Heat pipe
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A heat pipe is a heat-transfer device that employs phase transition to transfer heat between two solid interfaces.
A laptop computer heat pipe system
Heat pipes keep ground frozen and inhibit water transfer into the open pit during mining activities at Ekati Diamond Mine.
Cross section of a heat pipe for cooling the CPU of a laptop computer. Ruler scale is in millimetres.
Heat pipes on spacecraft typically use a grooved aluminum extrusion as the envelope.
Heat sink
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A heat sink is a passive heat exchanger that transfers the heat generated by an electronic or a mechanical device to a fluid medium, often air or a liquid coolant, where it is dissipated away from the
Heat pipe
…pipes to shut down a nuclear reactor in case of an emergency and simultaneously transferring decay heat away to prevent the reactor from running hot. Heat sink – Passive heat exchanger that transfers heat Loop heat pipe – Two-phase heat transfer device…
A fan-cooled heat sink on the processor of a personal computer. To the right is a smaller heat sink cooling another integrated circuit of the motherboard.
Typical heatsink-fan combination found on a consumer laptop. The heatpipes which contain a working fluid make direct contact with the CPU and GPU, conducting heat away from the component and transferring it to the fin-stack mounted on the exhaust port of the cooling fan. The fin-stack acts as a fluid-to-fluid heat exchanger transferring thermal energy from the working fluid within the heatpipe(s) to ambient air at dead-state[clarification needed] condition.
A heat sink (aluminum) with its heat pipes (copper) and fan (black)
Power transistor heat sinks. Left for TO-3 package, right for TO-220 package, middle for two TO-220.