Estimation of pressure drop in gasket plate heat exchangers

Neagu, Anisoara; Koncsag, Claudia Irina; Bărbulescu, Alina; Botez, Elisabeta

doi:10.1515/auoc-2016-0011

Cited by 11 publications

(7 citation statements)

References 1 publication

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“…For the forced convection in stationary regime, the coefficients a, b, c in Equation (3) were determined in many experimental studies but, the Kumar correlation (Equation ( 7)) is mostly recommended [18,26] to calculate Nu number when starting the development of a new and more accurate model.…”

Section: Modelingmentioning

confidence: 99%

Model Validation for the Heat Transfer in Gasket Plate Heat Exchangers Working with Vegetable Oils

Neagu

Koncsag

2022

Processes

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Many models for accurately predicting the performance of gasket plate heat exchangers were developed in the last decades, grouped in three categories: empirical, semi-analytical or theoretical/numerical, with the view to saving materials and energy through correct design of industrial equipment. This work addresses one such model, namely Lévêque correlation modified by Martin and by Dović, which is promising due to the correct assumption of the flow in sine duct channels and the consideration of energy losses caused by flow reversal at plate edges and the flow path changing when entering the chevron angle. This model was validated by our own experimental data under industrial conditions for vegetable oils processing, both in laminar flow (Re = 8–42) and fully developed turbulent flow (Re = 446–1137). Moreover, in this study, particular values for constants/parameters of the model were determined for the corrugation inclination angle relative to vertical direction equal to 30°. Through statistical analysis, this study demonstrates that this particularized form of the generalized Lévêque correlation can be used with confidence.

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Section: Modelingmentioning

confidence: 99%

Model Validation for the Heat Transfer in Gasket Plate Heat Exchangers Working with Vegetable Oils

Neagu

Koncsag

2022

Processes

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“…which straightforwardly also provides the outlet temperatures of the heat exchanger. The pressure drop across the heat exchanger has been evaluated as [38] ∆p…”

Section: Plate Heat Exchangermentioning

confidence: 99%

Techno-Economic Analysis of a Solar Thermal Plant for Large-Scale Water Pasteurization

et al. 2020

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Water pasteurization has the potential to overcome some of the drawbacks of more conventional disinfection techniques such as chlorination, ozonation and ultraviolet radiation treatment. However, the high throughput of community water systems requires energy-intensive processes, and renewable energy sources have the potential to improve the sustainability of water pasteurization plants. In case of water pasteurization by solar thermal treatment, the continuity of operation is limited by the intermittent availability of the solar irradiance. Here we show that this problem can be addressed by a proper design of the plant layout, which includes a thermal energy storage system and an auxiliary gas boiler. Based on a target pasteurization protocol validated by experiments, a complete lumped-component model of the plant is developed and used to determine the operating parameters and size of the components for a given delivery flow rate. Finally, we report an economic analysis of the proposed plant layout, which allows its optimization for different scenarios based on two design variables, namely the solar multiple and the duration of the thermal energy storage. Based on the analyzed cases, it is found that the proposed plant layouts may yield a unit cost of water treatment ranging from ≈32 EUR-cents m−3 to ≈25 EUR-cents m−3.

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“…With reference to the geometrical parameters of Figure 3, the pressure drops for each fluid can be determined by the formula suggested by [15]:…”

Section: Mathematica Model Descriptionmentioning

confidence: 99%

Entropy Generation Minimization for the Design of Plate Heat Exchangers

Bruno¹,

Bevilacqua²,

Ferraro³

et al. 2019

IJES

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Plate heat exchangers are widespread in several fields due to their capability to transfer noticeable thermal powers despite the reduced encumbrance. The main feature concerns the presence of parallel plates where the fluids circulate in alternate manner in counter-current configuration. These devices are highly flexible allowing for the addition or the removal of a certain number of plates in order to vary the exchange surface. The latter often is equipped with corrugation in order to improve the thermal power transfer, however pressure drops can increase significantly. In this paper, a second law analysis was carried out in order to identify an optimal configuration of the heat exchanger that minimizes the entropy generation. The latter is determined by calculating the irreversibilities due to the heat transfer and the pressure drops. Usually, the first can be reduced with the exchange surface growth, but simultaneously the entropy generation due to the pressure drops increases. Therefore, these irreversibilities produce opposed effects and consequently an optimal configuration, that minimizes the total entropy generation, can be found. By means of a parametric study, a quality dimensionless index defined in function of the generated entropies allows for the identification of the optimal features of these heat exchangers.

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Estimation of pressure drop in gasket plate heat exchangers

Cited by 11 publications

References 1 publication

Model Validation for the Heat Transfer in Gasket Plate Heat Exchangers Working with Vegetable Oils

Model Validation for the Heat Transfer in Gasket Plate Heat Exchangers Working with Vegetable Oils

Techno-Economic Analysis of a Solar Thermal Plant for Large-Scale Water Pasteurization

Entropy Generation Minimization for the Design of Plate Heat Exchangers

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