Optimization of a finned heat sink array based on thermoeconomic analysis

This article presents a conceptual design of a heat sink combining a porous medium whose matrix is highly conductive and a fin. A simplified model is presented to estimate the performance of the system, relying on Darcy law and local thermal equilibrium. The objective is to minimize the hot-spot temperature under global mass constraint by using an optimization procedure based on genetic algorithms. The design variables are the porosity and material of each layer of the porous medium, the fin material, height, and width, the aspect ratio of the heat sink, and the shape of a weightless upper corner deflector which reduces the width of the inlet and outlet air slots while removing the less useful mass. Results show that the optimal porous layers were generally of copper, independent of the mass constraint. However, the fin is mostly beneficial for heavier designs, while the deflector becomes more important when lightness is required. These two special features show their efficiency by allowing a mass reduction of 95% with a decrease of only 24% in the cooling performance.

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“…The pressure field is first calculated by solving Eq. (8). The velocity components are then deduced from Eq.…”

Section: Heat and Fluid Flow Numerical Calculations And Validationmentioning

confidence: 99%

“…The designing of these systems, which can be viewed as the answer to how to organize the fluid flow and solid constituents (e.g., heat sink dimensions, fins shape, fins spacing, and materials) for minimal thermal resistance [1], has been studied extensively, e.g., see [2][3][4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Thermal Resistance Minimization of a Fin-and-Porous-Medium Heat Sink with Evolutionary Algorithms

Tye-Gingras

Gosselin

2008

Numerical Heat Transfer, Part A: Applications

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“…Figure 5 illustrates the single fin structure of the present MCS. The fin effectiveness e f , defined as the ratio of the heat transfer rate with the fin to the rate without the fin, 19 is the only parameter required to justify the installation of a fin-type MCS. e f can be written as…”

Section: Structure Of the Used Mcs For Effective Heat Transfer From Tmentioning

confidence: 99%

“…For a normal cooling system, the criterion for the usefulness of a fin structure is e f > 2. 19 Consequently, we can safely judge that employment of the fin structure in the MCS will result in effective heat exchange from the cold side of the TE modules to the coolant medium.…”

Section: Structure Of the Used Mcs For Effective Heat Transfer From Tmentioning

confidence: 99%

Experimental Performance of a Solar Thermoelectric Cogenerator Comprising Thermoelectric Modules and Parabolic Trough Concentrator without Evacuated Tube

Liu

Kang

et al. 2015

Journal of Elec Materi

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A prototype practical solar-thermoelectric cogenerator composed of (1) a primary component of a pile of solar-selective absorber (SSA) slab, thermoelectric (TE) modules, and a depressed water flow tube (multichannel cooling heat sink, MCS), and (2) a parabolic trough concentrator with aperture area of 2 m 9 2 m and east-west focal axis was constructed. Its cogeneration performance under the best climatic and solar insolation conditions in Guangzhou, China was tested. For simplicity, the evacuated glass tube to cover the primary component was eliminated from the system. Six Bi 2 Te 3 TE modules were arranged in series, directly bonded to the rear surface of the solar absorber slab. The hot-side temperature of the TE module reached up to 152°C. The experimentally obtained instantaneous results for the solar to electrical conversion efficiency, heat exchange coefficient of the MCS, and overall system efficiency under the best environmental and solar insolation conditions were about 1.14%, 56.1%, and 49.5%, respectively. To justify these values, an equivalent thermal network diagram based on a single-temperature-node heat transfer model representing the respective system components was used to analyze the thermal transfer and losses of the system. Finally, electrical power of 18 W was generated, with 2 L/ min of hot water at 37°C being produced and stored in the insulated container.

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“…Liquid hydrocarbons collected at the bottom of the separator flow to demethanizer column (DC). Stream (10) from top of the tower fed to pipeline as lean gas. Bottom of tower (NGL product) after passing through the LNG-exchanger enters to polishing system and then to other petrochemical units.…”

mentioning

confidence: 99%

Thermoeconomic analysis of a large industrial propane refrigeration cycle used in NGL recovery plant

Mehrpooya

Gharagheizi

Vatani

2009

Int. J. Energy Res.

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SUMMARYIn this paper a propane refrigeration cycle has been analyzed by thermoeconomic approach. This cycle is used for obtaining required refrigeration in a natural gas liquids (NGL) recovery plant. Most of the advanced methods in thermoeconomic diagnosis are examined on power plants. In this work thermoeconomic diagnosis is applied to NGL recovery plant. The impact of the component inefficiencies on the fuel plant consumption, and the effect of a component inefficiency (intrinsic malfunction) on the rest of the plant components (induced malfunctions and dysfunctions), are analyzed and quantified. The results show that thermoeconomics is not only a diagnostic tool, but also a useful tool for optimization, which can be applied to complex refrigeration processes in NGL recovery plants.

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Optimization of a finned heat sink array based on thermoeconomic analysis

Cited by 9 publications

References 21 publications

Thermal Resistance Minimization of a Fin-and-Porous-Medium Heat Sink with Evolutionary Algorithms

Thermal Resistance Minimization of a Fin-and-Porous-Medium Heat Sink with Evolutionary Algorithms

Experimental Performance of a Solar Thermoelectric Cogenerator Comprising Thermoelectric Modules and Parabolic Trough Concentrator without Evacuated Tube

Thermoeconomic analysis of a large industrial propane refrigeration cycle used in NGL recovery plant

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