Preparation and optical properties of waterborne acrylic-based cool white coatings

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• 作者：Shengjun Cheng ; Hongjiang Liu ; Yanfeng Gao
• 关键词：Urban heat island ; Cool white coating ; Total solar reflectance ; Thermal emittance ; Insulation temperature difference
• 刊名：Chinese Science Bulletin
• 出版年：2014
• 出版时间：November 2014
• 年：2014
• 卷：59
• 期：31
• 页码：4142-4146
• 全文大小：322 KB
• 参考文献：1. Mastrapostoli E, Karlessi T, Pantazaras A et al (2014) On the cooling potential of cool roofs in cold climates: use of cool fluorocarbon coatings to enhance the optical properties and the energy performance of industrial buildings. Energy Build 69:417-25 CrossRef
  2. Santamouris M (2013) Using cool pavements as a mitigation strategy to fight urban heat island—a review of the actual developments. Renew Sustain Energy Rev 26:224-40 CrossRef
  3. Goldreich Y (2006) Ground and top of canopy layer urban heat island partitioning on an airborne image. Remote Sens Environ 104:247-55 CrossRef
  4. Huang L, Li J, Zhao D et al (2008) A fieldwork study on the diurnal changes of urban microclimate in four types of ground cover and urban heat island of Nanjing, China. Build Environ 43:7-7 CrossRef
  5. Kolokotroni M, Zhang Y, Watkins R (2007) The London Heat Island and building cooling design. Sol Energy 81:102-10 CrossRef
  6. Carnielo E, Zinzi M (2013) Optical and thermal characterisation of cool asphalts to mitigate urban temperatures and building cooling demand. Build Environ 60:56-5 CrossRef
  7. Joudi A, Svedung H, Bales C et al (2011) Highly reflective coatings for interior and exterior steel cladding and the energy efficiency of buildings. Appl Energy 88:4655-666 CrossRef
  8. Shi Y, Song Z, Zhang W et al (2013) Physicochemical properties of dirt-resistant cool white coatings for building energy efficiency. Sol Energy Mater Sol Cells 110:133-39 CrossRef
  9. Akbari H, Menon S, Rosenfeld A (2009) Global cooling: increasing world-wide urban albedos to offset CO₂. Clim Chang 94:275-86 CrossRef
  10. Levinson R, Berdahl P, Akbari H (2005) Solar spectral optical properties of pigments—part II: survey of common colorants. Sol Energy Mater Sol Cells 89:351-89 CrossRef
  11. Levinson R, Berdahl P, Akbari H (2005) Solar spectral optical properties of pigments—part I: model for deriving scattering and absorption coefficients from transmittance and reflectance measurements. Sol Energy Mater Sol Cells 89:319-49 CrossRef
  12. Bretz SE, Akbari H (1997) Long-term performance of high-albedo roof coatings. Energy Build 25:159-67 CrossRef
  13. Song Z, Zhang W, Shi Y et al (2013) Optical properties across the solar spectrum and indoor thermal performance of cool white coatings for building energy efficiency. Energy Build 63:49-8 CrossRef
  14. Berdahl P, Bretz SE (1997) Preliminary survey of the solar reflectance of cool roofing materials. Energy Build 25:149-58 CrossRef
  15. Santamouris M, Synnefa A, Karlessi T (2011) Using advanced cool materials in the urban built environment to mitigate heat islands and improve thermal comfort conditions. Sol Energy 85:3085-102 CrossRef
  16. Yew MC, Ramli Sulong NH, Chong WT et al (2013) Integration of thermal insulation coating and moving-air-cavity in a cool roof system for attic temperature reduction. Energy Convers Manag 75:241-48 CrossRef
  17. Guo W, Qiao X, Huang Y et al (2012) Study on energy saving effect of heat-reflective insulation coating on envelopes in the hot summer and cold winter zone. Energy Build 50:196-03 CrossRef
  18. Costanzo V, Evola G, Gagliano A et al (2013) Study on the application of cool paintings for the passive cooling of existing buildings in mediterranean climates. Adv Mech Eng, doi:10.1155/2013/413675
  
• 作者单位：Shengjun Cheng (1)
  Hongjiang Liu (1)
  Yanfeng Gao (1) (2)
  
  1. State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201800, China
  2. School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
  
• ISSN：1861-9541

文摘

Cool coatings (solar reflective coatings) possess a high total solar reflectance and a high thermal emittance, and they have potential applications in building surfaces, pavements, and oil tanks. By decreasing the accumulation of heat, these coatings can reduce the urban heat island effect to increase thermal comfort and to decrease energy consumption in hot zones. In this work, a cool white coating based on waterborne acrylic was prepared. The reflectance and thermal emittance were measured using an ultraviolet-visible-near-infrared spectrophotometer and the steady-state calorimetric technique, respectively. The cool coating possessed a total solar reflectance of 0.887 and a thermal emittance of 0.85. The linear fitting results indicated that the thickness of the dry film is an important factor that affects the reflectance and that the physical limit of total solar reflectance in practical cool coatings is 0.91. A homemade device developed according to military specification MIL-E-46096C was used to measure insulation temperature differences, and an insulation temperature difference of 29?°C was obtained. The above results demonstrated that the cool coating can be applied to buildings.