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Analysis of a 1 kW organic Rankine cycle using a scroll expander for engine coolant and exhaust heat recovery

Frontiers in Energy 2017年第4期11卷 527-534页

作者： yiji lu Anthony Paul ROSKILLY Long JIANG Longfei CHEN Xiaoli YU Sir Joseph Swan Centre for Energy Research Newcastle University Newcastle NE1 7RU UK Institute of Refrigeration and Cryogenics Shanghai Jiao TongUniversity Shanghai 200240 China School of Energy and Power Engineering Beihang University Beijing 100191 China Department of Energy Engineering Zhejiang University Hangzhou310027 China

The development of engine waste heat recov- ery technologies attracts ever increasing interests due to the rising strict policy requirements and environmental con- cerns. This paper presented the study of engine coolant and exhaust heat recovery using organic Rankine cycle （ORC）. Eight working fluids were selected to evaluate and compare the performance of the integrated waste heat recovery system. Rather than the conventional engine ORC system mainly focusing on the utilization of exhaust energy, this work proposed to fully use the engine coolant energy by changing the designed parameters of the ORC system. The case study selected a small engine as the heat source to drive the ORC system using a scroll expander for power production. The evaluation results suggest that under the engine rated condition, the solution to fully recover the engine coolant energy can achieve a higher power generation performance than that of the conven- tional engine ORC system. The results suggest that adding a recuperator to the ORC system can potentially improve the system performance when the working fluids are dry and the overall dumped heat demand of the system can be reduced by 12% under optimal conditions. When the ORC evaporating and condensing temperature are respectivelyset at 85℃ and 30℃, the integrated engine waste heat recovery system can improve the overall system efficiency by 9.3% with R600, R600a or n-Pentane as the working fluid.

关键词： organic Rankine cycle scroll expander cool-ant and exhaust recovery internal combustion engine

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Fabrication and Thermal Conductivity Improvement of Novel Composite Adsorbents adding with Nanoparticles

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Chinese Journal of Mechanical Engineering 2016年第6期29卷 1114-1119页

作者： WU Qibai YU Xiaofen ZHANG Haiyan CHEN Yiming LIU Liying XIE Xialin TANG Ke lu yiji WANG Yaodong ROSKILLY Anthony Paul School of Materials and Energy Guangdong University of Technology Sir Joseph Swan Centre for Energy Research Newcastle University

Thermal conductivity is one of key parameters of adsorbents, which will affect the overall system performance of adsorption chiller. To improve adsorbent＇s thermal conductivity is always one of research focuses in chemisorption field. A new chemical composite adsorbent is fabricated by adding carbon coated metal（Aluminum and Nickel） nanoparticles with three different addition amounts into the mixture of chloride salts and natural expanded graphite aiming to improve the thermal conductivity. The preparation processes and its thermal conductivity of this novel composite adsorbent are reported and summarized. Experimental results indicate that the nanoparticles are homogenously dispersed in the composite adsorbent by applying the reported preparation processes. The thermal conductivity of the composite adsorbent can averagely enlarge by 20% when the weight ratio of the added nanoparticles is 10 wt%. Moreover, carbon coated aluminum nanoparticles exhibit more effective enlargement in thermal conductivity than nickel nanoparticles. As for the composite adsorbent of CaCl2-NEG, there is a big reinforcement from 30% to 50% for Al@C nanoparticles, however only 10% in maximum caused by Ni@C nanoparticles. The proposed research provides a methodology to design and prepare thermal conductive chemical composite adsorbent.

关键词： thermal conductivity carbon coated metal nanoparticles chemical composite adsorbent

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城市绿地社会健康促进作用与增效路径研究综述

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中国城市林业 2023年第6期21卷 55-62页

作者：罗丹卢怡吉重庆大学建筑城规学院重庆400030

存量背景下绿色空间进入提质增效阶段,面对高质量发展目标和开放共享的社会需求,社会健康视角下的城市绿地健康效益研究愈发受到认可和重视,并呈现散点式、碎片化的研究状态,需对绿地社会健康的促进作用及其增效路径进行系统思考。文章... 详细信息

存量背景下绿色空间进入提质增效阶段,面对高质量发展目标和开放共享的社会需求,社会健康视角下的城市绿地健康效益研究愈发受到认可和重视,并呈现散点式、碎片化的研究状态,需对绿地社会健康的促进作用及其增效路径进行系统思考。文章通过梳理2015年以来的绿地社会健康研究并进行聚类分析发现,已有研究聚焦于绿色暴露、绿地感知、绿地使用的人际促进作用和社区及城市2个尺度下的社会环境改善、社会资源优化等方面,据此提出存量背景下基于“识别-评价-诊断-干预-管理”框架的社会健康增效路径。研究明晰了城市绿地社会健康概念、作用和增效路径的理论框架,以期为绿地社会健康实践和应用提供参考依据。

关键词：城市绿地社会健康健康促进增效路径文本分析

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内燃机余热驱动的储热式有机朗肯循环试验研究

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内燃机工程 2021年第6期42卷 1-9页

作者：李智俞小莉王雷高琪陆奕骥黄瑞浙江大学能源工程学院杭州310027 宁波中策动力机电集团有限公司宁波300350

为了提高尾气余热利用率并削弱热源波动对有机朗肯循环(organic Rankine cycle,ORC)的影响,提出了一种集成相变储热换热器的ORC系统,利用相变材料削弱尾气余热波动并储存热量。搭建了内燃机尾气余热直接驱动的储热式ORC试验台架,开展了... 详细信息

为了提高尾气余热利用率并削弱热源波动对有机朗肯循环(organic Rankine cycle,ORC)的影响,提出了一种集成相变储热换热器的ORC系统,利用相变材料削弱尾气余热波动并储存热量。搭建了内燃机尾气余热直接驱动的储热式ORC试验台架,开展了内燃机稳态工况和阶跃变工况下储热式ORC的热力学性能和动态性能试验研究。结果表明,内燃机稳态工况下尾气平均温度和平均流量为342℃和0.142 kg/s,蒸发压力0.75 MPa的条件下储热式ORC系统平均输出功率约为3.43 kW,平均热效率可达到12.7%,平均尾气余热回收率可达40.1%。内燃机阶跃工况下,工质出口温度、蒸发压力和过热度均呈现快速下降的趋势。试验结果还表明储热式ORC具备完全抵御发动机工况小幅波动的能力。在发动机工况阶跃变化比例过大时,储热换热器可以实现对尾气的补热,从而延长储热式ORC的安全工作时间。

关键词：余热回收有机朗肯循环内燃机波动热源相变储热

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通过朗肯循环回收内燃机余热的技术(英文)

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机床与液压 2012年第24期40卷 1-9页

作者：田国弘陆弈骥张勇李伟英国纽卡斯尔大学约瑟夫.斯万爵士能源研究中心纽卡斯尔NEl7RU 重庆理工大学重庆汽车学院重庆400054

介绍了内燃机余热回收领域的最新研究进展,分析了通过组织动力循环如有机朗肯循环进行热功转化的技术。首先研究了内燃机可回收余热的分布状况,然后对循环工质选择和膨胀机选型这2 个最关键的技术环节进行深入讨论,介绍了工质选择的基... 详细信息

介绍了内燃机余热回收领域的最新研究进展,分析了通过组织动力循环如有机朗肯循环进行热功转化的技术。首先研究了内燃机可回收余热的分布状况,然后对循环工质选择和膨胀机选型这2 个最关键的技术环节进行深入讨论,介绍了工质选择的基准和最新的膨胀机研究进展。最后讨论目前代表性的几家研究机构提供的具有不同概念的系统设计。前期研究结果表明,通过余热回收的方式最高可以提高系统效率达 30%以上,是一种有效的节能减排技术。

关键词：余热回收朗肯循环工质膨胀机

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照顾者共同决策家庭营养支持对食管癌术后患者营养状况、心理状况及生活质量的影响

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河北医药 2024年第1期46卷 91-94页

作者：陆怡吉彭纪芳于跃江苏省人民医院胸外科南京市210000

目的研究照顾者共同决策家庭营养支持对食管癌患者手术后生活质量、营养状况以及心理状况的影响。方法选取2019年7月至2022年9月收治的行食管癌手术治疗患者86例,依据据信封法将患者分为对照组和观察组44例,对照组术后予以常规法治疗... 详细信息

目的研究照顾者共同决策家庭营养支持对食管癌患者手术后生活质量、营养状况以及心理状况的影响。方法选取2019年7月至2022年9月收治的行食管癌手术治疗患者86例,依据据信封法将患者分为对照组和观察组44例,对照组术后予以常规法治疗,观察组在对照组基础上给予照顾者共同决策家庭营养支持。比较2组术后恢复情况、并发症发生情况及干预前后睡眠情况、营养指标、生活质量、心理情况。结果 2组术后首次肛门排气时间、肠鸣音恢复时间以及首次排便时间比较,差异无统计学意义P>0.05;2组干预前血红蛋白(Hb)、白蛋白(ALB)、前白蛋白(PA)、转铁蛋白(TRF)、抑郁自评量表(SDS)、匹兹堡睡眠质量指数量表(PSQI)评分、焦虑自评量表(SAS)、角色功能、躯体功能、社会功能以及情绪功能评分比较,差异无统计学意义(P>0.05)。观察组首次进食时间短于对照组(P<0.05),干预后2组PA、ALB、Hb、TRF、角色功能、情绪功能、躯体功能以及社会功能评分比术前上升且术后观察组高于对照组(P<0.05),干预后2组SAS、SDS、PSQI评分较干预前下降且观察组降低幅度大于对照组(P<0.05),观察组并发症总发生率低于对照组(P<0.05)。结论食管癌患者手术后进行照顾者共同决策家庭营养支持,营养状况改善明显,心理状况、生活质量显著提高,值得在临床上推广使用。

关键词：照顾者共同决策家庭营养支持食管癌术营养状况心理状况生活质量并发症发生情况术后恢复情况

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Corrosion Performance of Stainless Steel Reinforcement in the Concrete Prepared with Seawater and Coral Waste and Its Ecological Effects

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Journal of Renewable Materials 2020年第5期8卷 513-534页

作者： Xingguo Feng yiji Zhang Xiangyu lu Yiwen Xu Leyuan Zhang Chao Zhu Tong Wu Yashi Yang Xuhui Zhao Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security Hohai UniversityNanjing210098China State Key Laboratory of Green Building Materials Beijing100024China Key Laboratory of Marine Materials and Related Technologies Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China College of Water Conservancy Engineering Wanjiang University of TechnologyMaanshan243000China School of Materials Science and Engineering Beijing University of Chemical TechnologyBeijing100029China

Durability and ecological effects of the stainless steel reinforced coral waste concrete were compared with those of the carbon steel reinforced ordinary *** results showed that the corrosion current densities of the stainless steel in the coral waste concrete were less than one-tenth of those of the carbon steel in the same grade ordinary *** stainless steel in the seawater coral waste concrete maintained passivation even after more than two years of immersion in 3.5%NaCl solution,while the carbon steel counterparts in the ordinary concrete were seriously corroded under the same ***,the corrosion current density of the stainless steel reinforcement decreased slightly with the strength grade of the coral waste *** ecological evaluation indicated that the non-renewable energy consumption and CO_(2)emission of per cubic meter of the newly constructed stainless steel reinforced coral waste concrete were 23.72%and 1.419%less than those of the carbon steel reinforced ordinary concrete with the same grade,while the aforementioned two parameters of the former material were reduced by 44.81%and 32.0%in comparison to the latter one in 50 years duration.

关键词： Coral waste stainless steel seawater green concrete corrosion

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Proanthocyanidins Inhibit Seed Germination by Maintaining a High Level of Abscisic Acid in Arabidopsis thaliana

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Journal of Integrative Plant Biology 2012年第9期54卷 663-673页

作者： Liguo Jia Qiuyu Wu Nenghui Ye Rui Liu lu Shi Weifeng Xu Hui Zhi A. N. M. Rubaiyath Bin Rahman yiji Xia Jianhua Zhang Department of Biology Hong Kong Baptist University Hong Kong China School of Life Sciences and State Key Laboratory of Agrobiotechnology The Chinese University of Hong Kong Hong Kong China

Proanthocyanidins （PAs） are the main products of the flavonoid biosynthetic pathway in seeds, but their biological function during seed germination is still unclear. We observed that seed germination is delayed with the increase of exogenous PA concentration in Arabidopsis. A similar inhibitory effect occurred in peeled Brassica napus seeds, which was observed by measuring radicle elongation. Using abscisic acid （ABA）, a biosynthetic and metabolic inhibitor, and gene expression analysis by real-time polymerase chain reaction, we found that the inhibitory effect of PAs on seed germination is due to their promotion of ABA via de novo biogenesis, rather than by any inhibition of its degradation. Consistent with the relationship between PA content and ABA accumulation in seeds, PA-deficient mutants maintain a lower level of ABA compared with wild-types during germination. Our data suggest that PA distribution in the seed coat can act as a doorkeeper to seed germination. PA regulation of seed germination is mediated by the ABA signaling pathway.

关键词： Abscisic acid Arabidopsis Brassica napus proanthocyanidins seed germination.

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QTL mapping and candidate gene analysis of resistance to clubroot in Brassica oleracea

QTL mapping and candidate gene analysis of resistance to clu...

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第二十届中国作物学会学术年会

作者： yiji Shi Kai Wang Keqi Li Mingjiao lu Zhen Huang College of Agronomy Northwest A&F University

Clubroot is a soil-borne disease caused by Plasmodiophora brassicae（P. brassicae）. In recent years, the incidence of rapeseed clubroot has increased year by year, with an affected area of over 667,000 hectares and even complete crop failure in severely affected areas. Breeding clubroot-resistant（CR） rapeseed is considered the most cost-effective and effective method for controlling the disease. However, a few varieties of rapeseed resistant to root swelling disease has reported, and the donor genes are relatively simple, making it easy to lose disease resistance. Over 20 QTLs for resistance to clubroot have been located on turnip or Chinese cabbage（AA, 2n=20）, among which cra and Crr1a have been successfully cloned. However, there are fewer reports on CR genes in the C genome. Therefore, exploring CR genes is great significance for breeding CR rapeseed. In this study, a BC1 segregating population was created by crossing the CR cabbage Wengan12 with the susceptible cabbage Z5 infected with P4 race of P. brassicae. A total of 661 BC1 plants were tested upon inoculation, and 326 plants were resistant while 335 were susceptible, indicating that this resistance is controlled by a major-effect gene at a ratio of 1:1（χ = 0.175）. Thirty extremely resistant and susceptible plants were selected for bulked segregant analysis（BSA）, and a QTL named crc7 significantly associated with resistance to clubroot was located on chromosome C07. The QTL was then fine mapping to a range of 170.4 kb between molecular markers InDel17（51.773 Mb） and InDel19（51.943 Mb）. There are 24 genes in this interval, including three disease-resistant genes containing NLRs（nucleotidebinding domain leucine-rich repeat） domain: BoPR6, BoPR7, and BoPR9. Bo PR6 has the same amino acid sequence between resistant and susceptible parents;BoPR7 has only 59.65% sequence identity between resistant and susceptible parents;BoPR9 has seven amino acid sequence differences between the two parents with 99.26% similarity.

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内界膜翻转覆盖与内界膜多层填塞治疗高度近视黄斑裂孔性视网膜脱离的疗效对比观察

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中华眼底病杂志 2023年第12期39卷 964-968页

作者：潘奕吉杨家翼易贝茜李璐苏钰贺涛武汉大学人民医院眼科中心武汉430000

目的对比观察内界膜(ILM)翻转覆盖与ILM多层填塞治疗高度近视黄斑裂孔性视网膜脱离(MHRD)的疗效。方法回顾性临床研究。2019年11月至2022年6月于武汉大学人民医院眼科中心检查确诊的连续MHRD患者53例53只眼纳入研究。其中,男性21例21只... 详细信息

目的对比观察内界膜(ILM)翻转覆盖与ILM多层填塞治疗高度近视黄斑裂孔性视网膜脱离(MHRD)的疗效。方法回顾性临床研究。2019年11月至2022年6月于武汉大学人民医院眼科中心检查确诊的连续MHRD患者53例53只眼纳入研究。其中,男性21例21只眼,女性32例32只眼;年龄(55.28±11.40)岁。根据手术方式将患者分为ILM覆盖组(2019年11月至2020年9月)、ILM多层填塞组(2020年10月至2022年6月),分别为11例11只眼、42例42只眼。所有患眼均行最佳矫正视力(BCVA)、光相干断层扫描检查。BCVA检查采用国际标准视力表进行,统计时换算为最小分辨角对数(logMAR)视力。患眼均接受标准经睫状平坦部三通道23G玻璃体切割手术。ILM覆盖组联合行上方ILM翻转覆盖;ILM多层填塞组联合行保留黄斑区ILM的环形ILM剥离,并将裂孔周围的ILM翻转行多层ILM填塞。手术后随访时间≥6个月。随访时采用与手术前相同的设备和方法行相关检查。观察患眼BCVA以及裂孔闭合、视网膜复位、黄斑区增生情况。结果ILM覆盖组11只眼中,手术后1周时,裂孔闭合7只眼;1个月时,所有患眼裂孔均闭合;6个月时,裂孔闭合9只眼,裂孔再次开放2只眼。ILM多层填塞组42只眼中,手术后1周及1、6个月时,裂孔闭合41只眼;裂孔未闭合1只眼。手术后6个月时,ILM覆盖组、ILM多层填塞组患眼BCVA分别为0.91±0.29、1.05±0.39;两组BCVA比较,差异无统计学意义(t=1.140,P=0.260);与手术前比较,两组患眼BCVA均明显改善,差异有统计学意义(t=8.490、13.840,P<0.0001)。手术后6个月时,ILM覆盖组11只眼中,视网膜复位10只眼;所有患眼均未见明显黄斑区增生。ILM多层填塞组42只眼视网膜均复位,其中明显黄斑区增生19只眼。结论ILM翻转覆盖或ILM多层填塞均有助于高度近视MHRD患眼裂孔闭合,改善视力。与ILM翻转覆盖比较,ILM多层填塞手术后裂孔闭合时间更早且闭合率更高,裂孔再次开放率更低;ILM多层填塞可能会导致较高比例的黄斑区增生形成,但对手术后6个月视力恢复无影响。

关键词：高度近视黄斑裂孔性视网膜脱离内界膜翻转覆盖内界膜多层填塞

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