Thermoeconomic Optimization and Comparison of Plate-Fin Heat Exchangers Using Louver, Offset Strip, Triangular and Rectangular Fins Applied in 200 kW Microturbines

Maghsoudi, Peyman; Sadeghi, Sadegh; Hanafizadeh, Pedram

doi:10.1115/1.4036618

Cited by 14 publications

(3 citation statements)

References 25 publications

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“…They indicated a very good match between the multi-objective and the single-objective optimum values regarding exergy efficiency and total cost; however, significant differences were observed for pressure drop. Maghsoudi et al [14] studied four plate-fin heat exchangers with 200 kw microturbines. Multi-objective optimization algorithm, NSGA-II, is employed to maximize the efficiency of the recuperator and minimize its total cost, simultaneously.…”

Section: Introductionmentioning

confidence: 99%

Fluid-Dynamics Analysis and Structural Optimization of a 300 kW MicroGas Turbine Recuperator

He¹,

Wang²,

Pan³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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Computational Fluid Dynamics (CFD) is used here to reduce pressure loss and improve heat exchange efficiency in the recuperator associated with a gas turbine. First, numerical simulations of the high-temperature and lowtemperature channels are performed and, the calculated results are compared with experimental data (to verify the reliability of the numerical method). Second, the flow field structure of the low-temperature side channel is critically analyzed, leading to the conclusion that the flow velocity distribution in the low-temperature side channel is uneven, and its resistance is significantly higher than that in the high-temperature side. Therefore, five alternate structural schemes are proposed for the optimization of the low-temperature side. In particular, to reduce the flow velocity in the upper channel, the rib length of each channel at the inlet of the low-temperature side region is adjusted. The performances of the 5 schemes are compared, leading to the identification of the configuration able to guarantee a uniform flow rate and minimize the pressure drop. Finally, the heat transfer performance of the optimized recuperator structure is evaluated, and it is shown that the effectiveness of the recuperator is increased by 1.5%.

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Section: Introductionmentioning

confidence: 99%

Fluid-Dynamics Analysis and Structural Optimization of a 300 kW MicroGas Turbine Recuperator

He¹,

Wang²,

Pan³

et al. 2023

Fluid Dynamics &Amp; Materials Processing

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“…Micro gas turbines are one of the most widely-used and efficient fuel-burning engines capable of producing mechanical energy and heat (Verstraete and Bowkett, 2015). Micro gas turbines are extensively used as cooling heating and power (CCHP) systems in commercial and residential buildings, schools and hospitals (Maghsoudi et al , 2017). The growing popularity of micro gas turbines has led to numerous efforts for promising promotions in design and efficiency of these systems.…”

Section: Introductionmentioning

confidence: 99%

A multi-factor methodology for evaluation and optimization of plate-fin recuperators for micro gas turbine applications considering payback period as universal objective function

Maghsoudi

Sadeghi

Xiong

et al. 2019

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Purpose Because of the appreciable application of heat recovery systems for the increment of overall efficiency of micro gas turbines, promising evaluation and optimization are crucial. This paper aims to propose a multi-factor theoretical methodology for analysis, optimization and comparison of potential plate-fin recuperators incorporated into micro gas turbines. Energetic, exergetic, economic and environmental factors are covered. Design/methodology/approach To demonstrate applicability and reliability of the methodology, detailed thermo-hydraulic analysis, sensitivity analysis and optimization are conducted on the recuperators with louver and offset-strip fins using a genetic algorithm. To assess the relationship between investment cost and profit for the recuperated systems, payback period (PBP), which incorporates all the factors is used as the universal objective function. To compare the performance of the recuperated and non-recuperated systems, exergy efficiency, exergy destruction and corresponding cost rate, fuel consumption and environmental damage cost rates, capital and operational cost rates and acquired profit rates are determined. Findings Based on the results, optimal PBP of the louvered-fin recuperator (147 days) is slightly lower than that with offset-strip fins (153 days). The highest profit rate is acquired by reduction of exergy destruction cost rate and corresponding decrements for louver and offset-strip fins are 2.3 and 3.9 times compared to simple cycle, respectively. Originality/value This mathematical study, for the first time, focuses on introducing a reliable methodology, which covers energetic, exergetic, economic and environmental points of view beneficial for design and selection of efficient plate-fin recuperators for micro gas turbine applications.

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“…The heat exchangers are stereotype facilities that have been a source of many challenges in this way. Still, they are challenging technology and call for more innovation and better performance [5]. Day by day, due to the limitation on energy consumption and operational dimension, heat exchanger design have been oriented to higher performance and smaller size and exploitation of nano fluid as well [6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

A Three-Dimensional Thermo-hydrodynamic Simulation of Compact Cross-Flow Plate Heat Exchanger

2019

PCII

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This study is dedicated to the thermal analysis and thermo-hydrodynamic simulation of an air-to-air plate heat exchanger in order to solve its routine problem in industry. The compact type of cross-flow plate heat exchanger, in which corrugated plates pile up tightly and delicately brazed to each other, has been used in many situations and has many applications from food industries to petroleum and military. Routinely, after a certain lifespan, the brazed joints are detached and cause a mixture of hot and cold fluids as well as highly reduction of heat exchanger performance. This problem leads to increase the system maintenance significantly. Apart from the imposed cost and time for its maintenance, which is indeed a crucial problem? Finally, to have a better understanding, a threedimensional numerical investigation on thermo-hydrodynamic analysis of conjugate heat transfer was performed using computational fluid dynamics techniques. Forced convection heat transfer for fluid flow and conduction through solid material were considered as well. For simulation of steady state flow of Newtonian fluid, the governing equation was discredited by finite volume method and solved by the semi-implicit method for the pressure-linked equation. It was also found that both temperature and temperature gradient play an important role in this problem.

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Thermoeconomic Optimization and Comparison of Plate-Fin Heat Exchangers Using Louver, Offset Strip, Triangular and Rectangular Fins Applied in 200 kW Microturbines

Cited by 14 publications

References 25 publications

Fluid-Dynamics Analysis and Structural Optimization of a 300 kW MicroGas Turbine Recuperator

Fluid-Dynamics Analysis and Structural Optimization of a 300 kW MicroGas Turbine Recuperator

A multi-factor methodology for evaluation and optimization of plate-fin recuperators for micro gas turbine applications considering payback period as universal objective function

A Three-Dimensional Thermo-hydrodynamic Simulation of Compact Cross-Flow Plate Heat Exchanger

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