scholarly journals COMBUSTION SPEED PARAMETERS WHEN SIMULATING BY ANSYS FLUENT PROGRAM OF SOLID FUEL COMBUSTION

2020 ◽  
pp. 41-45
Author(s):  
M.M. Nekhamin ◽  
D.L. Bondzyk
Keyword(s):  
Burning Rate ◽  
Solid Fuel ◽  
Cfd Modeling ◽  
Solid Fuels ◽  
Ansys Fluent ◽  
Solid Fuel Combustion ◽  
The Difference ◽  
Fuel Particles ◽  
Combustion Of Solid Fuels ◽  
Combustion Speed

The existing difference in the models used to describe the burning rate of solid fuel particles, and, accordingly, the difference in the constants appearing in them, determines the relevance of the formulation of the relation between the constants known from the literature and the parameters that must be set in programs for CFD modeling of heat and power processes. This, in particular, relates to modeling the combustion of solid fuels in the well-known program ANSYS FLUENT. The paper outlines a possible approach to solving this problem. Bibl. 5, Fig. 3.

scholarly journals Solid fuel use in electrified low-income residential areas in South Africa: The case of KwaDela, Mpumalanga

2021 ◽  
Vol 32 (1) ◽  
pp. 58-67
Author(s):  
N.C. Nkosi ◽  
R.P. Burger ◽  
N.R. Matandirotya ◽  
C. Pauw ◽  
S.J. Piketh
Keyword(s):  
Air Quality ◽  
Solid Fuel ◽  
Low Income ◽  
Ambient Air ◽  
Ambient Air Pollution ◽  
Space Heating ◽  
Solid Fuels ◽  
Residential Areas ◽  
Fuel Use ◽  
Solid Fuel Combustion

Domestic solid fuel combustion remains a key contributor to indoor and ambient air pollution in low-income settlements. Understanding solid-fuel cost perceptions and burning patterns variability is required for developing sustainable energy policies and applicable site-specific intervention strategies to effectively improve ambient air quality. The purpose of the study was to understand domestic solid fuel use dynamics and trends in KwaDela, a low-income residential area in Mpumalanga. Data were gathered using surveys, questionnaires, observations, and temperature sensors. Findings were that there are two main local sources of wood and coal within the settlement and each household was estimated to consume 1 800 to 2 992.5 kg of coal annually. The maximum amount of coal used per burning event was 9.3 kg, with an average of 4 kg and a standard deviation of ±2.5 kg. Coal and wood purchase price varied depending on their sources, but were cheaper than electricity. In winter, the burning events are longer (four to six hours) than in summer and more (one to three) per day, and start earlier (from 03:00 and 15:30) mainly due to space-heating needs. Cooking, space-heating and boiling water are the major household needs that drive the use of solid fuels in electrified low-income residential areas. The key to improving air quality in such areas is integrating fuel use intervention methods that the residents can afford and are readily accessible. Highlights Burning events are longer in winter than summer. Solid fuels are affordable, available, and easily accessible. Electricity remains sparsely used for domestic purposes.

scholarly journals Investigation of the direct-flow burners and nozzles arrangement at the direct-flow-vortex coal combustion in a furnace with solid slag removal

2021 ◽  
Vol 2088 (1) ◽  
pp. 012015
Author(s):  
M V Fomenko ◽  
V B Prokhorov ◽  
N E Fomenko
Keyword(s):  
Solid Fuel ◽  
Coal Combustion ◽  
Direct Flow ◽  
Slag Removal ◽  
Ansys Fluent ◽  
Solid Fuel Combustion ◽  
Safety And Reliability ◽  
Solid Slag ◽  
Flow Vortex ◽  
Furnace Aerodynamics

Abstract The paper presents results of the furnace aerodynamics investigation using direct-flow burners and air nozzles (DFBAN) with solid slag removal (SSR). The studies were performed using the computational fluid dynamics software ANSYS Fluent. The paper includes recommendations for the development of effective solid fuel combustion schemes with DFBAN, methods for researching and optimization of the combustion aerodynamics with the use of DFBAN, optimization criteria, initial data for the study. The scheme for burning Kuznetsk lean coal with the use of DFBAN and SSR was developed. Several series of calculations were performed for the developed scheme. In these calculations, the dependencies of the indicators of efficiency, furnace ecological safety and reliability on the nozzles and burners positions, which are located in the first zone of the scheme, were found. The first stage of the optimization of the developed scheme burning solid fuel with the SSR was made.

scholarly journals Effects of domestic solid fuel combustion emissions on the biomarkers of homemakers in rural areas of the Fenwei Plain, China

2021 ◽  
Author(s):  
Rong Feng ◽  
Hongmei Xu ◽  
Kailai He ◽  
Zexuan Wang ◽  
Bei Han ◽  
...  
Keyword(s):  
Solid Fuel ◽  
Rural Areas ◽  
Inflammatory Responses ◽  
Rural China ◽  
Biological Indicators ◽  
Fuel Combustion ◽  
Solid Fuels ◽  
Control Group ◽  
Necrosis Factor Alpha ◽  
Solid Fuel Combustion

Abstract Background The health effects of heavy solid fuel use in winter in rural China are of concern. The effects of air pollution resulting from domestic solid fuel combustion in rural households on rural homemakers’ biomarkers were revealed in this study. Methods In total, 75 female homemakers from rural areas of Guanzhong Basin, the Fenwei Plain, People’s Republic of China, were randomly selected and divided into three groups (biomass users, coal users, and nonusers of solid fuel user [control group]). The differences in biological indicators, including 8-hydrox-2’-deoxyguanosine (8-OHdG), interlukin-6 (IL-6), and tumor necrosis factor-alpha (TNF-α) in urine samples as well as blood pressure (BP, including systolic BP [SBP] and diastolic BP [DBP]) and heart rate (HR) among the groups in winter and summer were investigated using statistical analysis. Results IL-6, 8-OHdG, HR, SBP, and DBP were significantly higher in winter than in summer (P < 0.05) owing to the poor air quality resulted from the excessive use of solid fuels in winter. Significant seasonal differences in 8-OHdG, HR, and SBP were observed for both coal and biomass users. After the influence of confounders was removed, only IL-6 levels in the urine of solid fuel users were significantly higher than that of the control group. Conclusions IL-6 is a sensitive biomarker representing inflammatory responses to particulate matter emitted through household solid fuel combustion. Locally, excessive use of solid fuels in winter posed serious PM2.5 pollution in this area and adverse effects on inflammatory biomarkers in these rural homemakers and induced DNA damage related to oxidative stress.

Emission Production from the Incineration of Municipal Waste and Coal in Heat Sources for Solid Fuel

2016 ◽  
Vol 832 ◽  
pp. 18-22 ◽  
Author(s):  
Martin Vantúch ◽  
Jozef Jandačka ◽  
Alexander Čaja
Keyword(s):  
Brown Coal ◽  
Solid Fuel ◽  
Municipal Waste ◽  
Solid Fuels ◽  
Heat Sources ◽  
Pet Bottles ◽  
Combustion Of Solid Fuels

The article describes impacts of incinerating PET bottles and HDPE, LDPE bags in heat sources intended for combustion of solid fuels on emission load of environment. As primary fuel was intended brown coal and municipal waste was admixed in various amounts. The article describes the process of measuring and evaluating emissions during their incineration.

scholarly journals Effects of aluminum composites on the regression rates of solid fuels

2019 ◽  
Author(s):  
C. Paravan ◽  
S. Penazzo ◽  
S. Dossi ◽  
M. Stocco ◽  
L.T. DeLuca ◽  
...  
Keyword(s):  
Burning Rate ◽  
Ammonium Perchlorate ◽  
Solid Fuel ◽  
Data Reduction ◽  
Mass Flux ◽  
Performance Enhancement ◽  
Solid Fuels ◽  
Mass Burning Rate ◽  
Time Resolved ◽  
Ptfe Composites

Innovative, mechanically activated Al–polytetrafluoroethylene (PTFE) composites and ammonium perchlorate (AP) coated nano-sized aluminum (C-ALEX) were produced, characterized, and tested as solid fuel additives. The ballistics of fuel formulations based on hydroxylterminated polybutadiene (HTPB) was investigated in a microburner by a time-resolved technique for regression rate (rf) data reduction. Both Al-composites show promising results in terms of rf and mass burning rate enhancement. In particular, the C-ALEX showed a percent rf increase over the baseline (HTPB) of 27% at an oxidizer mass flux of 350 kg/(m2s), without requiring dedicated dispersion procedures. This performance enhancement was nearly constant over the whole investigated range.

Solid Fuel Fire Behavior Under Fixed Pressure in a Low-Pressure Chamber

2015 ◽  
Author(s):  
Rui Feng ◽  
Quanyi Liu ◽  
Runhe Tian ◽  
Kewei Chen ◽  
Rui Yang ◽  
...  
Keyword(s):  
Burning Rate ◽  
Solid Fuel ◽  
Fire Behavior ◽  
Low Pressure ◽  
Pressure Chamber ◽  
Fire Tests ◽  
Mass Burning Rate ◽  
Base Dimension ◽  
The Difference ◽  
Fire Characteristics

To comprehensively reveal the difference of solid fuel fire characteristics at different altitudes, fire experiments of cardboard boxes at multiple static pressures with two configurations filled with shredded office paper were conducted in a low-pressure chamber. The measured parameters are mass burning rate, radiative heat flux, oxygen concentration and heat release rate (HRR) etc. The mass burning rate divided by fire base dimension ṁ/D is correlated against the production of pressure-squared times length-cubed (P2L3) to the power of 0.29 based on current cardboard boxes fire test data. HRR of two boxes fire tests are higher than that of one box fire tests under fixed pressures. However, there are a higher peak of HRR under a fixed higher pressure for one-box fire tests while a lower peak of HRR under a higher pressure for two-box fire tests. The HRR would decrease sharply after reaching the peak.

scholarly journals Indoor and outdoor particulate matter concentrations on the Mpumalanga highveld – A case study

2015 ◽  
Vol 25 (2) ◽  
pp. 12 ◽  
Author(s):  
B Wernecke ◽  
B Language ◽  
S.J Piketh ◽  
R.P Burger
Keyword(s):  
Public Health ◽  
Particulate Matter ◽  
Indoor Air ◽  
Solid Fuel ◽  
Low Income ◽  
Sampling Period ◽  
Solid Fuels ◽  
Respirable Fraction ◽  
Combustion Of Solid Fuels

The household combustion of solid fuels, for the purpose of heating and cooking, is an activity practiced by many people in South Africa. Air pollution caused by the combustion of solid fuels in households has a significant influence on public health. People mostaffected are those considered to be the poorest, living in low-income settlements, where burning solid fuel is the primary source of energy. Insufficient data has been collected in South Africa to quantify the concentrations of particulate emissions that peopleare exposed to, especially the respirable fraction, associated with the combustion of solid fuels. The aim of this paper is to gain an understanding of the particulate matter (PM) concentrations a person living in a typical household in a low income settlement in theSouth African Highveld is exposed to. It also seeks to demonstrate that the use of solid fuels in the household can lead to indoor air pollution concentrations reaching levels very similar to ambient PM concentrations, which could be well in excess of the NationalAmbient Air Quality Standards, representing a major national public health threat. A mobile monitoring station was used in KwaDela, Mpumalanga to measure both ambient particulate concentrations and meteorological conditions, while a range of dust/particulate monitors were used for indoor and personal particulate concentration measurements. Indoor and personal measurements are limited to the respirable fraction (PM4) as this fraction contributes significantly to the negative health impacts. The sampling for this case study took place from 7-19 August 2014. Highest particulate matter concentrations were evident during the early mornings and the early evenings, when solid fuel burning activities were at their highest. Indoor and personal daily average PM4 concentrations did not exceed the 24h National Ambient PM2.5 Standard of 65 μg/m3 nor did they exceed the 24h National Ambient PM10 Standard of 75 μg/ m3. The outdoor PM2.5 concentrations were found to be below the standards for the duration of the sampling period. The outdoor PM10 concentrations exceeded the standards for one day during the sampling period. Results indicate that, although people in KwaDelamay be exposed to ambient PM concentrations that can be non-compliant to ambient standards, the exposure to indoor air, where solid fuel is burnt, may be detrimental to their health.

Innovative Method for the Combustion of Glycerol Fraction in Solid Fuel Grate Boiler

2015 ◽  
Vol 237 ◽  
pp. 301-306
Author(s):  
Marek Swat
Keyword(s):  
Solid Fuel ◽  
Emission Factor ◽  
Combustion Process ◽  
Biofuel Production ◽  
Solid Fuels ◽  
Waste Glycerol ◽  
Innovative Method ◽  
Fuel Delivery ◽  
Production Technologies ◽  
Combustion Of Solid Fuels

The possibility of the economic utilisation of the glycerine phase and soaps will decide on the profitability of biofuel production technologies. A concept of using waste glycerol fraction, which is a by-product of esterification, as an energy source in a typical solid fuel grate boiler is investigated. Based on studies of the combustion of glycerol fraction in an adapted commercial boiler, it was found that the combustion process of glycerol fraction is very different from the combustion of solid fuels. Established technology for fuel delivery (injection into the combustion chamber) determines the dynamics of the combustion process and the intensity of oxidation, and its effects can be controlled by the characteristics of the injection of glycerol phase. It is possible to use glycerol fraction as an alternative fuel that is neutral for the environment (CO2 emission factor = 0) in a typical solid fuel grate boiler.

Modeling of Solid Fuel Combustion in Furnaces with a Circulating Fluidized Bed

2008 ◽  
Vol 39 (1) ◽  
pp. 65-78
Author(s):  
Yu. S. Teplitskii ◽  
V. A. Borodulya ◽  
V. I. Kovenskii ◽  
E. P. Nogotov
Keyword(s):  
Fluidized Bed ◽  
Solid Fuel ◽  
Circulating Fluidized Bed ◽  
Fuel Combustion ◽  
Solid Fuel Combustion
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