The Thermodynamic Characteristic of Diesel with 21-30% Oxygen-Enhanced Combustion

2012 ◽  
Vol 509 ◽  
pp. 353-358
Author(s):  
Jin Shu Cheng ◽  
Zhen Lu Deng ◽  
Jing Wang
Keyword(s):  
Fuel Consumption ◽  
Oxygen Concentration ◽  
Flue Gas ◽  
Thermal Efficiency ◽  
Thermodynamic Characteristic ◽  
Volume Concentration ◽  
Flame Temperature ◽  
Test Bed ◽  
Gas Volume ◽  
Theoretical Flame Temperature

The study was carried out on the burning test-bed which was controlled by Programmable Logic Controller (PLC) model and diesel was used as the fuel. The thermodynamic characteristic of oxygen-enhanced combustion, including fuel consumption, flue gas volume, flue gas components’ volume concentration, theoretical flame temperature, flame emissivity, energy efficiency and thermal efficiency, etc, were analyzed. The results showed that: with oxygen concentration was increased from 21% to 30%, fuel consumption was decreased by 40.6% and flue gas volume was decreased by 57.5%. Additionally, higher oxygen concentration leaded to higher theoretical temperature and stronger flame blackness because of the decreasing of N2 volume in supporting air. What’s more, the decreasing of energy brought away by flue gas and the thermal efficiency were both increased with the increasing of oxygen concentration.

The Investigation on Application of Oxygen-Enriched Combustion in Cement Rotary Kiln

2013 ◽  
Vol 291-294 ◽  
pp. 804-808
Author(s):  
Xiao Rong Shen ◽  
Shan Qing ◽  
Xiao Jun Shi ◽  
Yi Xiao ◽  
Zhi Fang Yang
Keyword(s):  
Fuel Consumption ◽  
Rotary Kiln ◽  
Flue Gas ◽  
Thermal Efficiency ◽  
Flame Temperature ◽  
Exhaust Gas ◽  
Environmental Benefit ◽  
Gas Loss ◽  
The Cost ◽  
Products Of Incomplete Combustion

The investigation on application of oxygen-enriched combustion in cement rotary kiln shows that flame temperature in rotary kiln can be increased, which improves the utilization of coal and thermal efficiency of rotary kiln. And the fuel consumption and the cost of production can be reduced. In this situation, the objective of increasing production, improving quality and saving energy can be achieved. In the meanwhile, the requirement of air can be reduced in oxygen-enriched combustion. Thus the generation of flue gas and the products of incomplete combustion, which usually are CO, can be reduced. And then the exhaust gas loss and the generation and emission of CO2 and NOx can be accordingly reduced, which enhances to achieve the objective of reduction of pollutants and promote the environmental benefit greatly.

Study of Combustion Characteristics of Ethanol at Different Dilution With the Carrier Gas

2014 ◽  
Author(s):  
Binash Imteyaz ◽  
Mohamed A. Habib
Keyword(s):  
Carbon Dioxide ◽  
Flue Gas ◽  
Carbon Capture ◽  
Liquid Fuel ◽  
Flame Temperature ◽  
Combustion Process ◽  
Combustion Efficiency ◽  
Combustion Characteristics ◽  
Conventional Combustion ◽  
Gas Volume

With the ever rising concern of global warming, carbon capture is gaining the reputation of one of the most challenging fields of research. A very promising technology to capture CO2 is oxy-combustion. Oxy-combustion offers several advantages over conventional combustion technologies, such as flue gas volume reduction, high combustion efficiency, low fuel consumption and significant reduction in NOx emissions. Liquid fuel is available and it is the most widely used source of energy in the world. Easy handling and transportation, less storage volume and higher flame temperature are some of the features of liquid fuel which give it an upper hand over other sources. In this study, an experimental work on oxygen enriched combustion of ethanol in a vertical reactor by Lacas F. et. al. has been modeled numerically. Non-premixed model using Probability Density Function has been incorporated to simulate the combustion process of ethanol droplets. Predicted combustion characteristics are found to be in good compliance with the experimental data. In addition to this, effects of dilution of carbon-dioxide in oxygen on the flame properties have also been presented. Combustion of ethanol in oxygen-carbon dioxide environment has been compared with that of the conventional air environment.

Study of Combustion Characteristics of Ethanol at Different Dilution With the Carrier Gas

2015 ◽  
Vol 137 (3) ◽  
Author(s):  
Binash Imteyaz ◽  
Mohamed A. Habib
Keyword(s):  
Carbon Dioxide ◽  
Flue Gas ◽  
Carbon Capture ◽  
Liquid Fuel ◽  
Flame Temperature ◽  
Combustion Process ◽  
Combustion Efficiency ◽  
Combustion Characteristics ◽  
Gas Volume ◽  
Probability Density Function Pdf

With the ever-rising concern of global warming, carbon capture is gaining the reputation of one of the most challenging fields of research. A very promising technology to capture CO2 is oxy-combustion. Oxy-combustion offers several advantages over conventional combustion technologies, such as flue–gas volume reduction, high combustion efficiency, low fuel consumption, and significant reduction in NOx emissions. Liquid fuel is available and it is the most widely used source of energy in the world. Easy handling and transporting, less storage volume and higher flame temperature are some of the features of liquid fuel which give it an upper hand over other sources. In this study, an experimental work on oxygen enriched combustion of ethanol in a vertical reactor by Lacas et al. (2005, “Experimental Study of Air Dilution in Oxy-Liquid Fuel Flames,” Proc. Combust. Inst., 30(2), pp. 2037–2045) has been modeled numerically. Nonpremixed model using probability density function (PDF) has been incorporated to simulate the combustion process of ethanol droplets. Predicted combustion characteristics are found to be in good compliance with the experimental data. In addition to this, effects of dilution of carbon dioxide in oxygen on the flame properties have also been presented. Combustion of ethanol in oxygen–carbon dioxide environment has been compared with that of the conventional air environment.

Superadiabatic Radiant Porous Burner With Preheater and Radiation Corridors

2013 ◽  
Author(s):  
Vahid Vandadi ◽  
Chanwoo Park ◽  
Massoud Kaviany
Keyword(s):  
Flue Gas ◽  
Thermal Efficiency ◽  
Flame Temperature ◽  
Reaction Model ◽  
Zero Order ◽  
Combustion Heat ◽  
Porous Burner ◽  
Higher Temperature ◽  
Burner Design ◽  
Lean Conditions

The thermal efficiency of radiant porous burners is less than 25% because most of the combustion heat is lost by flue gas. Here, we present a new radiant burner design to recuperate the heat of the exit flue gas using a preheater to increase the inlet air temperature and raise the flame temperature locally above adiabatic temperature (superadiabatic) at fuel-lean conditions. The superadiabatic heat is then conducted through embedded radiation corridors and is radiated, at a higher temperature than the flue gas, to target. This paper presents the results of the superadiabatic radiant porous burner from a numerical analysis using a zero-order combustion reaction model for methane/air mixture and non-thermal equilibrium formulation. The thermal efficiency over 40% is predicted.

scholarly journals Field testing and evaluation of a domestic biomass cookstove in rural small household industry

2018 ◽  
Vol 67 ◽  
pp. 02034
Author(s):  
Suhartono ◽  
Suharto ◽  
Nurlaila Agustina ◽  
Hanna Hafidaturrohmah
Keyword(s):  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Thermal Power ◽  
Flame Temperature ◽  
Combustion Efficiency ◽  
Specific Fuel Consumption ◽  
Biomass Fuel ◽  
Particulate Emissions ◽  
Performance Parameters ◽  
Biomass Stove

This work presents the performance parameters of a solid biomass cookstove for household industrial application to meet the parameters required by the National Standardization Agency of Indonesia (SNI 7926: 2013). The biomass stove design was tested using corncob, coconut shell and wood chips as biomass fuel. Thermal efficiency, combustion efficiency, specific fuel consumption, emission of CO and particulate emissions were evaluated. The combustion temperature, visual flame, combustion air requirement as well as economic evaluation were also studied as additional performance parameters. The average specific fuel consumption rate, Sc of the stove was found 0.57 kg/h. The using amount of biomass variety on this stove could produce the maximum thermal power, Pth of 24,75 kWth and the average combustion efficiency, ηc and the thermal efficiency, ηth of 98.2% and 27%, respectively. The flame temperature of 722-947°C was achieved at equivalence ratio, ф=0.61-0.89. The average CO and particulate production, PM2.5 on this biomass stove were 39.97g/kg and 0.9 g/kg, respectively. The difference of profit margin compared to liquid petroleum gas (LPG) utilization as fuel was about IDR 2,000/kg fish. All these parameters are met to SNI 7926:2013 and corncobs seem the most appropriate biomass fuel on the consideration of this test results.

High-efficient combustion of gas-fired furnace with 21∼36% oxygen-enriched air

2018 ◽  
Vol 115 (6) ◽  
pp. 613
Author(s):  
Liying Qi ◽  
JunXiang Guo ◽  
Qing Wang ◽  
Wenbin Dai ◽  
Hao Bai ◽  
...  
Keyword(s):  
Heating Rate ◽  
Oxygen Concentration ◽  
Flue Gas ◽  
Heating Temperature ◽  
Convective Heat Transfer Coefficient ◽  
Flame Temperature ◽  
Excess Oxygen ◽  
Temperature Distributions ◽  
High Efficient ◽  
Heating Test

This experimental investigation was aimed at studying the influences of 21∼36% oxygen concentrations on the heating rate, emissions and temperature distributions. In consideration of the actual needs, 1300 °C was selected for the heating temperature of flue gas. When the billet was taken out from furnace, the billet core temperature were about 1200 °C, and the temperature difference between the billet surface and core fluctuated between 10 to 50 °C. At the same time, in order to ensure the quality of billet and save energy and cost, the heating temperature and oxygen concentration in furnace should not be too high. Increasing the oxygen concentration led to higher heating rate due to lower level of the inert gas (N2) in the combustion air. When the oxygen concentration was increased from 21% to 36%, the heating rate of flue gas was increased by 68.3% in the heating test, and the heating rate of billet core was increased by 39.5%. Higher oxygen concentration yielded higher flame temperature. Hence, the NOx concentration increased with increasing oxygen concentration. Moreover, the generation of NOx concentration was faster and more under the excess oxygen at higher oxygen concentration levels. The NOx concentration is very low and the highest NOx concentration is only 27.2 ppm even at the highest oxygen concentration under flue gas cycle combustion conditions. Under the graded oxygen combustion and concentrated oxygen combustion conditions, the higher the oxygen concentration, the greater the difference in NOx emission concentration. The concentration of NOx in the graded oxygen supply is relatively low. Additionally, Numerical Simulations indicated that the temperature distributions became progressively nonuniform with increasing oxygen concentration because the absorption coefficient and convective heat transfer coefficient were altered.

Exergy analysis of a turboprop engine at different flight altitude and speeds using novel consideration

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Ali Dinc ◽  
Yousef Gharbia
Keyword(s):  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Exergy Efficiency ◽  
Specific Fuel Consumption ◽  
Flight Altitude ◽  
Fuel Flow ◽  
Turboprop Engine ◽  
Shaft Power ◽  
Two Parameters ◽  
The Relationship

Abstract In this study, exergy efficiency calculations of a turboprop engine were performed together with main performance parameters such as shaft power, specific fuel consumption, fuel flow, thermal efficiency etc., for a range of flight altitude (0–14 km) and flight speeds (0–0.6 Mach). A novel exergy efficiency formula was derived in terms of specific fuel consumption and it is shown that these two parameters are inversely proportional to each other. Moreover, a novel exergy efficiency and thermal efficiency relation was also derived. The relationship showed that these two parameters are linearly proportional to each other. Exergy efficiency of the turboprop engine was found to be in the range of 23–33%. Thermal efficiency of the turboprop engine was found to be around 25–35%. Exergy efficiency is higher at higher speeds and altitude where the specific fuel consumption is lower. Conversely, exergy efficiency of the engine is lower for lower speeds and altitude where the specific fuel consumption is higher.

scholarly journals Effect of algae fuel addition on fuel consumption and thermal efficiency of single cylinder diesel engine

2021 ◽  
Vol 1068 (1) ◽  
pp. 012016
Author(s):  
Hazim Sharudin ◽  
N.A. Rahim ◽  
N.I. Ismail ◽  
Sharzali Che Mat ◽  
Nik Rosli Abdullah ◽  
...  
Keyword(s):  
Diesel Engine ◽  
Fuel Consumption ◽  
Thermal Efficiency ◽  
Single Cylinder

Carbon dioxide capture from a real coal-fired flue gas using K-based solid sorbents in a 0.5 MWe-scale test-bed facility

2020 ◽  
Vol 103 ◽  
pp. 103192
Author(s):  
Young Cheol Park ◽  
Sung-Ho Jo ◽  
Jae-Young Kim ◽  
Yooseob Won ◽  
Hyungseok Nam ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Flue Gas ◽  
Carbon Dioxide Capture ◽  
Test Bed ◽  
Solid Sorbents ◽  
Scale Test

scholarly journals RESEARCH OF INFLUENCE OF AIR TEMPERATURE ON THE LEVEL OF NITROGEN OXIDES IN SMOKE GASES OF BOILER PLANTS

2019 ◽  
Vol 9 (4) ◽  
pp. 27-32
Author(s):  
Olga A. BALANDINA ◽  
Svetlana M. PURING
Keyword(s):  
Mathematical Modeling ◽  
Nitric Oxide ◽  
Nitrogen Oxides ◽  
Flue Gas ◽  
Software Package ◽  
Flame Temperature ◽  
Combustion Process ◽  
Flue Gases ◽  
Oxidizing Agent ◽  
Mixture Formation

The analysis of the values of the concentrations of the formed nitrogen oxides and the temperatures of the jet plume under various conditions of mixture formation is carried out. The plots of the distribution of torch temperatures and concentrations of nitric oxide in the calculated area for oxidizer temperatures of 20, 60, 100, 150, and 200 ° C were obtained and analyzed. Mathematical modeling of the gaseous fuel combustion process was carried out using the FlowVision software package. An analysis of the results showed that a decrease in the temperature of the air supplied as an oxidizing agent leads to a significant decrease in the concentration of nitrogen oxides in flue gases, while not significantly affecting the change in the flame temperature. The research results can be used to solve the problems of optimizing boiler plants, in order to reduce harmful flue gas emissions. Further modeling is planned to determine the dependence of the influence of various factors on the degree of formation of nitrogen oxides in the flue gases of boiler plants.

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