INTRODUCTION Long time readers may recall that one answer to the question of how humidity changes the thermal conductivity of air is “Nothing to worry about” [1]. Generally, the effect of humidity on air properties is small enough that it can be neglected. However, at high ambient temperatures and low pressure, humidity effects may need to be addressed in applications such as … [Read more...]
Beat the Heat! Dissipation Solutions Using Active Thermal Management Systems
This article is a summary of a webinar presented by ACT at Thermal Live Fall Summit in 2023. Introduction to Active Thermal Management Systems In the realm of high power density systems, effective heat management is not just a necessity; it's a critical component of functionality and longevity. These systems, found in everything from advanced computing to industrial … [Read more...]
Calculation Corner: A Simple Method for Estimating Radiation Heat Transfer
This article describes a semi-empirical equation that can be used to assess radiation heat transfer in terms of an effective convection coefficient. The effective convection coefficient due to radiation is shown to be: Where temperatures are in °C and ε is the emissivity of the radiating surface. This equation is accurate to within ~10% over a temperature range of 0 - … [Read more...]
The Effect of Ambient Conditions on Local Climate Inside a Pump Electronics Enclosure
By: Parizad Shojaee Nasirabadi, Jesper H. Hattel INTRODUCTION Condensation and moisture related problems are the cause of failures in many cases and consequently serious concerns for reliability in electronics industry. Therefore, it is important to control the moisture content and the relative humidity (RH) inside electronics enclosures. Understanding the transport … [Read more...]
Epoxy Certified for UL 1203 Standard
UL 1203 certified epoxy for Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous Locations Underwriters Laboratories (UL) 1203 is defined as the “Standard for Explosion-Proof and Dust-Ignition-Proof Electrical Equipment for Use in Hazardous (Classified) Locations”. To certify an epoxy for the UL1203, sample castings are exposed to saturated vapors … [Read more...]
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