Numerical study of perforated plate convective heat transfer

Tomic, Aleksandar; Živković, Milutin; Vukic, V Mica; Ilic, S Gradimir; Stojiljković, Mirko M.

doi:10.2298/tsci1403949t

Cited by 7 publications

(8 citation statements)

References 15 publications

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“…(1) and (2) the error of the heat rate for the water and air side is [12] ..... (4) ...... (5) 4 (1) (2015) [89][90][91][92][93] In the eq. 4 and 5 δρ, δV , δc, δ∆T represent deviations of the fluid density, volume flow rate, heat capacity and temperature difference between the inlet and outlet respectively, for water (indexed as w) and air (indexed as L).…”

Section: Methodsmentioning

confidence: 99%

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The analysis of the matrix heat exchanger effectiveness

Tomić¹,

Živković²,

Vukić³

et al. 2015

Savr tehnol

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The goal of this paper is to establish the optimal operating regime of the observed perforated plate air/water heat exchanger in a wide range of parameters. The experimental investigation was carried out in a package of three perforated plates which were placed in the experimental chamber and heated by hot water. A fan with the variable air volume flow was connected to the experimental chamber, so the air flow rates varied from 100 to 300 m 3 /h, while the water flow varied from 0.03 to 0.06 m 3 /h. The thermocouples were attached to the surface of the middle perforated plate in the package along its upwind and downwind sides, as well as at the inlet and outlet of the chamber and between the perforated plates. During each experiment, the readings of thermocouples were recorded alongside with the air and water volume flow and temperatures of water at the inlet and outlet of the chamber. In order to predict the performance of the observed perforated plate heat exchanger, NTU-Effectiveness analysis was performed on the basis of the experiment results and analytical relations. Experimental results showed that the effectiveness of the perforated plate heat exchanger can be calculated the same as for the concentric tube counter flow. At the end of the paper, the optimal operating point in the range of varied parameters was determined.

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Section: Methodsmentioning

confidence: 99%

“…MHE have become attractive for cryogenic applications [4,5,6]. Perforated plates are also used as solar collectors absorbers or fins for electronic equipment cooling [7,8].…”

Section: Introductionmentioning

confidence: 99%

The analysis of the matrix heat exchanger effectiveness

Tomić¹,

Živković²,

Vukić³

et al. 2015

Savr tehnol

Self Cite

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“…Although all of them gave similar results, the RNG k-ε model presented itself as the fastest converging, and therefore was adopted for the simulation. The advantage of RNG k-ε turbulence model stands in resolving flow separation and generally better performance than the standard k-ε model and better treatment of flow for lower Reynolds numbers [23][24][25]. In general, the RNG k-ε model could be written in the form of a transport equation:…”

Section: Mathematical Modelmentioning

confidence: 99%

“…6. The grid was set to square in the Y-Z plane, and the length of the cell in these two directions was varied from 0.88 to 0.2 mm, while the fluid temperature at the outlet was chosen as a quality parameter [23,26]. The results showed that under the cell size of 0.8 mm, the temperature at the outlet was varying not more than 0.1°C, tab.…”

Section: Numerical Modellingmentioning

confidence: 99%

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Experimental and numerical investigation of thermal and fluid-flow processes in a matrix heat exchanger

et al. 2019

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The need for compact heat exchangers has led to the development of many types of surfaces that enhance the rate of heat transfer, among them the matrix heat exchangers. These heat exchangers consist of a series of perforated plates mutually separated and sealed by spacers. The goal of this research was to investigate the heat transfer process of matrix heat exchangers on the air side, at the close to ambient conditions. The research was conducted in two directions-experimental research and CFD research. The experimental investigation was carried out over a perforated plate package with the porosity of 25.6%. The air/water matrix heat exchanger was heated by hot water and was installed in an experimental chamber at which entrance was a fan with the variable flow rate and heated by hot water. The thermocouples were attached to the surface of the perforated plate at the upwind and downwind sides, as well as at the inlet and the outlet of the chamber. During each experiment, the thermocouple readings and the air and water-flow and temperatures were recorded. In the numerical part of the research, the matrix heat exchangers with different plate porosity from 10 to 50% were investigated. The results of the numerical simulations were validated against the experimental results. On the basis of the experimental and numerical results, equations for heat transfer as the function of Reynolds number and geometrical parameters was established.

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Structural optimization of phase change material based heat exchanger for breathing air cooling

Huang

Duan

et al. 2021

Applied Thermal Engineering

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Numerical study of perforated plate convective heat transfer

Cited by 7 publications

References 15 publications

The analysis of the matrix heat exchanger effectiveness

The analysis of the matrix heat exchanger effectiveness

Experimental and numerical investigation of thermal and fluid-flow processes in a matrix heat exchanger

Structural optimization of phase change material based heat exchanger for breathing air cooling

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