Phase change emulsions for latent heat transportation:Preparation and characterization

doi:10.3969/j.issn.2095-4239.2014.02.006

Abstract

Abstract: Paraffin-water emulsions were prepared by using a phase transformation emulsification method. Span80 and Tween80 were used as the emulsifiers. Paraffin content up to 40% could be obtained by using such a method. The emulsions were characterized for their viscosity and latent heat by using the NDJ-1 viscometer and the Q10 differential scanning calorimeter (DSC), respectively. The results showed that uniform and stable paraffin wax emulsions could be obtained when the HLB of emulsifiers was about 10 (i.e. the weight ratio of Span80 to Tween80 was round 46.8∶53.2). The viscosity of the emulsions increased sharply with increasing wax content, whereas the latent heat was at maximum when the oil and water phases coexisted. When the emulsion contains the oil phase only, the latent heat increased with increasing water content, while the latent heat of the emulsions decreased with increasing water content when the emulsion contains the water phase.

Key words: paraffin wax emulsion, phase change, viscosity, latent heat

CLC Number:

TM02

MAO Lingbo, LIANG Zhibin, LIN Jingtang, LI Futao, KONG Xiangzhan, JIA Demin. Phase change emulsions for latent heat transportation:Preparation and characterization[J]. Energy Storage Science and Technology, 2014, 3(2): 128-132.

References

[1] Zhang Yinping(张寅平),Wang Xin(王馨),Chen Binjiao(陈斌娇), et al . Research on preparation,heat transfer and flow characteristics of latent functionally thermal fluid[J]. High Technology Letters (高技术通讯),2006,16(5):485.
[2] Regin A F,Solanki S C,Saini J S. Heat transfer characteristics of thermal energy storage system using PCM capsules:A review[J]. Renew. Sust. Energ. Rev. ,2008,12(9):2438-2458.
[3] Yamagishi Y,Takeuchi H,Pyatenko A T,Kayukawa N. Characteristics of microencapsulated PCM slurry as a heat-transfer fluid[J]. AIChE Journal ,1999,45(4):696-707.
[4] Charunyakorn P,Sengupta S,Roy S K. Forced convection heat transfer in microencapsulated phase change material slurries:Flow in circular ducts[J]. Int. J. Heat Mass Transfer ,1991,34(3):819-833.
[5] Wang Yi(汪意),Yang Rui(杨睿),Zhang Yinping(张寅平), et al . Recent progress in phase-stabilized phase change materials[J]. Energy Storage Science and Techonology (储能科学与技术),2013,2(4):362-368.
[6] Zou Deqiu(邹得球),Xiao Rui(肖睿),Feng Ziping(冯自平). Progress on paraffin emulsion in field of latent heat transportation[J]. New Chemical Materials (化工新型材料),2012,40(1):39-41.
[7] Li Huang,Marcus P. Evaluation of paraffin/water emulsion as a phase change slurry for cooling applications[J]. Energy ,2009,34
(9):1145-1155.
[8] Guo Yafei(郭亚飞),Zheng Wenwei(郑文伟),Cheng Haifeng(程海峰),Liu Dongqing(刘冬青). Research progress on wax functionally thermal fluid[J]. New Technology & New Process (新技术新工艺),2012,34(5):52-56.
[9] Shi Liming(石李明),Wang Wenjun(王文俊),Li Bogeng(李伯耿),Zhu Shiping(朱世平). Preparation,property and application of phase change material emulsions[J]. Journal of Materials Science and Engineering (材料科学与工程学报),2013,31(1):142-147.
[10] Inaba H. New challenge in advanced thermal energy transportation using functionally thermal fluids[J]. International Journal of Thermal Sciences ,2000,39(9-11):991-1003.
[11] Zhao Zhennan(赵镇南),Shi Yuquan(时雨荃),Zhang Yi(张毅). An investigation on rheology and heat transfer characteristics for a phase change emulsion[J]. Journal of Engineering Thermophysics (工程热物理学报),2001,22(5):589-592.
[12] Schalbart P,Kawaji M. Comparison of paraffin nano emulsions prepared by low-energy emulsification method for latent heat storage[J]. International Journal of Thermal Sciences ,2013,67:113-119.
[13] Zou Deqiu(邹得球),Xiao Rui(肖睿),Feng Ziping(冯自平),Guo Jiangrong(郭江荣). Thermal performance of high melting points paraffin emulsions for latent heat transportation[J]. Journal of Functional Materials (功能材料),2012,43(1):84-87.
[14] Zhao Jin(赵金),Chen Wenyi(陈文艺),Cao Yuekun(曹月坤),Hu Dan(胡丹). Progress in preparation of special paraffin wax emulsion and its application[J]. Science & Technology in Chemical Industry (化工科技),2012,20(5):60-63.
[15] Dai Yueling(戴跃玲),Sun Yonglin(孙永琳). Research and production of 6# wax emulsion[J]. Liaoning Chemical Industry (辽宁化工),1995,24(2):8-12.
[16] Jiang Jia(蒋嘉),Zhang Guoyin(张国寅). Factors affecting the viscosity of the emulsion[J]. Chemical Materials for Construction (化学建材), 1989,6(3):18-21.