Preparation, properties and characterisation of microemulsion PCM slurry

Dengwu Wang; Jianlong Si; Sude Ma

Preparation, properties and characterisation of microemulsion PCM slurry

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Author(s): Dengwu Wang^{1, 2, 3} ; Jianlong Si⁴ ; Sude Ma^{2, 3}
- Affiliations: 1: Teaching Affair Office , Xijing University , Xi'an 710123 , People's Republic of China ;
  2: Material Corrosion and Protection Key Laboratory of Sichuan province , Sichuan University of Science & Engineering , Zigong 643000 , People's Republic of China ;
  3: Key Laboratory of Fluid and Power Machinery of Ministry of Education , School of Material Science & Engineering, Xihua University , Chengdu 610039 , People's Republic of China ;
  4: Global Opto-Electro Energy-Saving Technology Co., Ltd. , Yibin 644000 , People's Republic of China
Source: Volume 13, Issue 8, August 2018, p. 1132 – 1135
DOI: 10.1049/mnl.2018.0119 , Online ISSN 1750-0443

Received 08/02/2018, Accepted 25/04/2018, Revised 13/04/2018, Published 01/08/2018

The provisions and applications of renewable energy have great supply–demand gap problem, and thermal energy storage (TES) is a very promising solution to fully utilise the renewable energy and covers off-peak periods. The application of solid–liquid phase change material (PCM) is an effective way of TES based on the techniques of encapsulation and emulsion, but the capsules are easily broken and the emulsions are easily phase separated as they were phase changed for many times, so some other techniques should be developed. The microemulsion PCM slurry was prepared by the combination uses of emulsifiers (i.e. sorbitan monooleate 80 and polyoxyethylene sorbitan monooleate 80), coemulsifier (i.e. butanol), distilled water, purified paraffin and inorganic salts (i.e. potassium chloride). The average particle size in the slurry was about 50 nm, and the slurry was homogeneous after centrifugal acceleration of 1800g (i.e. ‘g’ is the gravity acceleration) for 5 min and phase change cycles for 1000 times. The latent heat of the slurry was 72.25 J g⁻¹ and the paraffin content in the microemulsion was 43.8 wt %. The slurry can overcome the shortcomings of some other techniques and be expected to be widely applied in the TES.

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