scholarly journals Development of methodology for the industrial noise control in the case of the dedusting system of a foundry

2020 ◽  
Vol 26 (3) ◽  
pp. 65-73
Author(s):  
Branko Radičević ◽  
Mišo Bjelić ◽  
Mile Savković ◽  
Nebojša Zdravković ◽  
Aleksandra Petrović
Keyword(s):  
Economic Analysis ◽  
Noise Control ◽  
Source Model ◽  
Propagation Model ◽  
Noise Prediction ◽  
Sound Waves ◽  
Industrial Noise ◽  
Residential Unit ◽  
Noise Map ◽  
Selection Of

The article presents the methodology for industrial noise control in the case of the dedusting system of a foundry. The developed methodology starts from the fact that noise protection is possible at the source of noise itself, on the paths of sound waves, and at the place of reception. The model for noise prediction is the basis of the methodology for solving specific examples, which consists of two parts, the source model and the noise propagation model. The result of the model is a noise field, based on noise map creation time. The activities in the procedure of noise protection are defined on a concrete example, and their interdependence is determined. Designing a noise protection system involves taking into account several functional, technological, and other limitations. Based on the required noise reduction of 15 dB in the nearest residential unit, variant noise protection solutions have been formed. The selection of the final noise protection solution was based on the techno-economic analysis.

A New Type of Muffler Based on Microperforated Tubes

2011 ◽  
Vol 133 (3) ◽  
Author(s):  
S. Allam ◽  
M. Åbom
Keyword(s):  
Acoustic Impedance ◽  
Noise Control ◽  
Wave Impedance ◽  
Sound Waves ◽  
Submillimeter Range ◽  
Perforated Plates ◽  
Characteristic Wave ◽  
Standard Temperature ◽  
New Type ◽  
Temperature And Pressure

Microperforated plate (MPP) absorbers are perforated plates with holes typically in the submillimeter range and perforation ratios around 1%. The values are typical for applications in air at standard temperature and pressure (STP). The underlying acoustic principle is simple: It is to create a surface with a built in damping, which effectively absorbs sound waves. To achieve this, the specific acoustic impedance of a MPP absorber is normally tuned to be of the order of the characteristic wave impedance in the medium (∼400 Pa s/m in air at STP). The traditional application for MPP absorbers has been building acoustics often combined with a so called panel absorber to create an absorption peak at a selected frequency. However, MPP absorbers made of metal could also be used for noise control close to or at the source for noise control in ducts. In this paper, the possibility to build dissipative silencers, e.g., for use in automotive exhaust or ventilation systems, is investigated.

scholarly journals Agua, economía y territorio: nuevos enfoques de la Directiva Marco del Agua para la gestión del recurso

2020 ◽  
Vol 29 (1) ◽  
pp. 65
Author(s):  
José A. Gómez-Limón ◽  
Julia Martin-Ortega
Keyword(s):  
Economic Analysis ◽  
Economic Activities ◽  
Public Authorities ◽  
Management Plans ◽  
Water Management Plans ◽  
Development Processes ◽  
Economic Good ◽  
Effective Use ◽  
Water Uses ◽  
Selection Of

Water is a natural resource that performs different functions in development processes (satisfaction of population’s basic needs, key element for ecosystems and landscapes, input in different economic activities, etc.). Taking into account this relevance and its features as an economic good, public authorities have carried out an important role as regulators. The last milestone in this path has been the approval of the Water Framework Directive. One of the most innovative points of this European rule is the use of economic analysis for the optimisation of different water uses. However, the development of the works done for the design of the new water management plans has shown several shortcomings regarding the economic analysis of water uses, the analysis of costs recovery for water services and the selection of meassures to reach these objectives. In this sense it is necessary to strength the nexus between the policy- making and academic spheres in order to support a more rigorous and effective use of the large scientific knowledge developed in this field.

scholarly journals Thermo-economic comparative analysis of gas turbine GT10 integrated with air and steam bottoming cycle

2014 ◽  
Vol 35 (4) ◽  
pp. 83-95 ◽  
Author(s):  
Daniel Czaja ◽  
Tadeusz Chmielnak ◽  
Sebastian Lepszy
Keyword(s):  
Economic Analysis ◽  
Gas Turbine ◽  
Power Plants ◽  
Combined Cycle ◽  
Small Range ◽  
Exhaust Gas ◽  
Thermodynamic Optimization ◽  
Technological Structure ◽  
The Cost ◽  
Selection Of

Abstract A thermodynamic and economic analysis of a GT10 gas turbine integrated with the air bottoming cycle is presented. The results are compared to commercially available combined cycle power plants based on the same gas turbine. The systems under analysis have a better chance of competing with steam bottoming cycle configurations in a small range of the power output capacity. The aim of the calculations is to determine the final cost of electricity generated by the gas turbine air bottoming cycle based on a 25 MW GT10 gas turbine with the exhaust gas mass flow rate of about 80 kg/s. The article shows the results of thermodynamic optimization of the selection of the technological structure of gas turbine air bottoming cycle and of a comparative economic analysis. Quantities are determined that have a decisive impact on the considered units profitability and competitiveness compared to the popular technology based on the steam bottoming cycle. The ultimate quantity that can be compared in the calculations is the cost of 1 MWh of electricity. It should be noted that the systems analyzed herein are power plants where electricity is the only generated product. The performed calculations do not take account of any other (potential) revenues from the sale of energy origin certificates. Keywords: Gas turbine air bottoming cycle, Air bottoming cycle, Gas turbine, GT10

scholarly journals Climate change impact – residential unit

2019 ◽  
Vol 279 ◽  
pp. 03007
Author(s):  
Ján Hollý ◽  
Adela Palková
Keyword(s):  
Climate Change ◽  
Global Warming ◽  
Weather Data ◽  
Emission Scenarios ◽  
Climate Data ◽  
Climate Conditions ◽  
Residential Unit ◽  
Data Application ◽  
Change Impact ◽  
Selection Of

The issue of climate change is undeniably demonstrating its presence. Consequently, there is a rising need to be prepared for upcoming threats by any means possible. One of the precautions includes obtaining the information characterizing the expected impact of global warming. This will allow authorities and other stakeholders to act accordingly in time. The article presents the assessment of the extent of impact of energy-related construction solutions in dwelling type unit situated in Central Europe region under the 21st century climate conditions. The findings represent eventual demands of energy for cooling and heating and its prospective savings. This is conducted by consecutively and automatically changing the parameters in individual simulation runs. As a basis for simulations, regionally scaled weather data of three different climate areas are used. These data are based on the emission scenarios by IPCC and are reaching to the year 2100. The selection of assessed parameters and climate data application are briefly explained in the article. The results of simulations are evaluated and recommended solutions are stated in regard to the specific energy-related construction changes. The aim is to successfully mitigate and adapt to the climate change phenomenon.

Industrial Noise Control Is Practical

AIHAJ ◽  
1968 ◽  
Vol 29 (5) ◽  
pp. 499-503
Author(s):  
P. H. Hutton
Keyword(s):  
Noise Control ◽  
Industrial Noise
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