Experimental Investigations of Flow Resistance and Convection Heat Transfer and Prediction of Cold Heat-Storage Characteristics for a Phase-Change Emulsion in a Coiled Circular Tube
Experimental Investigations of Flow Resistance and Convection Heat Transfer and Prediction of Cold Heat-Storage Characteristics for a Phase-Change Emulsion in a Coiled Circular Tube
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DOI：
10.1080/01457630590950916
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发表时间：
2005-07
影响因子：
2.3
通讯作者：
Zhennan Zhao;Yuquan Shi
中科院分区：
文献类型：
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作者：
Zhennan Zhao;Yuquan Shi
本文介绍了乳化液相变蓄冷传热材料及其应用，并通过试验和计算报道了其有关的热性能。作为比较，简要介绍了现有的几种相变蓄冷技术和材料及其优缺点。本文还研究了该乳液作为功能潜热蓄热材料和传热强化流体的流动阻力、传热和蓄冷特性。用“场协同原理”解释了强化传热的原因。实验是在螺旋管套管换热器上进行的。最后，建立了实用的无因次关联式来表达不同无因次参数之间的关系。此外，还对影响蓄热率的各种因素进行了计算和分析。
Abstract This paper introduces emulsion phase change cold heat storage and heat transfer material and its applications and reports its related thermal properties by means of tests and calculations. As a comparison, some available cold heat storage techniques and materials with or without phase change are briefly introduced in respect to their benefits and disadvantages. The paper also investigates flow resistance, heat transfer, and cold heat storage characteristics of the emulsion as both a functional latent heat storage material and a heat transfer enhancement fluid. The reasons for heat transfer enhancement are explained by the “field synergy principle.” Experiments were made with a coiled double-tube heat exchanger. As a result, practical dimensionless correlations were developed to express the relationships among the different dimensionless parameters. In addition, calculations and analyses are made for various factors that influence the heat storage rate.