SCI和EI收录∣中国化工学会会刊

›› 2017, Vol. 25 ›› Issue (9): 1288-1293.DOI: 10.1016/j.cjche.2016.10.026

• Biotechnology and Bioengineering • 上一篇    下一篇

Experimental study on freezing of liquids under static magnetic field

Hongxia Zhao1, Feng Zhang1, Hanqing Hu1, Sheng Liu2, Jitian Han1   

  1. 1 School of Energy and Power Engineering, Shandong University, Jinan 250061, China;
    2 Vegetable Research Center, Beijing Academy of Agriculture and Forestry Sciences, National Engineering Research Center for Vegetables, Beijing 100097, China
  • 收稿日期:2016-07-02 修回日期:2016-10-28 出版日期:2017-09-28 发布日期:2017-10-11
  • 通讯作者: Hongxia Zhao,E-mail:Hongxia.zhao@sdu.edu.cn;Jitian Han,E-mail:jthan@sdu.edu.cn
  • 基金资助:
    Supported by the National Natural Science Foundation of China (51306104).

Experimental study on freezing of liquids under static magnetic field

Hongxia Zhao1, Feng Zhang1, Hanqing Hu1, Sheng Liu2, Jitian Han1   

  1. 1 School of Energy and Power Engineering, Shandong University, Jinan 250061, China;
    2 Vegetable Research Center, Beijing Academy of Agriculture and Forestry Sciences, National Engineering Research Center for Vegetables, Beijing 100097, China
  • Received:2016-07-02 Revised:2016-10-28 Online:2017-09-28 Published:2017-10-11
  • Supported by:
    Supported by the National Natural Science Foundation of China (51306104).

摘要: Freezing processes of several liquids under static magnetic field (SMF) less than 50 mT were investigated. Central temperature of liquid samples held in glass test tubes immersed in a liquid bath was measured and collected. Nucleation temperature and phase transition time were obtained from freezing curves. Normality tests were performed for nucleation temperature of these liquids with/without magnetic field and normality distributions were justified. Analysis of variances was carried out for nucleation temperature of these liquids with magnetic field flux density as the influencing factor. Results showed that no significant difference was found for deionized water with or without SMF. However, differences exist in 0.9% NaCl solution and 5% ethylene glycol solution with and without SMF. Nucleation temperature of 0.9% NaCl with SMF is lower than that without SMF, while its phase transition time is shorter than that without SMF. Nucleation temperature of 5% ethylene glycol with SMF is higher than that without SMF, while its phase transition time is not modified with SMF.

关键词: Liquid, Freezing, Static magnetic field, Nucleation temperature, Phase transition time

Abstract: Freezing processes of several liquids under static magnetic field (SMF) less than 50 mT were investigated. Central temperature of liquid samples held in glass test tubes immersed in a liquid bath was measured and collected. Nucleation temperature and phase transition time were obtained from freezing curves. Normality tests were performed for nucleation temperature of these liquids with/without magnetic field and normality distributions were justified. Analysis of variances was carried out for nucleation temperature of these liquids with magnetic field flux density as the influencing factor. Results showed that no significant difference was found for deionized water with or without SMF. However, differences exist in 0.9% NaCl solution and 5% ethylene glycol solution with and without SMF. Nucleation temperature of 0.9% NaCl with SMF is lower than that without SMF, while its phase transition time is shorter than that without SMF. Nucleation temperature of 5% ethylene glycol with SMF is higher than that without SMF, while its phase transition time is not modified with SMF.

Key words: Liquid, Freezing, Static magnetic field, Nucleation temperature, Phase transition time