Performance degradation due to longitudinal heat conduction in very high NTU counterflow heat exchangers

Narayanan, Sriharini; Venkatarathnam, G.

doi:10.1016/s0011-2275(98)00064-2

Cited by 20 publications

(2 citation statements)

References 2 publications

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“…Many researchers have pointed out that LHC degraded the heat transfer performance [6,9]. It is easily found that the heat transfer performance is greatly reduced by a strong LHC effect.…”

Section: Effect Of Small-scale Longitudinal Heat Conduction On Unbalamentioning

confidence: 99%

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A Numerical Study of Small-Scale Longitudinal Heat Conduction in Plate Heat Exchangers

Borjigin

Zeng

et al. 2018

Energies

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Abstract:Longitudinal heat conduction has a significant effect on the heat transfer performance of plate heat exchangers, but longitudinal heat conduction is usually neglected in numerical studies and the thermal design of a heat exchanger. In this paper, heat transfer models with and without longitudinal heat conduction are proposed to analyze the effect of small-scale longitudinal heat conduction in a plate heat exchanger. The performance of small-scale longitudinal heat conduction is illustrated by temperature and heat flux contours in the heat transfer models with and without longitudinal heat conduction. The results show that small-scale longitudinal heat conduction occurs in the plate and a more uniform temperature profile of the plate is obtained due to small-scale longitudinal heat conduction. In balanced flow, the contributions of longitudinal heat conduction for counter-flow, cross-flow and parallel-flow plate heat exchangers are −3.15%, −0.09% and 0, respectively, whereas, for the respective unbalanced flows they are evaluated to be −1.73%, 0.53% and 0.05%, respectively. Moreover, it is observed that small-scale longitudinal heat conduction in plates is influenced by the thermal conductivity of the plate. The higher the thermal conductivity, the larger is the reduction of thermal performance. The contribution of longitudinal heat conduction varies from −0.54% to −4.01%.

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“…Many researchers have pointed out that LHC degraded the heat transfer performance [6,9]. It is easily found that the heat transfer performance is greatly reduced by a strong LHC effect.…”

Section: Effect Of Small-scale Longitudinal Heat Conduction On Unbalamentioning

confidence: 99%

“…The effects of LHC on the inner and outer walls of the perforated plate matrix heat exchanger (MHE) were studied by Venkatarathnam and Narayanan [8,9]. There is only one inner wall in MHE.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Study of Small-Scale Longitudinal Heat Conduction in Plate Heat Exchangers

Borjigin

Zeng

et al. 2018

Energies

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Performance analysis of counter flow plate-fin heat exchangers considering the effect of longitudinal conduction

Wang

et al. 2005

Proceedings of the Twentieth International Cryogenic Engineering Conference (ICEC20)

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The effect of longitudinal heat conduction in cross flow indirect evaporative air coolers

Hettiarachchi

Golubovic

Worek

2007

Applied Thermal Engineering

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Performance degradation due to longitudinal heat conduction in very high NTU counterflow heat exchangers

Cited by 20 publications

References 2 publications

A Numerical Study of Small-Scale Longitudinal Heat Conduction in Plate Heat Exchangers

A Numerical Study of Small-Scale Longitudinal Heat Conduction in Plate Heat Exchangers

Performance analysis of counter flow plate-fin heat exchangers considering the effect of longitudinal conduction

The effect of longitudinal heat conduction in cross flow indirect evaporative air coolers

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