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《热科学学报》2020年第4期目录,Vol29,No.4
Keywords:《Journal of Thermal Science》Contents-July-August 2020
Issue 4, 2020 | PDF
Article
Published: July 5, 2020
Views:81
Experimental Characterization of the Supersonic Transitional Wake Downstream of a Single Roughness Element
Authors: BOTTINI Henny,SARACOGLU Bayindir H,PANIAGUA Guillermo
Institution:Nagoya University
Keywords:supersonic boundary layer, roughness wake, steady measurements, unsteady measurements, heat transfer
doi:https://doi.org/10.1007/s11630-019-1198-1
Issue 4: 1085-1093, 2020 | PDF
Article
Published: July 5, 2020
Views:17
Abstract: An experimental campaign was carried out to investigate the characteristics of the transitional supersonic wake downstream of a single roughness element. Two Mach numbers were tested, 1.6 and 2.3, ...
Molecular Dynamics Simulations of the Effects of Surface Sinusoidal Nanostructures on Nanoscale Liquid Film Phase-Change;正弦形式纳米结构表面对纳米尺度液膜相变影响的分子动力学模拟
Authors: CAO Qun,CUI Zheng
Institution:Shandong University
Keywords:molecular dynamics simulation, sinusoidal surface, phase-change, interfacial thermal resistance, nanoscale
doi:https://doi.org/10.1007/s11630-019-1152-2
Issue 4: 1076-1084, 2020 | PDF
Article
Published: July 5, 2020
Views:18
Abstract: 传热表面上纳米结构的存在可以有效强化微纳尺度的相变传热过程。为了理解纳米结构强化传热的机制,本文通过分子动力学模拟的方法研究了纳米尺度液膜在周期性正弦纳米结构表面的蒸发过程。通过改变描述正弦形状曲线的振幅和周期构造了不同结构的正弦表面。在模拟液膜相变过程中我们发现,所有形式的铜表面上均存在未蒸发区域。此外,我们计算了不同形式表面的界面热阻和固体、液体之间的振动态密度失配度。结果表明,在正弦形...
Operation Optimization of Liquid Cooling Systems in Data Centers by the Heat Current Method and Artificial Neural Network;应用热量流法和人工神经网络的数据中心液冷系统运行优化
Authors: SHAO Wei,CHEN Qun,HE Kelun
Institution:Tsinghua University
Keywords:liquid cooling system, energy conservation, heat current method, global heat transfer constraints, artificial neural network
doi:https://doi.org/10.1007/s11630-020-1283-5
Issue 4: 1063-1075, 2020 | PDF
Article
Published: July 5, 2020
Views:15
Abstract: 液冷系统由于具备更好的冷却能力和更低的能耗逐渐引起广泛关注。为给数据中心的间接液冷系统运行提供一种有效的优化方法,本文首先搭建了液冷系统实验平台并通过热量流法建立系统的整体传热约束。特别指出的是,约束中不同工况下的各换热器热导是通过基于历史数据构建的人工神经网络模型预测的。基于此,结合系统整体的传热和流动约束,以系统总泵功耗最小为目标,应用拉格朗日乘子法构建系统的整体优化模型,借助相应的求解...
Equivalent Cycle and Optimization of Auto-Cascade Absorption Refrigeration Systems;自行复叠吸收式制冷系统的等效循环及优化
Authors: HE Yijian,CHEN Guangming
Institution:Institute of Refrigeration and Cryogenics
Keywords:auto-cascade absorption refrigeration, equivalent cycle, thermodynamic perfect degree, entropy generation, optimizing
doi:https://doi.org/10.1007/s11630-020-1333-z
Issue 4: 1053-1062, 2020 | PDF
Article
Published: July 5, 2020
Views:13
Abstract: 自行复叠吸收式制冷(ACAR)系统是一类利用低品位热实现低温制冷的新循环。本文建立了可逆ACAR系统的等效热力学循环过程,并构建了T-s图。根据热力学第一定律和第二定律,推导得到了可逆ACAR系统性能系数计算公式。然后,构建了不可逆ACAR系统的等效循环。基于热力学过程熵产最小原则,对不可逆ACAR系统进行了优化。得到了自行复叠过程的最优热流分配比,即在冷凝温度与自行复叠温度下冷凝放热过程的...
Performance Analysis and Evaluation of a Supercritical CO2 Rankine Cycle Coupled with an Absorption Refrigeration Cycle;带吸收式制冷循环的超临界CO2朗肯循环性能分析与评估
Authors: CHEN Yi,XU Dongjie,CHEN Zheng
Institution:China Electric Power Planning & Engineering Institute
Keywords:supercritical CO2 cycle, absorption refrigeration cycle, sensible heat source, solar energy, thermodynamic analysis
doi:https://doi.org/10.1007/s11630-020-1166-9
Issue 4: 1036-1052, 2020 | PDF
Article
Published: July 5, 2020
Views:14
Abstract: 在我们的工业生产和生活中存在着大量的显热余热资源,如烟气、工业废热等。充分回收利用这些余热资源对于节能减排具有重要意义。超临界CO2发电技术在该领域具有较好的发展前景。本文提出了一种带吸收式制冷循环的超临界CO2朗肯循环发电系统,该系统由超临界CO2回热循环、单/双效复合LiBr-H2O吸收式制冷循环、包含真空管集热器和储热水箱的太阳能供热子系统等三部分构成。根据系统是否包括太阳能供热子系统...
Modeling and Energy Efficiency Analysis of Thermal Power Plant with High Temperature Thermal Energy Storage (HTTES);高温储热式热电系统建模与能效分析
Authors: ZHANG Hongwei,LIANG Wenbin,LIU Junqing
Institution:National Institute of Clean and Low Carbon Energy
Keywords:thermal power plant, peak shaving, high temperature thermal energy storage, wind power accumulation
doi:https://doi.org/10.1007/s11630-020-1310-6
Issue 4: 1025-1035, 2020 | PDF
Article
Published: July 5, 2020
Views:13
Abstract: 中文导读—本文介绍了一种满足热、电负荷平衡要求的热电厂灵活运行策略。本文主要研究将高温储热装置(HTTES)引入火力发电厂蒸汽-水循环中的可行性,在再热管道的冷(热)段确定合适的HTTES并测试其热效率。采用Thermoflex进行仿真,并在软件平台上实现了400MW亚临界燃煤热电厂模型。仿真结果表明,采用弃风电(谷电)作为HTTES热源,将存储的高温热能释放回汽轮发电机发电是可行的,分析了...
Heat Transfer Enhancement of an Automobile Engine Radiator using ZnO Water Base Nanofluids
Authors: Muhammad QASIM,Muhammad SAJID KAMRAN,Muhammad AMMAR
Institution:University of Engineering and Technology
Keywords:ZnO, nanoparticles, heat transfer enhancement, thermal efficiency, automobile radiator
doi:https://doi.org/10.1007/s11630-020-1263-9
Issue 4: 1010-1024, 2020 | PDF
Article
Published: July 5, 2020
Views:13
Abstract: In this research paper, the forced convective heat transfer enhancement of a Suzuki Mehran (VXR) 2016 radiator (heat exchanger) along with pressure drop and friction factor by utilizing Zinc oxide ...
Experimental Study on Thermal Management of Cylindrical Li-ion Battery with Flexible Microchannel Plates;柔性微通道板内圆柱形锂电池热管理实验研究
Authors: WEI Liting,JIA Li,AN Zhoujian
Institution:Beijing Jiaotong University
Keywords:thermal management, Li-ion battery, flexible microchannels, contact area
doi:https://doi.org/10.1007/s11630-020-1331-1
Issue 4: 1001-1009, 2020 | PDF
Article
Published: July 5, 2020
Views:20
Abstract: 中文导读—本文建立了一种新型的柔性微通道板内液体冷却的圆柱形锂电池热管理系统。实验中柔性微通道板内使用的是制冷剂R141b。通过柔性铝微通道内的R141b的流动沸腾换热带走电池放电产生的热量。本文电池组由五个电池串联组成,研究了不同接触面积和质量流量对电池组的热性能和电化学性能的影响。并且对比了三种不同接触面积的结构与无冷却结构的影响。实验表明,在相同放电速率下,入口质量流量范围在0~10k...
Thermal Analysis and Validation of GF-4 Remote Sensing Camera;GF-4 卫星遥感相机的热分析与验证
Authors: LI Shiqi,WANG Yue,ZHANG Heng
Institution:Huazhong University of Science and Technology
Keywords:thermal control system, geostationary orbit, thermal design, optical remote sensor
doi:https://doi.org/10.1007/s11630-020-1230-5
Issue 4: 992-1000, 2020 | PDF
Article
Published: July 5, 2020
Views:23
Abstract: 中文导读—中国GE-4卫星遥感器搭载了一台空间分辨率为50米可见光/近红外波段和400米中红外波段的卫星相机,它是目前地球静止轨道上分辨率最高的民用卫星遥感器。为了实现卫星相机高分辨率、高灵敏度的需求,卫星遥感器的热设计面临了极大的挑战。本文介绍了GF-4卫星相机的热分析与试验过程,通过计算发现地球静止轨道上工作的卫星遥感器将经历复杂、交变的外热流并面临直射光照的外部环境,采用有限元方法计算...