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1. Conveying performance of drilling tool of auger miner at different strike angles based on discrete element method

Author:
Fu, Lin; Wang, Kai; Hu, Bo; van Xo, Nguyen
Source:
Powder technology 2021 v.378 pp. 202-215
ISSN:
0032-5910
Subject:
equipment performance,   etc   ; drilling; mining;     Show all 3 Subjects
Abstract:
... The effect of strike angle on the conveying performance of drilling tools was studied using the discrete element method for efficient, reliable and economical auger mining. The results show that there are significant differences in volume fill level and power among the rows of drilling rods and drilling heads at any strike angles. It is necessary to take steps in the retreat process to improve the ...
DOI:
10.1016/j.powtec.2020.07.069

2. Effect of cylinder vortex stabilizer on separator performance of the Stairmand cyclone

Author:
Duan, Jihai; Gao, Shun; Hou, Chenguang; Wang, Weiwen; Zhang, Pan; Li, Chaojie
Source:
Powder technology 2020 v.372 pp. 305-316
ISSN:
0032-5910
Subject:
equipment performance,   etc   ; separation; separators;     Show all 3 Subjects
Abstract:
... The phenomena of precessing vortex core (PVC), entrainment of particles from the ash hopper, and swing of the vortex end in swirling flow have a negative effect on flow field and separation performance of cyclone. In order to alleviate these negative effects, a strategy to improve flow structure by installing cylinder vortex stabilizer is proposed, and the effects of different size stabilizers on ...
DOI:
10.1016/j.powtec.2020.06.031

3. Multi-level energy efficiency evaluation for die casting workshop based on fog-cloud computing

Author:
Cao, Huajun; Chen, Erheng; Yi, Hao; Li, Hongcheng; Zhu, Linquan; Wen, Xuanhao
Source:
Energy 2021 v.226 pp. 120397
ISSN:
0360-5442
Subject:
equipment performance,   etc   ; case studies; energy conservation; energy efficiency; equipment;     Show all 5 Subjects
Abstract:
... Die casting is a complex process performed in harsh working environments. Driven by cost and environmental pressure, die casting, as one of the most energy-intensive manufacturing processes, has received increasing attention on enhancing energy efficiency toward greener and more sustainable manufacturing. Energy efficiency evaluation is a starting point for energy audits and analysis of energy-sav ...
DOI:
10.1016/j.energy.2021.120397

4. Design of Laboratory Test Equipment for Testing the Hydrostatic Transducers

Author:
Nosian, Jozef; Hujo, Ľubomír; Zastempowski, Marcin; Janoušková, Romana
Source:
Acta technologica agriculturae 2021 v.24 no.1 pp. 35-40
ISSN:
1338-5267
Subject:
equipment performance,   etc   ; economic costs; laboratory equipment; laboratory experimentation; measurement;     Show all 5 Subjects
Abstract:
... The article presented describes a new design of measuring chains in laboratory test equipment, which are used for testing the hydrostatic transducers and hydraulic fluids. Laboratory test equipment allows simultaneous observation of parameters of hydrostatic transducers and hydraulic fluids by simulating the operating conditions under laboratory conditions, what can significantly reduce the testin ...
DOI:
10.2478/ata-2021-0006

5. A model predictive control approach in microgrid considering multi-uncertainty of electric vehicles

Author:
Wu, Chuanshen; Gao, Shan; Liu, Yu; Song, Tiancheng E.; Han, Haiteng
Source:
Renewable energy 2021 v.163 pp. 1385-1396
ISSN:
0960-1481
Subject:
equipment performance,   etc   ; electric vehicles; models; renewable energy sources; uncertainty;     Show all 5 Subjects
Abstract:
... Managing uncertainty is key to enhancing robustness in microgrids. This study focuses on the uncertainties in aggregated electric vehicles (EVs) and establishes a two-layer model predictive control (MPC) strategy for charging EVs with a microgrid. The uncertainty in sampling results of EV connection times to the microgrid and the uncertainty in sampling results of state of charge (SOC) of each EV ...
DOI:
10.1016/j.renene.2020.08.137

6. Analysis of measured and simulated performance of a grid-connected PV system in eastern India

Author:
Goel, Sonali; Sharma, Renu
Source:
Environment, development and sustainability 2021 v.23 no.1 pp. 451-476
ISSN:
1387-585X
Subject:
equipment performance,   etc   ; photovoltaic cells; solar collectors; solar energy; India;     Show all 5 Subjects
Abstract:
... This paper compares the observed and simulated performance of a 11.2 kWp grid-connected rooftop solar PV system installed in SOA (Deemed to be University), Bhubaneswar, India. The system consists of 40 polycrystalline silicon modules tilted at an angle of 21° facing towards the south. The performance parameters were measured during 2015 and were analysed by using two software tools: PVSyst and Hel ...
DOI:
10.1007/s10668-020-00591-7

7. Effect of changes in the feed duct on hydrocyclone performance

Author:
Rocha, C.A.O.; Ullmann, G.; Silva, D.O.; Vieira, L.G.M.
Source:
Powder technology 2020 v.374 pp. 283-289
ISSN:
0032-5910
Subject:
equipment performance,   etc   ; hydrodynamics; quartzite; technology;     Show all 4 Subjects
Abstract:
... In recent years, hydrocyclones have been studied to improve their performance. This study aimed to evaluate the modification of the feed duct of a hydrocyclone from circular to square and rectangular using 3D CFD simulations under single-phase to assess the flow hydrodynamics. The simulations suggest that a non-circular feed duct provided small changes in Euler numbers (Eu), suggesting improvement ...
DOI:
10.1016/j.powtec.2020.07.001

8. Probe and Control of the Tiny Amounts of Dopants in BHJ Film Enable Higher Performance of Polymer Solar Cells

Author:
Chen, Zhenyu; Tang, Yabing; Lin, Baojun; Zhao, Hanzhang; Li, Tao; Min, Tai; Yan, Han; Ma, Wei
Source:
ACS applied materials & interfaces 2020 v.12 no.22 pp. 25115-25124
ISSN:
1944-8252
Subject:
equipment performance,   etc   ; polymers; solar cells;     Show all 3 Subjects
Abstract:
... To achieve efficient doping in polymer solar cells (PSCs), the dopant needs to be selectively located in the binary components of a bulk heterojunction (BHJ) film according to its polarity. The rarely studied n-type dopant is thoroughly examined in a simplified planar heterojunction (PHJ) device to address its favored location in the active layer. Results show that the n-dopant distribution in the ...
DOI:
10.1021/acsami.0c06127

9. A mixed hole transport material employing a highly planar conjugated molecule for efficient and stable perovskite solar cells

Author:
Ji, Xiaofei; Zhou, Tong; Ke, Xin; Wang, Wenxuan; Wu, Shanyu; Zhang, Mingtao; Lu, Di; Zhang, Xiaodan; Liu, Yongsheng
Source:
Journal of materials chemistry A 2020 v.8 no.10 pp. 5163-5170
ISSN:
2050-7496
Subject:
equipment performance,   etc   ; energy; solar cells;     Show all 3 Subjects
Abstract:
... We successfully demonstrated a simple and facile way to improve the efficiency and stability of perovskite solar cells using a mixed hole transport material, which was a composite of spiro-OMeTAD and a conjugated small molecule, DRSBDT-2OT. DRSBDT-2OT, with an acceptor–donor–acceptor (A–D–A) structure, exhibits a high molecular planarity via noncovalent intramolecular S⋯O interactions, leading to ...
DOI:
10.1039/c9ta13365h

10. Mie Resonant Structural Colors

Author:
Baek, Kyungnae; Kim, Youngji; Mohd-Noor, Syazwani; Hyun, Jerome K.
Source:
ACS applied materials & interfaces 2020 v.12 no.5 pp. 5300-5318
ISSN:
1944-8252
Subject:
equipment performance,   etc   ; color; equipment design;     Show all 3 Subjects
Abstract:
... Structural colors refer to colors produced by the interference of light scattered by judiciously arranged nano- or microscopic structures. In this Forum Article, we discuss the use of Mie resonant scattering in structural colors with dielectric and metal–dielectric hybrid structures to achieve notable figures of merit in pixel size and gamut range. Compared with plasmonic structures, resonant diel ...
DOI:
10.1021/acsami.9b16683

11. A sequential model-based approach for gas turbine performance diagnostics

Author:
Chen, Yu-Zhi; Zhao, Xu-Dong; Xiang, Heng-Chao; Tsoutsanis, Elias
Source:
Energy 2021 v.220 pp. 119657
ISSN:
0360-5442
Subject:
equipment performance,   etc   ; algorithms; compressors; computer software; energy efficiency; fouling; gas turbine engines; path analysis;     Show all 8 Subjects
Abstract:
... The gradual degradation of gas turbine components is an inevitable result of engine operation, impacting engine availability, reliability, and operating cost. Gas path analysis plays an essential role in engine fault diagnosis. Accurate and fast diagnosis of multiple simultaneously degraded components has always posed a challenge, especially when the number of available measurements is limited. Th ...
DOI:
10.1016/j.energy.2020.119657

12. Resonant Tender X-ray Diffraction for Disclosing the Molecular Packing of Paracrystalline Conjugated Polymer Films

Author:
Freychet, Guillaume; Gann, Eliot; Thomsen, Lars; Jiao, Xuechen; McNeill, Christopher R.
Source:
Journal of the American Chemical Society 2021 v.143 no.3 pp. 1409-1415
ISSN:
1520-5126
Subject:
equipment performance,   etc   ; X-ray diffraction; crystal structure; electron transfer; electronic equipment; films (materials); microstructure; polymers; sulfur;     Show all 9 Subjects
Abstract:
... The performance of optoelectronic devices based on conjugated polymers is critically dependent upon molecular packing; however, the paracrystalline nature of these materials limits the amount of information that can be extracted from conventional X-ray diffraction. Resonant diffraction (also known as anomalous diffraction) occurs when the X-ray energy used coincides with an X-ray absorption edge i ...
DOI:
10.1021/jacs.0c10721

13. Experimental research on the separation performance of W-shaped hydrocyclone

Author:
Jiang, Lanyue; Liu, Peikun; Yang, Xinghua; Zhang, Yuekan; Li, Xiaoyu; Zhang, Yulong; Wang, Hui
Source:
Powder technology 2020 v.372 pp. 532-541
ISSN:
0032-5910
Subject:
equipment performance,   etc   ; industrial sites; particle size; separation;     Show all 4 Subjects
Abstract:
... The entrainment of fine particles in underflow of a grinding-classification hydrocyclone can cause ore over-grinding, reducing both the metal recovery and the ball mill throughput. This problem is addressed in this study by proposing a W-shaped hydrocyclone that effectively reduces the fine particle in the underflow. The separation performance of the W-shaped hydrocyclone was investigated in depth ...
DOI:
10.1016/j.powtec.2020.06.047

14. In-phase and out-of-phase pitch and roll oscillations of model wind turbines within uniform arrays

Author:
Fu, Shifeng; Zhang, Buen; Zheng, Yuan; Chamorro, Leonardo P.
Source:
Applied energy 2020 v.269 pp. 114921
ISSN:
0306-2619
Subject:
equipment performance,   etc   ; models; wind power; wind turbines;     Show all 4 Subjects
Abstract:
... We experimentally explored the impact of in-phase and complete out-of-phase pitch and roll oscillations on the mean power output and the structure of the power fluctuations of turbines within 3×2 uniform arrays. The flow past selected configurations was also characterized with hotwire anemometry. The parameter space included combinations of three amplitudes and two frequencies of the turbine oscil ...
DOI:
10.1016/j.apenergy.2020.114921

15. Effects of corona wire distribution on characteristics of electrostatic precipitator

Author:
Wang, Xiaohua
Source:
Powder technology 2020 v.366 pp. 36-42
ISSN:
0032-5910
Subject:
equipment performance,   etc   ; electric field; equipment; powders;     Show all 4 Subjects
Abstract:
... The effects of corona wire distribution on characteristics of electrostatic precipitators were numerically studied. The electric field, charge density and removal efficiency were discussed at various Sww/Swₚ (ratio of wire-wire length to wire-plate length). The electric field and charge density had an oscillating distribution on the collecting plates. With the decrease of Sww/Swₚ, the electric fie ...
DOI:
10.1016/j.powtec.2020.02.044

16. Comparing methods for improving spark-ignited engine efficiency: Over-expansion with multi-link cranktrain and high compression ratio with late intake valve closing

Author:
Yang, Zhuyong; Miganakallu, Niranjan; Miller, Tyler; Worm, Jeremy; Naber, Jeffrey; Roth, David
Source:
Applied energy 2020 v.262 pp. 114560
ISSN:
0306-2619
Subject:
equipment performance,   etc   ; engines; equipment design; geometry; models;     Show all 5 Subjects
Abstract:
... A common approach of high efficiency engines is to utilize high compression with late intake valve closing (LIVC) to realize an over-expanded cycle. A multi-link cranktrain can also realize an over-expanded cycle with the same geometric intake displacement as a baseline engine while extending the expansion stroke. These two types of over-expanded cycle engines and a baseline engine are investigate ...
DOI:
10.1016/j.apenergy.2020.114560

17. Excellent Moisture Stability and Efficiency of Inverted All-Inorganic CsPbIBr₂ Perovskite Solar Cells through Molecule Interface Engineering

Author:
Yang, Shuzhang; Wang, Liang; Gao, Liguo; Cao, Junmei; Han, Qianji; Yu, Fengyang; Kamata, Yusuke; Zhang, Chu; Fan, Meiqiang; Wei, Guoying; Ma, Tingli
Source:
ACS applied materials & interfaces 2020 v.12 no.12 pp. 13931-13940
ISSN:
1944-8252
Subject:
equipment performance,   etc   ; energy conversion; halides; solar cells;     Show all 4 Subjects
Abstract:
... All-inorganic lead halide perovskite solar cells (PSCs) have drawn widespread interest because of its excellent thermal stability compared to its organic–inorganic hybrid counterpart. Poor phase stability caused by moisture, however, has thus far limited their commercial application. Herein, by modifying the interface between the hole-transport layer (HTL) and the perovskite light absorption layer ...
DOI:
10.1021/acsami.9b23532

18. A double-choking theory as an explanation of the evolution laws of ejector performance with various operational and geometrical parameters

Author:
Tang, Yongzhi; Liu, Zhongliang; Li, Yanxia; Yang, Nan; Wan, Yangda; Chua, Kian Jon
Source:
Energy conversion and management 2020 v.206 pp. 112499
ISSN:
0196-8904
Subject:
equipment performance,   etc   ; mathematics; mixing; nozzles; quantitative analysis;     Show all 5 Subjects
Abstract:
... There are few systematic studies to investigate the inherent reason behind the evolution law of ejector performance, only some simple qualitative or roundabout analysis. In this paper, a double-choking theory is proposed to provide an in-depth explanation of the evolution laws of ejector performance. The systematic investigation and quantitative analysis focus on the influences of various operatio ...
DOI:
10.1016/j.enconman.2020.112499

19. Experimental investigation on the hydrodynamic performance of a cylindrical dual-chamber Oscillating Water Column device

Author:
Ning, De-zhi; Zhou, Yu; Mayon, Robert; Johanning, Lars
Source:
Applied energy 2020 v.260 pp. 114252
ISSN:
0306-2619
Subject:
equipment performance,   etc   ; equipment design; hydrodynamics; water power;     Show all 4 Subjects
Abstract:
... The hydrodynamic performance of a stationary cylindrical dual-chamber Oscillating Water Column (OWC) wave energy device was experimentally studied to assess conversion efficiency in comparison with a single-chamber OWC. The contribution of the present work is to guide the design and optimization of the dual-chamber OWC device for efficiently capturing offshore wave energy. The effects of various p ...
DOI:
10.1016/j.apenergy.2019.114252

20. Functionalized Organic Material Platform for Realization of Ternary Logic Circuit

Author:
Jeon, Jaeho; Kim, Min Je; Shin, Gicheol; Lee, Myeongjae; Kim, Young Jae; Kim, BongSoo; Lee, Yoonmyung; Cho, Jeong Ho; Lee, Sungjoo
Source:
ACS applied materials & interfaces 2020 v.12 no.5 pp. 6119-6126
ISSN:
1944-8252
Subject:
equipment performance,   etc   ; electrons; equipment design; transistors;     Show all 4 Subjects
Abstract:
... Negative differential resistance/transconductance (NDR/NDT) has been attracting significant attention as a key functionality in the development of multivalued logic (MVL) systems that can overcome the limits of conventional binary logic devices. A high peak-to-valley current ratio (PVCR) and more than double-peak transfer characteristics are required to achieve a stable MVL operation. In this stud ...
DOI:
10.1021/acsami.9b18772