Enhancing Prediction Accuracy in the Evaluation of Power Plant Uprates Utilizing a Novel ‘Big Data’ Approach

2018 ◽  
Author(s):  
Peter Pechtl ◽  
Christian Scheinecker ◽  
Josef Petek
Keyword(s):  
Big Data ◽  
Power Plant ◽  
Economic Assessment ◽  
Fast Evaluation ◽  
Detailed Model ◽  
Current Configuration ◽  
Fuel Savings ◽  
Operating Modes ◽  
Definition Of ◽  
Operational Data

The evaluation of power plant uprates has traditionally been based on the definition of several ‘typical’ operating modes based on historical data and a — more or less detailed — model of the plant that is compared in current configuration against the same base model including the modifications under consideration. For the economic assessment of the uprate, annual operating hours are allocated to the operating points, and fuel savings and/or additional output predicted by the model due to the modifications are evaluated against the expected investment cost. In this study, the authors demonstrate that this classic approach contains risks in several aspects, in particular: • the representativeness of the ‘typical’ operating modes, • the accuracy of the model, and • the correctness of the assumptions in the allocation of operating hours. Utilizing the example of an actual uprate of a heat recovery steam generator (HRSG) in a large utility plant of an Austrian steel company, a new approach for an evaluation based on ‘big data’ is presented that uses a full year of operational data in hourly granularity for both, the verification of the accuracy of the plant model, and the evaluation of the effect of the uprate. The authors also provide details of the underlying technologies that allow for both, excellent match of operational data with a fully-fledged heat balance software and fast evaluation of tens of thousands of calculation cases.

Картофелекопатель с ротационной сепарирующей поверхностью

2018 ◽  
Author(s):  
V.M. Alakin ◽  
G.S. Nikitin
Keyword(s):  
Performance Data ◽  
Pilot Studies ◽  
Research Results ◽  
Operating Modes ◽  
Analysis Of Results ◽  
Design Characteristics ◽  
And Performance ◽  
Definition Of

Приведены результаты исследований экспериментального картофелекопателя с ротационной сепарирующей поверхностью. Особое внимание уделяется обоснованию конструктивных параметров и определению рабочих характеристик нового сепарирующего устройства. На основе анализа результатов экспериментальных исследований определены наиболее оптимальные режимы работы экспериментального картофелекопателя.Research results of an experimental potato digger with rotational separating web are published in this article. Special attention is paid to definition of design characteristics and performance data of the new separating device. Admissible operating modes are defined on the basis of the analysis of results of pilot studies of the experimental potato digger.

AS A DIGITAL TECHNOLOGY SUCH AS BIG DATA CAN BECOME A TOOL AGAINST SOCIETY

2020 ◽  
Author(s):  
Vladislav Andreyevich Shcherbakov ◽  
◽  
Svetlana Aleksandrovna Chevereva ◽  
Keyword(s):  
Big Data ◽  
Digital Technology ◽  
State Level ◽  
The State ◽  
People’S Republic Of China ◽  
People's Republic Of China ◽  
Republic Of China ◽  
Total Control ◽  
Definition Of ◽  
Big Data Technology

The definition of the term Big Date is given. Particular attention is paid to how, in practice, Big Data technology is being introduced into people's lives at the state level and how it can be used for total control using the example of the People’s Republic of China.

ORGANIZATIONAL AND ECONOMIC ASSESSMENT OF THE DEVELOPMENT OF SMALL AND MEDIUM-SIZED BUSINESSES IN THE AGRICULTURAL SECTOR

2021 ◽  
Vol 1 (8) ◽  
pp. 72-78
Author(s):  
T. V. GRISHINA ◽  
◽  
N. V. ZAMYATKINA ◽  
Yu. A. YUKHLINA ◽  
◽  
...  
Keyword(s):  
Agricultural Production ◽  
Agricultural Sector ◽  
Economic Assessment ◽  
Digital Transformation ◽  
Innovative Development ◽  
Classification Feature ◽  
Theoretical Approaches ◽  
New Type ◽  
Definition Of

The article highlights the theoretical approaches to the definition of the concepts of small and medium-sized businesses. The relevance of the research is determined by the need to solve the problem of the development of small and medium-sized businesses in the agricultural sector in the context of digital transformation, the development and justification of directions for improving its development. The scientific novelty of the study is the formation of a complex for assessing the development of small forms of agricultural production, which allows us to develop priority strategic directions of development, including aspects of modernization of agricultural production and innovative development. The indicators of the development of small and medium-sized businesses in the agricultural sector are studied. A new type of classification feature of small and medium-sized businesses in the agricultural sector is proposed.

Study on 3-D Flow Field of Concrete Volute Conduit of Circulating Water Pump in Nuclear Power Plant

2011 ◽  
Vol 99-100 ◽  
pp. 350-353
Author(s):  
Xiao Bing Sun ◽  
Xu Bin Qiao
Keyword(s):  
Power Plant ◽  
Nuclear Power Plant ◽  
Nuclear Power ◽  
Stokes Equations ◽  
Three Dimensional ◽  
Gradual Change ◽  
Water Pump ◽  
Pump System ◽  
Circulating Water ◽  
Operating Modes

As the largest unit capacity of nuclear power plant at present, the flow conduit of circulating water pump in EPR1750 nuclear power plant is a volute conduit, which is a cast-in-situ conceret structure with complexly gradual change cavity. Therefore, the hydraulic efficiency of circulating water pump is not only related with the design of pump leaves, but also closely related to the design of volute and the complicated spatial type of intake and outtake conduits. With the pump leaves and the intake and outtake conduits of conceret volute as the research model, based on computational fluid dynamics (CFD)and the three dimensional Reynolds averaged Navier-Stokes equations, an analytic model suitable for computation is established to simulate the three-dimensional steady flow in the whole pumping system under different operating modes. By use of the commercial fluid-computation softer ANSYS, the distribution of basic physic quantities in the fluid field inside the pump and the conduits is obtained. The analysis and prediction of the performance of pump system are made, and the spatial type design of intake and outtake conduits is evaluated. The calculation results can be referenced to improve the design of pump systems in the similar projects.

scholarly journals Economic assessment of energy efficiency investments in dwellings = Evaluación económica de inversiones de eficiencia energética en viviendas

2017 ◽  
Vol 1 (2) ◽  
pp. 36 ◽  
Author(s):  
Hector Hernández
Keyword(s):  
Energy Efficiency ◽  
Energy Savings ◽  
Economic Assessment ◽  
Energy Performance ◽  
Point Of View ◽  
Economic Modelling ◽  
Evaluación Económica ◽  
Energy Performance Of Buildings ◽  
The Moment ◽  
Definition Of

In order to improve the energy performance of buildings, the need to value economically investments of energy efficiency associated with the rehabilitation of dwellings arises. This point of view provides an useful tool for analysts who start in the economic appraisal of energy efficiency investments. The present research gives a conceptual framework for the economic assessment of these types of investments in dwellings. As a result, it is possible to identify two techniques in the appraisals of this nature: dynamic and static approaches. Both methods contrast the benefits (energy savings) with the costs of investments over time. However, they differentiate the opportunity and the moment when investment must be carried out given an uncertainty scenario. This conceptual precision allows the study of several publications where different alternatives in retrofitting houses where evaluated, confirming the considerations that must be taken into account when economic modelling is made: the type of approach to be used (dynamic or static) and; at the definition of the investment alternatives and scenarios, the aspects of time, irrevocability and uncertainty.ResumenEn pro de la mejora del desempeño energético de los edificios, surge la necesidad de evaluar económicamente las inversiones de eficiencia energética asociadas a la rehabilitación de viviendas. Este punto de vista trata de ser una herramienta útil para analistas que se inicien en la evaluación económica de inversiones en eficiencia energética. La presente investigación muestra un marco conceptual de la evaluación económica de este tipo de inversiones en viviendas. Como resultado, es posible identificar dos enfoques presentes en los análisis económicos de esta naturaleza: el dinámico y el estático. Ambos métodos contrastan los beneficios (ahorros energéticos) con los costes de las inversiones en el tiempo. Sin embargo, diferencian la oportunidad y el momento en que la inversión debe realizarse dado un escenario de incertidumbre. Esta precisión conceptual permite estudiar varias publicaciones donde se evaluaron diferentes alternativas de reacondicionamiento en viviendas, confirmándose las consideraciones que deben tenerse presentes en momento de realizar la modelación económica: el tipo de enfoque a usar (dinámico o estático) y, en la definición de las alternativas de inversión y escenarios, los aspectos de tiempo, irrevocabilidad e incertidumbre.

scholarly journals Determining the proximity of groups in social networks based on text analysis using big data

2019 ◽  
pp. 521-526
Author(s):  
A S Mukhin ◽  
I A Rytsarev ◽  
R A Paringer ◽  
A V Kupriyanov ◽  
D V Kirsh
Keyword(s):  
Social Networks ◽  
Big Data ◽  
Social Network ◽  
Data Collection ◽  
Text Analysis ◽  
Software Tool ◽  
Text Data ◽  
The Social ◽  
Information Research ◽  
Definition Of

The article is devoted to the definition of such groups in social networks. The object of the study was selected data social network Vk. Text data was collected, processed and analyzed. To solve the problem of obtaining the necessary information, research was conducted in the field of optimization of data collection of the social network Vk. A software tool that provides the collection and subsequent processing of the necessary data from the specified resources has been developed. The existing algorithms of text analysis, mainly of large volume, were investigated and applied.

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