Impact of velocities and geometry on flow components and heat transfer in plate heat exchangers

Dović, Damir; Horvat, Ivan; Filipović, Petar

doi:10.1016/j.applthermaleng.2021.117371

Cited by 18 publications

(3 citation statements)

References 28 publications

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“…This allows for plates of small thicknesses down to about 0.3 mm, decreasing the consumption of costly metals and the PHE weight; (ii) The PHE channels with contact points for the corrugations inside have a geometrical form inducing a change in flow direction and high levels of turbulence, swirl and vortex structures. This happens even at relatively low Reynolds numbers, as shown by various researchers (see, e.g., [11]). It creates a peculiar mechanism of heat transfer enhancement with a rather smooth transition from a laminar to a turbulent flow regime; (iii) Heat transfer coefficients in PHEs are much higher than in traditional shell-and-tube heat exchangers, and a significantly smaller heat transfer area is required, which makes them much more compact, with smaller area needs for maintenance; (iv) The area of the heat transfer surface in PHEs is made of thin metal plates and requires much less material than in shell-and-tube heat exchangers.…”

Section: Phes and Their Types Of Constructionmentioning

confidence: 60%

“…CFD simulations are a powerful tool for the study of flow structure and heat transfer in PHE channels with complicated geometries and flow distribution between channels. They can improve the understanding of heat transfer enhancement principles and help in estimating local process characteristics, as in [11]. However, they can only be considered in terms of numerical experiments with flow models.…”

Section: Cfd Modelling Of Hydrodynamics and Heat Transfer In Phe Chan...mentioning

confidence: 99%

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Review of Developments in Plate Heat Exchanger Heat Transfer Enhancement for Single-Phase Applications in Process Industries

et al. 2023

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A plate heat exchanger (PHE) is a modern, effective type of heat transfer equipment capable of increasing heat recuperation and energy efficiency. For PHEs, enhanced methods of heat transfer intensification can be further applied using the analysis and knowledge already available in the literature. A review of the main developments in the construction and exploration of PHEs and in the methods of heat transfer intensification is presented in this paper with an analysis of the main construction modifications, such as plate-and-frame, brazed and welded PHEs. The differences between these construction modifications and their influences on the thermal and hydraulic performance of PHEs are discussed. Most modern PHEs have plates with inclined corrugations on their surface that create a strong, rigid construction with multiple contact points between the plates. The methods of PHE exploration are mostly experimental studies and/or CFD modelling. The main corrugation parameters influencing PHE performance are the corrugation inclination angle in relation to the main flow direction and the corrugation aspect ratio. Optimisation of these parameters is one way to enhance PHE performance. Other methods of heat transfer enhancement, including improving the form of the plate corrugations, use of nanofluids and active methods, are considered. Future research directions are proposed, such as improving fundamental understanding, developing new corrugation shapes and optimisation methods and area and cost estimations.

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Section: Phes and Their Types Of Constructionmentioning

confidence: 60%

Section: Cfd Modelling Of Hydrodynamics and Heat Transfer In Phe Chan...mentioning

confidence: 99%

Review of Developments in Plate Heat Exchanger Heat Transfer Enhancement for Single-Phase Applications in Process Industries

et al. 2023

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“…Sci. 2024, 14, 220 2 of 20 only to improve the operating efficiency within the device, but also to improve the heat transfer efficiency between the device components [14][15][16]. As an illustrative instance, conventional screw extruders offer an insightful context for the examination of convective heat transfer efficiency [17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation and Experimental Research on Heat Transfer Characteristics Based on Internal Meshing Screw

Hao,

Guo,

et al. 2023

Applied Sciences

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The mixing and processing of high-viscosity materials play a pivotal role in composite material processing. In this context, the internal meshing screw mixer, rooted in volume extensional rheology, offers distinct advantages, including heightened mixing efficiency, exceptional material adaptability, and favorable thermomechanical properties. This research endeavors to advance our understanding of these qualities by presenting an in-depth exploration of internal meshing screw mixing. To facilitate this, an internal meshing screw mixing experimental apparatus was meticulously constructed, accompanied by extensive numerical simulations and experimental investigations into its heat transfer characteristics. Two distinct heat transfer modes are established: Mode 1 entails the transfer of the high temperature from the outer wall of the stator to the interior, while Mode 2 involves the transmission of the high temperature from the inner wall of the rotor to the exterior. The ensuing research yields several notable findings: 1. It is evident that higher rotational speeds lead to enhanced heat transfer efficiency across the board. However, among the three rotational speeds examined, 60 rpm emerges as the optimal parameter for achieving the highest heat transfer efficiency. Furthermore, within this parameter, the heat transfer efficiency is superior in Mode 1 compared to Mode 2. 2. As eccentricity increases, a corresponding decline in comprehensive heat transfer efficiency is observed. Moreover, the impact of eccentricity on heat transfer efficiency becomes increasingly pronounced over time. 3. A lower gap dimension contributes to higher heat transfer within the system. Nevertheless, this heightened heat transfer comes at the expense of reduced stability in the heat transfer process. 4. It is demonstrated that heat transfer in Mode 1 primarily follows a convection heat transfer mechanism, while Mode 2 predominantly exhibits diffusion-based heat transfer. The heat transfer efficiency of Mode 1 significantly surpasses that of Mode 2. This research substantiates its findings with the potential to enhance the heat transfer efficiency of internal meshing screw mixers, thereby making a valuable contribution to the field of polymer engineering and science.

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The influence of plates corrugations angle on PHE thermal performance in condensing of steam with the presence of air

et al. 2023

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Impact of velocities and geometry on flow components and heat transfer in plate heat exchangers

Cited by 18 publications

References 28 publications

Review of Developments in Plate Heat Exchanger Heat Transfer Enhancement for Single-Phase Applications in Process Industries

Review of Developments in Plate Heat Exchanger Heat Transfer Enhancement for Single-Phase Applications in Process Industries

Numerical Simulation and Experimental Research on Heat Transfer Characteristics Based on Internal Meshing Screw

The influence of plates corrugations angle on PHE thermal performance in condensing of steam with the presence of air

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