Capillary Pumped Loop

A Capillary Pumped Loop (CPL) is a passive cooling system that uses capillary action within tiny, wick-like structures to circulate coolant. The wick draws the liquid via surface tension, moving it through a loop that absorbs heat from electronic components or machinery. As the liquid absorbs heat, it vaporizes, then condenses back into liquid in a cooler area, completing the cycle. This process efficiently transfers heat without pumps or moving parts, making CPLs reliable for maintaining optimal temperatures in sensitive equipment like spacecraft and high-performance electronics.