Experimental facility for analysis of biomass combustion characteristics

Miljković, Biljana

doi:10.2298/tsci120928119m

Cited by 6 publications

(5 citation statements)

References 10 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Experimental rig Figure 1 shows a schematic diagram of the experimental rig. The rig consists of a vertical cylindrical combustion chamber, height of 1080 mm and inside diameter of 230 mm, as it has been described in [29]. The chamber is made from chromium sheet steel 2 mm thick, coated with 50 mm thick ceramic wool, covered by a thick layer of external casing.…”

Section: Methodsmentioning

confidence: 99%

“…The heat, generated in the reaction front, is transported against the flow of combustion air and dries and devolatilises the raw straw. Due to opposite directions of heat and air-flow, the heat is not transported downwards far from the reaction zone and hence the reaction front stays very thin during the ignition propagation stage [29,36]. Since the heterogeneous char oxidation is relatively slow and oxygen is consumed first by the volatile gases from the particles, carbonised particles remain above the ignition front.…”

Section: Mass Loss Historymentioning

confidence: 99%

“…His work was extended by Zhou et al [28] who developed a 1-D model of fixed-bed straw combustion and validated the results with the experimental measurements of temperature, gas emissions, ignition front propagation rate, and flame temperature. Miljković [29] investigated wheat straw combustion in fixed bed combustor. Her work was focused on defining mass loss rate as a function of time for different combinations of bulk density and air-flow velocity.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Experimental analysis of the influence of air-flow rate on wheat straw combustion in a fixed bed

Čepič

Nakomčić-Smaragdakis

2017

THERM SCI

View full text Add to dashboard Cite

Biomass in the form of crop residues represents a significant energy source in regions whose development is based on agricultural production. Among many possibilities of utilizing biomass for energy generation, combustion is the most common. With the aim of improving and optimizing the combustion process of crop residues, an experimental rig for straw combustion in a fixed bed was constructed. This paper gives a brief review of working characteristics of the experimental rig, as well as the results for three different measuring regimes, with the purpose to investigate the effect of air-flow rate on the wheat straw combustion in a fixed bed. For all three regimes analysed in this paper bulk density of the bed was the same, 60 kg/m 3 , combustion air was without preheating and air-flow rates were: 1152, 1872, and 2124 kg/m 2 h. The effect of air-flow rate on the ignition rate, burning rate, temperature profile of the bed and flue gas composition were analysed. It was concluded that in the regime with the lowest air-flow rate progress of combustion had two clearly conspicuous stages: the ignition propagation stage and the char and unburned material oxidation stage. At the highest air-flow rate the entire combustion occurred mostly in a single stage, due to increased air supply oxidized the char, remaining above the ignition front, simultaneously with the reactions of volatiles. Despite that, the optimal combustion process, the highest value of ignition rate, burning rate, and bed temperature was achieved with air-flow rate of 1872 kg/m 2 h.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: Mass Loss Historymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental analysis of the influence of air-flow rate on wheat straw combustion in a fixed bed

Čepič

Nakomčić-Smaragdakis

2017

THERM SCI

View full text Add to dashboard Cite

show abstract

“…Miljković [17] presented an experimental facility which offers an effective way to simulate grate combustion in a real facility.…”

Section: Introductionmentioning

confidence: 99%

Modeling for Pyrolysis of Solid Biomass

Miljković

Nikolovski

Mitrović

et al. 2019

Period. Polytech. Chem. Eng.

Self Cite

View full text Add to dashboard Cite

In comparison to coal, biomass is characterized by a higher content of volatile matter. It is a renewable source of energy which has many advantages from an ecological point of view. Understanding the physical phenomena of pyrolysis and representing them with a mathematical model is the primary step in the design of pyrolysis reactors. In the present study, an existing mathematical model is used to describe the pyrolysis of a single solid particle of biomass. It couples the heat transfer equations with the chemical kinetics equations.A finite difference method is used for solving the heat transfer equation and the two-step pyrolysis kinetics equations. The model equation is solved for a slab particle of equivalent dimension 0.001 m and temperature ranging from 300 to 923 K. An original numerical model for the pyrolysis of wood chips is proposed and relevant equations solved using original program realized in MATLAB.To check the validity of the numerical results, experimental results of pyrolysis of woody biomass in laboratory facility was used.The samples were heated over a range of temperature from 300 to 923 K with three different heating rates of 21, 32 and 55 K/min, and the weight loss was measured. The simulation results as well as the results obtained from thermal decomposition process indicate that the temperature peaks at maximum weight loss rate change with the increase in heating rate. The experimental results showed that the simulation results are in good agreement and can be successfully used to understand the degradation mechanism of solid reaction.

show abstract

“…Clean sources of renewable energy include geothermal, hydropower, solar photovoltaic, concentrated solar thermal power, wind power, and ocean power (REN21, 2014). Traditional renewable sources are those using biopower, which include the use of wood or biomass, municipal solid waste, or agricultural waste to produce electricity, usually through a process of combustion (Miljkovic, 2015).…”

Section: Introductionmentioning

confidence: 99%

Energy Security: Shaping the Consumer Decision Making Process in Emerging Economies

Loper

Crittenden

2017

OMEE

View full text Add to dashboard Cite

Energy security is a universal concern among all countries, with all nations struggling for a sustainable solution. Solar technologies are a particularly beneficial utility for emerging economies due to both geography and affordability. Solar Photovoltaics (PV) is one of the highest potential growth markets in emerging economies due to the ability for small-scale systems to be placed on residential rooftops. Distribution of PV to individual homeowners is a new buying and selling process for what has traditionally been a business-to-business marketplace. Because the consumer market is at an infant stage in emerging economies, the messages that PV companies send to consumers will ultimately shape consumer perception about renewable energy. Through content analysis of websites from 12 companies in two of the BRICS markets, this research explores the similarities and differences with regard to consumer-facing messages among companies of various sizes in the two markets.

show abstract

Experimental facility for analysis of biomass combustion characteristics

Cited by 6 publications

References 10 publications

Experimental analysis of the influence of air-flow rate on wheat straw combustion in a fixed bed

Experimental analysis of the influence of air-flow rate on wheat straw combustion in a fixed bed

Modeling for Pyrolysis of Solid Biomass

Energy Security: Shaping the Consumer Decision Making Process in Emerging Economies

Contact Info

Product

Resources

About