Results 11 to 20 of about 3,690,081 (295)

Thermodynamic Analysis of Air-Cycle Refrigeration Systems with Expansion Work Recovery for Compartment Air Conditioning

open access: yesApplied Sciences, 2022
As a requirement for sustainable development, air-cycle refrigeration has received wide attention as a candidate for environmentally friendly air conditioning technology.
Xiaoling Yang   +5 more
doaj   +1 more source

Power Flow Control by Unified Power Flow Controller

open access: yesMehran University Research Journal of Engineering and Technology, 2020
The demand of energy usage is increasing rapidly and to meet the energy requirements, best possible transmission systems should be adopted to avoid energy losses in our transmission systems. In Pakistan’s WAPDA (Water & Power Development Authority) system, the rapid increase in load and less generation capacity has increased load shedding thought ...
U. Khalil   +3 more
openaire   +3 more sources

An Experimental Study on the Combustion Characteristics of a Methane Diffusion Flame within a Confined Space under Sub-Atmospheric Pressure

open access: yesApplied Sciences, 2023
Gas-fired boilers, gas stoves, and wall-mounted gas boilers are the main consumers of gas fuel, but they generally encounter problems when operating at high altitudes, such as reduced thermal efficiency and increased pollutant emissions. Previous studies
Jingkun Zhang   +6 more
doaj   +1 more source

Experimental Study on Frost Crystal Morphologies and Frosting Characteristics under Different Working Pressures

open access: yesApplied Sciences, 2022
Frost usually grows on the cooling surface of heat transfer equipment, which often operates under different working pressures. In such conditions, one of the fundamental influencing factors of frosting, the diffusion coefficient of water vapor around the
Tianwei Lai   +5 more
doaj   +1 more source

Investigation on Spray Morphology, Droplet Dynamics, and Thermal Characteristics of Iso-Pentane Flashing Spray Based on OpenFOAM

open access: yesApplied Sciences, 2022
Leakage of high-pressure hydrocarbon liquid from a vessel or pipe may easily result in a two-phase flashing spray due to the rapid pressure drop, which might produce catastrophic consequences.
Dong-Qing Zhu   +5 more
doaj   +1 more source

Experimental Research on the Flow and Heat Transfer Characteristics of Subcritical and Supercritical Water in the Vertical Upward Smooth and Rifled Tubes

open access: yesEnergies, 2022
Experiments were conducted to investigate the heat transfer and flow characteristics of the vertical upward smooth and rifled tubes from subcritical to supercritical pressure. The distributions of wall temperature and heat transfer coefficient (HTC) were
Xiaocheng Du   +5 more
doaj   +1 more source

Scale Effect on Producing Gaseous and Liquid Chemical Fuels via CO2 Reduction

open access: yesEnergies, 2022
Producing chemical fuels from sunlight is a sustainable way to utilize solar energy and reduce carbon emissions. Within the current photovoltaic-electrolysis or photoelectrochemical-based solar fuel generation system, electrochemical CO2 reduction is the
Ya Liu   +5 more
doaj   +1 more source

Robust Power Flow and Three-Phase Power Flow Analyses [PDF]

open access: yesIEEE Transactions on Power Systems, 2019
Robust simulation is essential for reliable operation and planning of transmission and distribution power grids. At present, disparate methods exist for steady-state analysis of the transmission (power flow) and distribution power grid (three-phase power flow).
Amritanshu Pandey   +5 more
openaire   +2 more sources

Experimental study on multi-decked protuberant foil thrust bearing with different number of thrust pads

open access: yesJournal of Advanced Mechanical Design, Systems, and Manufacturing, 2016
Thrust bearing is an important component in high speed rotor bearing system. For the thrust bearing, the pad circumferential partition is recognized as an essential factor for the foil thrust bearing in hydrodynamic lubrication.
Tianwei LAI   +4 more
doaj   +1 more source

Recent Advances in Computational Methods for the Power Flow Equations [PDF]

open access: yes, 2015
The power flow equations are at the core of most of the computations for designing and operating electric power systems. The power flow equations are a system of multivariate nonlinear equations which relate the power injections and voltages in a power ...
Mehta, Dhagash   +2 more
core   +2 more sources

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