Results 11 to 20 of about 21,033 (238)
Experimental investigation on backflow of power-law fluids in planar fractures
Physics of Fluids, 2021 In hydrofracturing, we model the backflow of a non-Newtonian fluid in a single flat-walled fracture of planar geometry and support our conceptualization with laboratory experiments. We consider a power-law fluid, a spatially homogeneous fracture aperture, and its variation in time depending on the internal fluid pressure and the elastic relaxation of ...
A. Lenci +3 more
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Slip Backflow of Polymers in Elastic Fractures for Subsurface Heat Recovery
Energies, 2023 This research delves into the complexities of backflow phenomena in finite-length and flat-walled fractures with elastic walls, specifically focusing on power-law fluids, whose shear-thinning behavior distinguishes them from Newtonian fluids.
Alessandro Lenci +3 more
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Model predictive control for DAB under extended‐phase‐shift considering components uncertainty
IET Power Electronics, 2023 For the dual active bridge (DAB) DC‐DC converters, parameter uncertainty (circuit parameters, input and/or load perturbations) affect their performance, such as the dynamic performance and backflow power.
Yongsheng Fu +2 more
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IET Renewable Power Generation, 2021 LCL‐type resonant dual‐active‐bridge (LCL‐DAB) DC–DC converters have more significant advantages in eliminating backflow power and achieving higher voltage gain compared with traditional dual active bridge (DAB) DC–DC converters. Therefore, LCL‐DAB DC–DC
Xiaoqiang Li +4 more
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Applied Sciences, 2021 In this study, the entropy theory was used as the evaluation standard of energy dissipation, and the effect of backflow clearance (the gap between motor rotor and motor shell) on energy characteristics of a full tubular pump was investigated by 3D ...
Fan Meng, Yanjun Li, Ji Pei
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Applied Sciences, 2022 In vehicle-to-grid (V2G) applications, dual active bridge (DAB) converters are commonly used as the power interface because they offer high efficiency, galvanic isolation, and bidirectional power flow. For the DAB control strategy, phase-shift control is
Thanh Nhat Trung Tran +2 more
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Hu Y. S., Wei H. J., Yu B., Yang O. X., Wang J., Wu J. Research on the vapor injection of two-stage rotary compressor / trans. from Engl. M. A. Fedorova [PDF]
Омский научный вестник: Серия "Авиационно-ракетное и энергетическое машиностроение", 2021 In order to understand the vapor injection flow characteristics of two-stage rotary compressor in the course of compression, a mathematical model based on mass conservation equation, energy equation and thermodynamic identity was established and proved
M. A. Fedorova
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A predictive control method for reducing power backflow in DC/AC matrix converter
Journal of Physics: Conference Series, 2021 Abstract In recent years, DC/AC matrix converter with higher power density have become an attractive alternative to traditional voltage source converters. The traditional PI control has been employed to achieve accurate control, but its dynamic response and stability need to be improved.
Zhipeng Xia, Ping Jin, Ling Chang
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Energies, 2022 Modern low-voltage distribution systems necessitate solar photovoltaic (PV) penetration. One of the primary concerns with this grid-connected PV system is overloading due to reverse power flow, which degrades the life of distribution transformers.
Issah Babatunde Majeed, Nnamdi I. Nwulu
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Minimum Return Power Control for Three-Level Dual Active Hybrid Full-Bridge DC-DC Converters
Shanghai Jiaotong Daxue xuebao, 2023 Hybrid three-level full bridge (H-TLFB) DC-DC converters increase the input voltage range by introducing a three-level bridge arm. Aimed at the problems of large power return and high current stress in the traditional dual phase shift control, a minimum ...
TAO Haijun, ZHANG Jinsheng, XIAO Qunxing, ZHENG Zheng
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