, it doesn’t need to store a lot of historical data.
Second, data of different period is weighted in the model.
Table 6 gives the predicting data for residential electricity consumption strength, which are in different technical level from 2010 to 2050.
According to the data in Table 1, future electricity consumption per unit area is predicted by secondary exponential smoothing method.
Online since: October 2007
Authors: Kouichi Maruyama, Masaaki Igarashi, Kyosuke Yoshimi, Hassan Ghassemi Armaki, Mitsuru Yoshizawa
Long term creep strength of the steels is evaluated from short term creep data by time-temperature parameter (TTP) methods based on temperature dependence of rupture life.
(2)) is unique for a set of creep rupture data to be analyzed.
Creep Rupture Behavior Creep rupture data of the same steel are given in Fig. 1 (b).
Correlation between Hardness Drop and Breakdown of Creep Strength Creep rupture data of steels S9, S10 and D12 tested at 650 oC are plotted in Fig. 2 (b).
This fact results in faster reduction of hardness observed in higher Cr steels.
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