| 摘要: |
| 针对电动汽车锂离子电池发热的问题，本文提出了上部加热/底部冷却型L形脉动热管。该脉动热管具有加热段长、冷却段和绝热段短的特点。研究了在供热量为10~30 W，冷却水温度为20~30 ℃，甲醇充液率为7.1%~21.2%条件下L形脉动热管启动与传热特性的影响。实验结果表明：随着充液率的增加，该脉动热管的启动温度呈增大的趋势，而热阻呈先减小后增大的趋势。并且随着加热量的增加，启动温度、启动时间和热阻均呈减小的趋势。当充液率为10.1%~14.1%时，在10~20 W的加热量和25 ℃冷却水条件下电加热板的平均温度保持在54.7 ℃以内，表明L形脉动热管能够充分保障电动汽车电池正常工作所需温度，且显示出良好的启动和传热性能。 |
| 关键词: 脉动热管 传热性能 运行工况 锂离子电池热管理 |
| DOI： |
| 投稿时间：2021-12-21 修订日期：2022-02-24
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| 基金项目:国家自然科学基金（51708162），黑龙江省普通本科高等学校青年创新人才培养计划项目(UNPYSCT－20200214) 和哈尔滨商业大学青年后备人才支持计划(2020CX23和2019CX24)资助。 |
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| Start-up and Heat Transfer Characteristics of L-shaped Pulsating Heat Pipe |
| Chi Riguang,Guo Zirui,Gong Xujin |
| (School of Energy and Civil Engineering, Harbin University of Commerce) |
| Abstract: |
| In this study, an L-shaped pulsating heat pipe was proposed to address the thermal management problem of lithium-ion batteries in electric vehicles. A pulsating heat pipe has a long heating section, a short cooling section, and a short insulation section. The parametric effects on the start-up and heat transfer characteristics of an L-shaped pulsating heat pipe were studied, includingthe heating capacity of 10–30 W, cooling water temperature of 20–30 ℃, and methanol filling ratio of 7.1%–21.2%. The results showed that as the filling ratio increased, the start-up temperature increased, and the thermal resistance first decreased and then increased. As the heating power increased, the start-up temperature, start-up time, and thermal resistance decreased. The maximum temperature of the heater was 54.7 ℃ for a 14.1% filling ratio and 10–20 W heating power, indicating that the L-shaped pulsating heat pipe can effectively maintainthe temperature required for the normal operation of batteries in an electric vehicle. |
| Key words: oscillating heat pipe heat transfer performance operating conditions lithium-ion battery thermal management |
