Figure 1. Four board high rack with serial air flow configuration. Figure 2. Rack with intercoolers cooled by water flowing parallel to air flow direction. In the February 2007 issue of ElectronicsCooling the Calculation Corner article addressed the use of a water-cooled air-to-liquid heat exchanger to reduce computer rack air exhaust temperatures and mitigate the effect of … [Read more...]
Moisture permeation in electronics
Environmental control for electronic packages and enclosures often involves understanding and managing moisture concentration. Excessive moisture combined with processing temperatures can cause damage. High humidity levels have other potentially harmful effects such as corrosion. Since the movement of heat and moisture are similar (i.e., diffusive), thermal engineers may be … [Read more...]
Synthetic jets for forced air cooling of electronics
Introduction As increasing functionality is packaged into ever-shrinking electronics, cooling requirements rise exponentially. While there have been continued advances in high heat flux technologies [1], commercial, consumer-oriented systems continue to focus on aircooling for reasons of reliability, acoustics, cost and portability [2]. In order to support the increasing power … [Read more...]
Microscale heat transfer
Advances in microfabrication processes have led to a continuous miniaturization of Field Effect Transistors (FET) that contain semiconductor (e.g., silicon), insulator (e.g., silicon dioxide), and metallic (e.g., copper interconnects) layers only a few nanometers thick. Ever increasing demand for faster microprocessors and the continuous trend to pack more transistors on a … [Read more...]
Piezo actuators for electronics cooling
Introduction Today, there is a specific demand by the electronics consumer market: more devices using low power processors with multiple simultaneous CPU functions. Due to the significant demand in computing needs, the International Technology Roadmap for Semiconductors (ITRS) 2005 predicts an increase in the overall power consumption for some platforms [1]. The cooling issues … [Read more...]
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