Condition:New
Type:Logic ICs
Model Number:10145
Supply Voltage:W
Dissipation Power:W
Operating Temperature:W
Applications:
Primary and secondary science experiments to explore early childhood elementary education found experimental demonstration of physical phenomena demonstrate scientific inquiry
Packing list :
A thermoelectric power generation demonstration instrument ; experimental beaker two
Products
A : Specifications
Using two electrodes made of an aluminum heat sink plate , the size of7.4 * 3.8 * 15cmThe motor uses1.5V-6VMulti-turn motor, small fan diameter4.2cmCenter hole2mmCan be controlled by a switch , fitted effect chip temperature difference between your feet.
Two : Principles
1By using a battery as a driving temperature difference .
2, The temperature difference between the temperature difference is the use of the battery , the battery through the Seebeck effect , so that the thermal energy directly into electrical energy. The temperature difference between the battery materials are generally two types of metal and a semiconductor , this product is the use of semiconductor.
3,Seebeck effect of the temperature difference between batteries made with semiconductor strong heat into electricity efficiency is higher, therefore , may be composed of a plurality of such cells thermopile , as a small power supply . Its working principle is that the end of the two different types of thermoelectric conversion material N -type and P -type semiconductor combined and placed in a high temperature state , and the other end open and given the low temperature , high temperature side effects due to thermal excitation is strong , hole and electron concentration higher than the lower temperature side , in which the carrier is driven by the concentration gradient , the diffusion of holes and electrons to the low temperature side , so that the open end is formed at low electric potential difference ; if the plurality of pairs of P -type and N -type thermoelectric conversion material composed of modules connected together , a sufficiently high voltage can be obtained to form a temperature differential generator
Three: Operation
1Power generation :
Remove the instrument , were charged with two cups of hot water (45-60Degrees) and cold water , the feet were placed in a glass of water ( a cup of hot water also available) , open the instrument switches15Seconds after the current is generated to drive the fan rotation .
2Refrigeration :
Use6VChiang reverse the positive and negative power supply into the power jack, too30Seconds can feel the instrument appear cool phenomenon.
Four: Save
Feet of water to dry after use , put in the box , placed in dry places , avoid aluminum rust.
Explore, question , ponder
1 ), Feet cold glass insert , whereas exchange about you? Give it a try .
Answer: the same effect , just change the current direction , the fan reversed
2 )If the current from the two terminals of motor input into, remove the motor , what would be the effect ? Generate electricity using the temperature difference between the original , can now generate electricity temperature difference ?
A: The power generation component arms close to the cold side of the hot side , which is the Peltier effect
3 )If the manufacture of two large plates , one placed under the strong summer sun Kaoshai , a piece on the deep sea , the effect that happen ?
A: This is a wide range of thermoelectric power generation , there are many such phenomena in nature
