Results 11 to 20 of about 1,340,613 (267)

Assessment Method of Comprehensive Energy Saving Potential of Distribution Network Considering Source-load Power Uncertainty

Zhongguo dianli, 2022
In order to effectively evaluate the energy-saving potential of active distribution network, the evaluation method of energy-saving transformation scheme of distribution network is studied.The K-means clus-tering method is employed to extract typical ...
Zuoxiang YANG, Jingjing WANG, Jiang WU, Shasha TANG, Bin HOU   +4 more
doaj   +2 more sources

Systematic Method for the Energy-Saving Potential Calculation of Air-Conditioning Systems via Data Mining. Part I: Methodology

Energies, 2020
Air-conditioning systems contribute the most to energy consumption among building equipment. Hence, energy saving for air-conditioning systems would be the essence of reducing building energy consumption.
Rongjiang Ma, Shen Yang, Xianlin Wang, Xi-Cheng Wang, Ming Shan, Nanyang Yu, Xudong Yang   +6 more
doaj   +2 more sources

Analytical Model of Gear Thermal Stiffness Based on the Potential Energy Method

Applied Sciences, 2023
Stiffness is the main internal excitation of gear system vibration and is the basis for studying the static and dynamic characteristics of the system. Based on the relationship between thermal stress and strain in plane strain theory and combined with ...
Yanbing He, Haibo Yang
doaj   +1 more source

Revisiting the potential of pumped-hydro energy storage: A method to detect economically attractive sites [PDF]

, 2021
This study innovatively combines a set of methods to provide a new way to assess the economic potential of pumped hydro energy storage. It first provides a method based on geographic information systems to study the potential of pumped-hydro for ...
Haas, Jannik, Breyer, Christian, Ghorbani, Narges, Prieto-Miranda, Luis   +3 more
core   +1 more source

Forecasting method of clean energy development potential considering sector coupling [PDF]

E3S Web of Conferences, 2021
Sector coupling includes not only the coupling within energy sectors such as electricity, heat and gas, but also the coupling between energy sector and transportation sector, construction sector and industrial sector. This article introduces a method for
Zhu Yu, Shen Weijie, Zhang Changhao, Ge Yangyang, Cai Danting   +4 more
doaj   +1 more source

Mesh stiffness calculation and vibration analysis of the spur gear pair with tooth crack, considering the misalignment between the base and root circles

International Journal of Mechanical System Dynamics, 2021
An improved variable cross‐section cantilever beam model for evaluating the time‐varying mesh stiffness (TVMS) of the perfect gear tooth is developed in which the tooth number of driving gear is less than 42 and that of driven is more than 42.
Jingyu Hou, Shaopu Yang, Qiang Li, Yongqiang Liu, Jiujian Wang   +4 more
doaj   +1 more source

Investigation on Dynamic Characteristics of Spur Gear Transmission System with Crack Fault

Machines, 2022
To study the dynamic characteristics of spur gears with crack faults, it is essential to establish the meshing stiffness model accurately. In this paper, the time-varying meshing stiffness (TVMS) model and load-sharing ratio (LSR) model of spur gears ...
Fei Ren, Dexi Wang, Guiqin Shi, Xiaoling Wu   +3 more
doaj   +1 more source

Study on the method of analyzing the time-variant internal mesh stiffness of helical gears considering the flexibility of the gear ring

Journal of Advanced Mechanical Design, Systems, and Manufacturing, 2023
In a 9-speed transmission, as a key participant of a planetary wheel system, the gear ring will be subjected to elastic deformation as a result of the meshing action, affecting the smoothness of the transmission.
Shi WU, Yiyang ZHOU, Chengrui ZHAO, Tiantian XU   +3 more
doaj   +1 more source

Variational Methods for Atoms and the Virial Theorem

Atoms, 2022
In the case of the one-electron Dirac equation with a point nucleus, the virial theorem (VT) states that the ratio of the kinetic energy to potential energy is exactly −1, a ratio that can be an independent test of the accuracy of a computed solution ...
Charlotte Froese Fischer, Michel Godefroid   +1 more
doaj   +1 more source

Analysis of Kinetic Energy Recovery Systems in Electric Vehicles

Vehicles, 2023
The recovery of kinetic energy (KER) in electric vehicles was analyzed and characterized. Two main systems were studied: the use of regenerative brakes, and the conversion of potential energy.
Carlos Armenta-Déu, Hernán Cortés
doaj   +1 more source