Thermal Testing of Spacecraft Radioelectronic Equipment Operating in Brief Communication Sessions

Starch is used whenever there is a need for natural elastic properties combined with low cost of production. However, the hydrophilic properties in structural starch will decrease the thermal performance of formulated starch polymer. Therefore, the effect of glycerol, palm olein, and crude palm oil (CPO), as plasticizers, on the thermal behavior ofTacca leontopetaloidesstarch incorporated with natural rubber in biopolymer production was investigated in this paper. Four different formulations were performed and represented by TPE1, TPE2, TPE3, and TPE4. The compositions were produced by using two-roll mill compounding. The sheets obtained were cut into small sizes prior to thermal testing. The addition of glycerol shows higher enthalpy of diffusion in which made the material easily can be degraded, leaving to an amount of 6.6% of residue. Blending of CPO with starch (TPE3) had a higher thermal resistance towards high temperature up to 310°C and the thermal behavior of TPE2 only gave a moderate performance compared with other TPEs.

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Thermal Testing Methods for Solar Dryers

Solar Drying Technology - Green Energy and Technology ◽

10.1007/978-981-10-3833-4_7 ◽

2017 ◽

pp. 215-238

Author(s):

Shobhana Singh

Keyword(s):

Thermal Testing ◽

Testing Methods

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Built-in dynamic thermal testing technique for ICs

Electronics Letters ◽

10.1049/el:19961307 ◽

1996 ◽

Vol 32 (21) ◽

pp. 1982 ◽

Cited By ~ 4

Author(s):

J. Altet ◽

A. Rubio

Keyword(s):

Thermal Testing ◽

Testing Technique

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Thermal Performance of Sierpinski Carpet Fractal Fins in a Forced Convection Environment

Volume 8: Heat Transfer and Thermal Engineering ◽

10.1115/imece2016-67164 ◽

2016 ◽

Author(s):

David Calamas ◽

Daniel Dannelley ◽

Gyunay Keten

Keyword(s):

Heat Transfer ◽

Reynolds Number ◽

Forced Convection ◽

Thermal Performance ◽

Reynolds Numbers ◽

Unit Mass ◽

Thermal Testing ◽

Sierpinski Carpet ◽

Fractal Pattern ◽

Sierpiński Carpet

When certain fractal geometries are used in the design of fins or heat sinks the surface area available for heat transfer can be increased while system mass can be simultaneously decreased. The Sierpinski carpet fractal pattern, when utilized in the design of an extended surface, can provide more effective heat dissipation while simultaneously reducing mass. In order to assess the thermal performance of fractal fins for application in the thermal management of electronic devices an experimental investigation was performed. The first four fractal iterations of the Sierpinski carpet pattern, used in the design of extended surfaces, were examined in a forced convection environment. The thermal performance of the Sierpinski carpet fractal fins was quantified by the following performance metrics: efficiency, effectiveness, and effectiveness per unit mass. The fractal fins were experimentally examined in a thermal testing tunnel for a range of Reynolds numbers. As the Reynolds number increased, the fin efficiency, effectiveness and effectiveness per unit mass were found to decrease. However, as the Reynolds number increased the Nusselt number was found to similarly increase due to higher average heat transfer coefficients. The fourth iteration of the fractal pattern resulted in a 6.73% and 70.97% increase in fin effectiveness and fin effectiveness per unit mass when compared with the zeroth iteration for a Reynolds number of 6.5E3. However, the fourth iteration of the fractal pattern resulted in a 1.93% decrease in fin effectiveness and 57.09% increase in fin effectiveness per unit mass when compared with the zeroth iteration for a Reynolds number of 1.3E4. The contribution of thermal radiation to the rate of heat transfer was as high as 62.90% and 33.69% for Reynolds numbers of 6.5E3 and 1.3E4 respectively.

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