Do not just calculate the heat!

 


Comments

Post a Comment

Popular posts from this blog

The Illusion of 'Magic' Thermal Coatings: A 4-Month Engineering Lesson

Image
A technical infographic explaining why a black heat dissipation coating works via radiation in still air (natural convection) but loses all its advantage under fan airflow (forced convection) inside a wind tunnel testing setup.   Introduction: A Call from a Hopeful Startup CEO About ten years ago, around May, I received a phone call that led to a profound engineering lesson. A CEO running a tech startup wanted to meet me. He had developed what he called a revolutionary "Heat Dissipation Coating" liquid and was actively marketing it for electronics. He sought me out because he knew I was managing various thermal management projects and held an extensive network with major Korean electronics companies like Samsung and LG, as well as solid mid-sized firms. His pitch was seductive: it was a special coating that could be applied to any surface to instantly drop its operating temperature. To prove his point, he explained that they were already supplying this black coating to a maj...
Read more

Are You Practicing 'Thermal Design' or Just 'Thermal Countermeasure'?

Image
  Are You Practicing 'Thermal Design' or Just 'Thermal Countermeasure'? When many engineers join a project for a new electronic product, they start with the exciting imagination of creating a device with "wonderful new features." The next steps are usually predictable: design the circuit to implement those ideas and build a prototype. Turn the power on. Once the device works, only then do they grab a thermometer and start measuring temperatures inside the device. If the temperature of a specific component goes over the limit and overheats, what do they do? Then, and only then, they rush to drill holes (vents) in the case, or try to squeeze a fan wherever there is empty space. Surprisingly, this is how many product development sites still operate. Have you ever seen a product at an electronics store with a fan in a bizarre spot that doesn't match the design at all, or vents in illogical places? Those are the traces of last-minute additions in development. T...
Read more

The Invisible Heat Transfer: Mastering Thermal Radiation for Optimal Cooling

Image
A technical infographic visualizing the quiet battle between Natural Convection (slow blue flow) and Thermal Radiation (intense red waves) on the back of a fanless smartphone, showing how Forced Convection (fast sapphire flow) takes over when a cooler fan is attached. The Invisible Force: Demystifying Thermal Radiation In the world of thermal engineering, radiation is often the most challenging concept to grasp. Unlike Conduction , which we feel through touch, or Convection , which we experience through the movement of fluids like air or water, Radiation is the direct transfer of thermal energy without a medium. Think of a winter camping trip. As you sit in front of a roaring campfire, your hands are warmed almost instantly. Yet, if you move just a few inches to the side, the air remains freezing. This is because the fire’s energy is reaching you as Radiation (electromagnetic waves) , travelling through the cold air without requiring it as a medium. Every object with a temperature a...
Read more