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| Transient characteristic of thermoelectric cooler with heating element in confined space |
Fan-kai MENG( ),Chen-xin XU,Yue-tong SUN |
| College of Power Engineering, Naval University of Engineering, Wuhan 430033, China |
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Abstract A transient model of thermoelectric refrigerator working in a cooling space with a heating element was established based on the finite-time thermodynamic theory in order to analyze the influence of heating element on the transient characteristics of thermoelectric cooler in confined space. The influence of key parameters on the transient performance of the thermoelectric refrigerator under different working conditions was analyzed by using the thermal resistance network analysis method. The variation laws of performance parameters such as cooling space temperature, cooling coefficient and cooling capacity with time were obtained. The heating element power, working current, cooling water flow rate and filling coefficient were changed respectively. The changing laws of the minimum cooling temperature and the cooling coefficient under different working conditions were compared and analyzed. The transient characteristics of the working parameters of the thermoelectric cooler were obtained. A test platform for a water-cooled thermoelectric cooler was constructed. The transient characteristic experiment of thermoelectric cooler in confined space was developed. Results showed that the simulation temperature drop was 8.96, 8.33 and 6.94 K respectively when the heating element power was 0.95 W, 4.85 W and 13.3 W. The experimentally measured temperature drop was 6.75, 5.63 and 4.0 K, respectively. The temperature trend of experiment and simulation was consistent. The experimental results verified the computational model.
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Received: 11 April 2022
Published: 17 January 2023
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| Fund: 国家自然科学基金资助项目(11974429)；海军工程大学自主研发计划资助项目(425317T01C) |
含发热元件密闭空间热电制冷器瞬态特性
为了研究密闭空间中发热元件对热电制冷器瞬态特性的影响，基于有限时间热力学理论，建立工作在含发热元件制冷空间中的热电制冷器计算模型. 采用热阻网络分析方法，分析不同工况下关键参数对热电制冷器瞬态特性的影响，得到制冷空间温度、制冷系数、制冷量等性能参数随时间的变化规律. 分别改变发热元件功率、工作电流、冷却水流速和填充系数，对比分析不同工况下的最低制冷温度和制冷系数变化，得到热电制冷器工作参数的瞬态特性. 搭建水冷式热电制冷器的测试平台，开展密闭空间热电制冷器的瞬态特性测量实验. 结果表明，当发热元件功率分别为0.95、4.85和13.3 W时，仿真计算温降分别为8.96、8.33和6.94 K，实验测得温降分别为6.75、5.63和4.00 K，温度变化趋势一致，验证了计算模型.
关键词：
热电制冷,
瞬态特性,
制冷温度,
密闭空间,
发热元件
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