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非共沸工质池沸腾传热关联式分析

工程热物理学报 2022年第6期43卷 1604-1608页

作者：林龙生李婧文杨震段远源清华大学热科学与动力工程教育部重点实验室北京100084

非共沸工质相变传热对诸多热力系统均至关重要,而池沸腾传热是深入认识非共沸工质相变传热的基础。目前已有一些针对非共沸工质池沸腾传热的研究工作,提出了传热计算的关联式。本文以此为背景,开展了对非共沸工质池沸腾传热关联式的分析... 详细信息

非共沸工质相变传热对诸多热力系统均至关重要,而池沸腾传热是深入认识非共沸工质相变传热的基础。目前已有一些针对非共沸工质池沸腾传热的研究工作,提出了传热计算的关联式。本文以此为背景,开展了对非共沸工质池沸腾传热关联式的分析,利用文献中可靠的非共沸工质池沸腾传热实验数据,对现有的一些传热关联式进行对比分析。结果表明,所考察的非共沸工质池沸腾的传热关联式准确度较低,不同组分配比的预测结果差异较大,需要对关联式中的传质影响作用展开进一步的研究。

关键词：非共沸工质池沸腾传热关联式

Assessing the yield difference of double-cropping rice in South China driven by radiation use efficiency

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Journal of Integrative Agriculture 2024年第11期23卷 3692-3705页

作者： Jian Lu Sicheng Deng Muhammad Imran Jingyin Xie yuanyuan Li Jianying Qi Shenggang Pan Xiangru Tang Meiyang duan State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources/College of Agriculture South China Agricultural University Scientific Observing and Experimental Station of Crop Cultivation in South China Ministry of Agriculture and Rural Affairs Guangzhou Key Laboratory for Science and Technology of Fragrant Rice

Double-cropping rice in South China continues to break the total yield record,but the yield potential of singlecropping rice is not being *** use efficiency （RUE） has been singled out as an important determinant of grain yield in many cereal ***,there is no information on whether the yield gaps in doublecropping rice involve differences in *** experiments were performed over two years to evaluate the effects of intercepted radiation （IP） and RUE on the above-ground biomass production,crop growth rate （CGR）,and harvest index （HI）,in four representative rice varieties,i.e.,Xiangyaxiangzhan （XYXZ）,Meixiangzhan 2 （MXZ2）,Nanjingxiangzhan （NJXZ）,and Ruanhuayoujinsi （RHYJS）,during the early and late seasons of rice cultivation in South *** results revealed that grain yield in the early season was 8.2%higher than in the late *** yield advantage in the early season was primarily due to higher spikelets per panicle and above-ground biomass resulting from a higher *** spikelets per panicle in the early season were 6.5,8.3,6.9,and 8.5%higher in XYXZ,MXZ2,NJXZ,and RHYJS,respectively,than in the late *** higher early season grain yield was more closely related to RUE in the middle tillering stage （R2=0.34）,panicle initiation （R2=0.16）,and maturation stage（R2=0.28）,and the intercepted photosynthetically active radiation （IPAR） in the maturation stage （R2=0.28）,while the late season grain yield was more dependent on IPAR in the middle tillering stage （R2=0.31） and IPAR at panicle initiation （R2=0.23）.The results of this study conclusively show that higher RUE contributes to the yield progress of early season rice,while the yield improvement of late season rice is attributed to higher radiation during the early reproductive *** allocating the RUE of double-cropping rice with high RUE varieties or adjustments of the sowing period merits further study.

关键词： grain yield radiation use efficiency double-cropping rice

CFTR is a negative regulator ofγδT cell IFN-γproduction and antitumor immunity

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Cellular & Molecular Immunology 2021年第8期18卷 1934-1944页

作者： yuanyuan duan Guangqiang Li Miaomiao Xu Xiaofei Qi Mingxia Deng Xuejia Lin Zhiwei Lei Yi Hu Zhenghu Jia Quanli Yang Guangchao Cao Zonghua Liu Qiong Wen Zhenhua Li Jie Tang Wei Kevin Zhang Pingbo Huang Limin Zheng Richard A.Flavell Jianlei Hao Zhinan Yin Zhuhai Precision Medical Center Zhuhai People’s Hospital(Zhuhai Hospital Affiliated with Jinan University)Jinan UniversityZhuhai519000GuangdongChina The Biomedical Translational Research Institute Faculty of Medical ScienceJinan UniversityGuangzhou510632GuangdongChina Department of Physiology School of Basic Medical SciencesSouthern Medical UniversityGuangzhou510515GuangdongChina The First Affiliated Hospital Jinan UniversityGuangzhou510632China School of Pharmaceutical Sciences South-Central University for NationalitiesWuhan430074HubeiChina Division of Life Science Hong Kong University of Science and Technology(HKUST)Hong KongChina State Key Laboratory of Oncology in Southern China Collaborative Innovation Center for Cancer MedicineSun Yat-sen University Cancer CenterGuangzhou510060China Department of Immunobiology School of MedicineYale UniversityNew HavenCT06520USA

CFTR,a chloride channel and ion channel regulator studied mostly in epithelial cells,has been reported to participate in immune regulation and likely affect the risk of cancer ***,little is known about the effects of CFTR on the differentiation and function ofγδT *** this study,we observed that CFTR was functionally expressed on the cell surface ofγδT *** deletion and pharmacological inhibition of CFTR both increased IFN-γrelease by peripheralγδT cells and potentiated the cytolytic activity of these cells against tumor cells both in vitro and in ***,the molecular mechanisms underlying the regulation ofγδT cell IFN-γproduction by CFTR were either TCR dependent or related to Ca^(2+)*** was recruited to TCR immunological synapses and attenuated Lck-P38 MAPK-c-Jun *** addition,CFTR was found to modulate TCR-induced Ca^(2+)influx and membrane potential(Vm)-induced Ca^(2+)influx and subsequently regulate the calcineurin-NFATc1 signaling pathway inγδT ***,CFTR serves as a negative regulator of IFN-γproduction inγδT cells and the function of these cells in antitumor *** investigation suggests that modification of the CFTR activity ofγδT cells may be a potential immunotherapeutic strategy for cancer.

关键词： CFTR γδT cells TCR Membrane potential Antitumor immunity

Dynamics of Spreading of Liquid on Solid Surface

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Chinese Journal of Chemical Engineering 2007年第5期15卷 730-737页

作者：王晓东彭晓峰段远源王补宣 Department of Thermal Engineering School of Mechanical Engineering University of Science and Technology BDeijing Beijing 100083 China Department of Thermal Engineering Tsinghua University Beijing 100084 China

Based on assuming that there is the precursor film in the front of the apparent contact line （ACL）, a model was proposed to understand the dynamic wetting process and associated dynamic contact angle. The present model indicated that a new dimensionless characteristic parameter, 2, attects the dynamic wetting process and associated dynamic contact angle as well. However, the previous model suggested that the dynamic contact angle is dependent＇on the capillary number and static contact angle only. An experimental investigation was conducted to measure the dynamic wetting behavior of silicon oil moving over glass, aluminum and stainless steel surfaces. It concluded that when the value of 2 was selected as 0.07, 0.16 and 0.35 for glass, aluminum and stainless steel, respectively, the experimental results were in good accordance with the prediction of the model. Furthermore, the comparison of the model with Strom＇s experimental data showed that 2 is independent on the species of liquids. Apparently, 2 should be interpreted as the effect of the solid surface properties on the dynamic wetting ***, it is found in the present experiment that the Hoffman-Voinov-Tanner law, which is valid at very low capillary number （Ca 〈〈 1 or 80〈 10°） recommend by Cazabat, still holds for higher contact angles, even up to 70°-80°. This is explained by （he present model very well.

关键词： dynamic wetting dynamic contact angle stress singularity precursor film slip

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HFC-227ea的维里系数研究

工程热物理学报 2000年第6期21卷 673-676页

作者：雷霞段远源史琳朱明善韩礼钟北京联合大学应用技术学院北京100054 清华大学热能工程系北京100084

ＨＦＣ－２２７ｅａ是一种有希望的新环保制冷剂，特别是作为混合物中的一种组元用于Ｒ２２和Ｒ５０２的替代，但其热物性数据十分有限。本文使用膨胀定容法高精度地测量了ＨＦＣ－２２７ｅａ的气相ＰＶＴ性质，沿定温线外推确定了其第... 详细信息

ＨＦＣ－２２７ｅａ是一种有希望的新环保制冷剂，特别是作为混合物中的一种组元用于Ｒ２２和Ｒ５０２的替代，但其热物性数据十分有限。本文使用膨胀定容法高精度地测量了ＨＦＣ－２２７ｅａ的气相ＰＶＴ性质，沿定温线外推确定了其第二和第三维里系数，并与文献值进行了比较；使用截断维里方程，根据本文所确定的维里系数，可以高精度地再现ＨＦＣ－２２７ｅａ的气相区热力性质。

关键词：维里系数 HFC-227ea 制冷剂环保

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含HFC混合物的气液相平衡计算模型评价

清华大学学报（自然科学版） 2008年第11期48卷 1940-1944页

作者：方锦侯树鑫段远源宋艺新清华大学热科学与动力工程教育部重点实验室北京100084

含氢氟烃(HFC)混合物是一类很有前景的替代工质,其气液相平衡性质的准确描述非常重要。该文对23种有代表性的含HFC二元和4种三元混合工质,采用PR状态方程结合vdW混合规则及其改进形式,以及两种GE-EoS型混合规则进行了相平衡性质研究,详... 详细信息

含氢氟烃(HFC)混合物是一类很有前景的替代工质,其气液相平衡性质的准确描述非常重要。该文对23种有代表性的含HFC二元和4种三元混合工质,采用PR状态方程结合vdW混合规则及其改进形式,以及两种GE-EoS型混合规则进行了相平衡性质研究,详细分析了各模型对二元体系,以及应用于三元体系相平衡性质预测时的适用性。结果表明:简单的vdW混合规则对多种二元体系的计算精度较低,而SV、MHV1、WS混合规则均可准确再现各二元体系的相平衡性质。vdW、MHV1、WS混合规则结合优化得到的二元交互作用参数可以较好地用于文中三元体系的预测,SV混合规则对三元体系的适用性不佳。

关键词：混合工质气液相平衡混合规则

超临界二氧化碳布雷顿循环塔式光热系统及光伏-光热混合系统运行性能分析

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热力发电 2020年第10期49卷 93-100页

作者：杨竞择杨震段远源清华大学热科学与动力工程教育部重点实验室北京100084 清华大学二氧化碳资源化利用与减排技术北京市重点实验室北京100084

本文对超临界二氧化碳(S-CO2)布雷顿循环塔式光热系统及光伏-光热混合系统在典型天气下的运行性能进行了研究。探究光热电站通过灵活调控出力,从而辅助间歇性出力的光伏电站发电并网的能力;分析光伏电站的接入对光热电站运行性能的影响... 详细信息

本文对超临界二氧化碳(S-CO2)布雷顿循环塔式光热系统及光伏-光热混合系统在典型天气下的运行性能进行了研究。探究光热电站通过灵活调控出力,从而辅助间歇性出力的光伏电站发电并网的能力;分析光伏电站的接入对光热电站运行性能的影响;对比S-CO2布雷顿再压缩和部分冷却循环所组成的光热电站在不同运行场景下的热力性能。研究结果表明:光热电站可与光伏电站良好地配合,实现混合电站高效发电并网;光伏电站的接入会导致光热电站的运行效率降低,如晴天时,为辅助光伏电站并网,再压缩循环光热电站的运行效率由20.23%降至18.34%;在光热电站独立发电的运行场景下,再压缩循环光热电站性能更优,而在混合电站联合发电的运行场景下,部分冷却循环光热电站性能更优。

关键词：超临界二氧化碳塔式光热系统光伏-光热混合系统再压缩循环部分冷却循环热效率

10MWth高硫石油焦化学链气化制合成气耦合硫磺回收新系统模拟研究

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化工学报 2019年第6期70卷 2279-2288,F0002页

作者：王璐璐宋涛张将段媛媛沈来宏能源热转换及其过程测控教育部重点实验室东南大学能源与环境学院江苏南京210096 南京师范大学能源与机械工程学院江苏南京210042

基于化学链气化技术依靠气固反应定向调控气化产物中H2S和SO2摩尔比为2的优势,将化学链气化与Claus工艺中的催化转化单元相结合,提出了高硫石油焦化学链气化制合成气和回收硫磺的新系统。针对系统核心单元,即化学链气化过程,基于Aspen P... 详细信息

基于化学链气化技术依靠气固反应定向调控气化产物中H2S和SO2摩尔比为2的优势,将化学链气化与Claus工艺中的催化转化单元相结合,提出了高硫石油焦化学链气化制合成气和回收硫磺的新系统。针对系统核心单元,即化学链气化过程,基于Aspen Plus,开展热输入10 MWth的高硫石油焦化学链气化过程模拟,以赤铁矿石为载氧体,水蒸气为气化介质,重点考察了氧碳比、气化温度对化学链气化过程及硫转化过程的影响。结果发现,氧碳比的增大导致合成气产率显著降低,但系统从需要外部提供能量逐渐转变为对外部放热,在氧碳比0.8669~0.9535区间内,系统可以达到热量自平衡。同时,气化温度的提高对合成气产率是有利的,在975℃时达到2.15 m^3/kg,主要是由于CO体积分数随气化温度增加而增加。氧碳比和气化温度的提高都会导致H2S浓度的降低和SO2浓度的提高。并且研究了当H2S和SO2摩尔比为2的最佳工况时,氧碳比和气化温度为反相关,其中氧碳比为0.8669,气化温度为900℃时,冷煤气效率为64.09%。

关键词：载氧体化学链气化石油焦硫磺模拟

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UIUC对教师教学能力培养的启示

高等工程教育研究 2008年第5期56卷 142-144页

作者：李蔚杨蕾刘洁段远源清华大学教学研究与培训中心清华大学教务处清华大学教务处综合办公室

教师教学能力的发展和提高,是持续提高高校教学质量和办学水平的基本保障。本文介绍分析美国UIUC在教师教学能力培养方面的成功经验,并针对我国高校教师培训提出建设性意见。

关键词：教学能力教师培训教师发展 UIUC