黄莉.相变蓄冷剂对冷链包装温控效果的影响[J].包装工程,2019,40(5):72-79.
HUANG Li.Influence of Phase Change Material on Temperature Control Performance of Cold-chain Packaging[J].Packaging Engineering,2019,40(5):72-79. |
| 相变蓄冷剂对冷链包装温控效果的影响 |
| Influence of Phase Change Material on Temperature Control Performance of Cold-chain Packaging |
| 投稿时间：2018-11-19 修订日期：2019-03-10 |
| DOI：10.19554/j.cnki.1001-3563.2019.05.000 |
| 中文关键词: 冷藏链 冷藏单元 温控 相变 潜热 过冷度 |
| 英文关键词: cold chain cold unit temperature control phase change latent heat degree of subcooling |
| 基金项目:浙江省公益性技术应用研究计划（2017C34002） |
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| 中文摘要: |
| 目的 研究不同相变蓄冷剂对冷链运输包装传热性能和温控时间的影响。方法 通过采用独特的包装结构设计，并根据运输环境温度对蓄冷剂进行不同的预处理，充分利用相变材料在固-液相态转变过程中良好的温控性能。结果 在保温箱体性能参数不变的情况下，其温控时间取决于所用相变材料的相变温度和相变焓值。在极端高温、极端低温和交变温度条件下，采用熔点为5 ℃的相变蓄冷剂，可以将包装的保温时间从1 h延长至80 h以上，而且包装内保持了长时间4~5 ℃的恒温平台；采用熔点为0 ℃的水作为蓄冷剂，包装内则会出现长时间的过冷，温度平台在?1~2 ℃范围内。实验测得的包装保温时间与传热计算所得的理论值相吻合，偏差不大于±10%。结论 采用合适的相变蓄冷剂可以大大延长温控包装的保温时间，并通过对蓄冷剂进行有效的预处理，在各种极端温度环境下均可确保冷藏药品的运输安全。 |
| 英文摘要: |
| The work aims to study the effects of different phase change materials on packaging heat transfer and temperature control duration during cold-chain transportation. By adopting a unique packaging structure design and carrying out different pretreatment on the phase change materials according to the transportation environment temperature, the good temperature control performance of the phase change material in the solid-liquid phase transition process was fully utilized. When the performance parameters of the thermal insulation box kept unchanged, the temperature control duration depended on the phase change temperature and phase change enthalpy of the adopted phase change material. The phase change material with melting point of 5 ℃ at the extremely high temperature, extremely low temperature and alternating temperature can extend the holding time of package from 1 hour to more than 80 hours and the constant temperature platform of 4~5 ℃ was maintained in the package. When the water with melting point of 0 ℃ was used as PCM, the package was excessively cooled for long time and the temperature platform was within -1~2 ℃. The package holding time experimentally determined agreed well with that theoretically calculated value and the deviation was within ±10%. Thus, suitable PCM can greatly extend the holding time of temperature-controlled package and the effective pretreatment on phase change materials can ensure the transportation safety of refrigerated drugs at all extreme temperature. |
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