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ZnO nanorefrigerant in R152a refrigeration system for energy conservation and green environment
D. SENDIL KUMAR,R. ELANSEZHIAN
《机械工程前沿(英文)》 2014年 第9卷 第1期 页码 75-80 doi: 10.1007/s11465-014-0285-y
In this paper the reliability and performance of a vapour compression refrigeration system with ZnO nanoparticles in the working fluid was investigated experimentally. Nanorefrigerant was synthesized on the basis of the concept of the nanofluids, which was prepared by mixing ZnO nanoparticles with R152a refrigerant. The conventional refrigerant R134a has a global warming potential (GWP) of 1300 whereas R152a has a significant reduced value of GWP of 140 only. An experimental test rig is designed and fabricated indigenously in the laboratory to carry out the investigations. ZnO nanoparticles with refrigerant mixture were used in HFC R152a refrigeration system. The system performance with nanoparticles was then investigated. The concentration of nano ZnO ranges in the order of 0.1% v, 0.3% v and 0.5%v with particle size of 50 nm and 150 g of R152a was charged and tests were conducted. The compressor suction pressure, discharge pressure and evaporator temperature were measured. The results indicated that ZnO nanorefrigerant works normally and safely in the system. The ZnO nanoparticle concentration is an important factor considered for heat transfer enhancement in the refrigeration system. The performance of the system was significantly improved with 21% less energy consumption when 0.5%v ZnO-R152a refrigerant. Both the suction pressure and discharge pressure were lowered by 10.5% when nanorefrigerant was used. The evaporator temperature was reduced by 6% with the use of nanorefrigerant. Hence ZnO nanoparticles could be used in refrigeration system to considerably reduce energy consumption. The usage of R152a with zero ozone depleting potential (ODP) and very less GWP and thus provides a green and clean environment. The complete experimental results and their analysis are reported in the main paper.
关键词: ZnO nanorefrigerant reduced GWP COP pressure ratio green energy
《化学科学与工程前沿(英文)》 2021年 第15卷 第6期 页码 1572-1582 doi: 10.1007/s11705-021-2112-4
关键词: reduced graphene oxide gold nanoparticles electrochemical biosensor cholesterol oxidase cholesterol
Lijuan Qiu, Ruiyang Zhang, Ying Zhang, Chengjin Li, Qian Zhang, Ying Zhou
《化学科学与工程前沿(英文)》 2018年 第12卷 第3期 页码 390-399 doi: 10.1007/s11705-018-1751-6
Water pollution has become an urgent issue for our modern society, and it is highly desirable to rapidly deal with the water pollution without secondary pollution. In this paper, we have prepared a reduced graphene oxide (RGO) wrapped sponge with superhydrophobicity and mechanically flexibility via a facile low-temperature thermal treatment method under a reducing atmosphere. The skeleton of this sponge is completely covered with RGO layers which are closely linked to the skeleton. This sponge has an abundant pore structure, high selectivity, good recyclability, low cost, and outstanding adsorption capacity for floating oil or heavy oil underwater. In addition, this sponge can maintain excellent adsorption performance for various oils and organic solvents over 50 cycles by squeezing, and exhibits extremely high separation efficiencies, up to 6 × 106 and 3.6 × 106 L·m−3·h−1 in non-turbulent and turbulent water/oil systems, respectively. This superhydrophobic adsorbent with attractive properties may find various applications, especially in large-scale removal of organic contaminants and oil spill cleanup.
关键词: superhydrophobicity mechanically flexibility water/oil separation reduced graphene oxide wrapped sponge
《化学科学与工程前沿(英文)》 2023年 第17卷 第9期 页码 1231-1243 doi: 10.1007/s11705-023-2306-z
关键词: anthraquinone-based polyimide multi-effect tin dioxide reduced graphene oxide lithium-ion battery
Kai Wang, Jinbo Pang, Liwei Li, Shengzhe Zhou, Yuhao Li, Tiezhu Zhang
《化学科学与工程前沿(英文)》 2018年 第12卷 第3期 页码 376-382 doi: 10.1007/s11705-018-1705-z
Carbon nanotubes/graphene composites have superior mechanical, electrical and electrochemistry properties with carbon nanotubes as a hydrophobicity boosting agent. Their extraordinary hydrophobic performance is highly suitable for electrode applications in lithium ion batteries and supercapacitors which often employ organic electrolytes. Also the hydrophobic features enable the oil enrichment for the crude oil separation from seawater. The ever reported synthesis routes towards such a composite either involve complicated multi-step reactions, e.g., chemical vapor depositions, or lead to insufficient extrusion of carbon nanotubes in the chemical reductions of graphene oxide, e.g., fully embedding between the compact graphene oxide sheets. As a consequence, the formation of standalone carbon nanotubes over graphene sheets remains of high interests. Herein we use the facile flash light irradiation method to induce the reduction of graphene oxides in the presence of carbon nanotubes. Photographs, micrographs, X-ray diffraction, infrared spectroscopy and thermogravimetric analysis all indicate that graphene oxides has been reduced. And the contact angle tests confirm the excellent hydrophobic performances of the synthesized carbon nanotube/reduced graphene oxide composite films. This one-step treatment represents a straightforward and high efficiency way for the reduction of carbon nanotubes/graphene oxides composites.
关键词: carbon nanotubes graphene composite flash irradiation method reduced graphene oxide contact angles
Hasan Oliaei Torshizi, Ali Nakhaei Pour, Ali Mohammadi, Yahya Zamani, Seyed Mehdi Kamali Shahri
《化学科学与工程前沿(英文)》 2021年 第15卷 第2期 页码 299-309 doi: 10.1007/s11705-020-1925-x
关键词: cobalt catalyst cobalt particle size Fischer-Tropsch synthesis reduced graphene oxide supported catalyst
strong>Fabrication and photocatalytic ability of an Au/TiO2/reduced
Fenghe Lv, Hua Wang, Zhangliang Li, Qi Zhang, Xuan Liu, Yan Su
《环境科学与工程前沿(英文)》 2018年 第12卷 第1期 doi: 10.1007/s11783-017-0977-8
关键词: Reduced graphene oxide Au TiO2 Nanocomposite Photocatalysis
Bei Ye, Zhuo Chen, Xinzheng Li, Jianan Liu, Qianyuan Wu, Cheng Yang, Hongying Hu, Ronghe Wang
《环境科学与工程前沿(英文)》 2019年 第13卷 第6期 doi: 10.1007/s11783-019-1170-z
关键词: Bromate Catalytic ozonation Graphene oxide Cerium dioxide
《医学前沿(英文)》 2022年 第16卷 第2期 页码 295-305 doi: 10.1007/s11684-021-0857-2
关键词: chronic heart failure trimethylamine-N-oxide flavin monooxygenase 3 single nucleotide polymorphism
design of novel proton-pump inhibitors with reduced adverse effects
Xiaoyi Li, Hong Kang, Wensheng Liu, Sarita Singhal, Na Jiao, Yong Wang, Lixin Zhu, Ruixin Zhu
《医学前沿(英文)》 2019年 第13卷 第2期 页码 277-284 doi: 10.1007/s11684-018-0630-3
关键词: proton-pump inhibitor adverse effect pharmacological mechanism toxicological mechanism pKa calculation
Toward the development of process plans with reduced environmental impacts
Fu ZHAO, Vance R. MURRAY, Karthik RAMANI, John W. SUTHERLAND
《机械工程前沿(英文)》 2012年 第7卷 第3期 页码 231-246 doi: 10.1007/s11465-012-0334-3
Manufacturing process planning serves as a pivotal link between design and manufacturing. Process planning decisions play a critical role in determining the cost and environmental impacts associated with manufacturing. Past efforts to address environmental issues during process planning are briefly reviewed and potential approaches that can achieve reduced environmental impacts are then discussed. A proposed method is presented for environmentally conscious process planning. The method begins with an existing process plan, and then identifies impactful process steps, and associated design features, in terms of manufacturing cost and environmental impact. Alternative processes that can achieve these features are then considered to generate alternative process plans. These alternatives are then evaluated in terms of economic and environmental performance. The results of these evaluations are then used to generate a set of process plans that are non-dominated with respect to manufacturing cost and environmental impact objectives to produce a Pareto frontier. The proposed method is demonstrated using the manufacturing of a prosthetic hip shell as a case study.
关键词: process planning life cycle assessment (LCA) sustainable manufacturing prosthetic hip shell
《医学前沿(英文)》 2022年 第16卷 第1期 页码 102-110 doi: 10.1007/s11684-021-0850-9
关键词: COVID-19 RAS inhibitor hypertension all-cause mortality
Largely reduced cross-plane thermal conductivity of nanoporous In
Dongchao XU, Quan WANG, Xuewang WU, Jie ZHU, Hongbo ZHAO, Bo XIAO, Xiaojia WANG, Xiaoliang WANG, Qing HAO
《能源前沿(英文)》 2018年 第12卷 第1期 页码 127-136 doi: 10.1007/s11708-018-0519-5
关键词: nanoporous film thermoelectrics phonon mean free path diffusive scattering
Xiuning HUA,Wei WANG,Feng WANG
《环境科学与工程前沿(英文)》 2015年 第9卷 第6期 页码 1130-1138 doi: 10.1007/s11783-015-0821-y
关键词: chemical looping combustion iron-based oxygen carriers reduction kinetics carbon monoxide statistics
Proposing two new methods to decrease lateral-torsional buckling in reduced beam section connections
Samira EBRAHIMI; Nasrin BAKHSHAYESH EGHBALI; Mohammad Mehdi AHMADI
《结构与土木工程前沿(英文)》 2022年 第16卷 第12期 页码 1581-1598 doi: 10.1007/s11709-022-0886-1
关键词: RBS RBS-ST RW-RBS lateral-torsional buckling cyclic performance
标题 作者 时间 类型 操作
ZnO nanorefrigerant in R152a refrigeration system for energy conservation and green environment
D. SENDIL KUMAR,R. ELANSEZHIAN
期刊论文
Gold nanoparticles/single-stranded DNA-reduced graphene oxide nanocomposites based electrochemical biosensor
期刊论文
Superhydrophobic, mechanically flexible and recyclable reduced graphene oxide wrapped sponge for highly
Lijuan Qiu, Ruiyang Zhang, Ying Zhang, Chengjin Li, Qian Zhang, Ying Zhou
期刊论文
Multi-effect anthraquinone-based polyimide enclosed SnO/reduced graphene oxide composite as high-performance
期刊论文
Synthesis of hydrophobic carbon nanotubes/reduced graphene oxide composite films by flash light irradiation
Kai Wang, Jinbo Pang, Liwei Li, Shengzhe Zhou, Yuhao Li, Tiezhu Zhang
期刊论文
Fischer-Tropsch synthesis by reduced graphene oxide nanosheets supported cobalt catalysts: Role of support
Hasan Oliaei Torshizi, Ali Nakhaei Pour, Ali Mohammadi, Yahya Zamani, Seyed Mehdi Kamali Shahri
期刊论文
strong>Fabrication and photocatalytic ability of an Au/TiO2/reduced
Fenghe Lv, Hua Wang, Zhangliang Li, Qi Zhang, Xuan Liu, Yan Su
期刊论文
Inhibition of bromate formation by reduced graphene oxide supported cerium dioxide during ozonation of
Bei Ye, Zhuo Chen, Xinzheng Li, Jianan Liu, Qianyuan Wu, Cheng Yang, Hongying Hu, Ronghe Wang
期刊论文
FMO3--TMAO axis modulates the clinical outcome in chronic heart-failure patients with reduced ejection
期刊论文
design of novel proton-pump inhibitors with reduced adverse effects
Xiaoyi Li, Hong Kang, Wensheng Liu, Sarita Singhal, Na Jiao, Yong Wang, Lixin Zhu, Ruixin Zhu
期刊论文
Toward the development of process plans with reduced environmental impacts
Fu ZHAO, Vance R. MURRAY, Karthik RAMANI, John W. SUTHERLAND
期刊论文
Renin--angiotensin system inhibitor is associated with the reduced risk of all-cause mortality in COVID
期刊论文
Largely reduced cross-plane thermal conductivity of nanoporous In
Dongchao XU, Quan WANG, Xuewang WU, Jie ZHU, Hongbo ZHAO, Bo XIAO, Xiaojia WANG, Xiaoliang WANG, Qing HAO
期刊论文
Performance and kinetics of iron-based oxygen carriers reduced by carbon monoxide for chemical looping
Xiuning HUA,Wei WANG,Feng WANG
期刊论文