Lumped Approach to a Multi-Period–Multi-Reservoir Cyclic Storage System Optimization

2008 ◽  
Vol 22 (12) ◽  
pp. 1741-1760 ◽  
Author(s):  
Abbas Afshar ◽  
Leila Ostadrahimi ◽  
Abdollah Ardeshir ◽  
Saeed Alimohammadi
Keyword(s):  
Storage System ◽  
System Optimization ◽  
Cyclic Storage

Study on Optimization of Pressure Ratio Distribution in Multistage Compressed Air Energy Storage System

2018 ◽  
Author(s):  
Shang Chen ◽  
Tong Zhu ◽  
Huayu Zhang
Keyword(s):  
Energy Efficiency ◽  
Energy Storage ◽  
Pressure Ratio ◽  
Storage System ◽  
System Optimization ◽  
Energy Storage System ◽  
Compressed Air ◽  
System Efficiency ◽  
Compressed Air Energy Storage ◽  
Ratio Distribution

Compressed air energy storage is an effective energy storage technology to solve the instability of wind power in distributed energy resources. In this paper, a multistage compressed air energy storage system optimization model is constructed based on the energy conservation equation. Then the system is optimized by differential evolution to improve the system efficiency. Optimal pressure ratios are proposed to distribute the pressures of compressors and expanders. The impact of pressure ratio distribution curve on the system energy efficiency suggests that the change curve of the characteristics vary in different heat exchanger performance. Results show that the change of thermal transfer reactor performance leads to the variety of optimal distribution pressure ratio and energy efficiency of the system. In addition, the differential ratio distribution factor can be effective on the pressure ratio of reasonable allocation. System efficiency optimization results increased by about 1% compared mean value.

A PCM/Forced Convection Conjugate Transient Analysis of Energy Storage Systems With Annular and Countercurrent Flows

1991 ◽  
Vol 113 (1) ◽  
pp. 37-42 ◽  
Author(s):  
Y. Cao ◽  
A. Faghri ◽  
A. Juhasz
Keyword(s):  
Energy Storage ◽  
Storage Systems ◽  
Storage System ◽  
System Optimization ◽  
Conjugate Problem ◽  
Heat Energy ◽  
Energy Storage Systems ◽  
Space Applications ◽  
Power Load ◽  
Short Period

Latent heat energy storage systems with both annular and countercurrent flows are modeled numerically. The change of phase of the phase-change material (PCM) and the transient forced convective heat transfer for the transfer fluid are solved simultaneously as a conjugate problem. A parametric study and a system optimization are conducted. It is found that the energy storage system with the counter-current flow is an efficient way to absorb heat energy in a short period for pulsed power load space applications.

scholarly journals An object-oriented development environment to optimally design cyclic storage systems

2015 ◽  
Vol 17 (4) ◽  
pp. 534-550
Author(s):  
Mohammadamin Jahanpour ◽  
Abbas Afshar ◽  
Samuel Sandoval Solis
Keyword(s):  
Large Scale ◽  
Pareto Front ◽  
Storage System ◽  
Object Oriented ◽  
Design Parameters ◽  
Objective Functions ◽  
Development Environment ◽  
Nsga Ii ◽  
Cyclic Storage ◽  
Development Alternatives

Cyclic storage system (CSS) is defined as physically interconnected and operationally integrated surface water and groundwater subsystems with full direct interactions between the subsystems. Mathematical development and implementation of a CSS model is very complex and all previous works are fully case dependent with a minimum possibility of generalization. This article proposes an integrated development environment called CSSDev, which assists researchers to create and design object-oriented CSS models more easily. Using CSSDev, researchers may skip regeneration of repetitive simulation codes for common elements of a CSS. CSSDev employs NSGA-II to optimally select the design parameters of the models. Two objective functions of the optimization problem are system's total costs and total loss associated with the development alternatives. A real-world large-scale CSS has been modeled and optimized to illustrate the performance of CSSDev. The final Pareto-front is presented and two selected solutions from the set of optimal non-dominated ones are evaluated and discussed.

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