A microstructural study of carbon fibers for thermal management and space applications

1996 ◽  
Author(s):  
David P. Anderson ◽  
Allan S. Crasto
Keyword(s):  
Thermal Management ◽  
Carbon Fibers ◽  
Space Applications ◽  
Microstructural Study

Parametric Analysis of a Thermally Actuated Cooling System for Space Applications

2000 ◽  
Author(s):  
K. Freudenberg ◽  
W. E. Lear ◽  
S. A. Sherif
Keyword(s):  
Thermal Management ◽  
Parametric Analysis ◽  
Cooling System ◽  
Space Applications ◽  
Development Stages ◽  
Prototype Development ◽  
Design Cycle ◽  
Subsystem Design ◽  
Design Requirements ◽  
Thermally Actuated

Abstract Integration of new and existing technologies for thermal management will be required to meet the challenges associated with the increased need for an efficient, lightweight, heat rejection system. Subsystem design requirements, such as thermal and mass management, must be brought into me design cycle to establish an optimal configuration. This paper provides a parametric analysis that determines a range of parameters under which a proposed system becomes viable from a weight management standpoint. The analysis can be applied to essentially any space-operated thermally-actuated heat pump with power and refrigeration subsystems. By applying the techniques demonstrated in this paper, designers can identify and optimize conceptual configurations during the initial prototype development stages to reduce payload weight and increase financial savings.

Innovative packaging solution for power and thermal management of wide-bandgap semiconductor devices in space applications

2008 ◽  
Vol 62 (6-7) ◽  
pp. 422-430 ◽  
Author(s):  
J. Barcena ◽  
J. Maudes ◽  
M. Vellvehi ◽  
X. Jorda ◽  
I. Obieta ◽  
...  
Keyword(s):  
Thermal Management ◽  
Semiconductor Devices ◽  
Wide Bandgap ◽  
Space Applications ◽  
Wide Bandgap Semiconductor

scholarly journals Thermal diode based on a multilayer structure of phase change materials

2021 ◽  
Vol 2116 (1) ◽  
pp. 012115
Author(s):  
T Swoboda ◽  
K Klinar ◽  
A Kitanovski ◽  
M Muñoz Rojo
Keyword(s):  
Phase Change ◽  
Thermal Management ◽  
Multilayer Structure ◽  
Phase Change Materials ◽  
Rectification Ratio ◽  
Optimum Conditions ◽  
Space Applications ◽  
Thermal Rectification ◽  
Management Capability ◽  
The Impact

Abstract Thermal diodes are devices that allow heat to flow preferentially in one direction. This unique thermal management capability has attracted attention in various applications, like electronics, sensors, energy conversion or space applications, among others. Despite their interest, the development of efficient thermal diodes remains still a challenge. In this paper, we report a scalable and adjustable thermal diode based on a multilayer structure that consists of a combination of phase change and phase invariant materials. We applied a parametric sweep in order to find the optimum conditions to maximize the thermal rectification ratio. Our simulations predicted a maximum thermal rectification ratio of ~20%. To evaluate the impact of these devices in real applications, we theoretically analysed the performance of a magnetocaloric refrigerating device that integrates this thermal diode. The results showed a 0.18 K temperature span between the heat source and the heat sink at an operating frequency of 25 Hz.

Processing-Microstructure-Tensile Property of Vapor Grown Carbon Fiber Reinforced Carbon Composite

1995 ◽  
Vol 383 ◽  
Author(s):  
Jyh-Ming Ting
Keyword(s):  
Mechanical Properties ◽  
Thermal Conductivity ◽  
Carbon Fiber ◽  
Physical Properties ◽  
Tensile Properties ◽  
Gas Phase ◽  
Thermal Management ◽  
Carbon Fibers ◽  
Carbon Composite ◽  
Carbon Composites

ABSTRACTIn contrast to the form in which other carbon fibers are produced, vapor grown carbon fiber (VGCF) is produced from gas phase precursors in the form of individual fibers of discrete lengths. VGCF can be harvested as a mat of semi-aligned, semicontinuous fibers, with occasional fiber branching and curling. The use of VGCF mats as reinforcement result in composites which exhibit unique microstructure and physical properties that are not observed in other types of carbon composites. This paper describes the processing of VGCF mats reinforced carbon composites, and its unique microstructure and properties. Utilization of fiber tensile properties, as well as thermal conductivity, in the composites is discussed. Comparison of experimental results from various VGCF composites to theory indicates that mechanical properties are more strongly affected by characteristics of VGCF mat than are thermal conductivity. The implications of this relationship favors applications for thermal management where structural demands are less stringent.

Thermal management analysis of a Li-ion battery cell using phase change material loaded with carbon fibers

Energy ◽  
2016 ◽  
Vol 96 ◽  
pp. 355-371 ◽  
Author(s):  
Fereshteh Samimi ◽  
Aziz Babapoor ◽  
Mohammadmehdi Azizi ◽  
Gholamreza Karimi
Keyword(s):  
Phase Change ◽  
Phase Change Material ◽  
Thermal Management ◽  
Carbon Fibers ◽  
Li Ion Battery ◽  
Battery Cell ◽  
Li Ion ◽  
Change Material

Composites based on thermally hyper-conductive vapor grown carbon fiber

1995 ◽  
Vol 10 (6) ◽  
pp. 1478-1484 ◽  
Author(s):  
Jyh-Ming Ting ◽  
Max L. Lake ◽  
David R. Duffy
Keyword(s):  
Thermal Conductivity ◽  
Carbon Fiber ◽  
Thermal Management ◽  
Carbon Fibers ◽  
Electronic Devices ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Carbon Composites ◽  
Matrix Composites ◽  
A Value

Aluminum matrix composites and carbon/carbon composites based on vapor grown carbon fiber (VGCF) were fabricated for analysis of thermophysical properties. Due to the highly graphitic nature of VGCF, the resulting composites exhibit values of thermal conductivity that have not been achieved by using any other carbon fibers, and thus represent new materials for thermal management in applications such as packaging for high-power, high-density electronic devices. In the aluminum matrix VGCF composites, a thermal conductivity of 642 W/m-K was obtained by using a VGCF loading of only 36.5 vol.%. For VGCF/C composites, thermal conductivity of 910 W/m-K has been observed, a value which is more than a factor of two higher than that of copper. Based on the observed thermal conductivity of VGCF/Al composites and VGCF/C composites, the room temperature thermal conductivity of VGCF in the composite was calculated to be 1460 W/m-K and 1600 W/m-K, respectively.

Thermal Management of Electronic Packages for Space Applications

1990 ◽  
Vol 11 (3) ◽  
pp. 27-44 ◽  
Author(s):  
K. N. SHUKLA ◽  
M. J. CHACKO ◽  
LEELAMMA MANI
Keyword(s):  
Thermal Management ◽  
Electronic Packages ◽  
Space Applications

Mass-Based Optimization of Thermal Management and Power Systems for Space Applications

2002 ◽  
Vol 18 (6) ◽  
pp. 1161-1169 ◽  
Author(s):  
K. D. Freudenberg ◽  
W. E. Lear ◽  
S. A. Sherif ◽  
E. L. Golliher
Keyword(s):  
Power Systems ◽  
Thermal Management ◽  
Space Applications
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