冰球式蓄冷系统蓄冰槽蓄冷过程的动态模拟
摘要：建立了蓄冰槽系统的流动和传热模型, 针对蓄冰槽中载冷剂的流动方向、载冷剂进口位置对蓄冷过程的影响进行了研究。结果显示:进口流速越大, 努塞尔数Nu越大, 载冷剂与冰球间的对流换热系数越大, 出口温度越快达到稳定状态;设计蓄冰槽时, 采用载冷剂下进上出的流动方式比上进下出的对流换热系数大, 更有利于换热, 载冷剂流速为3m/s时2种方式对流换热系数相差0.71%, 为5m/s时相差0.99%, 随着载冷剂流速增大, 下进上出的优势体现得更加明显。
关键词：冰球式蓄冷 蓄冰槽 载冷剂 强化传热 数值模拟
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[3]SOKOLOV P, IBRAHIM M, KERSLAKE T.Computational heat-transfer modeling of thermal energy storage canisters for space applications[J].Journal of Spacecraft and Rockets, 2015, 37 (2) :265-272
[4]ISMAIL K A R, HENRIQUEZ J R.Numerical and experimental study of spherical capsules packed bed latent heat storage system[J].Applied Thermal Engineering, 2002, 22 (15) :1705-1716
[5]刘赟.冰球式蓄冷系统蓄冰特性分析和实验研究[D].北京:北京工业大学, 2010:23-54
[6]鲁刚.冰球蓄冷器传热过程的数值模拟[D].大庆:大庆石油学院, 2003:34-47
[7]胡家喜.冰蓄冷空调系统蓄冷释冷过程的研究[D].南京:南京工业大学, 2004:33-67
[8]张又升.大长宽比储能单元内融化相变传热过程的实验研究[D].上海:东华大学, 2016:19-54
[9]章熙民, 任泽霈, 梅飞鸣.传热学[M].5版.北京:中国建筑工业出版社, 2007:116-290
Dynamic simulation of ice storage tank storage process in encapsulated ice cool storage system
Abstract: Establishes a flow and heat transfer model of an ice storage tank system, and studies the influences of the coolant flow direction in the ice storage tank and the inlet position of the coolant on the cool storage process.The results show that the faster the inlet flow rate, the greater the Nusselt number, the greater the convection heat transfer coefficient between the coolant and the encapsulated ice, and the faster the outlet temperature reaching the steady state.When designing an ice storage tank, the convective heat transfer coefficient of the bottom-to-top flow is greater than that of the top-to-bottom flow, which is beneficial to heat exchange.The convection heat transfer coefficient differences of the two methods are0.71% and 0.99% at 3 m/s and 5 m/s of the flow rate of the coolant, respectively.The advantage is more obvious with the increase of the coolant flow rate.
Keywords: encapsulated ice cool storage; ice storage tank; coolant; enhanced heat transfer; numerical simulation;
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