冷冻型复合相变蓄冷材料的制备与性能评价
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摘要
提出自行研制的一种低温(-25～-23℃)复合相变材料。该材料由氯化钠作为主储能剂,碳酸钾与氯化钾作为降温剂,并且筛选合适的成核剂及防相分离剂进行复合。样品的热物理性能(相变温度、相变潜热等)和热循环性能通过差示扫描量热仪(DSC)来表征;过冷度和热循环稳定性通过温度记录仪表征。结果表明:制备的两种蓄冷剂的相变温度为-25～-23℃,相变潜热200J/g以上,过冷度较小且循环100次后不会出现相分离现象。
A low temperature(-25～-23℃)composite phase change material was developed.The material consisted of sodium chloride as the main energy storage agent,potassium carbonate and potassium chloride as a cooling agent,and screened suitable nucleating agent and anti-phase separating agent for compounding.Its thermal physical performance(the phase change temperature,latent heat and so on)and thermal cycling performance were observed by DSC,sub-cooling degree and cycling stability by temperature recorder.The phase change temperature of material was-25～-23℃,the phase change latent heat was above 200 J/g,the sub-cooling was small,and the phase separation will not occur after 100 cycles.
A low temperature(-25～-23℃)composite phase change material was developed.The material consisted of sodium chloride as the main energy storage agent,potassium carbonate and potassium chloride as a cooling agent,and screened suitable nucleating agent and anti-phase separating agent for compounding.Its thermal physical performance(the phase change temperature,latent heat and so on)and thermal cycling performance were observed by DSC,sub-cooling degree and cycling stability by temperature recorder.The phase change temperature of material was-25～-23℃,the phase change latent heat was above 200 J/g,the sub-cooling was small,and the phase separation will not occur after 100 cycles.
引文
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[18]张仁元.相变材料与相变储能技术[M].北京:科学出版社,2009,487-488.
[2]李金辉,刘晓兰,张荣军,等.新型相变储能材料研究进展[J].化工新型材料,2006,34(8):18-21.
[3]唐娟.低温相变蓄冷材料的热物性及应用研究[C].顺德:第九届全国空调器、电冰箱(柜)及压缩机学术交流会论文集,2008.
[4]Salyer,Ival O.Phase change composition containing a nucleating agent:US,US6402982B1[P].2002-06-11.
[5]章旭明,黄立维,潘利红,等.成核添加剂对低温相变蓄冷材料过冷度的影响研究[J].浙江工业大学学报,2007,35(5):501-504.
[6]高斯.保温包装中蓄冷剂的研制[D].无锡:江南大学,2013.
[7]Efimova A,Pinnau S,Mischke M,et al.Development of salt hydrate eutectics as latent heat storage for air conditioning and cooling[J].Thermochimica Acta,2014,575:276-278.
[8]Meng Q,Hu J.A poly(ethylene glycol)-based smart phase change material[J].Solar Energy Materials &Solar Cells,2008,92(10):1260-1268.
[9]Mo S P,Zhu K D,Yin T,et al.Phase change characteristics of ethylene glycol solution-based nanofluids for subzero thermal energy storage[J].International Journal of Energy Research,2017,41(1):81-91.
[10]Eman-Bellah S M,Ghazy M R A.Thermal conductivity enhancement in a latent heat storage system[J].Solar Energy,2007,81:839-845.
[11]Karaipekli A,Sari A,Kaygusuz K,et al.Thermal conductivity improvement of stearic acid using expanded graphite and carbon fiber for energy storage applications[J].Renewable Energy,2007,32(13):2201-2210.
[12]OróE,Barreneche C,Farid M M,et al.Experimental study on the selection of phase change materials for low temperature applications[J].Renewable Energy,2013,57(3):130-136.
[13]包伟强.一种相变温度为-25℃的相变材料:中国,103265931[P].2013-08-28.
[14]廖培忠.一种低温蓄冷剂:中国,102268240[P].2011-12-07.
[15]柳碧青.一种可用于冰箱、冰柜、冷柜等中的蓄冷剂:中国,1362462[P].2002-08-07.
[16]何自平.一种低温相变蓄冷剂:中国,102533224[P].2012-07-04.
[17]郭宁宁.多元有机相变蓄冷材料的热物性研究[D].重庆:重庆大学,2008.
[18]张仁元.相变材料与相变储能技术[M].北京:科学出版社,2009,487-488.