Design Optimization Method and Application of High-Efficiency and Variable-Pitch Axial Flow Fan by Lee Chan, Yang Sang Ho, Lee Sang Yeol

“…This paper describes servo motor–driven variable-pitch axial flow fan, and its optimal design method, process and application results for improving the efficiency of the variable-pitch fan. …”
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Influence of Different Climatic Regions on the Energy Efficiency Standard Index of Variable Refrigerant Flow System by Chen Huanxin, Zeng Yuke, Cheng Jianhong, Shao Shuangquan, Zhang Jianqiang, Chen Jin, Zhang Menghua

Subjects: “…variable refrigerant flow system…”
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Control of Electric Drives in the Best Efficiency Region of Pumping System by Bakman Ilja

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Research on Variable Circulation Design Method and Internal Flow Characteristic of the Axial Flow Pump by Xuewei Yu, Qili Gan, Zifan Ling, Jiahui Gong, Jiajia Tang, Lijian Shi

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An Improved Design of a Continuously Variable Transmission Based on Circumferentially Arranged Disks for Enhanced Efficiency in the Low Torque Region by Muhammad Bilal, Qidan Zhu, Shafiq R. Qureshi, Ghulam Farid, Ahsan Elahi, Muhammad Kashif Nadeem, Sartaj Khan

“…A continuously variable transmission can improve the energy efficiency of actuators with rotary output by providing an optimum transmission ratio. …”
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TECHNICAL PERFORMANCE ESTIMATION METHOD FOR GAS TURBINES WITH VARIABLE FLOW PATH GEOMETRY by Yu. M. Brodov, O. V. Komarov, V. L. Blinov, V. A. Sedunin, A. V. Skorohodov, E. P. Sozonov

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Analysis of village fund efficiency and the variables affecting it in Indonesia by Sutikno, Zulkefly Abdul Karim, Alifah Rokhmah Idialis

“…The purpose of this study is to evaluate the level of efficiency of village fund use and analyze the variables that influence it. …”
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Optimizing Energy Efficiency and Sustainability in Winter Climate Control: Innovative Use of Variable Refrigerant Flow (VRF) Systems in University Buildings by Yolanda Arroyo Gómez, Julio F. San José-Alonso, Luis J. San José-Gallego, Javier M. Rey-Hernández, Ascensión Sanz-Tejedor, Francisco J. Rey-Martínez

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Evaluating the efficiency of a parcel locker network: a case study of variable demand and storage duration in Pardubice city by Stefan Jovčić, Libor Bauer

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Impact of fragment size variability on excavator efficiency in mining operations by M.V. Kachurovskyi, V.O. Sokolovskyi

“…The study highlights the importance of reducing the variability in fragment sizes to improve the efficiency of excavators. …”
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Poplar transformation with variable explant sources to maximize transformation efficiency by Haiwei Lu, Sara Jawdy, Jin-Gui Chen, Xiaohan Yang, Udaya C. Kalluri

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Study of High Efficiency Flow Regulation of VIGV in Centrifugal Compressor by Chunjun Ji, Qi Sun, Zhaoyang Fan, Yawei Gao, Baode Zhao

“…Variable inlet guide vane (VIGV) is used to control the mass flow and generate prewhirl in centrifugal compressors. …”
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Efficient continuous-flow separation and purification processes of 5-hydroxymethylfurfural by Tiprawee Tongtummachat, Kritsanalak Thongkan, Watsamon Chuphueak, Attasak Jaree, Nattee Akkarawatkhoosith

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Efficient and variable viscosity fracturing fluid of deep coal rock gas and popularization in ultimate volume fracturing by Bo LIN, Shuai CHEN, Xiangyang YAN, Mengqi CHEN, Liangjun DU, Heng CHEN, Hongsheng LU, Shuai SUN

“…By taking the advantage of SFY-2, a efficient and variable viscosity fracturing fluid is constructed to fit the design idea of coal rock gas Ultimate volume Fracturing, the variable viscosity control scheme is formulated and the construction technology is optimizated to achieve the goal of “Breaking” the coal rock sufficiently, creating complex sewing nets, filling sands fully and supporting effective. …”
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Energy efficiency and length modification of stilling basins with variable Baffle and chute block designs: A case study of the Fewa hydroelectric project by Dahal Vishan, Kunwar Subash, Regmi Ram Krishna, Neupane Shrawan

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Thrust-efficiency limits of a swimming tail with variable chordwise flexural rigidity by Hossam Alqaleiby, Muhammad R. Hajj

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Adaptation of potato cultivars to phosphorus variability and enhancement of phosphorus efficiency by Bacillus subtilis by Leangsrun Chea, Mohammad Alhussein, Petr Karlovsky, Elke Pawelzik, Marcel Naumann

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Efficiency problems of high-voltage variable frequency drives of the mcp of npp with wwer by V. A. Khrustalev, D. O. Bashlykov, M. V. Garievsky

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Performance Analysis of a Reciprocating Refrigeration Compressor Under Variable Operating Speeds by Willian T. F. D. da Silva, Vitor M. Braga, Cesar J. Deschamps

“…Results reveal that neither volumetric nor exergy efficiency varies monotonically with compressor speed. …”
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Experimental Investigation of the Transmission Efficiency of In-line Low Pulse Pulsing CVT by Zheng Zongxi, Liu Kaichang

“…An experimental prototype of in- line,low pulse pulsing continuously variable transmission（ CVT） is designed and manufactured,its basic structure and working principle are introduced in detail. …”
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