Two heat sources in the system, the inner substrate of the LED chip and the condenser are all coupled to the thermoelectric converter. The principle of thermoelectric conversion is based on the Seebeck effect, that is, the junction ends of the two semiconductors are placed in a high temperature environment, and the electromotive force is obtained at the other end of the low temperature environment to realize thermoelectric conversion. The temperature difference potential of semiconductors is the most obvious and can be used as a thermoelectric conversion device. Currently, the efficiency of existing semiconductor thermoelectric conversion devices on the market is generally 30%. After the LED light source is energized, the box-shaped inner substrate made of a highly thermally conductive material spreads heat on its surface. The heat conducted by the inner substrate heats the chip type thermoelectric converter mounted on the outer side of the inner substrate to form a hot end, and the other side of the chip type thermoelectric converter is in close contact with the outer substrate on which the heat dissipating fins are formed to form a cold end. Another part of the chip type thermoelectric converter is installed above each flat tube of the tube-and-tube condenser. Since the refrigerant condenses and releases heat in the tube-and-tube condenser, the heating surface of the chip type thermoelectric converter forms a hot end, and the chip type thermoelectric conversion The other side of the device is provided with heat dissipating fins to form a cold end. The hot and cold end of the thermoelectric converter forms a large temperature difference and generates a current. The current generated by the above two parts of the thermoelectric converter is output through the output wire and stored in the electric energy storage unit to supply power for the illumination of the LED light source.
The thermal analysis assumes that the electric power of the LED chip is 405W, which consists of 81 (horizontal 9 vertical 9) each 5W LED chip. According to the luminous efficiency of 10%, the heat Q released by the LED is 364.5W. The inner substrate heats the surface on the surface. Disperse, first through the thermoelectric converter to convert heat into electrical energy, the remaining heat is absorbed by the evaporator. It is assumed that the thermoelectric conversion efficiency η of the semiconductor thermoelectric device is 30%; the electric power converted by the thermoelectric converter on the outer side of the inner substrate is P; the heat absorbed by the evaporator is Q, according to the heat balance: the compressor can adopt a certain type of miniature closed rotor compressor Assume the COP of the system (output-to-input ratio in the refrigeration system, output refers to the heat absorption of the evaporator, input refers to the electrical work consumed by the compressor) = 3, compressor electric power: compressor power Q according to the ideal compressor Calculation, the input efficiency η is 0.6. According to the energy conservation of the refrigeration system: anti-harsh environment design and test technology.
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