Exergetic Modelling of Oil-Fired Steam Boilers

Ohijeagbon, IO; Waheed, M.A.; Jekayinfa, SO; Lasode, OA

doi:10.4314/njt.v33i4.13

Cited by 4 publications

(2 citation statements)

References 16 publications

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“…It follows from their study that; the irreversibility is maximum in the boiler than in the other components of the system. Studies carried out by Ohijeagbon et al [4] on the exergetic modelling of a steam boiler of oil fire shows that the destroyed exergy in the boiler decreased to 14.6% as the evaporation ratio increased from 10 to 14. The authors showed that the major area to control irreversibility resulting from entropy effects is the combustion product entropy which leads to increased exergy destruction in combustion unit.…”

Section: Introductionmentioning

confidence: 99%

Exergetic and Energetic Analysis of a Traditional Semi-Industrial Comorian Ylang-Ylang Essential Oil Wood Fire Distiller

Ahamadi¹,

Saindou²,

Rakotondramiarana³

2019

EJERS

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In this article a study of the energy performance of a distillation system of ylang-ylang essential oil on a wood fire was carried out. To do this an analysis using the first and the second low of thermodynamics was made for each component of the distillation system. The analysis showed that the energy efficiency depends on the fration of oil to be distilled and that the whole system is very deficient. The exergetic and energetic analysis shows that it is in the combustion chamber that has a large amount of destroyed exergy and a strong energetic loss. The velocity of the air entering at the combustion chamber greatly influences the efficiency of the chamber. Indeed it has been found that the destruction of the exergy increases with the velocity of the air incoming air.

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Section: Introductionmentioning

confidence: 99%

Exergetic and Energetic Analysis of a Traditional Semi-Industrial Comorian Ylang-Ylang Essential Oil Wood Fire Distiller

Ahamadi¹,

Saindou²,

Rakotondramiarana³

2019

EJERS

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“…Exergy losses remain a major challenge in many industrial processes [ 10 ] and cannot be identified with conventional energy analysis. More recently, exergy analysis has been used to analyze manufacturing processes and equipment, including the evaluation of ultra-high-temperature milk pasteurization plants, assessment of the efficiency of industrial food chains, development of a more sustainable chemical industry advancement procedure, ethanol production process analysis, assessment of a burner in cement production processes, analysis of a refrigeration system in a typical beverage manufacturing plant, vegetable oil production process analysis, cryogenic air separation plants, and steam boiler analysis [ 11 , 12 , 13 , 14 , 15 , 16 , 17 , 56 , 57 ]. Exergy analysis has been established as a tool commonly used to determine the quality of energy and resource of any system or process.…”

Section: Introductionmentioning

confidence: 99%

Exergoeconomic analysis of an industrial beverage mixer system

Okereke

Lasode

Ohijeagbon

2020

Heliyon

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Exergoeconomic analysis is a tool used to identify hidden costs associated with a machine or a system that cannot be identified using typical cost management techniques applied in the industry. While exergoeconomic analysis finds applications in power system innovations and optimization, it has not yet been harnessed by the manufacturing industry to reduce operating costs. The purpose of this study is to use exergoeconomic analysis to identify hidden costs in manufacturing processes, with a focus on the industrial beverage mixer system. The study proposes a methodology of identifying the hidden financial losses in the system and recommends modifying the systems operation and design as a measure to reduce costs and increase profitability. Thermodynamic and economic data for the study were obtained from manufacturing plants. An exergy cost analysis was performed using thermoeconomic analysis software. Exergoeconomic values and variables were obtained using equations based on extant literature. The results reveal that the mixer possesses a low exergoeconomic factor of 5.50% owing to the high irreversibility of the H 2 O reservoir, flow-mix reservoir, and carbonator. The total hidden cost of the system equaled 733.04 $/h, of which 99.0% is contributed by the mixer. Improvements to the deaeration technique for the H 2 O reservoir of the mixer component, as well as the H 2 O treatment procedure, can reduce the irreversibility of the H 2 O reservoir and the hidden costs.

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