INTRODUCTION After a couple of decades in the industry, I have observed that a number of experienced engineers can be intimidated by the topic of statistics—these columns will attempt to reduce the level of intimidation. While I have been interested in statistics for a few decades now, I don’t claim to be an expert. I will do my best to get things as right as I can, as well as … [Read more...]
Duocel® Metal Foam Heat Exchangers
Introduction As power-component technology advances and smaller packaging is required, thermal-management issues threaten to limit the performance of devices. As power dissipation rises, the inability to cool them may force designers to de-rate the devices’ performance by reducing current or switching speed and/or employing higher-voltage devices that are less efficient and … [Read more...]
Increased System Performance in Mobile Electronics Using High Performance Insulation-Graphite Composites
ABSTRACT Graphite foils with ultra-high spreading capacity and insulation sheets with ultra-low thermal conductivity were combined in a thermally stressed Google Pixel 3XL (Pixel) to significantly increase steady-state system performance, while maintaining safe device touch (skin) temperatures (TS ), as compared to the out-of-the-box device configuration. Four unique thermal … [Read more...]
Is That Normal?
Introduction These columns on statistics began by describing the field of statistics as using the mathematical laws of probability to deal with data uncertainty [1]. Many statistical tools developed to apply probability do assume that data are drawn from a normally distributed population, in which the probability distribution function, f(x), of a population follows Equation … [Read more...]
Oscillating Heat Pipe Thermal Performance and Stability Limits
A heat pipe is a closed system that contains a saturated fluid. When heat is dissipated in one region of the heat pipe, liquid in that area boils or evaporates, which produces vapor that moves to another area in the heat pipe where it condenses. The condensed liquid then returns to its starting point to transport energy from the heat input region(s) to the heat output … [Read more...]
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