scholarly journals Demand uncertainty in modelling WDS: scaling laws and scenario generation

2016 ◽  
Author(s):  
R. Magini ◽  
F. Capannolo ◽  
E. Ridolfi ◽  
R. Guercio
Keyword(s):  
Demand Uncertainty ◽  
Scaling Laws ◽  
Scenario Generation

scholarly journals Water Demand Uncertainty: The Scaling Laws Approach

10.5772/51542 ◽  
2012 ◽  
Author(s):  
Ina Vertommen ◽  
Roberto Magini ◽  
Maria da Conceicao Cunha ◽  
Roberto Guercio
Keyword(s):  
Water Demand ◽  
Demand Uncertainty ◽  
Scaling Laws

scholarly journals Multi-Objective Optimization of a Microgrid Considering the Uncertainty of Supply and Demand

2021 ◽  
Vol 13 (3) ◽  
pp. 1320
Author(s):  
Shiping Geng ◽  
Gengqi Wu ◽  
Caixia Tan ◽  
Dongxiao Niu ◽  
Xiaopeng Guo
Keyword(s):  
Environmental Protection ◽  
Energy Demand ◽  
Demand Uncertainty ◽  
Flow Direction ◽  
Supply And Demand ◽  
Fuzzy Model ◽  
Copula Function ◽  
Scenario Generation ◽  
Particle Swarm Algorithm ◽  
Multi Objective

Starting from the perspective of the uncertainty of supply and demand, using the Copula function and fuzzy numbers a scenario generation method, considering the uncertainty of scenery, and a random fuzzy model of energy demand uncertainty are proposed. Then, through the energy flow direction and the energy supply, production, conversion, storage, and demand, a multi-objective model considering the economic and environmental protection of a park is constructed. Here, the park refers to a microgrid that gathers distributed energy such as wind and photovoltaics and has requirements for cooling, heat, and electricity at the same time. Next, combining the constraints of each link, the particle swarm algorithm is used to solve the model. Finally, an example is analyzed in a certain park. The results of the example show that, on the one hand, the proposed scenario generation method and fuzzy number method can reduce the uncertainty of supply and demand, effectively fitting the wind and photovoltaic output and various energy demands. On the other hand, considering the economy and environmental protection of the park at the same time, the configuration of energy storage equipment can not only improve the economy of the park, but also promote the consumption of renewable energy.

Siphon Flows in Stratified Coronal Loops

1994 ◽  
Vol 144 ◽  
pp. 185-187
Author(s):  
S. Orlando ◽  
G. Peres ◽  
S. Serio
Keyword(s):  
Heat Flux ◽  
Scaling Laws ◽  
Flow Model ◽  
Supersonic Flows ◽  
Coronal Loops ◽  
Characteristic Parameters

AbstractWe have developed a detailed siphon flow model for coronal loops. We find scaling laws relating the characteristic parameters of the loop, explore systematically the space of solutions and show that supersonic flows are impossible for realistic values of heat flux at the base of the upflowing leg.

Automatic Scenario Generation Through Procedural Modeling for Scenario-Based Training

2009 ◽  
Author(s):  
Glenn Martin ◽  
Sae Schatz ◽  
Clint Bowers ◽  
Charles E. Hughes ◽  
Jennifer Fowlkes ◽  
...  
Keyword(s):  
Scenario Generation ◽  
Procedural Modeling

Equilibrium scaling laws for layered spin glasses

1993 ◽  
Vol 3 (10) ◽  
pp. 2041-2062 ◽  
Author(s):  
M. J. Thill ◽  
H. J. Hilhorst
Keyword(s):  
Spin Glasses ◽  
Scaling Laws ◽  
Layered Spin

Analysis of shear bands in slow granular flows using a frictional Cosserat model

2000 ◽  
Vol 627 ◽  
Author(s):  
Prabhu R. Nott ◽  
K. Kesava Rao ◽  
L. Srinivasa Mohan
Keyword(s):  
Scaling Laws ◽  
Shear Bands ◽  
Shear Layers ◽  
Theoretical Description ◽  
Field Variable ◽  
Cosserat Continuum ◽  
Momentum Balance ◽  
Rigid Plastic ◽  
Independent Field ◽  
Cosserat Model

ABSTRACTThe slow flow of granular materials is often marked by the existence of narrow shear layers, adjacent to large regions that suffer little or no deformation. This behaviour, in the regime where shear stress is generated primarily by the frictional interactions between grains, has so far eluded theoretical description. In this paper, we present a rigid-plastic frictional Cosserat model that captures thin shear layers by incorporating a microscopic length scale. We treat the granular medium as a Cosserat continuum, which allows the existence of localised couple stresses and, therefore, the possibility of an asymmetric stress tensor. In addition, the local rotation is an independent field variable and is not necessarily equal to the vorticity. The angular momentum balance, which is implicitly satisfied for a classical continuum, must now be solved in conjunction with the linear momentum balances. We extend the critical state model, used in soil plasticity, for a Cosserat continuum and obtain predictions for flow in plane and cylindrical Couette devices. The velocity profile predicted by our model is in qualitative agreement with available experimental data. In addition, our model can predict scaling laws for the shear layer thickness as a function of the Couette gap, which must be verified in future experiments. Most significantly, our model can determine the velocity field in viscometric flows, which classical plasticity-based model cannot.

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