scholarly journals Development and Application of a New High-Efficiency Sparse Linear System Solver in the Thermal-Hydraulic System Analysis Code

2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Li Ge ◽  
Wei Liu ◽  
Jianqiang Shan
Keyword(s):  
Linear System ◽  
Hydraulic System ◽  
Large Scale ◽  
System Analysis ◽  
High Efficiency ◽  
Oriented Graph ◽  
Lu Factorization ◽  
Analysis Program ◽  
Lower Upper ◽  
Sparse Linear System

This paper presents a faster solver named NRLU (Node Reordering Lower Upper) factorization solver to improve the solution speed for the pressure equations, which are formed by RELAP5/MOD3.3. The NRLU solver uses the oriented graph method and minimal fill-ins rule to reorder the structure of the nonsymmetry sparse pressure matrix. It solves the pressure matrix by LU factorization. Then the solver is embedded into the large scale advanced thermal-hydraulic system analysis program RELAP5/MOD3.3. The comparisons of the original solver and the NRLU solver show that the NRLU solver is faster than the original solver in RELAP5/MOD3.3, and the rate enhancement can be 44.44%. The results also show that the NRLU solver can reduce the number of fill-ins effectively. This can improve the calculation speed.

Key Technology of Hydraulic System Design of Large-Scale Blow Molding Machine

2015 ◽  
Vol 713-715 ◽  
pp. 118-121
Author(s):  
You Wei Chen
Keyword(s):  
Hydraulic System ◽  
Energy Demand ◽  
Large Scale ◽  
High Efficiency ◽  
High Energy ◽  
Key Technology ◽  
Simulation And Optimization ◽  
Blow Molding ◽  
Flow Demand ◽  
The Impact

This paper carries on the simulation and optimization of hydraulic system, which focuses on the high energy consumption problem of large-scale blow molding machines. According to the characteristics of long work period and great fluctuation of flow demand, the paper designs the oil supplying system that can match the actuators’ hydraulic energy demand, introduces the working process of each component in the system, and analyzes the key technology of hydraulic system as well. The design and research avoids the shortcomings such as more components, complex debugging, discontinuous control and unstable operation, substantially reduces the installed capacity of variable pump and driving motor, and in the meantime, solves the impact problem of actuators effectively, which can make hydraulic system high efficiency, energy saving and run steadily.

Discussion and closure of "Design of generic direct sparse linear system solver in C++ for power system analysis"

2002 ◽  
Vol 17 (3) ◽  
pp. 926-928 ◽  
Author(s):  
Wilsun Xu ◽  
M.N. Agostini ◽  
I.C. Decker ◽  
A.S. e Silva ◽  
S. Pandit ◽  
...  
Keyword(s):  
Linear System ◽  
Power System ◽  
System Analysis ◽  
Power System Analysis ◽  
Sparse Linear System

Research of Control System of the Large-Scale Blow Molding Machine

2015 ◽  
Vol 713-715 ◽  
pp. 764-767
Author(s):  
Lin Qiu
Keyword(s):  
Hydraulic System ◽  
Energy Demand ◽  
Large Scale ◽  
High Efficiency ◽  
High Energy ◽  
Molding Machine ◽  
Molding Process ◽  
Simulation And Optimization ◽  
Blow Molding ◽  
The Impact

Through the analysis of molding process of large-scale plastic hollow containers, this paper carries on the simulation and optimization of hydraulic system, which focuses on the high energy consumption problem of large-scale blow molding machine. According to the characteristics of long work period and great fluctuation of flow demand, the paper designs the oil supplying system that can match the actuators’ hydraulic energy demand, introduces the working process of each component in the system, and analyzes the key technology of hydraulic system as well. The design and research avoids the shortcomings such as more components, complex debugging, discontinuous control and unstable operation, substantially reduces the installed capacity of variable pump and driving motor, and in the meantime, solves the impact problem of actuators effectively, which can make hydraulic system high efficiency, energy saving and run steadily.

scholarly journals Improving the energy efficiency of sparse linear system solvers on multicore and manycore systems

2014 ◽  
Vol 372 (2018) ◽  
pp. 20130279 ◽  
Author(s):  
H. Anzt ◽  
E. S. Quintana-Ortí
Keyword(s):  
Energy Efficiency ◽  
Linear System ◽  
Large Scale ◽  
Energy Performance ◽  
Current Status ◽  
Limiting Factor ◽  
Sparse Linear System ◽  
Sparse Linear Algebra ◽  
Hardware Architectures ◽  
Power And Energy

While most recent breakthroughs in scientific research rely on complex simulations carried out in large-scale supercomputers, the power draft and energy spent for this purpose is increasingly becoming a limiting factor to this trend. In this paper, we provide an overview of the current status in energy-efficient scientific computing by reviewing different technologies used to monitor power draft as well as power- and energy-saving mechanisms available in commodity hardware. For the particular domain of sparse linear algebra, we analyse the energy efficiency of a broad collection of hardware architectures and investigate how algorithmic and implementation modifications can improve the energy performance of sparse linear system solvers, without negatively impacting their performance.

The Potential of Photoelectrochemical Carbon Sinks

2018 ◽  
Author(s):  
Matthias May ◽  
Kira Rehfeld
Keyword(s):  
Global Warming ◽  
High Temperature ◽  
Greenhouse Gas ◽  
Large Scale ◽  
High Efficiency ◽  
Carbon Sink ◽  
Solar Fuels ◽  
Negative Emissions ◽  
Viable Approach ◽  
Low Sensitivity

Greenhouse gas emissions must be cut to limit global warming to 1.5-2C above preindustrial levels. Yet the rate of decarbonisation is currently too low to achieve this. Policy-relevant scenarios therefore rely on the permanent removal of CO<sub>2</sub> from the atmosphere. However, none of the envisaged technologies has demonstrated scalability to the decarbonization targets for the year 2050. In this analysis, we show that artificial photosynthesis for CO<sub>2</sub> reduction may deliver an efficient large-scale carbon sink. This technology is mainly developed towards solar fuels and its potential for negative emissions has been largely overlooked. With high efficiency and low sensitivity to high temperature and illumination conditions, it could, if developed towards a mature technology, present a viable approach to fill the gap in the negative emissions budget.<br>

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