Electricity-free Cooling Technology

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Overview

Inspired by Sahara-silver ant, we invented a cooling technology that can produce cooling for buildings without using any electricity and refrigerant, achieving indoor thermal comfort and carbon neutrality.

  • Electricity-free Cooling Technology 0
  • Electricity-free Cooling Technology 1
  • Electricity-free Cooling Technology 2
Research completion
2021
Commercialisation opportunities
Product application
Problem addressed

Our self-developed and high-performance technology features the edge in solar reflection and thermal emission, resulting its significant sub-ambient cooling effect, without consuming electricity and ozone-depleting refrigerants., promoting carbon neutrality.

Innovation
  • Our self-developed and high-performance technology is integrated into the paint used in coating for buildings, which is easy-to-apply and low-cost.
  • Our self-developed and high-performance technology covers a wide range of applications, e.g., buildings, outdoor electrical equipment, outdoor storage equipment, Modular Integrated Construction (MIC), site office container, solar panel, etc.
  • Excellent optical performance and strong cooling power
Key impact
  • The surface temperature of buildings can be reduced by 30°C with our technology.
  • The indoor temperature can be reduced by 6°C with our technology applied on buildings' coating.
  • The energy consumption of air conditioning can be reduced by 30% with our technology.
  • The lifespan of our product with the innovative cooling technology lasts over 10 years.
Award
  • Champion of SME Innovation and Entrepreneurship Global Contest (Hong Kong Chapter)
  • Hong Kong Science Park IDEATION Seed Fund 2021
  • 1st Runner Up of Young Professionals Exhibition & Competition 2021
  • 1st Runner Up of The 7th Hong Kong University Student Innovation and Entrepreneurship Competition 2021
  • Champion of HKIE (Environmental Division) Environmental Paper Award 2021
  • HK Tech 300, City University of Hong Kong Seed Fund
  • Idea Stage Winner of Hong Kong SDG Hub Climate Action Recognition Scheme 2020-21
  • Gold with Congratuations of the Jury at Invention Geneva Evaluation Days 2021
Application
  • CEDD & EMSD - Paint Project of Buildings with our passive radiative cooling paint
  • Henderson Land Development - Paint Project of Site Containers with our passive radiative cooling paint
  • Paint Project of Central Market with our passive radiative cooling paint
  • Hongkong Land - Paint Project of Buildings with our passive radiative cooling paint

Patent

  • Patent in Hong Kong - HK30045313
  • Patent in Hong Kong - HKS01056
  • Patent in China - GAI21CN6459
City University of Hong Kong (CityU)

As one of the fastest growing universities in the world over the past decade, City University of Hong Kong (CityU) is recognised as a hub for innovation in research and professional education. CityU identifies solutions to critical global challenges by extending the frontiers of knowledge both within and beyond existing research paradigms.

The University’s highly qualified academics are drawn from all over the world, not only bringing a wealth of research and professional experience to the teaching programmes, but also contributing to the knowledge and technology advancement.

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