西安交通大学人居学院“第三届研究生学术创新论坛”于2021年7月4日在创新港举行，论坛旨在围绕地球环境科学、人居环境、土木工程、建筑学以及相关交叉研究领域进行学术成果演讲与展板交流。团队博士生刘亦琳获得的了口头学术报告类特等奖，博士生马真迪获得了展板类二等奖，硕士生陈曦源，王嘉伟和计瑞阳获得了展板类优秀奖，通过论坛的学术交流，同学们受益颇多，开阔了学术眼界、拓宽了研究思路。

The 3rd Academic Innovation Forum for graduate students was held in iHARBOUR of Xi'an Jiaotong University on July 4, 2021. The doctoral student Liu Yilin won the special prize for oral presentation, and the doctoral student Ma Zhendi won the second prize for poster presentation. The postgraduates, Chen Xiyuan, Wang Jiawei and Ji Ruiyang, won the excellent award for poster presentation.

博士生刘亦琳做了口头学术报告——“水蒸气在中空纤维复合膜内微观迁移机理研究”，研究采用分子模拟对水蒸气在高分子膜内的微观分子动力学特性进行了模拟分析。通过分析水蒸气和氮气在聚合物膜中的溶解-扩散过程发现，溶解性主导了水蒸气在聚合物膜中的迁移，而扩散性是氮气在聚合物膜内迁移的主要机制。

Liu Yilin, a doctoral student, gave an oral presentation on "Study on the micro-migration mechanism of water vapor in the hollow fiber composite membrane". The study adopted the molecular simulation to analyze the molecular dynamics characteristics of water vapor transport in the polymer membrane. By analyzing the adsorption-diffusion process of water vapor and nitrogen in the polymer membrane, it is found that the solubility dominates the migration of water vapor while the diffusivity is the main mechanism of nitrogen migration in the polymer membrane.

博士生马真迪做了关于“地埋换热器长期运行下地热能衰减的综合研究”的展板展示。研究探究了长期间断运行下地埋换热器的性能衰减情况、地温场的周期性变化以及热作用半径随运行时间变化。研究发现含水层和隔水层的瞬态热作用半径在长期运行下均呈现各向异性; 与第1年相比，除了含水层上游方向，其它方向的热作用半径增长了57.8% - 197.7%。

Ma Zhendi, a doctoral student, made a poster presentation on “A comprehensive study on geothermal energy attenuation subject to long-term operation by ground heat exchangers”. This study investigated the attenuation of GHE heat exchange performance, the periodic change of ground temperature, and the transient thermal influence radius during the long-term intermittent operation of a GHE. The results show that the time-dependent thermal influence radii of the aquifuge and aquifer layers exhibit an anisotropic characteristic during the long-term operation. The anisotropic radii at the end of the 8th year are 57.8% - 197.7% larger than those at the end of the 1st year in the aquifuge layer, and in the aquifer layer except the upstream direction.

硕士研究生陈曦源做了关于“高效液冷板设计与优化”的展板展示。本研究设计冷板微通道形式（弯曲波状通道）和流动形式（中间分流），通过数值模拟结果得到优化的流动与换热性能：弯曲波状通道相较于光滑弯曲通道有72%的换热增强，中间分流形式相较于蛇形流动针有更好的均温效果。

Chen Xiyuan, a master student, made a poster presentation on "Design and Optimization of Efficient Liquid Cold-Plate". In this study, the structure of cold-plate microchannel (curve-wavy channel) and flow form (split-flow) were designed. The optimized flow and heat transfer performance was obtained through numerical simulation results. The heat transfer effect of curve-wavy channel enhanced 72% compared with that of the smooth-curve channel, and split-flow performed better in temperature uniform compared with serpentine-flow.

硕士研究生王嘉伟做了关于“中深层地埋套管偏心度对换热性能影响的研究”的展板展示。探究了不同偏心度对地埋套管式换热器换热性能的影响，通过张量分析的方法对双极柱坐标系中的控制方程进行了推导，这对偏心度影响的机理性研究的开展以及编程模拟有着重要作用。

Wang Jiawei, a master student, made a poster presentation on the "Study on the influence of the eccentricity of GHE on the heat transfer performance". The influence of different eccentricities on the heat transfer performance of the coaxial GHE was studied. The governing equation in the bipolar cylindrical coordinate was deduced by tensor analysis method, which plays an important role in the research and programming simulation of the influence of eccentricity. 

硕士生计瑞阳做了关于“相变散热技术与相变传热增强技术研究”的展板展示。研究探究了在当下5G基站散热需求激增的大背景下，利用主动/被动表面改性方法强化相变传热的四种手段，还展示了一种新型结构的3D蒸汽腔散热器，并对散热器的性能特性进行了简单评述。发现该类新型3D蒸汽腔散热器的平均热阻在0.1~0.2 K/W左右，随着输入功率的上升，散热器的热阻逐渐下降，并且推断可能存在该散热器工作的最佳工况点。

Ji Ruiyang, a master student, made a poster presentation on "Research on phase change cooling and heat transfer enhancement technology". The research explored four means of enhancing phase change heat transfer using active/passive surface modification methods in the context of the current surge in heat dissipation demand of 5G base stations were investigated, and a novel structure 3D vapor chamber heat sink was demonstrated and its performance characteristics were briefly reviewed. The average thermal resistance of this novel 3D vapor chamber heat sink is found to be around 0.1~0.2 K/W. The thermal resistance of the heat sink gradually decreases as the input power rises, and it is inferred that there may be an optimal working point for this kind of heat sink.