Wyniki wyszukiwania - BazTech

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Analiza zarządzania systemem komunikacji w mieście z wykorzystanie nowoczesnych narzędzi IT

Dudek T.

Autobusy : technika, eksploatacja, systemy transportowe

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2016

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R. 17, nr 11

45--48

PL

Transport jest głównym problemem dla wielu regionów miejskich. Ciągły wzrost pojazdów, zwiększający się ruch i zatory wymuszają od władz miast wydajniejszych i mniej kosztownych rozwiązań. Proponowany artykuł odnosi się do tych problemów i przedstawia innowacyjne koncepcje i nowe technologie analityczne stosowane w systemach zarządzania ruchem.

EN

Transportation ismain problem for many urban regions. Continuous growth, increasing traffic and congestions force them to manage transportation by more efficient and more cost effective means. This article refers to those problems and examines innovative concepts and new technologies being employed in traffic analysis and management systems.

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Power Plant Performance Monitoring Using Statistical Methodology Approach

Świrski K.

Journal of Power Technologies

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2011

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Vol. 91, nr 2

63-76

EN

The paper sets out problems experienced in current power plant performance calculation methodology. With changes in the electricity market and the increased role of computer control and diagnostic system, the previous methodology is fast becoming obsolete. Several key factors are highlighted (for example, reference values and corrective curves) which may lead to highly imprecise and inadequate evaluations of plant performance and, especially, operator behavior. It is important to bear in mind the systemic changes on the energy market. The current methodology focuses on controlling factors impacting power generating efficiency whereas the modern market is more complex and real costs are largely dependent on other variable costs, such as environmental fees, equipment wearing costs and the energy trading market. Statistical analysis of data is proposed as a modification of the current methodology. As most heat rate calculation is done on-line, it is possible to analyze this data in detail and apply, for example, PCA (Principle Component Analysis) and linear (and nonlinear) regression, thereby enabling a more accurate determination of the influence of principle process parameters on heat rate deviation. The article presents sample results of comprehensive analysis (two cases from different plants) of two twin units (heat rate calculation and process data analysis from a 12-month period) which to demonstrate the clear need to modify and update the old performance calculation approach.

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Computer system for fouling assessment in coal-fired utility boilers

Taler J., Trojan M., Taler D.

Archives of Thermodynamics

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2009

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Vol. 30, no. 2

59-76

EN

The computer based boiler performance system, presented in the paper, has been developed to provide a direct and quantitative assessment of furnace and convective surface cleanliness. Measurements of temperatures, pressures, flows, and gas analysis data are used to perform heat transfer analysis in the boiler furnace and evaporator. Power boiler efficiency is calculated by an indirect method. The on-line calculation of a combustion chamber allows for an on-line heat flow rate determination, which is transferred to the boiler evaporator. Based on the energy balance for the boiler evaporator, superheated steam mass flow rate is calculated taking into the account water flow rate in attemperators. Comparing the calculated and measured superheated steam mass flow rate, the average slagging factor for a combustion chamber wall is determined in the on-line mode. Sootblower sequencing can be optimized based on actual cleaning requirements rather than on fixed time cycles contributing to lowering of the medium usage in sootblowers and increasing of the water-wall lifetime.