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For purposes of air conditioning, the Han dynasty craftsman and engineer Ding Huan (fl. 180 CE) invented a manually operated rotary fan with seven wheels that measured 3 m (10 ft) in diameter; in the 8th century, during the Tang dynasty (618–907), the Chinese applied hydraulic power to rotate the fan wheels for air conditioning, while the ...
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.
Besides passive heat conduction, active cooling consuming electricity can be achieved through the thermoelectric coolers. [5] When electrical voltage is added to an n-type (p-type) semiconductor material, the electric filed will drive electrons from one end to the other, which will also carry the electronic kinetic energy and entropy.
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A ride-on cooler is a means of transportation that can store and cool beverages and other food products. It is a combination of a low-power engine with a go-cart frame which uses the cooler as a seat. The ride-on cooler can transport food and drinks short distances and can be used in a small backyard, a neighborhood, or at
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