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Proceedings Paper

Preparation and energy-saving application of polyurethane/phase change composite materials for electrical water heaters
Author(s): Yougen Hu; Tao Zhao; Xiaolin Wu; Maobai Lai; Chengming Jiang; Rong Sun
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Paper Abstract

Thermal energy storage plays an important role in heat management because of the demand for developed energy conservation, and has applications in diverse areas, from buildings to textiles and clothings. In this study, we aimed to improve thermal characteristics of polyurethane rigid foams that have been widely used for thermal insulation in electrical water heaters. Through this work, paraffin waxes with melting point of 55~65°C act as phase change materials. Then the phase change materials were incorporated into the polyurethane foams at certain ratio. The polyurethane/phase change composite materials used as insulation layers in electrical water heaters performed the enthalpy value of 5~15 J/g. Energy efficiency of the electrical water heaters was tested according to the National Standard of China GB 21519-2008. Results show that 24 h energy consumption of the electrical water heaters manufactured by traditional polyurethane rigid foams and polyurethane/phase change material composites was 1.0612 kWh and 0.9833 kWh, respectively. The results further show that the energy-saving rate is 7.36%. These proved that polyurethane/phase change composite materials can be designed as thermal insulators equipped with electrical water heaters and have a significant effect on energy conservation.

Paper Details

Date Published: 3 April 2012
PDF: 8 pages
Proc. SPIE 8409, Third International Conference on Smart Materials and Nanotechnology in Engineering, 84090Q (3 April 2012); doi: 10.1117/12.923774
Show Author Affiliations
Yougen Hu, Shenzhen Institues of Advanced Technology (China)
The Chinese Univ. of Hong Kong (Hong Kong, China)
Tao Zhao, Shenzhen Institues of Advanced Technology (China)
The Chinese Univ. of Hong Kong (Hong Kong, China)
Xiaolin Wu, Shenzhen Institues of Advanced Technology (China)
The Chinese Univ. of Hong Kong (Hong Kong, China)
Maobai Lai, Shenzhen Institues of Advanced Technology (China)
The Chinese Univ. of Hong Kong (Hong Kong, China)
Chengming Jiang, Shenzhen Institues of Advanced Technology (China)
The Chinese Univ. of Hong Kong (Hong Kong, China)
Rong Sun, Shenzhen Institues of Advanced Technology (China)
The Chinese Univ. of Hong Kong (Hong Kong, China)


Published in SPIE Proceedings Vol. 8409:
Third International Conference on Smart Materials and Nanotechnology in Engineering
Jinsong Leng; Yoseph Bar-Cohen; In Lee; Jian Lu, Editor(s)

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