With electronic devices becoming smaller, faster, and more powerful than ever before, effective thermal management has risen to become one of the most important considerations in 21st-century design and engineering.
Performance, reliability, and product lifespan can all be improved when steps are taken to manage heat more efficiently.
This is imperative across such applications as industrial control systems, telecommunications infrastructure, consumer electronics, and electric vehicles (EVs).
An Introduction to Thermal Management
Thermal management is the practice of controlling the temperature of electronic systems and components. Through the use of various combinations of passive and active cooling methods, equipment can be kept within safe temperature limits.
Common thermal management solutions include heatsinks, thermal interface materials (TIMs), and for larger enclosures or facilities, air conditioning units. Further options to be found in RS Online’s HVAC, fans and thermal management range encompass axial fans, filter fans, thermal gap pads, and ventilation grilles.
The Real-World Consequences of Poor Thermal Management
The overheating of electronic systems doesn’t just cause temporary malfunction; it is also a major factor in the long-term degradation of devices.
Even relatively small temperature increases can bring about various adverse consequences, such as:
- Reduced lifespan. A commonly used engineering rule of thumb based on Arrhenius-type thermal ageing models suggests that, for certain components and insulation systems, every 10°C rise in operating temperature can approximately halve service life.
- Unexpected failures and downtime. Overheated components can potentially cause an entire electrical system to come to a halt. This can lead to prolonged production stoppages and a need for expensive repairs.
- Safety risks. Extreme cases can result in component burnout, fire hazards, or battery thermal runaway. The latter is an uncontrollable chain reaction whereby excess heat triggers internal chemical breakdowns, causing the temperature of the battery to go up even faster.
- Energy inefficiency. Overheated systems tend to consume more power and may require more aggressive (and noisy) cooling at a later stage.
Amid the movement in recent years towards ever-stricter energy efficiency regulations and an intensifying sustainability focus, poor thermal design is also detrimental for many organisations’ compliance and environmental credentials.
What Thermal Management Strategies Might You Put in Place?
If you’re a decision-maker for a business that is concerned about this aspect of its operations, you and your colleagues should remember the principles of good thermal management.
Specifically, the best solutions will dissipate heat efficiently, at the same time as maintaining quiet, compact, and cost-effective designs.
Here are some frequently taken approaches that your organisation may consider:
- Passive cooling solutions such as heatsinks, TIMs like pads or pastes, and optimised printed circuit board (PCB) layouts with thermal vias or copper planes.
- Forms of active cooling encompassing the likes of axial and centrifugal fans, blowers, and air movers.
- Advanced solutions ranging from liquid cooling, heat pipes, and vapour chambers to thermoelectric (Peltier) modules and HVAC systems for larger enclosures.
- Monitoring and control options such as temperature sensors combined with variable-speed fans or smart controls for efficiency.
The right combination of approaches will depend on the given application. A consumer gadget, for example, will benefit from thermal management solutions that wouldn’t be appropriate choices for a renewable energy inverter or a rugged industrial controller.
Conclusion: The Importance of A ‘Ground-Up’ Thermal Design Ethos
Whatever exact pathways you take with your organisation’s thermal management, this is a topic that should never be an afterthought.
By considering the most effective thermal strategies from the earliest design stages, you can help ensure your business’s products and systems run cooler and maintain reliable high performance over longer operating lifetimes.
