scholarly journals Method of Determining the Required Number of Technical Backup Area Posts

2017 ◽  
Vol 44 (1) ◽  
pp. 81-96
Author(s):  
Klaudiusz Migawa ◽  
Maciej Woropay ◽  
Maciej Gniot ◽  
Monika Salamońska
Keyword(s):  
Operation System ◽  
Group Of Units ◽  
Complex Operation ◽  
Calculation Results ◽  
Typical Calculation

Abstract In complex operation systems, the processes of rendering technical objects roadworthy are carried out at specifically designed technical backup area posts. The article presents the method of defining the number of technical backup area posts required for appropriate functioning of assigned service and repair task. Then typical calculation results are presented in charts prepared on the basis of data obtained from tests at existing transport means operation system. The presented method makes it possible to analogically determine the minimum required number of posts for carrying out the assigned service and repair task for both a subsystem comprised of a group of units a given group of posts or an individual post in traffic maintenance and intervention subsystems.

scholarly journals The method of assessment and formation the availability of the subsystem ensuring fitness for means of transport

2019 ◽  
Vol 302 ◽  
pp. 01003
Author(s):  
Sylwester Borowski ◽  
Anna Mazurkiewicz ◽  
Magda Czyżewska
Keyword(s):  
The State ◽  
Operation System ◽  
Complex Operation ◽  
Calculation Results ◽  
Method Of Assessment ◽  
Typical Calculation

In systems of means of transport operation in order to achieve appropriate completion of assigned transportation tasks it is necessary to maintain a required number of means of transport in the state of availability for carrying out of transportation task (roadworthy and stocked). In general, the processes of rendering vehicles roadworthy are connected to supplying them with fuel and operational materials, carrying out services and repairs, condition diagnostics. In the analyzed system of transport means operation, the processes are carried out in serviceability assurance subsystem SAS. In complex operation systems, the processes of rendering technical objects roadworthy are carried out at specifically designed technical infrastructure posts. The possibility of carrying out the assigned service and repair tasks depends on the availability and the number of such posts. The article presents the method of defining the operational availability and the number of technical infrastructure posts required for appropriate functioning of assigned service and repair task. Then typical calculation results are presented in charts prepared on the basis of data obtained from tests at existing transport means operation system.

An Investigation of Deterministic Realistic Method for LBLOCA Mass and Energy Release Evaluation for CPR1000 NPPs

2013 ◽  
Author(s):  
Jianshu Lin ◽  
Chengjun Zhuang ◽  
Jinzhen Leng ◽  
Ting Wang ◽  
Zhenhua Zhang
Keyword(s):  
Energy Release ◽  
Conventional Method ◽  
Safety Analysis ◽  
New Method ◽  
Nuclear Technology ◽  
Complex Operation ◽  
Calculation Results ◽  
Conservative Result ◽  
Containment Pressure

With the development of nuclear technology, safety analysis methodologies were advancing from traditional conservative to more realistic approaches. For CPR1000-type NPP, the Conventional Method (CM) which employed MEDUSE, PERSEE and REFLET codes in order was still in use to evaluate the LB LOCA mass and energy release (MER). This complex operation yielded excess conservative result as well as inconvenience. Meanwhile, a deterministic realistic method (MDR) had been applied using Realistic code CATHARE GB for LB LOCA MER analysis in EPR design. In this paper, CPR1000 NPP LB LOCA MER calculation was carried out using MDR method with CATHARE GB code. Calculation results were compared with those obtained through the conventional method to assess the containment pressure margin gain. Further effort was needed to evaluate the feasibility of implementing the new method in CPR1000-type NPP applications.

A new analysis of recuperative gas turbine cycles

1998 ◽  
Vol 212 (4) ◽  
pp. 289-296 ◽  
Author(s):  
R Cai
Keyword(s):  
Heat Transfer ◽  
Gas Turbine ◽  
Pressure Ratio ◽  
Optimum Pressure ◽  
Calculation Results ◽  
New Criterion ◽  
Gas Turbine Cycle ◽  
Cycle Efficiency ◽  
Analytical Expressions ◽  
Typical Calculation

It is shown that the classical recuperator effectiveness is not an appropriate evaluation criterion for the gas turbine recuperator or a suitable independent thermodynamic parameter of the recuperative gas turbine cycle. Another parameter—the average heat transfer temperature difference in the recuperator—is recommended as the new criterion instead of the recuperator effectiveness. Therefore, the original classical analysis results of the recuperative gas turbine cycle are also inappropriate and it is necessary to give a new analysis. In this paper, the analytical expressions of the simple recuperative cycle efficiency and the optimum pressure ratio based on the new criterion are derived from general simplified assumptions. Some typical calculation results are also presented. With this new criterion, the optimum pressure ratio values for efficiency of a simple recuperative gas turbine cycle do not vary very much with the temperature ratio and are approximately equal to 3, much lower than the figures generally recognized before. A similar analysis for the recuperative gas turbine cycle with intercooler and reheater and an analysis ensuring approximately constant recuperator heat transfer area per unit power output are given also.

Thermodynamic Performance Analyses of Mixed Gas-Steam Cycle (2): A Case Study of Aeroderivative Gas Turbine

1998 ◽  
Author(s):  
Kirk Hanawa
Keyword(s):  
Gas Turbine ◽  
Steam Injection ◽  
Methanol Conversion ◽  
Combined Cycle ◽  
Mixed Gas ◽  
Kalina Cycle ◽  
Calculation Results ◽  
Gas Turbine Cycle ◽  
Typical Calculation

There are a plenty of proposals to aim the gas turbine cycle thermal efficiency of 60%, such as “Steam-Cooled H-Tech. Combined Cycle”, “Methanol Conversion Regenerative Gas Turbine”, “Kalina Cycle” etc.*1, *2, *4, *5, *6, *7 This paper discusses the predicted performance behaviors of an assumed aircraft-derivative GT of 60MW, when applying into mixed gas-steam cycles like STIG, ISTIG(Intercooled Steam Injection GT) with reasonable minor modifications from the assumed gas turbine. By making case studies of steam-injected binary cycles according to the established analyses method in Part (1), typical calculation results for getting 60% efficiency are presented. The water-injected at LPC, ISTIG cycle is equivalent or superior to other improvement ideas, offering several features listed below. 1) Unnecessary to have a bottoming cycle, saving a lot of investment for the related equipment 2) Quick and stable response for changing duty load, by injecting metered water and steam without air holding vessels like water-cooled heat exchangers

Tax maneuver in the oil industry: Provisional results and risks for further implementation

2020 ◽  
pp. 28-43
Author(s):  
A. S. Kaukin ◽  
E. М. Miller
Keyword(s):  
Oil Industry ◽  
Oil Products ◽  
Oil Refining ◽  
State Budget ◽  
Tax Rate ◽  
Oil Companies ◽  
Reform Plan ◽  
Alternative Variant ◽  
Calculation Results ◽  
The Cost

The paper analyzes the consequences of the abolition of the export duty on oil and oil products as a necessary step to stimulate energy efficiency of Russia’s economy and eliminate underdevelopment provoked by a long-term subsidizing of inefficient oil refining sector in Russia. The calculation results have shown that even taking into account several deviations from the planned scenarios of changing the parameters of tax regulation of the oil industry in 2014— 2019, the tax maneuver brought over 3.5 trillion rubles (in 2019 — 148 billion rubles) to the state budget in 2014—2017, mainly due to an increase in the base mineral extraction tax rate, and contributed to an increase in the depth of oil refining from 72% to 85%. In addition, the article analyzes possible risks associated with the current plan for reforming the taxation of the industry until 2024 and proposes an alternative that could level some of them. A comparative analysis of the effects of the tax maneuver under the current reform plan and the alternative variant suggests that the latter will allow to achieve a greater total budgetary effect in four years, reduce the cost of subsidizing domestic oil refining, increase the efficiency of Russian vertically integrated oil companies, and reduce the growth rate of oil products prices in the retail market.

Pengaruh konsep diri, self efficacy dan motivasi terhadap Learning outcome mata pelajaran Aqidah Akhlak di kelas XI MA Pacet Mojokerto

2017 ◽  
Vol 1 (1) ◽  
pp. 37
Author(s):  
Happy Ikmal
Keyword(s):  
Learning Outcomes ◽  
Significant Relationship ◽  
Self Efficacy ◽  
Teaching And Learning ◽  
Regression Coefficient ◽  
T Test ◽  
Self Concept ◽  
Working Hypothesis ◽  
Calculation Results ◽  
The Right

Teaching and learning activities is a conscious activity and aims. Therefore, for these activities can be run well and achieve the expected goals, it must be done with the strategy or the right learning approach .. The purpose of this study were: 1) to describe the influence of Self-Concept on the results of studying chemistry at Class XI MA Pacet Mojokerto. 2) Describe the effect of self-efficacy on Learning outcomes chemistry in Class XI MA Pacet Mojokerto 3) Describe the effect of motivation on Learning outcomes chemistry in Class XI MA Pacet Mojokerto 4) Describe the relationship Self-concept, self-efficacy and motivation to Results studied chemistry at Class XI MA Pacet Mojokerto. From the results of the analysis can be summarized as follows: 1) There is a significant relationship between self-concept of the Learning outcomes chemistry inquiry model. T test against self-concept variables (X1) obtained regression coefficient (B) 0.440 (44.0%), coefficient (Beta) 0.091, tcount of 0.378 with significance 0.006 t. Because of the significance of t less than 5% (0.007 <0.05), the Nil Hypothesis (H0) is rejected and working hypothesis (Hi) is received. 2) There is a significant relationship between self-efficacy toward chemistry Learning outcomes inquiry model. T test for Self-efficacy variable (X2) obtained regression coefficient (B) 0.329 (32.9%), coefficient (Beta) 0.124, tcount of 0.436 with a significance of 0.009 t. Because of the significance of t less than 5% (0.008 <0.05), the Nil Hypothesis (H0) is rejected and working hypothesis (Hi) is received. 3) There is a significant relationship between motivation to learn chemistry results inquiry model. T test for motivation variable (X3) obtained regression coefficient (B) 0.130 (13.0%), coefficient (Beta) 0.065, tcount of 0.230 with a significance of 0.001 t. Because of the significance of t less than 5% (0.001 <0.05), the Nil Hypothesis (H0) is rejected and working hypothesis (Hi) received 4) From the calculation results obtained Fhitung value 2,249 (significance F = 0.001). So Fhitung> F table (2,249> 2:03) or Sig F <5% (0.001 <0.05). It means that together independent variables consisting of variable self-concept (X1), Self-efficacy (X2), motivation (X3) simultaneously to variable results of studying chemistry (Y).

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