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Analysis Of Heat Transfer Process And Optimization Of Thermal Layout Of Multi-TEC Module

Posted on:2023-12-21Degree:MasterType:Thesis
Country:ChinaCandidate:H N YangFull Text:PDF
GTID:2532306623996509Subject:Engineering
Abstract/Summary:PDF Full Text Request
The thermoelectric cooler converts electrical energy into thermal energy through thermoelectric effect,and the standard thermoelectric refrigeration module is formed by adding heat exchange modules on both sides.In practical work,it is often necessary to use multiple thermoelectric coolers at the same time,but there are few studies in this regard.In this paper,a calculation method for the performance parameters of multi-refrigerator thermoelectric refrigeration module is proposed by combining the thermal equilibrium equation and the thermal resistance matrix model of thermoelectric refrigeration.Combined with theoretical calculation and finite element simulation,the heat transfer process and working characteristics of multirefrigerator thermoelectric refrigeration module were analyzed,and the thermal layout of thermoelectric refrigeration chip was optimized.The research is as follows :1)Based on the thermal equilibrium equation and thermal resistance matrix model of thermoelectric refrigeration,a theoretical calculation model for multirefrigerator thermoelectric refrigeration module is proposed,and compared with the finite element simulation results to verify the effectiveness of the calculation method.Taking 4-TEC thermoelectric refrigeration module as an example,combined with theoretical calculation and simulation results,it is found that multi-refrigerator thermoelectric refrigeration module has similar working characteristics with singlerefrigerator thermoelectric refrigeration module.2)The finite element simulation method is used to analyze six groups of thermoelectric refrigeration modules with the same effective working area and theoretical performance parameters.It is found that even with the same effective working area and theoretical performance parameters,thermoelectric refrigeration modules with different thermoelectric refrigeration plate layouts still have different working performance,and under the same layout,thermoelectric refrigeration modules have the same working performance,that is,the thermal layout of thermoelectric refrigeration plates affects the working performance of thermoelectric refrigeration modules.3)Combined with theoretical calculation and finite element simulation analysis,the working performance of 4-TEC thermoelectric refrigeration module with different thermal layouts of thermoelectric coolers is compared.It is found that the performance of 4-TEC thermoelectric refrigeration module with four uniformly distributed thermoelectric coolers is better than that with four centered thermoelectric coolers.When the heating power of the heat source is 50 W and the working current of the thermoelectric cooler is 6 A,the cooling effect of the former is increased by 4 %and the cooling efficiency is increased by 14 %.4)The theoretical calculation model is used to analyze the power supply mode and the corresponding optimal working current of two 4-TEC thermoelectric refrigeration modules with thermal layout of thermoelectric coolers.It is found that the optimal working current of the two is close to each other under the three power supply modes of series power supply,two-two series power supply and independent power supply.Therefore,in order to simplify the power supply components,the power supply mode of series power supply is recommended.The research results of this paper can partially replace the finite element simulation in the preliminary design of related thermal design,and have certain reference significance for the optimization of multi-refrigerator thermoelectric refrigeration module.
Keywords/Search Tags:Thermoelectric refrigeration, thermoelectric refrigeration module, Heat balance equation of thermoelectric refrigeration, thermal resistance matrix, thermal layout
PDF Full Text Request
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