Results 1 to 10 of about 14,952,911 (382)

Equivalent relaxations of optimal power flow [PDF]

, 2014
Several convex relaxations of the optimal power flow (OPF) problem have recently been developed using both bus injection models and branch flow models.
Bose, Subhonmesh, Hassibi, Babak, Low, Steven H., Teeraratkul, Thanchanok   +3 more
core   +3 more sources

Experimental Study on the Effects of Hydrogen Injection Strategy on the Combustion and Emissions of a Hydrogen/Gasoline Dual Fuel SI Engine under Lean Burn Condition

Applied Sciences, 2022
Hydrogen addition can improve the performance and extend the lean burn limit of gasoline engines. Different hydrogen injection strategies lead to different types of hydrogen mixture distribution (HMD), which affects the engine performance. Therefore, the
Shiyi Pan, Jinhua Wang, Bin Liang, Hao Duan, Zuohua Huang   +4 more
doaj   +1 more source

DC Optimal Power Flow With Joint Chance Constraints [PDF]

IEEE Transactions on Power Systems, 2019
Managing uncertainty and variability in power injections has become a major concern for power system operators due to increasing levels of fluctuating renewable energy connected to the grid.
Alejandra Pena-Ordieres, D. Molzahn, Line A. Roald, A. Waechter   +3 more
semanticscholar   +1 more source

Influence of Refrigerant Charge Amount and EEV Opening on the Performance of a Transcritical CO2 Heat Pump Water Heater

Energies, 2017
Besides compressor rotary speed and parameters of water flowing through gas cooler and evaporator, refrigerant charge amount and electronic expansion valve (EEV) opening are two important parameters that have significant effects on the performance of a ...
Ze Zhang, Xiaojun Dong, Zheng Ren, Tianwei Lai, Yu Hou   +4 more
doaj   +1 more source

Theoretical Design and Analysis of the Waste Heat Recovery System of Turbine Exhaust Steam Using an Absorption Heat Pump for Heating Supply

Energies, 2020
In northern China, many thermal power plants use absorption heat pump to recover low-grade heat from turbine exhaust steam due to the irreplaceable advantages of the absorption heat pump in waste heat recovery.
Jinshi Wang, Weiqi Liu, Guangyao Liu, Weijia Sun, Gen Li, Binbin Qiu   +5 more
doaj   +1 more source

Convex Relaxations and Linear Approximation for Optimal Power Flow in Multiphase Radial Networks [PDF]

, 2014
Distribution networks are usually multiphase and radial. To facilitate power flow computation and optimization, two semidefinite programming (SDP) relaxations of the optimal power flow problem and a linear approximation of the power flow are proposed. We
Gan, Lingwen, Low, Steven H.
core   +2 more sources

Chance-Constrained AC Optimal Power Flow: A Polynomial Chaos Approach [PDF]

IEEE Transactions on Power Systems, 2019
As the share of renewables in the grid increases, the operation of power systems becomes more challenging. The present paper proposes a method to formulate and solve chance-constrained optimal power flow while explicitly considering the full nonlinear ac
T. Mühlpfordt, Line A. Roald, V. Hagenmeyer, T. Faulwasser, Sidhant Misra   +4 more
semanticscholar   +1 more source

Experimental and numerical investigation of two phase ejector performance with the water injected into the induced flow

International Journal of Advanced Nuclear Reactor Design and Technology, 2020
When injectors are used in petroleum industries or sea water desalination system, it is a special case that the induced gas is accompanied by water, the ejector is in two-phase operation. In the present study, the ejector performance at two phase flow is
WeiXiong Chen, ChenXi Huang, YuPing Bai, DaoTong Chong, JunJie Yan, JiPing Liu   +5 more
doaj   +1 more source

Investigations on affinity law under gas–liquid conditions in multistage radial and mixed-flow multiphase pumps [PDF]

International Journal of Fluid Engineering
Affinity laws have been widely used in pump design and simulation under high-temperature and corrosive conditions. By applying such laws, it is possible to shorten development cycles and reduce test costs.
Liang Chang, Chenyu Yang, Xiaobin Su, Xiaoyu Dai, Qiang Xu, Liejin Guo   +5 more
doaj   +1 more source

Numerical prediction of spatio-temporal frosting patterns of curved surface considering varying working parameters

Energy Storage and Saving, 2023
Accurate numerical prediction of frosting patterns is essential for the efficient layout and timing defrosting of heat exchangers under frosting conditions.
Xue Liu, Xiaojun Dong, Shaohang Yan, Yu Hou, Tianwei Lai   +4 more
doaj   +1 more source