scholarly journals Design and Operational Analysis on Natural Gas-fired Cupola

2020 ◽  
Vol 165 ◽  
pp. 01009
Author(s):  
Guangpeng Li
Keyword(s):  
Natural Gas ◽  
Melting Process ◽  
Basic Structure ◽  
Green Economy ◽  
Excellent Performance ◽  
Air Preheater ◽  
Operational Analysis ◽  
Key Technologies ◽  
Social Obligation ◽  
Basic Parameters

Due to environmental regulations and social obligation towards society, more and more attention has been paid to the natural gas-fired for its excellent performance of environmental protection, energy saving and green economy. The present paper is devoted to the design and operational analysis aspects of natural gas-fired cupola. The basic structure of natural gas-fired cupola, including combustion section, melting section, preheating section and cupola well, etc has been discussed. The key technologies of burners, water-cooled grates, lining refractory, refractory balls, air preheater and cupola well are analyzed, and the basic parameters are determined. The melting process is briefly introduced, and the thermal balance of the whole furnace is analyzed. Application of the test in the case shows that natural gas-fired cupola has obvious advantages and high practical value.

scholarly journals THE CURRENT SITUATION AND WORLD TRENDS OF GREEN ENERGY DEVELOPMEN

2020 ◽  
Vol 1(13) ◽  
pp. 55-60
Author(s):  
Kateryna Redko ◽  
◽  
Oleksandra Furs ◽  
Keyword(s):  
Renewable Energy ◽  
Natural Gas ◽  
Electricity Market ◽  
Alternative Energy ◽  
Green Energy ◽  
Green Economy ◽  
Practical Significance ◽  
Regulatory Function ◽  
Capital Costs ◽  
Alternative Sources

As demand for electricity grows significantly, the main drivers of new capacity are the disposal of older, less efficient fossil fuel units; the near-term prospect of having tax credits for renewable energy; and long-term reductions in capital costs for renewable energy, especially solar photovoltaic. Low natural gas prices and favorable renewable energy costs make natural gas and renewable energy the main sources of new generation capacity by 2050. The main purpose of the scientific article is to cover the main problems of the electricity market of Ukraine, to analyze the process of promotion of green energy, to highlight the cases when the transition to alternative sources is a profitable process, in the context of uncertainty and rising prices for traditional energy sources. The article uses a number of general scientific and specific research methods, including methods of analysis and synthesis, scientific deduction and induction. The practical significance of the research is to develop recommendations for improving the state's regulatory function in the field of alternative energy. The large-scale introduction of non-traditional renewable energy in Ukraine will make a significant step in reducing the country's energy dependency, protecting the environment and creating the conditions for a country to join the European community. The scientific novelty is to study the stimulation of energy production using alternative sources, to study the creation of favorable economic conditions for the construction of alternative energy facilities, the development of a "green" economy and to ensure sustainable development of Ukraine. Conclusions and prospects for further research. In Ukraine, the alternative energy sector is developing slowly, but some structural shifts are noticeable, though far from planned. Many small and medium-sized enterprises have already installed solar panels in order to reduce the cost of production and generate additional profits. Further research requires the search for tools and mechanisms in the RES incentive system, with an assessment of the economic impact of their use, using modeling and forecasting methods and models. Keywords: electricity market, energy efficiency, energy intensity of the economy, renewable energy, green tariff

Double Inlet Cyclone Separators for Natural Gas Dehydration

2010 ◽  
Vol 44-47 ◽  
pp. 1002-1006
Author(s):  
Yan Yang ◽  
Zi Li Li
Keyword(s):  
Natural Gas ◽  
Gas Flow ◽  
Stokes Equations ◽  
Tangential Velocity ◽  
Reynolds Stress Model ◽  
Navier Stokes ◽  
Centrifugal Field ◽  
Navier Stokes Equations ◽  
Natural Gas Dehydration ◽  
Basic Parameters

The fluid flow in the double cyclone separator is numerical simulated, using the Navier-Stokes equations with the Reynolds stress model (RSM). The basic parameters of gas flow are obtained as functions of radius such as the tangential velocity, the axial velocity and the static pressure. The numerical results show that in the cyclones water liquids are centrifuged onto the walls and removed from the natural gas due to the strong centrifugal field, while the natural gas stays in the central region and moves out from the up-outlet. The water can be well removed from the natural gas.

Performance Analysis on Variable Injectors to Improve the Internal Velocities and Flow Rates in a Fuel System for Natural Gas Vehicles

2017 ◽  
Vol 379 ◽  
pp. 31-38 ◽  
Author(s):  
Kwon Se Kim ◽  
Doo Seuk Choi
Keyword(s):  
Natural Gas ◽  
Flow Rate ◽  
Total Pressure ◽  
Maximum Pressure ◽  
Excellent Performance ◽  
Flow Rates ◽  
Large Size ◽  
Velocity Flow ◽  
Natural Gas Vehicles

The present study has been attempted to systematically perform a visualizing analysis plan which can improve the flow rate, velocity and mass flow rate as a function of the size of the welding section in the injector as a key for the determination of the injection amount and time of the fuel (CH4) system for natural gas. As the setting conditions for the analysis, a minimum pressure of 2 bar and a maximum pressure of 8 bar were set to be the total pressure values in the case of the inlet, while 0 bar was set for opening drain to represent the state in the atmosphere in the case of the outlet. As a result, the characteristics with an increase in velocity could be affirmed as strong flow separation and eddy current were produced according to the model with a large size of welding section. An excellent performance with an improvement in the performance of velocity flow rate by about 40% could be affirmed in the model where the size of the welding section was designed to be 6 EA.

Operational analysis of the energy efficiency of a natural gas thermoelectric plant

2020 ◽  
Vol 20 (2020) ◽  
pp. 536-537
Author(s):  
Lucas Neves De Almeida ◽  
Hugo Monstans Thurler Dos Santos ◽  
Luiz Antônio de Oliveira Chaves
Keyword(s):  
Energy Efficiency ◽  
Natural Gas ◽  
Operational Analysis ◽  
Thermoelectric Plant

Overview on Micro-Grid Technology

2012 ◽  
Vol 614-615 ◽  
pp. 1720-1723 ◽  
Author(s):  
Xue Song Zhou ◽  
Bin Shang ◽  
You Jie Ma
Keyword(s):  
Smart Grid ◽  
Basic Structure ◽  
Future Research ◽  
Grid Technology ◽  
Key Technologies ◽  
Micro Grid ◽  
Definition Of

In this paper the connotation and the different definition of micro-grid were expounded, the basic structure of micro-grid was described, and the key technologies of smart grid were expatiated on. Finally, the directions for future research in our country of micro-grid are elucidated.

Key Technologies of Rebuilding Underground Natural Gas Storages from Carbonate Buried Hill Gas Reservoirs

2011 ◽  
Vol 347-353 ◽  
pp. 1561-1567 ◽  
Author(s):  
Shu Jun Huang ◽  
Hui Zhang ◽  
Cui Juan Shang ◽  
Shu Long Jing
Keyword(s):  
Natural Gas ◽  
Large Scale ◽  
Gas Storage ◽  
Gas Reservoirs ◽  
Research Results ◽  
Key Technologies ◽  
The Difference ◽  
Buried Hill ◽  
The Impact ◽  
Gas Supply

In this paper, according to research difficulties of rebuilding underground natural gas storages from carbonate buried hill gas reservoirs, we select a variety of relevant technologies and methods to study. Considering the reservoir geologic features geology, the impact of water intrusion, the difference of reserve calculations and many other factors, we carry out the research and determine the key parameters of rebuilding underground natural gas storages, and finally get a reasonable understanding of the study. Upon completion of large-scale gas storage for research results, further to form the distinctive key technologies of rebuilding underground natural gas storages from carbonate buried hill gas reservoirs. The research results will provide the appropriate technical reference for similar future rebuilding underground gas storages and also provide the technical assurance for a safe and stable gas supply to Beijing, Tianjin and Hebei region.

scholarly journals Influence of Burner Nozzle Parameters Analysis on the Aluminium Melting Process

2019 ◽  
Vol 9 (8) ◽  
pp. 1614 ◽  
Author(s):  
Róbert Dzurňák ◽  
Augustín Varga ◽  
Ján Kizek ◽  
Gustáv Jablonský ◽  
Ladislav Lukáč
Keyword(s):  
Natural Gas ◽  
Specific Energy Consumption ◽  
Melting Process ◽  
Input Power ◽  
Melting Time ◽  
Measurement Results ◽  
Air Nozzle ◽  
Burner Nozzle ◽  
The Impact ◽  
Oxygen Concentrations

The paper presents the results of the optimisation of burner nozzle diameters during the combustion of natural gas under the conditions of increasing oxygen concentrations in the oxidizer in aluminium melting processes in drum rotary furnaces. The optimisation of outlet nozzle diameters was performed employing the method of experimental measurements, the results of which can be used for aluminium melting in hearth furnaces. The measurements were carried out using an experimental upstream burner with 13.5 kW input power. The monitored oxygen concentrations in the oxidizer ranged from 21% to 50%. The measurements were performed and evaluated in two variations of the burner configuration (geometry). In the first study, the impact of the enriched oxidizer on the melting of aluminium ingots was evaluated with the defined diameter of the air nozzle, which resulted in a reduction of the aluminium charge melting time by 50% at 45.16% oxygen concentration in the oxidizer, thus achieving savings in the consumption of fuel used for melting. In the second study, the diameter was optimised depending on the combustion rate of the natural gas and oxidizer mixture. The optimisation of the nozzle parameters resulted in the reduction of the charge melting time by 23.66%, while the same 25% enriched oxidizer was used. With the rise of the enrichment level to 35%, further reduction by approximately 12% was observed. The measurement results prove considerable influence of the parameter (geometry) optimisation of the outlet nozzles and oxidizer enrichment. Appropriately selected parameters of the burner can contribute to achieving comparable results at a lower enrichment of the oxidizer. The obtained results demonstrate the intensification of the heat transfer in the current thermal aggregates. The research conclusions confirm that oxygen-enhanced combustion and modification of existing burners reduces the specific energy consumption on the process and reduces CO2 emissions.

Key Technologies Analysis on Management System Data Warehouse

2014 ◽  
Vol 644-650 ◽  
pp. 2925-2928
Author(s):  
Xiu Fang Yang
Keyword(s):  
Data Warehouse ◽  
Management System ◽  
Data Extraction ◽  
Basic Structure ◽  
Data Display ◽  
Teaching Management ◽  
Key Technologies ◽  
System Data ◽  
Analyze Data

In order to further analyze data warehouse’s application value in teaching management system, this paper first analyzes the disadvantages of previous teaching management system data extraction, illustrates the basic structure of data warehouse system, then discusses the establishment of three kinds of models of data warehouse, finally from the demand perspective of teaching management system, analyzes key technologies such as the design of data warehouse model of teaching management system, the upload of teaching data, data display and data warehouse interfaces.

scholarly journals CORRECTION OF INJECTORS REDUCED CHARACTERISTICS BASED ON THE MACHINES PARAMETRIC DIAGNOSTICS RESULTS

2015 ◽  
pp. 78-83
Author(s):  
S. I. Perevoschikov
Keyword(s):  
Natural Gas ◽  
Technical State ◽  
Actual State ◽  
Technological Capabilities ◽  
Cost Performance ◽  
Basic Parameters ◽  
The Cost

A procedure is offered for recalculation of values of the centrifugal natural gas injectors’ basic parameters characterizing the technological capabilities of these machines and their performance efficiency. The recalculation is based on the data on the machines current technical state. This procedure use allows for operating the injectors more rationally with the account of their actual state and thus improving the cost/performance ratios of gas-transporting systems.

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