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2. Pulse tube refrigerator - Wikipedia

   en.wikipedia.org/wiki/Pulse_tube_refrigerator

   Therefore, the compressor is uncoupled from the cooler. A system of valves (usually a rotating valve) alternately connects the high-pressure and the low-pressure side of the compressor to the hot end of the regenerator. As the high-temperature part of this type of PTR is the same as of GM-coolers, this type of PTR is called a GM-type PTR.

3. Thermoelectric cooling - Wikipedia

   en.wikipedia.org/wiki/Thermoelectric_cooling

   Thermoelectric cooling uses the Peltier effect to create a heat flux at the junction of two different types of materials. A Peltier cooler, heater, or thermoelectric heat pump is a solid-state active heat pump which transfers heat from one side of the device to the other, with consumption of electrical energy, depending on the direction of the current.

4. 31 of the best gifts for people who drive a lot - AOL

   www.aol.com/lifestyle/gifts-for-people-who-drive...

   Best of all, it charges with the same cables as your phone charger! "As my job requires, I have to travel a lot," wrote one reviewer. "For us who needs and enjoy a fresh brewed cup of coffee, this ...

5. Refrigerator - Wikipedia

   en.wikipedia.org/wiki/Refrigerator

   Food in a refrigerator with its door open. A refrigerator, commonly shortened to fridge, is a commercial and home appliance consisting of a thermally insulated compartment and a heat pump (mechanical, electronic or chemical) that transfers heat from its inside to its external environment so that its inside is cooled to a temperature below the room temperature. [1]

6. 35 of the very best outdoorsy gifts for hikers, hunters and ...

   www.aol.com/lifestyle/best-outdoorsy-gifts-for...

   This No. 1 bestseller comes with a 20-volt rechargeable lithium battery for cord-free convenience. "Excellent tool for small to medium tree and shrub trimming!" raved one reviewer. "It carves ...

7. Cryocooler - Wikipedia

   en.wikipedia.org/wiki/Cryocooler

   The Joule-Thomson (JT) cooler was invented by Carl von Linde and William Hampson so it is also called the Linde-Hampson cooler. It is a simple type of cooler which is widely applied as cryocooler or as the (final stage) of coolants. It can easily be miniaturized, but it is also used on a very large scale in the liquefaction of natural gas.