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where: ao - is a stress for ith part ofthe shell continuing to take the load; fo — a cross section area of ith part ofthe shell without stability loss; y.g— the distance from the center of gravity of i th part to the center of gravity of shell section; , f, y. — the same, respectively, for reinforcing panels.
Calculations on strength and stability of tower-type structures in the form of cylinder shell reinforced along generatrix by circular panels developed according to proposed methods, give satisfactory results and may be applied in design and projecting of similar structures.
References:
1. Building Code (Building Norms and Rules 2.03.05-97 "Steel Structures. Norms of Design"). - Tashkent, 1998. - 117 p.
2. Designer Manual. Design-theoretical. Edited by A. A. Umansky. Moscow, State Publ. On construction, architecture and building materials. - Moscow, 1960. - 1040 p.
3. Akramov Kh. A., Davlyatov Sh. M. Calculation of stability and load-carrying capacity of cylindrical steel shells backed//Mechanics problems. - Tashkent, 2015. - № 3-4. - P. 20-26.
4. Akramov Kh. A., Davlyatov Sh. M. Calculation of the stability and the bearing capacity of circular cylindrical steel panels, clamped along the longitudinal edges in the central and eccentric compression//Architecture Building Design. - Tashkent, 2015. - № 4. - P. 24-29.
Kadirov Kamoliddin Shuxratovich, Institute of Power Energy and Automation of Academy of Sciences of the Republic of Uzbekistan, Senior research associate-applicant E-mail: kamoliddin.8484@mail.ru Yusupov Dilmurod Turdaliyevich, Institute of Power Energy and Automation, Junior researcher E-mail: dilmurod85@list.ru
Analysis of the modes of the power consumption the enterprises for the purpose of detection of advantages of use of the differentiated tariff for the electric power
Abstract: In article results of the analysis of the hour, daily, monthly, quarter and annual modes of an expense of the electric power the textile enterprise "Fergana Turon Textile" are given. Tool measurements for definition of the hour mode of electricity consumption the enterprise are carried out. Data on a power consumption of the enterprise for 2013-2015 years are obtained and analysed, and defined dynamics of change of the monthly, quarter and annual modes of a power consumption. Analyses have shown electricity consumption growth the enterprise in recent years.
Keywords: textile industry, electric energy, mode of the power consumption.
The textile industry of Uzbekistan is one of the developing directions of the country. Rational use of the electric power at such industrial enterprises, first of all, depends on his effective use during the work of separate industrial systems and technological installations. Characteristics of technological process of textile production is: its multigradualness, various power consumption of processing equipment, a large number of the factors influencing him, the width of the range of raw materials, semi-finished products and finished goods.
Therefore the power consumption on each this production, being difficult function of many variables, can sharply change at the same values of total amount of products. These factors complicate the accounting of an expense of the electric power that leads to his uncontrolled expenditure. Communications with it, to actual tasks saving and rational use of electric energy in the textile industry is.
The purpose of this article is carrying out the analysis of the hour, daily, monthly and quarter and annual modes of a power consumption of the textile enterprise LLC "Fergana Turon Textile". This enterprise is engaged in production of knitted products.
Today in the textile industry of our republic the main are cotton, silk and sewing and knitted branches. The most power-intensive types ofproduction in the textile industry — cotton and silk fabrics
for which production more than 68 % of the electric power [1] used in branch are spent (table 1).
Table 1. - Consumption of electric power in the textile industry
Type of fabric Share of consumption of the electric power, %
Cotton 42.5
Silk 25.7
Others 31.8
The main consumers of the electric power in the textile industry are electric equipments which are used in technological process of production (combing cars, pneumospinning cars, reeling cars, weaving looms, cars of periodic action, the automated flowing lines and others), ventilation and lighting (table 2) [2].
Table 2. - Main consumers of the electric power
Consumer Share of the general consumption of electric power, %
Technological process 63.0
Ventilation 13.9
Lighting 14.3
Auxiliary needs 8.8
Analysis of the modes of the power consumption the enterprises for the purpose of detection of advantages.
In results of research of a power consumption for 2015 LLC "Fergana Turon Textile" is defined that the electric power makes the main share, i. e. about 50-55 % ofthe general energy consumption the enterprise.
Also carried out analysis of financial expenses of the enterprise for energy resources in 2015 has shown that more than a half of all expenses is the share of the electric power.
Authors have conducted tool examinations by means of the modern device by the AR-5 electro analyzer for the purpose of
definition of the sentry electricity consumption within a week. Apparently from figure 1, electricity consumption distribution unevenly. Change of hour electric power in a week made from 1061 kW. on 1268 kW. Average power in a week made 1172 kW. Electricity consumption in night time generally is less days than day than time days. The minimum electricity consumption was observed from 04:00 for 09:00 hour of time days. From 11:00 for 20:00 hour of time days the maximum electricity consumption was observed.
Fig. 1. Dynamics of change of the hour mode of a electric power consumption of the textile enterprise
The daily mode of electricity consumption by the enterprise is given in figure 2. The maximum electricity consumption was on Tuesday (29 469 kW-h), and minimum — on Sunday (27 038 kW-h). The average power consumption in a week was 28147 kW-h. Change of a daily power consumption in a week was observed ranging from 591 kW-h to 2 431 kW-h.
and maximum — 2030 083 kW-h. On average the enterprise it was consumed by 1 388 823 kW-h electric power in one month. Change of monthly power consumption within three years was observed ranging from 148 193 kW-h. to 1 817 204 kW-h. The main electricity consumption the enterprise falls on the summer period.
Fig. 2. Daily mode of a power consumption of the textile enterprise
Necessary data on a power consumption of the textile enterprise for 2013-2015 are obtained and defined dynamics of change of the monthly, quarter and annual modes of power consumption.
Dynamics of change of the monthly mode of a power consumption of the textile enterprise is given in figure 3. The minimum monthly power consumption in three years has made 212 879 kW-h,
Fig. 3. Dynamics of change of the monthly mode of a power consumption of the textile enterprise
Dynamics of change of the quarter mode of a power consumption of the textile enterprise is given in figure 4. Distribution of electricity consumption on quarters unevenly. The minimum quarter
power consumption in three years I have made 2 216 166 kW-h., and maximum — 5 444 309 kW-h. On average the enterprise it was consumed by 4 166 469 kW-h. the electric power in one quarter. Change of a quarter power consumption within three years was observed ranging from 211 937 kW-h. to 3 228 143 kW-h. The main electricity consumption the enterprise is the share on the second and third quarters of year. Every year on the fourth quarter the enterprise spends the minimum electric power.
L
uttIT
2013 year 12014 year 2015 year
Fig. 4. Dynamics of change of the quarter mode of a power consumption of the textile enterprise
Dynamics of change of the annual mode of a power consumption of the textile enterprise is given in figure 5. The minimum annual power consumption in three years I have made 15 962 583 kW-h. (in 2013), and maximum — 17 792 181 kW-h. (in 2015). On average the enterprise it was consumed by 16 665 875 kW-h. electric power in a year. Apparently on drawings, in recent years the enterprise observes electricity consumption growth.
kWh
20000000 17500000 15000000 12500000 10000000 7500000 5000000 2500000 0
m
2013 year
2014 year
2015 year
Fig. 5. Dynamics of change of the annual mode of a power consumption of the textile enterprise
Conclusions:
1. The carried-out tool measurements, have shown uneven electricity consumption in the hour mode. Also was defined that electricity consumption in night time of day is more than day than time days.
2. The daily allowance of the mode of electricity consumption the enterprise averaged 28 147 kW-h.
3. Dynamics of change of the monthly mode of a power consumption of the enterprise has shown that the main electricity consumption falls on the summer period.
4. The main electricity consumption the enterprise is the share on the second and third quarters of year. Every year the enterprise spends the minimum electric power on the fourth quarter.
5. In recent years the enterprise observes growth of electricity consumption.
6. It is necessary to look for possibilities of the differentiated tariff on the electric power, for the purpose of minimization of financial expenses on energy resources.
References:
1. Allayev K. R., Hoshimov F. A. Energy saving at the industrial enterprises. - Tashkent, 2011. - P. 55-58.
2. Trofimov A. N. Organization of management of a power consumption of the textile enterprise. Dissertation. - Kostroma, 2007.
Kambarova Nigora, Tashkent State agrarian University, assistant, the faculty of agroengineering, Uzbekistan E-mail: komil_uzmei@mail.ru
Еffectiveness of using by repairable disked extractor and spindles
Abstract: In the article the results of the theoretical research are provided which are about determining of the effectiveness of using by repairable disked extractor and spindles.
Keywords: horizontal spindly cotton picker machine, disked extractors, spindles, harvest.
The developed disked extractors and spindles were installed to horizontal spindly cotton picker machines and they were analyzed as a example in Yangiyul MTP AJ.
Since 2006 Yangiyul OSC branches in Tashkent and Syrdarya exploit on the contract basis 5 "Case-2022" machines imported from USA. Analyzing maintenance and other expenses during 2010 machine harvesting season on 1 hectare annual revenue and the terms of the aforementioned expenses covering is derived with the help of the equation below:
TCT = P =10150 0.089year, (1)
CT E 42785
where: TCT — is expenses reserve recovery time-frame, year;
P — Net profit of the company, year;
E — Overall expenses during a cotton harvesting season, sum.
HSM modernization will increase the annual expense-profit as before because of extreme wear-and-tear disked extractors with elastic cogs were replaced by new ones. It was made certain that the disked extractors equipped with replaceable cogs in "Case-2022" machines should be made of simple St 3 steel instead colored aluminum as in the US, as it will ensure considerable economical and technical benefits [1; 2].
