Effect of equivalence ratio on the performance of the downdraft gasifier – An experimental and modelling approach

Upadhyay, Darshit S.; Sakhiya, Anil Kumar; Panchal, Krunal R.; Patel, Amar H.; Patel, Rajesh N.

doi:10.1016/j.energy.2018.11.133

Cited by 83 publications

(16 citation statements)

References 52 publications

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“…As shown in the figure, both FCR and SGR increased as the increase of ER. This phenomenon is also reported in previous studies [17,18]. The FCR and SGR increased of about 30%-33% from ER 0.18 to ER 0.28.…”

Section: Flame Of Producer Gassupporting

confidence: 90%

Design and Preliminary Testing of a Small-Scale Throatless Fixed-Bed Downdraft Gasifier Fueled With Sengon Wood Block

Anis

Nugroho

Kusumastuti

2021

ARFMTS

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The aims of this study are to design and to find out the performance of a throatless fixed bed downdraft gasifier. This gasifier was used to convert sengon wood block from furniture waste into gas fuel called producer gas that is beneficial for green energy production to substitute the fossil fuel. The gasifier was designed to have a thermal power of 30 kWth with double wall/tube and air as the gasifying medium. Sengon wood block with a size of about 5-8 m3 and moisture content of 10 % was used as the feedstock. The gasifier was tested at various equivalence ratio ranging from 0.18 to 0.28. In this work, the performance of the gasifier was evaluated by observing the temperature profile, flame condition, fuel consumption rate, specific gasification rate, and the amount of solid residue. The results showed that the designed gasifier had a diameter of 22 cm for the inner tube and 32 cm for the outer tube with a gasifier height of 100 cm. It was found that the equivalence ratio highly influenced the gasifier performance. Fuel consumption rate and specific gasification rate increased with the increase of equivalence ratio. In the meantime, the amount of solid residue appeared to be reduced because of high gasification rate. Under the condition investigated, the best gasifier performance was obtained at an equivalence ratio of 0.28 indicated by the stability of the flame during gasification process that is in accordance to the gasifier design parameters.

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Section: Flame Of Producer Gassupporting

confidence: 90%

Design and Preliminary Testing of a Small-Scale Throatless Fixed-Bed Downdraft Gasifier Fueled With Sengon Wood Block

Anis

Nugroho

Kusumastuti

2021

ARFMTS

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“…A proper ER = lprj tu'vtr t%k lprj w'p%ux%plj'k%u t%k 18A high ER indicates more oxidation to gasify the biomass; a lower ER produces more char due to pyrolysis. As reported by (Upadhyay, Sakhiya, Panchal, Patel, & Patel, 2019), the optimum ER value is 0.24-0.36. Thus, in the present study the ER value varied from 0.25 to 0.35.…”

Section: Model Validationmentioning

confidence: 64%

Thermodynamic Study of Palm Kernel Shell Gasification for Aggregate Heating in an Asphalt Mixing Plant

Putro

Pranolo

Waluyo

et al. 2020

Int. J. Renew. Energy Dev.

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This study evaluated thermodynamically the performance of conversion of palm kernel shells into combustible gas through gasification technology for aggregate heating in a hot-mixed asphalt production plant by developing a thermodynamic model using licensed Aspen Plus v.11 software. The effects of the equivalence ratio (ER) in the gasification process and the amount of combustion air to combustible gas to attain the required aggregate temperature were investigated. The thermodynamic model showed a good agreement with the experimental results based H2 and CO contain in producer gas which provided by maximum root mean square errors value of 8.82 and 6.42 respectively. Gasification of 30–35 kg of palm kernel shells in a fixed-bed gasifier reactor using air as a gasifying agent at an ER of 0.325–0.350 generated gaseous fuel for heating 1 ton of aggregate to a temperature of 180–200°C with combustion excess air 10%–20%. ©2020. CBIORE-IJRED. All rights reserved

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“…These values, however, cannot be considered constant for all downdraft gasifiers, as they depend on the size of the reaction zone, fuel and air consumption, particle sizes, and others. In addition, a gas-holder will improve the reliability of the power supply and expand the power range covered by the gasifier (including in the area of low loads) [98][99][100].…”

Section: Calculation Results and Discussionmentioning

confidence: 99%

Evaluation of the Effectiveness of Joint Use of Wood and Other Renewable Energy Sources in the Baikal Region

et al. 2022

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This paper addresses the assessment of woody biomass resources in Russia and the Baikal region. The analysis of the literature demonstrates that the Baikal region has considerable amounts of waste from the logging, timber processing, and pulp and paper industries (up to 220 PJ). A review of utilization technologies for woody biomass demonstrates that the existing technologies based on biomass gasification are promising for energy purposes. The gasification of biomass for small-capacity power plants has some advantages compared to its combustion. This paper considers an autonomous power system that consists of photovoltaic converters, wind turbines, storage batteries, a biomass gasification power plant, and a diesel power plant. A mathematical model used to optimize the system’s structure finds the minimum of the total discounted costs for the creation and operation of the system with some constraints met. Based on mathematical modeling, the cost-effectiveness of such a power supply system is assessed for different climatic zones of the Baikal region and the coastal area of Lake Baikal. The findings indicate that the optimal solution is the integration of various renewable energy sources in hybrid power systems. The proportion of energy sources of different types in the installed capacities is found. The study demonstrates that the optimal structure of the power system can provide significant savings (the total discounted costs are reduced by almost 2.5 times compared to the option using a diesel power plant alone).

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Effect of equivalence ratio on the performance of the downdraft gasifier – An experimental and modelling approach

Cited by 83 publications

References 52 publications

Design and Preliminary Testing of a Small-Scale Throatless Fixed-Bed Downdraft Gasifier Fueled With Sengon Wood Block

Design and Preliminary Testing of a Small-Scale Throatless Fixed-Bed Downdraft Gasifier Fueled With Sengon Wood Block

Thermodynamic Study of Palm Kernel Shell Gasification for Aggregate Heating in an Asphalt Mixing Plant

Evaluation of the Effectiveness of Joint Use of Wood and Other Renewable Energy Sources in the Baikal Region

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