高潜热相变砂浆与相变板墙体性能对比研究

Comparison on performance of phase change mortar and board wall with high energy storage

中文关键词: 相变砂浆  定形相变板  建筑节能  经济性分析

英文关键词: phase change mortar  phase change board  building energy saving  economic analysis

中文摘要:

      相变储能墙体面临着相变温度不适宜、储能能力低、构建形式多但缺乏性能对比分析等问题，为此，本文以相变砂浆、相变板墙体为对象，对其性能进行优化和对比研究。采用固、液石蜡、HDPE按比例熔融混合制备出相变温度约为34℃的定形相变材料，该材料无泄漏、形状稳定，潜热为现有文献的2倍多。基于该材料制备出相变砂浆、相变板材，并构建两类相变-混凝土墙体结构，研究在相同边界条件和初始条件下两者的传热特性及节能效果。结果表明，以普通砂浆墙体为对照，相变砂浆、定形相变板可将内壁面最高温降低0.73℃、1.76℃，定形相变板保温隔热性能最优。定形相变板可将空调热负荷降低21.9%，高于相变砂浆；但其原料成本为普通砂浆的3.38倍；成本增幅较相变砂浆高出32.8%，而成本回收周期低33.3%。

英文摘要:

      Phasechangewallshavetheproblemssuchasunsuitablephasechangetemperature,low energystoragecapacity,multipleconstructionformsbutlackofunifiedperformanceevaluation. Aimedattheaboveproblems,theperformanceofphasechangematerial(PCM)mortarandPCM boardwallwereevaluatedandoptimized.Solidandliquidparaffin,high densitypolyethylene (HDPE)wasmixedtoprepareaform-stabilizedPCM withasuitablephasechangetemperatureof about34.000℃.Thelatentheatwasincreasedtomorethan2.00timesoftheexistingliterature. BasedonthepreparedPCM,PCM mortarandPCMboardwallswereestablished.Accordingtothe heatcharacteristicsandenergysavinganalysis,themaximumtemperatureofinnerwallcanbereduced by0.730℃and1.760℃ byPCM mortarandPCMboardwallcomparedwithnormalmortar.The thermalinsulationperformanceofPCM boardisbetter.Theheatloadofairconditioningcanbe reducedby21.9% withthePCM board,whichishigherthanPCM mortar.However,itsraw materialcostis3.38timesofthatofthetraditionalmortar,32.8%higherthanthatofPCM mortar, buttherecoverycycleis33.3%lower.