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摘 要： 对热电单元进行传热分析，建立了导热微分方程并在第三类边界条件进行求解，通过控制变量法得到制冷量Qc，性能系数COP随冷热端换热强度，尺寸因子G，和电流的变化曲线，综合分析了上述参数对热电制冷器制冷性能的影响。结论表明，提高冷热端换热强度能够提高热电制冷器的制冷量与性能系数，同时提高热端换热强度对制冷性能的改善要优于提高冷端换热强度，此外热电制冷器制冷性能随G因子和电流变化呈二次曲线型，即其他条件确定后，系统存在最佳电流或最佳G因子。 关键词： 散热强度；G因子；制冷量；COP Influence Of The Heat Transfer Intensity And G-Factor On The Performance Of The Thermoelectric Refrigeration Device Li Aibo Chen Huanxin Shen Limei Mei Peipei Department of Refrigeration nbsp; Abstract: Heat transfer analysis for thermoelectric module was done,and the numercial solution of the differential eguation under the third kind boundary condition was provided.Through controling the variable,graphs of the cooling capacity Qc and the coefficient of performance COP changing with heat transfer intensity,G factor and operating current were obetained. Comprehensive analysis on the relationgships between those parameters and the cooling performance of thermoelectric refrigeration device were made. Conclusion shows that increases of the heat transfer intensity on both cold side and hot side can improve the cooling capacity and the coefficient of performance of thermoelectric refrigeration device . Also improvements to the systerm performance by increasing the heat transfer intensity were better on hot side than on cold side. Besides the changes of the performance of thermoelectric refrigeration device with G factor and the current were both quadratic curves. When other conditions were constant, there exist the optimal current or optimal G factor. Keywords: heat transfer intensity ; G factor; Cooling Capacity; COP