Avoidable and unavoidable exergy destruction and exergoeconomic evaluation of the thermal processes in a real industrial plant

Vučković, Goran; Vukić, Mića; Stojiljković, Mirko M.; Vučković, Dragan

doi:10.2298/tsci120503181v

Cited by 24 publications

(9 citation statements)

References 17 publications

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“…According to Vuckovic et al. [ 53 ], however, circulation pumps of a steam boiler have the greatest potential for improvement because the exergy destruction is avoidable in the steam boiler. The air compressor has a high exergy efficiency of 73.55%, when compared with the other utility equipment that work in line with the mixer, such as the NH 3 compressor (52.08%), treated H 2 O pump (0.63%), and syrup pump (0.83%).…”

Section: Resultsmentioning

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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Section: Resultsmentioning

confidence: 99%

Exergoeconomic analysis of an industrial beverage mixer system

Okereke

Lasode

Ohijeagbon

2020

Heliyon

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“…For evaluating the performance of a system from different viewpoints, it is necessary to perform the energy analysis of the whole system. The general forms of the mass and energy balance equations for a control volume at steady-state flow are expressed [27]:…”

Section: The Energy Analysis Of the Absorption Chiller Network Plantmentioning

confidence: 99%

Thermo-economic analysis and optimization of the steam absorption chiller network plant

et al. 2022

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Absorption chillers are one of the most used equipment in industrial, commercial, and domestic applications. For the places where high cooling is required, they are utilized in a network to perform the cooling demand. The main objective of the current study was to find the optimum operating conditions of a network of steam absorption chillers according to energy and economic viewpoints. Firstly, energy and economic analysis and modeling of the absorption chiller network were carried out to have a deep understanding of the network and investigate the effects of operating conditions. Finally, the particle swarm optimization search algorithm was employed to find an optimum levelized total costs of the plant. The absorption chiller network plant of the Marun Petrochemical Complex in Iran was selected as a case study. To verify the simulation results, the outputs of energy modeling were compared with the measured values. The comparison with experimental results indicated that the developed model could predict the working condition of the absorption chiller network with high accuracy. The economic analysis results revealed that the levelized total costs of the plant is 1730 $/kW and the payback period is three years. The optimization findings indicated that working at optimal conditions reduces the levelized total costs of the plant by 8.5%, compared to the design condition.

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“…A specific approach for assessing the opportunities for efficiency improvement of a real industrial plant is demonstrated in [12]. It includes both conventional and advanced exergy analyses and exergy-economic method and provides useful information about interactions among the components, revealing the real potential for improvement of the whole system and its components.…”

Section: Introductionmentioning

confidence: 99%

Steam system optimization of an industrial heat and power plant

Filkoski

Lazarevska

Mladenovska³

et al. 2020

THERM SCI

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Improvement of the energy conversion processes efficiency helps to achieve a more reliable energy supply, a cleaner environment, more competitive businesses, and higher living standard. Industry data indicate significant potential for improving the efficiency of steam systems and minimizing their operating costs by implementing various measures. The present work is a result of a systematic approach for energy performance analysis and identification of opportunities for optimizing the steam-condensate system of the combined heat and power plant ESM Energetika, Skopje, R. N. Macedonia. The boiler plants provide superheated steam used in a hot-water station for the district heating system, for electricity generation, and as process steam for industrial customers. As the main operating costs of the plant stem from the natural gas consumption, the implementation of a set of energy efficiency measures will lead to its reduction, accompanied by less environmental impact. As a result of the system analysis, a number of energy efficiency measures have been identified. For each measure, the impact on individual parts of the system, as well as on the system as a whole, is evaluated using the Steam System Modeler Tool. This paper elaborates some of the identified measures that are considered more reliable from an operational and financial aspect, mainly focused on steam production for the district heating system. Based on a conservative approach, significant potential for savings of natural gas, electrical energy, and treated water is estimated, which will lead to annual financial savings of about 245000 Euro.

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Avoidable and unavoidable exergy destruction and exergoeconomic evaluation of the thermal processes in a real industrial plant

Cited by 24 publications

References 17 publications

Exergoeconomic analysis of an industrial beverage mixer system

Exergoeconomic analysis of an industrial beverage mixer system

Thermo-economic analysis and optimization of the steam absorption chiller network plant

Steam system optimization of an industrial heat and power plant

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