A review on heat exchanger thermal hydraulic models for cryogenic applications

Pacio, J.; Dorao, Carlos Alberto

doi:10.1016/j.cryogenics.2011.04.005

Cited by 106 publications

(34 citation statements)

References 72 publications

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“…in (hydraulic) heating systems like central [1], district [2] or solar heating systems [3,4], etc.). Many modelling approaches like the ones based on the most commonly used [5] effectiveness-number of transfer units (effectiveness-NTU) method [6,7] and the logarithmic mean temperature difference (LMTD) approach [8] assume energy balance between the two sides (that is between the fluids in the two sides) of a heat exchanger without any heat gain/loss to the environment. In [9], the LMTD is used to model the effect of a heat exchanger coil in a water storage tank.…”

Section: Introductionmentioning

confidence: 99%

“…In [11] and [10], the outlet temperatures of a parallel plate heat exchanger at different operating conditions and the heat transfer rate induced by natural convection over the outer surface of a coiled heat exchanger in a water storage tank are modelled by means of CFD codes. Further simulation software products for plate-fin and coiled-wound heat exchangers are mentioned in [5]. Naturally, real life experiments remain the most direct (but likely the most arduous and expensive) method for revealing heat exchanger processes.…”

Section: Introductionmentioning

confidence: 99%

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Modified effectiveness and linear regression based models for heat exchangers under heat gain/loss to the environment

2018

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Developing mathematical models for describing heat exchanger outlet temperatures is of great importance for the practice, since heat exchangers are unavoidable elements in any applications, where heat transfer is needed between hydraulically separated fluid parts. The conventional, well-tried physically-based E model (standing for the known effectiveness-NTU approach) is recalled. This model assumes energy balance between the two sides of a heat exchanger (without any interaction with the environment). Based on studies in the literature, mathematical models with similar simplicity and usability to that of the E model, but under heat gain/loss to the environment, are still lacking in the field. This work intends to contribute to filling this gap with two proposed models, called ME and LR models. Based on measured data, all three models are accurate enough for general engineering/modelling purposes, nevertheless, the partly physically-based, partly empirical ME model is more precise than the E model if the heat gain/loss to the environment is considerable, and the empirical (black-box type) LR model is more precise than both the E and ME models if the heat gain/loss is not negligible. Furthermore, the outlet temperatures can be explicitly expressed from the simple linear algebraic relations characterizing all models alike.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Modified effectiveness and linear regression based models for heat exchangers under heat gain/loss to the environment

2018

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“…Besides, according to, it is known that a particular problem is the axial conduction effect when the compact microchannel heat exchanger is used in a cryogenic environment. In other words, the unneglectable temperature difference influences the thermal performance of the single heat exchanger significantly.…”

Section: Experimental Contentmentioning

confidence: 99%

Experimental and numerical study on thermal‐hydraulic performance of printed circuit heat exchanger for liquefied gas vaporization

Zhao

Chen

Zhang

et al. 2019

Energy Science & Engineering

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The thermal-hydraulic performance of printed circuit heat exchanger (PCHE) through an experimental vaporization process of supercritical nitrogen was investigated. The inlet temperature of supercritical nitrogen was controlled between 113 K and 129 K, while its pressure was controlled between 4.5 MPa and 6 MPa. The mass of supercritical nitrogen corresponds to the turbulent state on the cold side of PCHE, which was maintained at 299.94 kg/h. A numerical processing of the same supercritical nitrogen flow through a single channel of PCHE cold side was presented. The numerical results were validated by comparison with the experimental data. Both experimental and numerical results showed that the increased inlet supercritical nitrogen pressure improved the heat transfer performance and pressure drop decreased with increasing the pressure at the PCHE cold side. Furthermore, the Fanning friction coefficient (f) and the Nusselt number (Nu) of supercritical nitrogen flow obtained by numerical simulation and empirical correlation were compared. K E Y W O R D Snitrogen gasification, printed circuit heat exchanger, supercritical fluid, thermal-hydraulic performance How to cite this article: Zhao Z, Chen X, Zhang X, Ma X, Yang S. Experimental and numerical study on thermal-hydraulic performance of printed circuit heat exchanger for liquefied gas vaporization. Energy Sci Eng. 2020;8:426-440. https ://doi.

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“…Pu and his co‐workers , have conducted pioneer work of proposing the 1D steady‐state model for thermal design and performance rating of an IFV. Since LNG exchangers are featured by a large temperature difference, the distributed parameter model (DPM) is often recommended . This is performed by dividing each heat‐exchanging section into small elements, applying the energy balance to each section and the whole IFV system.…”

Section: Steady‐state Thermal Designmentioning

confidence: 99%

Design of an Intermediate Fluid Vaporizer for Liquefied Natural Gas

Chen

Fan

2017

Chem Eng & Technol

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The intermediate fluid vaporizer (IFV) owns various advantages over other types of liquefied natural gas (LNG) vaporizers. Research findings related to the design of an IFV, including configurational variations, selection of candidate working fluids, one‐dimensional steady‐state thermal model, computational fluid dynamics (CFD) model for thermal dynamic analysis, and cold energy recovery have been reviewed. Further updates to the current one‐dimensional thermal model are needed. A three‐dimensional unsteady CFD model should be established for the instantaneous flow and heat transfer analysis. Integrating the LNG regasification and cold energy recovery will bring more complexity in process design, optimization, and operation.

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A review on heat exchanger thermal hydraulic models for cryogenic applications

Cited by 106 publications

References 72 publications

Modified effectiveness and linear regression based models for heat exchangers under heat gain/loss to the environment

Modified effectiveness and linear regression based models for heat exchangers under heat gain/loss to the environment

Experimental and numerical study on thermal‐hydraulic performance of printed circuit heat exchanger for liquefied gas vaporization

Design of an Intermediate Fluid Vaporizer for Liquefied Natural Gas

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