A comparative study on thermo-fluid characteristics of free and wall-bounded cross-flow heat exchangers

Moosavi, Amin; Ljung, Anna‐Lena; Lundström, T. Staffan

doi:10.1016/j.tsep.2023.101746

Cited by 5 publications

(2 citation statements)

References 52 publications

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“…Given the large-scale and transient behavior of battery packages, the integrated simulation of the battery cooling system could be quite challenging, particularly in terms of computing cost. Hence, in this work, we have implemented a simplified modeling approach described by Moosavi et al [15] to efficiently predict the thermal behavior of the battery module in different operating conditions. The simplified modeling approach divides the integrated model into three discrete parts: (1) an analytical model based on the integral transform technique for the prediction of temperature field within the cylindrical battery cells [16],…”

Section: Thermal Model For Battery Modulementioning

confidence: 99%

“…(2) a CFD model to predict heat transfer rate in the periodic flow region [17], and (3) a series of approximate equations to estimate row-to-row thermal evolution along the cooling system, all of which are linked together via the heat transfer coefficient. Basically, the process starts with the thermal evaluation of flow in the periodic flow region using the CFD model.…”

Section: Thermal Model For Battery Modulementioning

confidence: 99%

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Investigating the Potential and Limitations of Cell Spacing Adjustment for Optimized Air-Based Battery Thermal Management Systems

Moosavi,

Ljung,

Lundström

2024

Preprint

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A reliable battery thermal management system plays a crucial role in the safe, efficient, and long-term operation of a high-performance lithium battery system. This study evaluates the temperature rise, pressure drop, capacity loss, and cyclical cost of an air-cooled battery system consisting of 90 cylindrical battery cells placed in a staggered arrangement in the module. The effect of spacing between the adjacent cells and inflow velocity is investigated for the battery system operating at high charge/discharge rates of 3C and 5C. The results demonstrate that the hybrid model, which consists of the battery life model integrated with the simplified modeling approach for the thermal evaluation of battery packs, provides a cost-effective tool for multi-objective analysis and optimization of air-cooled battery packages. The results reveal that the air-based cooling system has the potential to fulfill the safety standards in all studied cases, and employing battery modules with larger cell spacing at a constant inflow velocity may reduce the maximum temperature, pressure drop, and cyclical cost by up to 2.14%, 93.36%, and 35.69%, respectively, while extending the lifespan of the battery system by up to 55.45%. However, it is found that the air-based cooling system approaches its limit of thermal performance at high inflow velocities. A novel index (MCR index) is proposed in this paper to characterize the limitations associated with adjusting cell spacing for air-based battery cooling systems. It is observed that for systems with an MCR index beyond 600, the effect of cell spacing on thermal performance becomes negligible. This can be used as a useful guideline for optimizing air-based battery thermal management systems or integrating them with other cooling methods.

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Section: Thermal Model For Battery Modulementioning

confidence: 99%

Section: Thermal Model For Battery Modulementioning

confidence: 99%

Investigating the Potential and Limitations of Cell Spacing Adjustment for Optimized Air-Based Battery Thermal Management Systems

Moosavi,

Ljung,

Lundström

2024

Preprint

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Heat transfer characteristics and heat conductivity prediction model of waste steel slag–clay backfill material

Xu,

Yao,

Huang

et al. 2023

Thermal Science and Engineering Progress

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Role of physical structure on performance index of crossflow microchannel heat exchanger with regression analysis

Jahan,

Nasrin

2024

Adv. Model. and Simul. in Eng. Sci.

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Microchannel heat exchangers have become the preferred choice in contemporary technologies like electronics, refrigeration, and thermal management systems. Their popularity stems from their compact design and exceptional efficiency, which outperform traditional heat exchangers (HE). Despite ongoing efforts, the optimal microchannels for enhancing heat management, minimizing pressure drop, and boosting overall performance have yet to be identified. This study seeks to deepen our understanding of heat transmission and fluid dynamics within a cross-flow microchannel heat exchanger (CFMCHE). Utilizing numerical modeling, it examines how various physical aspects—such as channel geometry, spacing between channels, the number of channels, and the velocity at the inlet—affect key performance indicators like pressure drop, effectiveness, Nusselt number, and overall efficiency. To enhance the design, we analyze six unique shapes of crossflow microchannel heat exchangers: circular, hexagonal, trapezoidal, square, triangular, and rectangular. We employ the Galerkin-developed weighted residual finite element method to numerically address the governing three-dimensional conjugate partial differential coupled equations. The numerical results for each shape are presented, focusing on the surface temperature, pressure drop, and temperature contours. Additionally, calculations include the efficacy, the heat transfer rate in relation to pumping power, and the overall performance index. The findings reveal that while circular shapes achieve the highest heat transfer rates, they underperform compared to square-shaped CFMCHEs. This underperformance is largely due to the increased pressure drop in circular channels, which also exhibit a 1.03% greater reduction in effectiveness rate than their square-shaped counterparts. Consequently, square-shaped channels, boasting a performance index growth rate of 53.57%, emerge as the most effective design among the six shapes evaluated. Additionally, for the square-shaped CFMCHE, we include residual error plots and present a multiple-variable linear regression equation that boasts a correlation coefficient of 0.8026.

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A comparative study on thermo-fluid characteristics of free and wall-bounded cross-flow heat exchangers

Cited by 5 publications

References 52 publications

Investigating the Potential and Limitations of Cell Spacing Adjustment for Optimized Air-Based Battery Thermal Management Systems

Investigating the Potential and Limitations of Cell Spacing Adjustment for Optimized Air-Based Battery Thermal Management Systems

Heat transfer characteristics and heat conductivity prediction model of waste steel slag–clay backfill material

Role of physical structure on performance index of crossflow microchannel heat exchanger with regression analysis

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