scholarly journals Dense Granular Flow as Heat Transfer Media: A New Type of High Power Target Design

2018 ◽  
Author(s):  
Xuezhi Zhang ◽  
Lei Yang
Keyword(s):  
Heat Transfer ◽  
High Power ◽  
Granular Flow ◽  
High Power Target ◽  
Dense Granular Flow ◽  
New Type ◽  
Target Design

Heat transfer performance testing of a new type of phase change heat sink for high power light emitting diode

2018 ◽  
Vol 25 (7) ◽  
pp. 1708-1716 ◽  
Author(s):  
Jian-hua Xiang ◽  
Chun-liang Zhang ◽  
Chao Zhou ◽  
Gui-yun Liu ◽  
Wei Zhou
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
High Power ◽  
Heat Sink ◽  
Heat Transfer Performance ◽  
Light Emitting Diode ◽  
Performance Testing ◽  
Transfer Performance ◽  
Light Emitting ◽  
New Type

Study on a Novel Separating Flat Heat Pipe Radiator

2011 ◽  
Vol 71-78 ◽  
pp. 2585-2588
Author(s):  
Jun Heng Du ◽  
Kun Feng Liang ◽  
Lin Wang
Keyword(s):  
Heat Transfer ◽  
Heat Pipe ◽  
High Power ◽  
Junction Temperature ◽  
Transfer Model ◽  
Temperature Uniformity ◽  
Coil Diameter ◽  
New Type ◽  
Heat Transfer System ◽  
Flat Heat Pipe

A novel separating flat heat pipe radiator was developed for high power rectification equipment，the physical and mathematic heat transfer model was built; The influences of the charging ratio, coil diameter and interbank combination on heat transfer limitation and temperature uniformity were researched; The characteristics of heat transfer system with four different kinds of interbank combinations between the new type of heat pipe and the common were analyzed . The results indicate that the heat transfer limitation and temperature uniformity of the new type of heat pipe can be improved when the charging ratio and the interbank combination were at the high-points. The charging ratio is in the range of 125%-175%，the interbank combination of the heat pipe heat sink is 4×10mm，the junction temperature of high power rectification equipment can be controlled steadily under 25°C for the heat load of 620W，and shall be very promising heat—transfer devices for controlling junction temperature of high power rectification equipment．

scholarly journals Numerical Simulation, Machining and Testing of a Phase Change Heat Sink for High Power LEDs

Materials ◽  
2019 ◽  
Vol 12 (13) ◽  
pp. 2193 ◽  
Author(s):  
Jianhua Xiang ◽  
Haoxing Zheng ◽  
Yipin Wang ◽  
Chunliang Zhang ◽  
Chao Zhou ◽  
...  
Keyword(s):  
Heat Transfer ◽  
Phase Change ◽  
High Power ◽  
Heat Sink ◽  
Heat Dissipation ◽  
Heat Transfer Performance ◽  
Machining Process ◽  
Normal Operation ◽  
Transfer Performance ◽  
New Type

Thermal management is crucial to guarantee the normal operation of light-emitting diodes (LEDs) Phase change heat sink is superior to traditional metal solid heat sink due to very small thermal resistance. In this study, a new type of phase change heat sink for high power LEDs is first designed. Then, the fabrication process of boiling structures at the evaporation surface of the phase change heat sink is discussed and analyzed. To make a comparison and deep discussion, the machining process is simulated through the FEM (finite element analysis) software, DEFORM-3D. Last but not least, heat transfer performance of the fabricated phase change heat sink is tested. Results have shown that the designed new type of phase change heat sink has superior heat transfer performance and is suitable for heat dissipation of high-power LEDs.

A Convex Complementarity Approach for Simulating Large Granular Flows

2010 ◽  
Vol 5 (3) ◽  
Author(s):  
Alessandro Tasora ◽  
Mihai Anitescu
Keyword(s):  
Granular Flow ◽  
Complementarity Problems ◽  
Particle Interaction ◽  
Granular Flows ◽  
Rigid Bodies ◽  
Integration Time ◽  
Frictional Contacts ◽  
Physical Experiments ◽  
Dense Granular Flow ◽  
Number Of Particles

Aiming at the simulation of dense granular flows, we propose and test a numerical method based on successive convex complementarity problems. This approach originates from a multibody description of the granular flow: all the particles are simulated as rigid bodies with arbitrary shapes and frictional contacts. Unlike the discrete element method (DEM), the proposed approach does not require small integration time steps typical of stiff particle interaction; this fact, together with the development of optimized algorithms that can run also on parallel computing architectures, allows an efficient application of the proposed methodology to granular flows with a large number of particles. We present an application to the analysis of the refueling flow in pebble-bed nuclear reactors. Extensive validation of our method against both DEM and physical experiments results indicates that essential collective characteristics of dense granular flow are accurately predicted.

Electron-beam valves (EBVs): a new type of high-power device

2000 ◽  
Author(s):  
Vladimir I. Perevodchikov ◽  
V. N. Shapenko ◽  
V. F. Martynov ◽  
P. M. Stalkov ◽  
A. L. Shapiro
Keyword(s):  
Electron Beam ◽  
High Power ◽  
Power Device ◽  
New Type

The Spallation Neutron Source High Power Target Station Moderator Performance: Calculations and Studies

2003 ◽  
Vol 11 (1-2) ◽  
pp. 83-91 ◽  
Author(s):  
E.B. Iverson ◽  
P.D. Ferguson ◽  
F.X. Gallmeier ◽  
B.D. Murphy
Keyword(s):  
Neutron Source ◽  
High Power ◽  
Spallation Neutron Source ◽  
Target Station ◽  
High Power Target

A Study on Process of Modular Li-Ion Power Batteries

2013 ◽  
Vol 273 ◽  
pp. 153-156
Author(s):  
Han Liang ◽  
Xiao Feng ◽  
Yuan An Li
Keyword(s):  
High Power ◽  
Internal Resistance ◽  
Power Battery ◽  
New Process ◽  
Good Consistency ◽  
New Type ◽  
Li Ion ◽  
Production Automation ◽  
The Way

Li-ion power battery which has a broad prospect of application in many industry fields is a new type of high power battery. The formation-testing and sorting-packing are necessary processes in battery manufacture. Currently the process of formation almost takes the way of monomer battery, then sorting and packing by measuring the parameters of its internal resistance, voltage and capacity. The operation is complicated and the amount of data is huge. On account of the problem, we propose a new process of battery modularization. It can greatly reduce the workload of the parameter testing when using the optimized process. And batteries can get a good consistency, which is favor of sorting-packing and production automation.

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