冰球式蓄冷系统蓄冰槽蓄冷过程的动态模拟
Dynamic simulation of ice storage tank storage process in encapsulated ice cool storage system
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3 m/s时2种方式对流换热系数相差0.71%，为5 m/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。
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 are 0.71% 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