THERMODYNAMIC ANALYSIS OF THE INTERNAL MELT-ICE-ON-TUBE DURING MELTING UNDER NATURAL CONVECTION
The numerical simulation of the ice melting processes in internal-melt ice-on-tube which is applied widely in the ice storage system is carried out. The dynamic mathematical models about melting are established and solved by using enthalpy method. Natural convection of the melted water in the course of melting is studied, and natural convection influences on single tube in melting heat transfer process is analyzed under the related parameters. Several conclusions are obtained:1. Because of natural convection of the melted water, the curve of melting interface is no longer a circle, but a curve changing with angle. The melting radius reaches minimum at the bottom and maximum at the top.2. The one with natural convention is compared with the one which was not considered. At initial stage, the influence of natural convection is smaller in the course of melting. However, the influence of natural convention increases along with melting.3. As the increase of cryogen inlet temperature, the influence of natural convention is more and more in the process of melting heat transfer. Under the conditions of the different cryogen velocity, the different diameter of tube and the different initial temperature of ice layer, the effect of natural convention also is different in the process of melting heat transfer.
ice storage internal-melt ice-on-tube numerical simulation enthalpy method
Yi LIU Bingxi LI Jianlong MA
School of Energy Science and Engineering, Harbin Institute of Technology,Harbin, 150001, China
国际会议
The 22nd International Congress of Refrigeration(第22届国际制冷大会)
北京
英文
2007-08-21（万方平台首次上网日期，不代表论文的发表时间）