THERMAL CONDUCTIVITY OF CONTROLLED ICE-FRACTION MATERIALS

摘要：

Effective thermal conductivity predictions for frozen products require both an ice fraction model and an effective thermal conductivity model; hence there are two degrees of freedom when comparing model predictions to experimental data for real foods, which can lead to misleading conclusions. To avoid ice fraction prediction uncertainties, thermal conductivity was measured for two types of ice samples (ice chips produced by a commercial ice maker, and synthetic snow) in which the ice and air fractions were controlled. Levy’s effective thermal conductivity model provided reasonable predictions for the ice-chip data, although greater accuracy was obtained using a composite effective medium theory and co-continuous model. The Maxwell-Eucken model provided reasonable predictions for the synthetic snow data; however, systematic error in these measurements may have been significant.

作者: J.K.CARSON J.F.WANG J.WILLIX M.F.NORTH D.J.CLELAND

作者单位: University of Waikato, Private Bag 3105, Hamilton, New Zealand Massey University, Private Bag 11222, Palmerston North, New Zealand AgResearch Ltd, Private Bag 3123, Hamilton, New Zealand

会议类型: 国际会议

会议名称: The 22nd International Congress of Refrigeration(第22届国际制冷大会)

会议地点: 北京

会议语种:英文

在线出版日期: 2007-08-21（万方平台首次上网日期，不代表论文的发表时间）