Heliostat Field Design Using Visualization Method for Optical Heliostat Interaction

2011 ◽  
Author(s):  
Kei Ouchi ◽  
Hiroshi Kaneko ◽  
Yutaka Tamaura
Keyword(s):  
Approximation Method ◽  
Calculation Method ◽  
Power Loss ◽  
Visualization Method ◽  
Loss Distribution ◽  
Optical Interaction ◽  
Time Reduction ◽  
The Given

For the heliostat field design, the optical interaction of heliostat by shadowing and blocking should be considered besides cosine efficiency. In the present study, in order to visualize the optical interaction it is enabled to visualize the power loss image due to a poor heliostat layout. The optical interaction area among the two heliostats is calculated for several hundreds of pairs between the given heliostat and the surrounding heliostats which are virtually seated around the given heliostat. The resultant plot gives a power loss distribution around the given heliostat. An approximation method to calculate the heliostat distribution was applied for the visualization method for a remarkable time reduction for calculation. The magnitude of the interference can be seen easily from the area where the both borders of the optical interaction areas are overlapped. And the arrangement calculation method using the power loss distribution and the cosine efficiency distribution is proposed, which gives theoretically better heliostat field layouts.

Analytical PFC Boost Inductor Power Loss Calculation Method in CCM

2021 ◽  
Author(s):  
Piotr Szczerba ◽  
Slawomir Ligenza ◽  
Waldemar Raczko ◽  
Cezary Worek
Keyword(s):  
Calculation Method ◽  
Power Loss ◽  
Loss Calculation

scholarly journals Calculation of the thermal mode of the LED device

2019 ◽  
pp. 146-148
Author(s):  
Natalia Kulik ◽  
Jakov Danchenkov
Keyword(s):  
Calculation Method ◽  
Heat Removal ◽  
Light Sources ◽  
Thermal Mode ◽  
Led Light ◽  
Modern Methods ◽  
The Given

The problem of heat removal from the substrate of LED light sources is considered. Modern methods of cooling of LEDs are reviewed. The calculation method is given and the radiator area for passive heat removal is calculated. The radiator was selected according to the given criteria.

scholarly journals Raising Power Loss Equalizing Degree of Coil Array by Convex Quadratic Optimization Commutation for Magnetic Levitation Planar Motors

2018 ◽  
Vol 9 (1) ◽  
pp. 79 ◽  
Author(s):  
Shengguo Zhang ◽  
Jingtao Huang ◽  
Jingxian Yang
Keyword(s):  
Power Loss ◽  
Magnetic Levitation ◽  
Quadratic Function ◽  
Quadratic Optimization ◽  
Electromagnetic Forces ◽  
Loss Distribution ◽  
Coil Array ◽  
Boundary Constraints ◽  
Convex Quadratic Optimization ◽  
Global Power

This paper proposes a convex quadratic optimization commutation method to raise the equalization degree of power loss distribution of coil array for magnetic levitation planar motors. Starting with the modeling of electromagnetic forces/torques and commutation of coil array, the global power loss and the local power losses of coil array are analyzed, and the power loss equalizing degree is defined to evaluate the power loss distribution of coil array being commutated dynamically. Then, in consideration of the fact that the global power loss is the quadratic function of commutated coil currents, the convex quadratic function optimization with equality constraint and boundary constraints is applied to commutate the coil array, and the power loss equalizing degree is raised by decreasing the boundary constraints of optimization. Taking the magnetically levitated planar motor under investigation as examples and using quadprog routine in Matlab Optimization Toolbox, which is a dedicated quadratic optimization routine, it is verified that the power loss equalizing the degree of coil array is raised gradually and the power loss distribution of coil array becomes more uniform along with decrease of the boundary constraints. The convex quadratic optimization commutation is verified experimentally on a constructed multi-dimension force/torque measurement platform. Using the convex quadratic optimization commutation can not only improve the power loss distribution of coil array of magnetically levitated planar motors, but also make it possible to select lower capacity power amplifiers to produce the identical desired electromagnetic forces and torques.

scholarly journals Development of the computerized decision-making support system for the prevention and revealing of dangerous zones of flooding

2019 ◽  
Vol 97 ◽  
pp. 05040 ◽  
Author(s):  
Farrukh Shaazizov ◽  
Bakhtiyar Uralov ◽  
Elyor Shukurov ◽  
Aydar Nasrulin
Keyword(s):  
Cross Sections ◽  
Calculation Method ◽  
Visual Inspection ◽  
Wave Speed ◽  
Emergency Situation ◽  
Technical Condition ◽  
The Common ◽  
The Given ◽  
Modern Condition ◽  
Partial Destruction

In considered article the results are presented of the carried out researches on high-mountainous lakes of the Tashkent area. Visual inspection of a modern condition of natural dams of considered high-mountainous lakes of the Tashkent oblast is carried out. On the basis of the analysis of visual inspection it is possible to note, that the common technical condition of natural dams of the submitted high-mountainous lakes safe and does not represent danger to downstream situated territories. It was carried out the modeling of occurrence of emergency situation on high-mountainous lakes of the Tashkent oblast in case of full or partial destruction of natural dams. By an available calculation method of flooding waves are determined its key parameters, height of a wave, speed of distribution of a wave of break on the certain distances and reaching time the given wave up to the certain distances. On the basis of calculation method have been calculated and put on cross-sections of the rivers Pskem and Kocy zones of possible flooding in full and partial destruction of dams of high-mountainous lakes. Results of the carried out calculations have been put on the digital map, created on platform ArcView 3.2a.

scholarly journals On an Identification Problem on the Determination of the Parameters of the Dynamic System

2015 ◽  
Vol 2015 ◽  
pp. 1-8
Author(s):  
Dossan Baigereyev ◽  
Nevazi Ismailov ◽  
Yusif Gasimov ◽  
Atif Namazov
Keyword(s):  
Inverse Problem ◽  
Dynamic System ◽  
Calculation Method ◽  
Identification Problem ◽  
Quadratic Functional ◽  
Nonlinear Ordinary Differential Equations ◽  
Quasilinearization Method ◽  
The Right ◽  
The Given

An inverse problem is considered for the determination of the parameters, involved in the right-hand side of the system of nonlinear ordinary differential equations by given initial and final conditions. The solution of the problem is reduced to the minimization of the quadratic functional, which indeed is a deviation of the value of the solution from the given values at the end points. Using the quasilinearization method a calculation method is proposed to the solution of the considered problem. The application of this method is demonstrated on the example of the determination of the hydraulic resistance in the tubes.

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