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Quantification on the Effects of Liquid-Vapor Separation in Air-Conditioning System by using Advanced Exergy Analysis

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Journal of Thermal Science 2020年第3期29卷 597-608页

作者： LI Yunhai chen Jianyong LIN Xu YANG Zhi chen Ying LUO xianglong School of Material and Energy Guangdong University of TechnologyGuangzhou 510006China Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter Guangzhou 510006China

Air-conditioning system consumes a large amount of electricity in residential sections,and its efficiency has drawn extensive concerns in energy-conscious ***-vapor separation is a heat transfer enhancement technology that can effectively improve the performance of the heat exchanger as well as the *** this paper,a regular air-conditioning system as the baseline(system-A)and other two air-conditioning systems with liquid-vapor separation heat exchanger(system-B and system-C)are comparatively *** component behaviors and system performances are deeply explored by using advanced exergy analysis with a focus on quantifying how much consequences come from the variants,***-vapor *** results indicate that the system-B has large reduced exergy destruction from the compressor and condenser at cooling mode relative to the *** system-C has mainly diminished exergy destruction in the compressor caused by other components relative to the *** heating mode,the system-C has an enhanced system exergy efficiency of 9.6%over the system-A,and it also has the decreased avoidable exergy destruction which is dominantly contributed by the compressor and ***,it is found that liquid-vapor separation mainly benefits the compressor and outdoor heat exchanger where it locates,leading to the system performance improvements.

关键词： air-conditioning system liquid-vapor separation advanced exergy analysis avoidable exergy destruction

Investigation of Vapor-liquid Ejector with Organic Working Fluids

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Journal of Thermal Science 2019年第1期28卷 61-71页

作者： chen Jianyong HUANG Yisheng NIU Zhiting LUO xianglong chen Ying YANG Zhi School of Material and Energy Guangdong University of Technology Guangdong Provincial Key Laboratory of Functional Soft Condensed Matter

The vapor-liquid ejector is a simply flow device and driven by thermal energy. In this paper, a modified mathematical model of the vapor-liquid ejector is proposed, and the validation shows good agreements with the experimental data. A study is carried out with six organic working fluids, namely R1233 zd(E), R1336 mzz(Z), R236 ea, R245 ca, R245 fa and R365 mfc. The influences of the entrainment ratio, the area ratio, the superheating at the vapor nozzle inlet, the subcooling at the liquid nozzle inlet, and the pressures at these inlets on the pressure lifting are parametrically investigated. An increase in the subcooling leads to the great increasing of pressure lifting and the superheating has slight effect on the pressure lifting, whereas others have the opposite tendency. The studies of the pressures and temperatures at the typical locations inside the vapor-liquid ejector are further conducted by using R1336 mzz(Z). The results show that the above parameters have great influence on these pressures and temperatures inside except that the pressures are insignificantly impacted by the superheating, and the temperatures are negligibly affected by the area ratio. R1336 mzz(Z) is recommended as a good working fluid for the vapor-liquid ejector.

关键词： vapor-liquid ejector modelling organic fluids pressure lifting

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华东沿海对外开放城市港口发展政策建议

上海海运学院学报 1987年第3期 1-10页

作者：萧钟熙侯德培余佑权陈祥龙

本文通过对华东沿海开放城市港口发展中存在经验教训的分析,参考了国外港口城市的发展经验,结合我国港口的实际情况,提出了华东沿海开放城市港口发展政策建议。这些政策建议包括:全面认识港口功能,搞好港口发展规划;适应外贸需要,划分... 详细信息

本文通过对华东沿海开放城市港口发展中存在经验教训的分析,参考了国外港口城市的发展经验,结合我国港口的实际情况,提出了华东沿海开放城市港口发展政策建议。这些政策建议包括:全面认识港口功能,搞好港口发展规划;适应外贸需要,划分港口协作群体;调动各方积极性,多渠道筹集建港资金;锐意改革,建立港口管理新体制;实行扶植政策,增强企业自我发展与改造能力;扩大视野,探索自由港的开发;建立港口法,逐步实现以法治港等八个方面的具体政策建议共二十七条。

关键词：港口货主码头港口城市外贸货物

水平圆管内R245fa高温冷凝传热特性研究

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工程热物理学报 2024年第9期45卷 2586-2592页

作者：吴展涛夏扬凯罗向龙何嘉诚陈健勇梁颖宗杨智陈颖广东工业大学材料与能源学院广州510006

高温热泵技术是解决工业减碳的有效方案,R245fa因其热物性较好而被广泛用于高温热泵系统,但目前对其高温工况下的流动冷凝传热特性研究却未见报道。本文实验研究了9 mm水平圆管内R245 fa在干度为0.1~0.9、质量流速为218~393 kg·m^(-2)... 详细信息

高温热泵技术是解决工业减碳的有效方案,R245fa因其热物性较好而被广泛用于高温热泵系统,但目前对其高温工况下的流动冷凝传热特性研究却未见报道。本文实验研究了9 mm水平圆管内R245 fa在干度为0.1~0.9、质量流速为218~393 kg·m^(-2)·s^(-1)、饱和温度为80~100°、热流密度为11300~22500 W·m^(-2)下的冷凝传热特性。在实验数据与传热关联式对比基础上,对现有关联式进行修正,修正后的关联式对实验数据的平均预测偏差为6.11%,预测精度显著提高。

关键词： R245fa 高温热泵实验研究冷凝

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地台风机对办公建筑室内环境的影响

洁净与空调技术 2008年第2期 29-34页

作者：王宏涛刘燕敏周磊孙伟陈祥龙和记黄埔地产(上海)有限公司同济大学

通过对某办公室使用地台风机送风的室内环境现场测试和问卷调查,分析和比较了地台风机的气流组织、热舒适、空气品质、声环境等室内环境特性,从而对于地板送风系统末端选择和维护提供一些行之有效建议。

关键词：地板送风地台风机气流组织

骨质疏松性椎体压缩骨折患者发生Kümmell病的风险预测

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中华骨科杂志 2024年第11期44卷 756-763页

作者：刘曾晶吴玲红陈家瑞王明波卓祥龙彭小忠谢湘涛柳州市工人医院脊柱外科(广西骨科生物材料研发与临床转化重点实验室) 柳州545000

目的探讨骨质疏松性椎体压缩骨折(osteoporotic vertebral compression fractures,OVCFs)患者发生Kümmell病(Kümmell's disease)的风险预测指标。方法采用1∶1频数匹配的病例对照研究设计,选取2021年1月至2023年6月在柳州市工人医院... 详细信息

目的探讨骨质疏松性椎体压缩骨折(osteoporotic vertebral compression fractures,OVCFs)患者发生Kümmell病(Kümmell's disease)的风险预测指标。方法采用1∶1频数匹配的病例对照研究设计,选取2021年1月至2023年6月在柳州市工人医院脊柱外科就诊并发或不并发Kümmell病的OVCFs患者为研究对象,纳入Kümmell病组和非Kümmell病组。详细收集患者的人口学资料、合并症及血清学指标,比较两组患者的基线特征。通过单因素分析筛选与目标变量明显相关的预测变量,并构建相关性热图评估目标变量与预测变量间的共线性,采用lasso回归模型进一步筛选潜在的预测指标,采用二分类logistic回归模型确定Kümmell病的风险预测指标。结果单因素分析筛选出与Kümmell病明显相关的预测变量包括年龄、骨密度、后凸Cobb角、双节段及以上椎体骨折等。Lasso回归分析确定了系数非零的关键预测指标包括年龄、骨密度、后凸Cobb角、双节段及以上椎体骨折、血小板计数(platelet count,PLT)、天冬氨酸转氨酶/谷氨酸转氨酶比值(aspartate aminotransferase/alanine aminotransferase,AST/ALT)、白蛋白(albumin,Alb)、白蛋白/球蛋白比值(albumin/globulin ratio,Alb/Glb)、碱性磷酸酶(Alkaline phosphatase,ALP)、血清尿素(serum urea,UREA)、血清尿酸(serum uric acid,SUA)、纤维结合蛋白(fibrinogen,Fn)、血糖(blood glucose,BG)及C反应蛋白(C-reactive protein,CRP)。相关性分析显示ALT与AST/ALT有较高的相关性(r=0.750),PLT与Alb表现出较低相关性(r=-0.110)。Logistic回归分析显示存在双节段及以上椎体骨折[OR=2.078,95%CI(1.072,4.025),P=0.030]、后凸Cobb角增大[OR=1.033,95%CI(1.008,1.058),P=0.009]、ALP水平升高[OR=1.013,95%CI(1.004,1.023),P=0.006]、SUA水平升高[OR=1.004,95%CI(1.000,1.007),P=0.043]、Fn水平降低[OR=0.996,95%CI(0.992,0.999),P=0.008]是OVCFs患者发生Kümmell病的预测指标。结论双节段及以上椎体骨折、后凸Cobb角增大、ALP和SUA水平升高、Fn水平降低,可作为OVCFs患者是否发展为Kümmell病的预警指标,监测这些指标对早期发现和干预有一定的作用。

关键词：椎体骨质疏松性骨折危险性评估预测 Kümmell's病

Experimental and Numerical Study of the Effect of Fuel/Air Mixing Modes on NO_(x) and CO Emissions of MILD Combustion in a Boiler Burner

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Journal of Thermal Science 2021年第2期30卷 656-667页

作者： ZHU Ziru XIONG Yan ZHENG xianglong chen Weijie REN Baohe XIAO Yunhan Key Laboratory of Advanced Energy and Power Institute of Engineering ThermophysicsChinese Academy of SciencesBeijing 100190China University of Chinese Academy of Sciences Beijing 100049China Research Center for Clean Energy and Power Chinese Academy of SciencesLianyungang 222069China

The Moderate or Intense Low-oxygen Dilution (MILD) combustion is characterized by low emissions,stable combustion and low noise for various kinds of fuel,which has great potential in the *** aim of this study is to investigate the effect of fuel/air mixing modes on NO_(x) and CO emissions of MILD combustion in a boiler burner by experiments and numerical *** types of fuel/air mixing modes (premixing mode,diffusion mode and hybrid mode) have been considered in this *** realizable k-ε turbulent model and the Eddy Dissipation Concept (EDC) combustion model were used in numerical *** addition to the temperature near the burner head,the calculation results match very well with the axial temperature distribution at the furnace *** flow pattern under different mixing modes is similar,while the hybrid mode has a higher OH concentration near the diffusive fuel nozzle than the premixing mode,and the corresponding position of the peak OH concentration is closer to the rear half of the *** distribution of temperature is extremely uniform for the premixing mode in the main reactive zone,which is typical for MILD *** is a distinct area where the reaction temperature is higher than 1600 K for the hybrid ***,in the main reactive zone,the gas recirculation ratio is high enough to ensure flue gas recirculation,which is beneficial to achieve MILD combustion at local *** the location where the axial distance is greater than 0.2 m,the gas recirculation ratio of the premixing mode is larger than that of the hybrid mode,which strengthens the entrainment of hot flue gas into the recirculated *** experimental results show that when the thermal intensity is less than 1.67 MW·m^(-3),the NO_(x) emissions are less than 15× 10^(-6)@3.5%O_(2) in near stoichiometric ratio in the premixing mode,and the CO emissions are less than 10× 10^(-6)@3.5%O2 under the same *** the diffusion mode,the NO_(x) emissio

关键词： MILD combustion boiler burner fuel/air mixing NO_(x) emissions CFD

Liquid metal-assisted hydrothermal preparation of cobalt disulfide on the polymer tape surface for flexible sensor

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Nano Research 2023年第5期16卷 7575-7582页

作者： Yudong Cao Haibin Zhong Bin chen xianglong Lin Jianfeng Shen Mingxin Ye Institute of Special materials and Technology Fudan UniversityShanghai 200433China Department of Chemistry Fudan UniversityShanghai 200433China Department of Materials Science Fudan UniversityShanghai 200433China

Nowadays,two-dimensional transition metal chalcogenides have become attractive materials for flexible wearable devices because of their intriguing chemistry characteristics and sensitivity to external ***,the growth of two-dimensional materials on polymer surfaces is generally carried out by the time-consuming and costly chemical vapor deposition *** the manufacturing and integration costs while improving the device performance remains to be ***,we report a simple liquid metal-assisted hydrothermal method for the growth of two-dimensional nanomaterials on the polymer ***,a layer of liquid metal was coated on commercial tape,while layered cobalt sulfide was grown on its surface by a simple one-step hydrothermal *** kinds of flexible sensors can be prepared,such as bending sensor,pressure sensor,humidity sensor,which can be used to detect motion,writing,breathing,other *** strategy can also be assigned to sensing signals on different objects,which may further expand and enrich the application of twodimensional materials in sensing.

关键词： liquid metal CoS_(2) flexible sensor hydrothermal

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中粒兰炭在高碳铬铁电炉的应用

铁合金 2018年第4期49卷 10-12页

作者：曾仁福陈相龙雷宪军肖成波酒钢集团宏电铁合金有限责任公司嘉峪关中国735100

为进一步降低成本,不断探索经济的炉料结构,对高碳铬铁电炉进行配加中粒兰炭入炉试验,并取得了很好的效果,不仅优化了矿热炉炉料结构,还降低了生产成本,为高碳铬铁降本增效积累了宝贵经验。

关键词：经济炉料兰炭试验成本