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Passive Cooling Films and Fibers

Technology Overview

The global energy dilemma and climate warming are becoming increasingly serious, with fifteen percent of the electricity being used for the cooling system. With advantages like air-permeability and stretchability when woven into clothing, radiative cooling textiles have been recognized as an effective strategy for personal thermal management. Some existing solution adopt an active cooling strategy where they use forced convention. However, such solutions required the use of mechanical devices to move air, which makes the entire solution bulky and requires external power sources. In many applications, this strategy is not practical. While some have explored radiative cooling, the existing radiative cooling solutions are mainly constructed by randomly embedding nanoparticles and undergo solution-based treatment processes, which is not environmentally friendly. We have developed and demonstrated a new method for constructing radiative cooling solution. Our proprietary fibers and thin films are designed and constructed with periodic structures inside. These periodic structures will greatly improve the cooling performance compared with randomly distributed structures. Our solution has the potential to be scaled up for  large-scale production without introducing harmful reagents.We have demonstrated that by using our passive cooling technology it is possible to achieve a temperature difference 6 deg C without the use of any external or additional devices.  

Technology Features & Specifications

  • Passive cooling solution without electric energy consumption
  • The fabric is fabricated by thermal draw technique with large-scale production capacity
  • Periodic particle structures in fibers and thin films with improved cooling efficiency
  • The whole process is eco-friendly without introducing any harsh reagent
  • Thickness: 0.1mm – 1mm
  • Optical transparency: >90% with the thickness of 0.1mm
  • Tensile strength: 20-200 MPa
  • Cooling rate: 1-5W/m2
  • Max working temperature: 120oC
  • Thin film size: m2
  • Fiber length: km

 

 

Potential Applications

  • Wearable radiative cooling clothes.
  • Housings, electronic equipment cooling.
  • Energy conservation and environmental protection.

Customer Benefits

Our solution has the potential to be scaled up for  large-scale production without introducing harmful reagents.We have demonstrated that by using our passive cooling technology it is possible to achieve a temperature difference 6 deg C without the use of any external or additional devices.  

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