Abstract
The thermoelectric refrigeration system is an application of the Peltier effect, and good refrigeration performance is dependent on effective heat dissipation performance. To enhance the cooling performance of the thermoelectric system, this paper designs a new type of finned heat sink, which does not change the overall size of the thermoelectric system. The performance of the refrigeration system under the new fin is tested by experiments under various conditions. During the experiment, the cooling wind speed, the temperature of the hot and cold side of the TEC, the power consumption of the fan, and other parameters were directly recorded through the measuring instrument. The results show that the use of new finned heat sinks can improve the COP of the thermoelectric refrigeration system. Within the scope of the study, the thermal resistance of the new fins can be reduced by 42.6%, and the system COP value can be increased by 22.8%. In addition, increasing the cooling wind speed can further reduce the cold side temperature. Within the research range, the lowest temperature can reach −8.25 °C, but the power consumed by the fan is 166% of that of the conventional fin heat sink refrigeration device.
Highlights
The Peltier effect is used in thermoelectric refrigeration (TEC), which is the direct conversion of electrical energy into heat and cold
This phenomenon can be explained as when the heat sink on the hot side of the TEC module is constant, adding sub-channel fins is comparable to expanding the heat dissipation area of the heat sink, which enhances the heat exchange rate between solids and fluids
This phenomenon can be explained as when the heat sink on the hot side of the TEC module is constant, adding sub-channel fins is comparable to expanding the heat dissipation area of the heat sink, which enhances the heat exchange rate beEnergies 2022,tween
Summary
The Peltier effect is used in thermoelectric refrigeration (TEC), which is the direct conversion of electrical energy into heat and cold. Cuce et al [15] used comprehensive experimental methods to investigate the effect of nanofluid heat dissipation on the cooling performance of thermoelectric refrigeration modules and discovered that different types of nanofluids have better thermal conductivity than pure water. In the above research, the efficiency of the thermoelectric system is improved through the design of a new type of heat dissipation system, but the new type of system designed requires additional space and thermal budget For this reason, plate finned heat sinks are a good choice. The shape of the fins becomes cylindrical [16], conical [17], rectangular [18], trapezoidal [19], irregular [20], and arranged irregularly [21,22,23] to improve its heat dissipation performance In this regard, a new type of finned heat sink is designed for use in the heat dissipation of the hot-end of the thermoelectric refrigeration system. Experiments are conducted to verify the effectiveness of the new heat sink in improving the cooling performance of the thermoelectric refrigeration system under different working conditions
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