International Communications in Heat and Mass Transfer最新文献_第3页

Optimization of thermal performance characteristics for 21,700 lithium-ion battery pack utilizing single-phase immersion cooling: A multi-parameter numerical investigation 基于单相浸没冷却的21,700锂离子电池组热性能优化：多参数数值研究

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2026-01-31 DOI: 10.1016/j.icheatmasstransfer.2026.110651

Tai Duc Le, Moo-Yeon Lee

Lithium-ion batteries (LIBs) are the primary energy storage in electric vehicles. Their electrochemical performance, safety margin, and lifetime are highly temperature-dependent, with thermal non-uniformity accelerating aging and increasing the likelihood of thermal runaway. Single-phase immersion cooling (SPIC) has emerged as a promising approach for battery thermal management, owing to its high convective heat transfer capability and reduced thermal resistance. In this study, the thermal-hydraulic performance of a 21,700 LIB battery pack with a 5S7P configuration under SPIC is systematically investigated, considering multiple battery arrangements, inlet-outlet flow configurations, baffle structures, coolant types, and mass flow rates. The novelty of this work lies in the integrated, multi-parameter optimization of SPIC at a realistic and scalable battery pack level, combining battery arrangement, flow routing, baffle design, and coolant selection within a unified electrochemical-thermal framework. Battery parameters for the Newman-Tiedemann-Gu-Kim (NTGK) model are obtained experimentally under various discharge rates and coupled with a three-dimensional thermal model in ANSYS Fluent. The numerical results are validated against experimental data, with a maximum deviation of less than 5%. The optimal configuration, featuring a cross battery arrangement with one inlet on the left and two outlets in the middle and right flow configurations, and a perforated baffle, achieves a lowest maximum temperature (T_max) of 30.05 °C and a temperature difference (ΔT) of 4.34 °C. Among the tested coolants, Pitherm 150B demonstrates superior overall performance, maintaining the battery pack within an optimal operating range with T_max and ΔT at 29.46 °C and 3.83 °C, respectively, at a 2.0C discharge rate. These findings provide practical design guidance for developing efficient, scalable, and energy-efficient SPIC-based battery thermal management systems for electric vehicle and energy storage applications.

锂离子电池（LIBs）是电动汽车的主要储能系统。它们的电化学性能、安全裕度和寿命高度依赖于温度，热不均匀会加速老化，增加热失控的可能性。单相浸没冷却（SPIC）由于其高对流换热能力和降低热阻，已成为电池热管理的一种有前途的方法。在SPIC下，系统研究了5S7P配置21,700 LIB电池组的热工性能，考虑了多种电池布置、进出口流动配置、挡板结构、冷却剂类型和质量流量。这项工作的新颖之处在于在现实和可扩展的电池组水平上对SPIC进行了集成的多参数优化，将电池布置、流动路线、挡板设计和冷却剂选择结合在一个统一的电化学-热框架内。在不同的放电速率下，通过实验得到了Newman-Tiedemann-Gu-Kim （NTGK）模型的电池参数，并与ANSYS Fluent中的三维热模型进行了耦合。数值计算结果与实验数据相吻合，最大偏差小于5%。优化后的配置采用交叉电池布置，左侧有一个入口，中间和右侧有两个出口，并有一个穿孔挡板，最低最高温度（Tmax）为30.05°C，温差（ΔT）为4.34°C。在测试的冷却剂中，Pitherm 150B表现出卓越的整体性能，在2.0C的放电速率下，将电池组的Tmax和ΔT分别维持在29.46°C和3.83°C的最佳工作范围内。这些发现为开发用于电动汽车和储能应用的高效、可扩展和节能的基于spic的电池热管理系统提供了实用的设计指导。

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引用次数: 0

An energy-efficient variable-power laser-assisted machining strategy: A molecular dynamics study of Ni718 alloy 一种节能变功率激光辅助加工策略：Ni718合金的分子动力学研究

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2026-01-31 DOI: 10.1016/j.icheatmasstransfer.2026.110667

Jialei Zhang , Donghan Yang , Ling Li , Yi Liu

Laser-assisted machining (LAM) is an efficient machining technology. However, the conventional constant-power mode often leads to energy waste in the later stages of machining. Thus, this work proposes a variable-power laser-assisted machining (VLAM) method to optimize energy efficiency by adjusting the laser power. Specifically, a high laser power is applied in the initial stage to enhance material softening, while a lower laser power is employed in the later stage to reduce heat dissipation. Molecular dynamics simulations are used to examine the feasibility of this strategy. The simulation results show that compared with the constant-power laser-assisted machining (CLAM), VLAM exhibits improved cutting performance. The cutting force is reduced by 5%, and the material removal rate (MRR) is increased by 2.55%. Consequently, the specific grinding energy (SGE) is improved by 3.82%. Subsurface damage analysis further reveals that VLAM induces a slight crystal structure transformation and shorter dislocation lengths, enhancing the structural stability of the workpiece. To comprehensively evaluate the influence of the laser power ratio (θ) on cutting force, cutting energy, dislocation, and phase transformation, the concept of an optimization factor is introduced. The results indicate that the optimization factor increases initially and subsequently decreases with θ. Therefore, the VLAM strategy should be preceded by physics-based simulations to identify a robust parameter window and improve the reliability of the machining outcome. This work provides theoretical insights and methodological references to advance high-efficiency precision machining technologies.

激光辅助加工是一种高效的加工技术。然而，传统的恒功率模式往往导致加工后期的能量浪费。因此，本工作提出了一种可变功率激光辅助加工（VLAM）方法，通过调节激光功率来优化能量效率。具体而言，在初始阶段使用高激光功率来增强材料的软化，而在后期使用较低的激光功率来减少散热。分子动力学模拟用于验证该策略的可行性。仿真结果表明，与恒功率激光辅助加工（CLAM）相比，VLAM具有更好的切削性能。切削力降低5%，材料去除率（MRR）提高2.55%。比磨削能（SGE）提高3.82%。亚表面损伤分析进一步表明，VLAM诱导了轻微的晶体结构转变和更短的位错长度，提高了工件的结构稳定性。为了综合评价激光功率比（θ）对切削力、切削能、位错和相变的影响，引入了优化因子的概念。结果表明，优化因子随θ的增大先增大后减小。因此，在VLAM策略之前应该进行基于物理的仿真，以确定一个鲁棒的参数窗口并提高加工结果的可靠性。本研究为推进高效精密加工技术提供了理论见解和方法参考。

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引用次数: 0

Energy-efficient frost removal on curved surfaces through intermittent ultrasonic vibration 利用间歇超声振动对曲面进行节能除霜

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2026-01-31 DOI: 10.1016/j.icheatmasstransfer.2026.110669

Yuhe Shang , Zihao Fang , Weiyan Lu , Dong Li

Frost formation on curved surfaces like heat exchanger tubes severely degrades performance in energy systems. Conventional thermal de-icing methods suffer from high energy consumption. Ultrasonic de-icing offers a low-energy alternative, yet existing studies focus primarily on flat geometries. This work investigates ultrasonic defrosting dynamics on round tubes via visualized experiments. Experiments under continuous and intermittent vibrations reveal that intermittent operation induces synergistic frost removal via shear stress, thermal effects (significantly higher surface temperature rise than continuous mode) and cavitation-driven atomization, achieving 96%–98% efficiency. Power increase accelerates ice fracture/melting in continuous vibration. During cyclic frosting, continuous vibration triggers unique ice-grain migration phenomena, while optimized intermittent vibration efficiently removes the denser re-frosted ice without migration. Optimized intermittent vibration outperforms continuous mode, enhancing efficiency while reducing energy consumption by 21%. This demonstrates intermittent ultrasound as a robust and energy-efficient solution for defrosting curved surfaces, and offering significant potential to improve sustainability and operational efficiency in refrigeration and renewable energy systems.

在热交换器管等曲面上结霜会严重降低能源系统的性能。传统的热除冰方法能耗高。超声波除冰提供了一种低能耗的替代方案，但现有的研究主要集中在平面几何上。本文通过可视化实验研究了圆管超声除霜动力学。连续振动和间歇振动下的实验表明，间歇操作通过剪切应力、热效应（表面温升明显高于连续模式）和空化驱动的雾化协同除霜，效率可达96%-98%。在连续振动中，功率的增加加速了冰的破裂/融化。在循环结霜过程中，连续振动触发独特的冰粒迁移现象，而优化后的间歇振动能有效去除密度更大的无迁移的再结霜冰。优化的间歇振动优于连续振动模式，提高了效率，同时降低了21%的能耗。这表明间歇性超声是一种强大而节能的曲面除霜解决方案，并为提高制冷和可再生能源系统的可持续性和运行效率提供了巨大的潜力。

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引用次数: 0

Thermally induced thermophoresis and Brownian motion in bio-convection with motile organisms over a progressively curved surface 在一个逐渐弯曲的表面上运动的生物对流中的热诱导热泳动和布朗运动

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2026-01-31 DOI: 10.1016/j.icheatmasstransfer.2026.110631

Ambar Shahzadi , Muhammad Armghan Shabir , Musharafa Saleem

Bio-convection is a significant phenomenon that can be applied in the environment in many ways that can be considered beneficial, such as pharmaceuticals, the production of biological polymers, and other process types that are environmentally friendly. The technology of stretching surface is also extensively used in such industries as plastic film formation and the production of polymer sheets, where the speed of the heat transfer at the surface of the stretching performs a decisive role in the quality of the final product. The current investigation explores the evolution of viscous fluid flow over a curved surface that elongates progressively with time. The vertical progressively stretched surface is maintained with the influences of magnetohydrodynamic (MHD), bio-convection, and Buongiorno nanofluid model. The similarity transformations are utilized for the transformation of nonlinear partial differential equations (PDEs) to a set of ordinary differential equations (ODEs), which is then solved by means of BVP4C technique. It is evident from the graphical interpretation that the curvature parameter plays a crucial role in modulating the boundary layer characteristics. A progressive rise in

k

compresses the momentum, energy, and motile microorganism boundary layers. Nevertheless, the nanoparticle concentration profile behaves differently, showing a diminishing tendency at first and then attaining a strengthening behavior with further enhancement in curvature. The thermophoretic and Brownian motion parameters influence the thickness of the boundary layer of temperature, concentration, and microorganism profiles, typically, enhancing it. Nevertheless, the concentration profile decreases the thickness of the boundary layer, particularly because of the thermophoretic parameter. When the Prandtl number increases, the temperature profile decreases and the concentration profile has a non-monotonic behavior, i.e., it decreases first and then increases with

η

. Conversely, an increase in Schmidt number promotes the temperature profile, but the profile of concentration again exhibits a comparable twisted nature, falling at the beginning, and increasing subsequently in response to some fluctuation of η.

生物对流是一种重要的现象，可以以许多被认为是有益的方式应用于环境中，例如制药、生物聚合物的生产和其他对环境友好的工艺类型。表面拉伸技术还广泛应用于塑料薄膜形成和聚合物片材生产等行业，其中拉伸表面的传热速度对最终产品的质量起着决定性的作用。目前的研究探讨了粘性流体流动的演变，在一个弯曲的表面，随着时间的推移逐渐延长。在磁流体动力学（MHD）、生物对流和Buongiorno纳米流体模型的影响下，保持了垂直逐渐拉伸的表面。利用相似变换将非线性偏微分方程（PDEs）转化为一组常微分方程（ODEs），然后利用BVP4C技术求解。从图形解释可以明显看出，曲率参数在调节边界层特性方面起着至关重要的作用。k的逐渐升高压缩了动量、能量和可移动的微生物边界层。然而，纳米颗粒浓度曲线表现出不同的特征，首先表现出减小的趋势，然后随着曲率的进一步增强而达到增强的趋势。热泳动和布朗运动参数影响温度、浓度和微生物剖面的边界层厚度，通常会增强边界层厚度。然而，浓度分布减小了边界层的厚度，特别是由于热泳参数的影响。当普朗特数增大时，温度分布减小，浓度分布随η的增大呈现先减小后增大的非单调特征。相反，施密特数的增加促进了温度分布，但浓度分布再次表现出类似的扭曲性质，开始时下降，随后随着η的波动而增加。

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引用次数: 0

Thermal-magnetic effects in the SiC crystal growth by top-seeded solution growth method with induction heating 感应加热顶种溶液生长SiC晶体中的热磁效应

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2026-01-30 DOI: 10.1016/j.icheatmasstransfer.2026.110624

Yao Yang , Zaoyang Li , Junlan Wang , ChongChong Qi , Guanghui Wu , Quanzhi Wang , Lijun Liu , Tao Wang , Yiqi Peng , Dongli Hu

Induction heating is commonly used in the top-seeded solution growth (TSSG) of SiC crystals to provide heating power and at the same time generates Lorentz force in the solution, namely the thermal effect and the magnetic effect. Therefore, studying the thermal-magnetic effects is critical to minimize the system power consumption and improve the crystal growth simultaneously. In this study, a global numerical model was established to calculate the induction heating, heat transfer, solution flow and carbon transport in the SiC crystal growth by TSSG method. The combined thermal-magnetic effects were systematically studied to find out optimal heating parameters that can simultaneously utilize both effects. The results indicate that excessively high or low frequencies increase the total heating power consumption and reduce the induction heating efficiency. The optimal frequency range is 1–2 kHz in this study, for which the minimum total power consumption is 34.4 kW and the maximum heating efficiency is 82.0%. The Lorentz force in the solution changes significantly with the increase of frequency, and thus influences the crystal growth parameters. It's found that the growth rate is relatively high and uniform at 1–2 kHz. Therefore, the thermal-magnetic effects can be utilized simultaneously to optimize the SiC crystal growth.

在SiC晶体的顶种溶液生长（TSSG）中，通常采用感应加热来提供加热功率，同时在溶液中产生洛伦兹力，即热效应和磁效应。因此，研究热磁效应对于降低系统功耗，同时提高晶体生长速度至关重要。本研究建立了一个全局数值模型，通过TSSG法计算了SiC晶体生长过程中的感应加热、传热、溶液流动和碳输运过程。系统地研究了热磁复合效应，以寻找同时利用这两种效应的最佳加热参数。结果表明，过高或过低的频率会增加加热总功耗，降低感应加热效率。本研究的最佳频率范围为1 ~ 2 kHz，在此频率范围内，最小总功耗为34.4 kW，最大加热效率为82.0%。溶液中的洛伦兹力随频率的增加而发生显著变化，从而影响晶体的生长参数。在1 ~ 2 kHz时，生长速率较高且均匀。因此，可以同时利用热磁效应来优化SiC晶体的生长。

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引用次数: 0

Field synergy enhancement characteristics of heat transfer for rectangular turbulators on a three-fluid heat exchanger 三流体换热器上矩形紊流器传热的场协同增强特性

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2026-01-30 DOI: 10.1016/j.icheatmasstransfer.2026.110654

Jun Zhong , Yunfeng Wang , Sheng Tang , Ming Li , Gang Pei , Jiangtao Rong , Congyan Xu , Lifu Kang , Jianhuan Deng , Shiji Shan , Lu Zhou

In photovoltaic ice-storage cold warehouses, a three-fluid heat exchanger allows for concurrent heat transfer among the air, refrigerant, and water, thus reducing equipment costs and simplifying the system. However, the adverse heat conduction from the water to the refrigerant through the fins and the high thermal resistance on the air side greatly reduce the overall heat transfer performance. To improve the cooling performance, the thermal enhancement mechanism of rectangular flow-disturbing slits within a three-fluid heat exchanger is investigated. The reliability and accuracy of the numerical model are validated under three cooling modes. Based on the field synergy theory, the heat transfer and pressure drop performance of four types of fins are evaluated. The results indicate that with air inlet velocities from 2 to 6 m/s, the slit-only type 2 fin achieves the highest heat transfer rate and the lowest pressure drop among the three slit fin types. The slit-only fin achieves the most significant flow and heat transfer synergy, with the smallest synergy angle α. Specifically, with merely a 5.0–5.5% increase in the pressure drop, the heat transfer rate increases by 20.0–25.5%. The slit-only fin enables the most significant heat transfer field synergy enhancement and significantly improves cold energy management for photovoltaic cold warehouses with a cold storage unit.

在光伏蓄冰冷库中，三流体热交换器允许空气、制冷剂和水之间同时传热，从而降低设备成本并简化系统。然而，水通过翅片向制冷剂的不良热传导和空气侧的高热阻大大降低了整体传热性能。为了提高三流体换热器的冷却性能，研究了矩形扰流狭缝的增热机理。在三种冷却方式下验证了数值模型的可靠性和准确性。基于场协同理论，对四种翅片的传热和压降性能进行了评价。结果表明：当进气速度为2 ~ 6 m/s时，2型狭缝翅片传热速率最高，压降最小；狭缝翅片的流动和换热协同作用最显著，协同角α最小。具体来说，当压降增加5.0-5.5%时，换热率增加20.0-25.5%。对于带冷库单元的光伏冷库，单缝散热片能够最大程度地增强传热场协同效应，显著改善冷能管理。

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引用次数: 0

Bio-inspired heat exchanger design derived from morphology of yellowfin tuna gill filaments 生物热交换器设计源自黄鳍金枪鱼鳃丝的形态

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2026-01-30 DOI: 10.1016/j.icheatmasstransfer.2026.110603

Junjie Chen , Yan Shi

The pursuit of energy-efficient thermal management systems is a paramount challenge in modern engineering. Inspired by the exceptionally efficient respiratory system of the yellowfin tuna (Thunnus albacares), this study proposes a novel biomimetic heat exchanger design based on the microstructure of its gill filaments. Through morphological analysis of tuna gill specimens, key bio-inspired features—including the leading filament edge (LFE), trailing filament edge (TFE), and lamellar fusion (LF)—were identified and translated into an engineering model. A three-dimensional, steady-state computational fluid dynamics (CFD) model was developed and validated against experimental data to investigate the thermal-hydraulic performance. Parametric studies revealed that relocating the biomimetic LFE and TFE structures externally, while omitting the non-participatory LF and gill ray (GR) structures, effectively reduces flow resistance while maintaining the convective heat transfer coefficient, resulting in a 30.3% enhancement in the performance evaluation criterion (EEC). The results demonstrate that the bio-inspired optimization framework, which focuses on minimizing pressure loss rather than solely enhancing heat transfer, offers a promising paradigm for developing compact, low-flow-resistance heat exchangers for advanced thermal management applications.

追求高效节能的热管理系统是现代工程中的一个重大挑战。受黄鳍金枪鱼（Thunnus albacares）异常高效的呼吸系统的启发，本研究提出了一种基于其鳃丝微观结构的新型仿生热交换器设计。通过对金枪鱼鳃标本的形态学分析，确定了主要的生物启发特征，包括前丝边缘（LFE）、后丝边缘（TFE）和板层融合（LF），并将其转化为工程模型。建立了三维稳态计算流体动力学（CFD）模型，并根据实验数据进行了验证。参数化研究表明，将仿生LFE和TFE结构移至外部，而忽略非参与式LFE和鳃射线（GR）结构，可以有效降低流动阻力，同时保持对流换热系数，使性能评价标准（EEC）提高30.3%。结果表明，以生物为灵感的优化框架，其重点是最大限度地减少压力损失，而不仅仅是增强传热，为开发用于高级热管理应用的紧凑型低流阻热交换器提供了一个有前途的范例。

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引用次数: 0

Machine learning-driven hotspot thermal management in chip heat sinks through topology optimization 基于拓扑优化的芯片散热器中机器学习驱动的热点热管理

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2026-01-30 DOI: 10.1016/j.icheatmasstransfer.2026.110632

Chenzhe Li , Ting Fu , Jiangbo Wang , Feng Zhang , Jianqiang Dou

Topology optimization has shown promising potential in enhancing heat transfer performance of channel structures in chip heat sinks. However, existing research struggles to effectively solve the complex thermal behavior arising from multiple random hotspots within chips. Thus, this study proposes a machine learning-driven hotspot thermal management method based on topology optimization, which balances computational efficiency with thermal management performance. Clustering results from machine learning serve as a prerequisite for this topology optimization, used as heat source boundary conditions to derive four optimized structures. Meanwhile, three-dimensional numerical simulations are conducted to validate the heat transfer performance of each structure. The results demonstrate that obvious improvements in overall heat transfer performance were obtained for these topology optimization structures with hotspot sources under the condition of all heat source boundary. Among them, the machine learning-driven topology optimization structure achieved optimal convective heat transfer efficiency. At the same time, it is controllable for pressure drop under directional cooling of hotspots, which outperforms other models in both Nusselt number and the overall heat transfer efficiency index, with a maximum comprehensive improvement of up to 52%. These results confirm that machine learning-driven topology optimization offers a feasible and efficient design strategy for chip hotspot thermal management.

拓扑优化在提高芯片散热器通道结构的传热性能方面显示出良好的潜力。然而，现有的研究很难有效地解决芯片内多个随机热点引起的复杂热行为。因此，本研究提出了一种基于拓扑优化的机器学习驱动的热点热管理方法，以平衡计算效率和热管理性能。机器学习的聚类结果作为拓扑优化的先决条件，作为热源边界条件，导出了四个优化结构。同时进行了三维数值模拟，验证了各结构的传热性能。结果表明，在全热源边界条件下，带热点的拓扑优化结构整体换热性能得到明显改善。其中，机器学习驱动的拓扑优化结构实现了最优的对流换热效率。同时，热点定向冷却压降可控，在努塞尔数和整体换热效率指标上均优于其他模型，最大综合提升可达52%。这些结果证实了机器学习驱动的拓扑优化为芯片热点热管理提供了一种可行且高效的设计策略。

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引用次数: 0

Heat transfer enhancing mechanism and cooling performance in the novel microchannel contact mechanical seals with cavities and ribs 带腔肋的新型微通道接触式机械密封的传热强化机理及冷却性能

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2026-01-30 DOI: 10.1016/j.icheatmasstransfer.2026.110652

Xuezhong Ma , Qingxiang Xie

To solve the overheating issue of end faces in contact mechanical seals under high-speed conditions, a novel microchannel mechanical seal structure with cavities and ribs is proposed. A three-dimensional turbulent conjugate heat transfer model is developed by Computational Fluid Dynamics (CFD) to investigate the feasibility of the novel seal and cooling method. The results confirm that the rhombus rib-rectangular cavity (MC-RH) microchannel is the optimum heat transfer structure, generates a temperature drop of 85.88 K and the reduction rate is up to 34.7% at n = 10,000 r/min. The heat transfer enhancing mechanism and cooling principle are revealed. Due to the high-speed rotation of rotor, the mainstream low-temperature fluid impinges on the windward side of rhombus rib and subsequently splits into two streams. The inclined geometry of ribs directs the flow towards the sidewalls of rectangular cavity, enhancing the thermal mixing effect between the mainstream low-temperature fluid and the near-wall heated fluid. This process disrupts the thicker thermal boundary layer, thereby increasing the local Nusselt number and significantly reducing the sealing face temperature. Parametric analyses of structure and operating conditions further confirm that the MC-RH not only significantly enhances heat transfer but also exhibits superior operational adaptability. Additionally, properly selected rib width, rib length, and microchannel depth are identified as key contributors to the excellent cooling performance.

为解决接触式机械密封在高速工况下端面过热问题，提出了一种带腔肋的微通道机械密封结构。利用计算流体力学（CFD）建立了三维湍流共轭传热模型，研究了新型密封冷却方法的可行性。结果表明，菱形肋-矩形腔（MC-RH）微通道是最优的传热结构，在n = 10,000 r/min时，温度下降85.88 K，还原率达34.7%。揭示了强化传热机理和冷却原理。由于转子的高速旋转，主流低温流体撞击在菱形肋的迎风侧，继而分裂成两股流。肋部倾斜的几何形状将流动引向矩形腔体的侧壁，增强了主流低温流体与近壁受热流体之间的热混合效果。这一过程破坏了较厚的热边界层，从而增加了局部努塞尔数，显著降低了密封面温度。结构和运行条件的参数分析进一步证实了MC-RH不仅能显著提高换热性能，而且具有良好的运行适应性。此外，正确选择肋宽、肋长和微通道深度被认为是卓越冷却性能的关键因素。

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引用次数: 0

Structural optimization of a dual-purpose evaporation/gas-cooling cabin-side microchannel heat exchanger for a novel CO2 automotive air-conditioning system 新型CO2汽车空调系统蒸发/气冷两用舱内微通道换热器的结构优化

IF 6.4 2区工程技术 Q1 MECHANICS

International Communications in Heat and Mass Transfer

Pub Date : 2026-01-30 DOI: 10.1016/j.icheatmasstransfer.2026.110598

Jie Feng, Weidong Wu, Yicheng Huang, Jiaqi Wei

As a critical element in automotive air-conditioning systems, the performance of the heat exchanger strongly influences the overall system. This study focuses on a dual-purpose indoor microchannel heat exchanger (DPIHE) that operates as both gas cooler and evaporator in a novel CO₂ automotive air-conditioning system featuring single-stage compression with secondary throttling. Its structure was optimized using Dymola - based simulations, and the influences of different structural parameters and inlet conditions on the DPIHE performance were examined. Simulation results indicated that, for fixed inlet conditions, decreasing the number of flat tubes in the first pass markedly lowers the refrigerant-side pressure drop in both heat-pump and cooling modes, while only slightly influencing the heat transfer performance. Conversely, increasing the number of passes enhances the heating capacity in heat-pump mode, but it also leads to a substantial rise in pressure loss in both operating modes. Relative to the baseline design, the optimized DPIHE in heat-pump mode delivers a 6.9% increase in heating capacity, accompanied by a 22.1% reduction in refrigerant-side pressure drop. In air-conditioning mode, the heat transfer capacity almost remained unchanged, whereas the refrigerant-side pressure drop decreased by 68.2%. This study proposes a practical structural optimization route and offers design guidance for improving the capacity and performance of heat exchangers in CO₂ automotive air-conditioning systems.

作为汽车空调系统的关键部件，换热器的性能对整个系统的影响很大。本研究的重点是一种双重用途的室内微通道热交换器（DPIHE），它在一种新型的二氧化碳汽车空调系统中既可以作为气体冷却器又可以作为蒸发器，该系统具有单级压缩和二次节流功能。利用Dymola仿真软件对其结构进行了优化，考察了不同结构参数和进口条件对DPIHE性能的影响。模拟结果表明，在固定进口条件下，减少一段平管的数量可以显著降低热泵和冷却两种方式的制冷剂侧压降，而对换热性能的影响很小。相反，在热泵模式下，增加通道数可以提高供热能力，但也会导致两种运行模式下压力损失的大幅增加。与基线设计相比，热泵模式下优化后的DPIHE的供热能力提高了6.9%，制冷剂侧压降降低了22.1%。在空调模式下，换热能力基本保持不变，而制冷剂侧压降下降了68.2%。本研究提出了一种实用的结构优化路线，为提高CO2汽车空调系统换热器的容量和性能提供了设计指导。

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