| 摘要: |
| 本文搭建了以R1233zd(E)为工质的多通道直冷板两相循环冷却系统，并在冷凝温度为10、15、20 ℃，质量通量147~882 kg/(m2?s)，热流密度7.73~39.75 kW/m2工况下对系统热力学循环和冷却性能进行实验研究。实验结果表明：质量通量上升，出口制冷剂焓值降低，热流密度上升，蒸发压力与出口制冷剂焓值升高。不同热流密度下冷板壁面温度随质量通量的变化趋势有所不同：当热流密度为7.73 kW/m2时，制冷剂质量通量由147 kg/(m2?s)增至735 kg/(m2?s)，最大温差由2.9 K降至1.6 K；当热流密度为39.75 kW/m2时，最大温差由3.6 K增至5.2 K。不同质量通量下，换热系数随热流密度增加有不同幅度的升高：质量通量为147 kg/(m2?s)时，换热系数由1 843 W/(m2?K)增至4 528 W/(m2?K)；而质量通量为588 kg/(m2?s)时，在相同条件下换热系数由1 536 W/(m2?K)增至3 569 W/(m2?K)。 |
| 关键词: 两相冷却 表面传热系数 冷却性能 直冷板 |
| DOI： |
| 投稿时间：2021-03-25 修订日期：2021-06-10
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| 基金项目:国家自然科学青年基金(51906158)资助项目。 |
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| Experimental Investigation on Two-phase Circulation Cooling System with Multi-channel Direct Cooling Plate |
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Yang Wenliang1, Fang Yidong1,2, Hu Lingren1, Xu Dan1, Su Lin1,2, Li Kang1,2
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| (1.School of Energy and Power Engineering, University of Shanghai for Science and Technology;2.Shanghai Key Laboratory of Multiphase Flow and Heat Transfer in Power Engineering) |
| Abstract: |
| A two-phase circulation cooling system with a multi-channel direct cooling plate was developed. The R1233zd(E) cooling medium was used. The thermodynamic cycle and cooling performance were investigated under the following conditions: the condensing temperature was set to 10, 15, and 20 °C, the mass flux varied from 147–882 kg/(m2?s), and the heat flux varied from 7.73–39.75 kW/m2. The results show that the enthalpy of the refrigerant at the cooling plate outlet decreases with an increase in the mass flux. Additionally, the system pressure and enthalpy of the refrigerant increase with an increase in heat flux. Under different heat fluxes, the wall temperature of the cold plate varies differently. When the heat flux is 7.73 kW/m2, the maximum temperature difference decreases from 2.9 to 1.6 K, whereas the mass flux rises from 147 to 735 kg/(m2?s). For a heat flux of 39.75 kW/m2, the maximum temperature of local wall difference increases from 3.6 to 5.2 K. For different mass flux, the heat transfer coefficients rise to different degrees with an increase in heat flux. When the mass flux is 147 kg/(m2?s), the heat transfer coefficient increases from 1 843 to 4 528 W/(m2?K). However, for a mass flux of 588 kg/(m2?s), the heat transfer coefficient under the same condition rises from 1 536 to 3 569 W/(m2?K). |
| Key words: two-phase cooling surface heat transfer coefficient cooling performance direct cooling plate |
