| 摘要: |
| 本文基于压缩式循环原理，采用水冷式直接接触式蓄冷系统，研究了不同充注压力（3.5、3.6、3.7、3.8、3.9、4.0 MPa）和不同质量浓度（0.3、0.5、0.7、0.9 g/L）的十二烷基硫酸钠（SDS）溶液中，CO2水合物的生成特性和蓄冷特性。根据实验数据对蓄冷量、蓄冷速率和CO2水合物生成质量进行计算，结果表明：与未添加SDS的溶液相比，含有不同质量浓度的SDS溶液中，系统的预冷时间和蓄冷时间均缩短，水合物生成质量、总蓄冷量及平均蓄冷速率均有所提升，且随着充注压力的不断提高，系统的蓄冷性能也不断加强。当充注压力为4.0 MPa，SDS溶液质量浓度为0.5 g/L时，预冷时间（5.58 min）和蓄冷时间（10.92 min）达到最短。此时，系统的总蓄冷量（4 021.2 kJ）、潜热蓄冷量（2 476.8 kJ）、CO2水合物生成质量（4.95 kg）及平均蓄冷速率（6.14 kW）均达到最大值，即系统蓄冷能力达到最强，说明SDS对于本系统的CO2水合物蓄冷性能具有明显的强化效果。 |
| 关键词: 压缩式制冷循环 蓄冷 CO2水合物 SDS |
| DOI： |
| Received:June 30, 2020Revised:August 21, 2020 |
| 基金项目:国家自然科学基金(50806050) |
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| Experimental Study on SDS Enhancement of CO2 Hydrate Cool Storage System Based on Compression Refrigeration Cycle |
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Zhou Qi, Xie Yingming, Sun Jiaying, Wu Kanglong, Wu Qiankun
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| (School of Energy and Power Engineering, University of Shanghai for Science and Technology) |
| Abstract: |
| Based on the principle of vapor compression circle, this paper describes the formation and cool storage characteristics of CO2 hydrates in SDS solutions with different filling pressures (3.5, 3.6, 3.7, 3.8, 3.9, and 4.0 MPa) and SDS of different mass concentrations (0.3, 0.5, 0.7, and 0.9 g/L) using a water-cooled direct contact cool storage system. The experimental data were used to calculate the cool storage capacity, cool storage rate, and CO2 hydrate formation mass. The results show that, in comparison with the case of solutions without SDS, the pre-cooling time and cool storage time of the system were shortened in SDS solutions with different mass concentrations, and the hydrate formation mass, total cool storage capacity, and average cool storage rate increased. With the continuous increase in the charging pressure, the cool storage performance of the system was also strengthened. When the filling pressure was 4.0 MPa and the SDS solution mass concentration was 0.5 g/L, the pre-cooling time (5.58 min) and the cool storage time (10.92 min) were the shortest. At this time, the total cool storage capacity (4 021.2 kJ), latent heat cool storage capacity (2 476.8 kJ), CO2 hydrate formation mass (4.95 kg), and average cool storage rate (6.14 kW) of the system reached the maximum value, and the cool storage characteristics of the system attained the best condition. The study has shown that SDS has an obvious effect on the CO2 hydrate cool storage characteristics of this system. |
| Key words: compression refrigeration cycle cool storage CO2 hydrate SDS |
