新型相变材料QN-2的蓄放热特性研究
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摘要
采用QN-2相变材料,设计并制作了同心套管式蓄放热单元,搭建了相变蓄热单元性能测试试验台,分别对在不同工况下的蓄放热进行了研究,分析了在改变热媒水的流量、进口温度变化、内管加入翅片的条件下对蓄放热过程的影响。研究结果表明:增大热媒水与蓄热材料的温差和热媒水的流量可以缩短蓄放热时间,在加入翅片的条件下对放热过程的影响没有对蓄热过程大。初步掌握同心套管式蓄热单元的蓄放热特性,为今后相变蓄热器的选型和性能的评估提供参考依据。
A phase change thermal storage unit, in which QN-2 was a phase change material(PCM),with the concentric bushing was designed. The thermal performances of the storage unit in different situations were recorded experimentally. Analyzing three conditions how to affect heat storage unit energy transfer performance, such as the inlet fluid temperature and flow and finned inner tube. Experiment results show that increasing temperature between the heat medium water and PCM can make the time shorter and the effect on the process of heat storage is larger than heat release with the finned inner tube. The results offer the reference in phase change thermal storage design and performance optimization in the future by understanding the characteristic of heat charge and discharge.
A phase change thermal storage unit, in which QN-2 was a phase change material(PCM),with the concentric bushing was designed. The thermal performances of the storage unit in different situations were recorded experimentally. Analyzing three conditions how to affect heat storage unit energy transfer performance, such as the inlet fluid temperature and flow and finned inner tube. Experiment results show that increasing temperature between the heat medium water and PCM can make the time shorter and the effect on the process of heat storage is larger than heat release with the finned inner tube. The results offer the reference in phase change thermal storage design and performance optimization in the future by understanding the characteristic of heat charge and discharge.
引文
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[4]丁理峰,叶宏,徐斌.相变材料和隔热材料降低顶层房间空调能耗效果之比较分析[J].太阳能学报,2009,30(12):1673-1677.
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[6]徐峰,田海川,孙勇,等.同心套管双流程相变蓄热单元蓄放热特性研究[J].流体机械,2013,41(1):68-72.
[7]冯国会,付永亮,常莎莎,等.基于空气源热泵的双向相变储能材料与系统储能单元研究[J].建筑节能,2013,29(6):35-38.
[8]李香玲,陈超,蹇瑞欢,等.填充板状定形相变材料蓄热槽蓄/放热特性实验研究[J].暖通空调,2005,35(10):122-126.
[2]Kenisarin Murat,Mahkamov Khamid.Solar energy storage using phase change materials[J].Renewable Energy,2007,11(9):1913-1965.
[3]石海民,梁德青,李栋梁,等.CH3COONa·3H2O相变蓄热性能研究[J].制冷学报,2009,30(2):8-11.
[4]丁理峰,叶宏,徐斌.相变材料和隔热材料降低顶层房间空调能耗效果之比较分析[J].太阳能学报,2009,30(12):1673-1677.
[5]崔海亭,王振辉,郭彦书,等.圆柱形相变蓄热器蓄/放热性能试验研究[J].太阳能学报,2009,30(10):1189-1192.
[6]徐峰,田海川,孙勇,等.同心套管双流程相变蓄热单元蓄放热特性研究[J].流体机械,2013,41(1):68-72.
[7]冯国会,付永亮,常莎莎,等.基于空气源热泵的双向相变储能材料与系统储能单元研究[J].建筑节能,2013,29(6):35-38.
[8]李香玲,陈超,蹇瑞欢,等.填充板状定形相变材料蓄热槽蓄/放热特性实验研究[J].暖通空调,2005,35(10):122-126.