Case Study: Smart1098™ Rare Earth Glass Coating for Skylight Thermal Control at a High-Speed Rail Station
Large-scale public infrastructure increasingly relies on expansive glass architecture to deliver daylight, openness, and visual impact. High-speed rail stations, airports, and transport interchanges frequently incorporate vast skylight roofs to improve passenger experience and reduce reliance on artificial lighting.
However, glass-intensive design introduces a persistent challenge: uncontrolled solar heat gain in summer and excessive heat loss in winter. Without effective thermal control, these buildings experience higher energy consumption, uneven indoor temperatures, and reduced occupant comfort.
This case study documents the successful application of Smart1098™ Next-Generation Rare Earth Glass Coating, developed by Easyto Thermal Solution, on the skylight roof of a major high-speed rail station in North China. The project demonstrates how advanced rare earth materials can significantly improve thermal performance while preserving transparency and architectural intent.
Project Overview
- Project Type: High-speed rail station
- Location: North China
- Glass Area Treated: Approximately 6,000 m²
- Application Surface: Large-span skylight roof glazing
- Product Used: Smart1098™ Next-Generation Rare Earth Glass Coating
The station features a wide-span glass roof designed to flood concourse and waiting areas with natural daylight. While visually striking, the skylight created substantial thermal challenges throughout the year, particularly under extreme seasonal conditions.
The Thermal Challenge of Skylight Architecture
Summer: Solar Heat Gain Through Overhead Glass
During summer months, intense solar radiation entered the station through the skylight roof, leading to:
- Significant indoor heat build-up beneath skylight zones
- Increased cooling demand and HVAC peak loads
- Passenger discomfort in waiting and circulation areas
- Temperature stratification across large open spaces
Conventional shading systems or reflective treatments were either impractical for the scale of the roof or compromised the visual openness of the architecture.
Winter: Heat Loss and Energy Inefficiency
In winter, the same glass skylight became a major pathway for heat loss:
- Warm indoor air rapidly transferred through the glazing
- Heating systems worked harder to maintain comfort
- Energy consumption increased during peak winter periods
The station required a single solution capable of delivering year-round thermal control—not separate summer and winter treatments.
Why Smart1098™ Rare Earth Glass Coating?
Limitations of Traditional Solutions
Standard approaches such as tinted glass, reflective films, or Low-E glass replacements present several drawbacks for large public buildings:
- Reduced visible light transmission
- Mirror-like or high-reflectance appearance
- Limited effectiveness on existing buildings
- High cost and operational disruption when replacing glass
For an active rail station, large-scale glass replacement was neither economical nor feasible.
Smart1098™: A Material-Science Solution
Smart1098™ is a transparent, rare earth–based glass coating engineered to manage solar energy at the spectral level. Instead of reflecting sunlight, it selectively filters the solar spectrum using rare earth 4f electron orbital resonance (LSPR effect).
This allows the coating to:
- Block and absorb infrared radiation (primary heat carrier)
- Block ultraviolet radiation responsible for material degradation
- Maintain high visible light transmission
- Convert absorbed energy into heat and dissipate it through radiative cooling
The result is high thermal performance without visual compromise—a critical requirement for public infrastructure.
Application Strategy
Smart1098™ was applied directly to the existing skylight glass:
- No removal or replacement of glass panels
- Suitable for large-area, overhead glazing
- Minimal disruption to station operations
- Uniform, transparent finish across all treated panels
The coating integrates seamlessly with the existing glass, preserving the original architectural appearance while significantly upgrading thermal performance.
On-site Application Video
The video below shows the on-site application of Smart1098™ rare earth glass coating on a large-span skylight roof, completed without removing or replacing existing glass panels.
Measured Performance Results
Post-application testing confirmed the following results:
- Visible Light Transmittance (VLT): ~68%
- Infrared Rejection: ~96%
- Ultraviolet Rejection: ~98%
These results demonstrate Smart1098™’s ability to deliver balanced performance—high heat rejection without darkening or reflectivity.
Visual Impact: Before and After
Before Application
- Clear skylight glass
- Strong solar penetration
- Noticeable heat concentration beneath roof zones
After Application
- Slightly softened daylight tone
- No mirrored or reflective appearance
- Uniform visual consistency across the skylight
- Improved perceived comfort without loss of brightness
From the passenger perspective, the space remains open and naturally lit—without the thermal discomfort typically associated with large glass roofs.
Seasonal Performance Benefits
Summer Performance: Heat Insulation
During summer:
- Infrared radiation is largely filtered before entering the space
- Indoor temperature rise is moderated
- HVAC peak demand is reduced
- Thermal hotspots beneath skylights are minimised
Winter Performance: Heat Retention
In winter:
- Reduced outward heat radiation through the glass
- Improved indoor heat retention
- Heating systems operate more efficiently
- More stable indoor temperatures across large halls
Smart1098™ delivers true all-season performance, addressing both cooling and heating efficiency.
Energy and Operational Impact
While energy savings vary depending on climate, usage patterns, and system design, the project delivered:
- Reduced cooling load during summer peak hours
- Lower heating demand in winter
- Improved thermal balance across large public spaces
- Long-term reduction in energy consumption and operating costs
For transport infrastructure operating daily at high occupancy, even modest efficiency gains translate into substantial annual energy savings.
Passenger Comfort and Experience
Beyond technical metrics, passenger experience was a critical success factor. Observed improvements included:
- Reduced heat stress in waiting areas
- More consistent temperatures across concourses
- Less glare without darkening the space
- Improved comfort during extended dwell times
Importantly, these benefits were achieved without visual clutter, shading devices, or architectural compromise.
Relevance for Australian Infrastructure
This case study is highly relevant for Australian conditions, where:
- Solar intensity is high year-round
- Many public buildings feature extensive skylights and glazed roofs
- Retrofitting existing infrastructure is often preferred over replacement
Smart1098™ is particularly suitable for:
- Transport hubs (rail stations, airports, interchanges)
- Large commercial atriums
- Shopping centres and convention facilities
- Industrial and logistics buildings with skylight roofing
Key Takeaways
- Large glass skylights do not have to compromise thermal comfort
- Smart1098™ delivers high IR and UV rejection while preserving daylight
- Existing glass can be upgraded without replacement
- Performance benefits apply in both summer and winter
- Ideal for large-scale, high-occupancy public infrastructure
Conclusion
This high-speed rail station project demonstrates how Smart1098™ Rare Earth Glass Coating, developed by Easyto Thermal Solution, can transform the performance of glass-intensive architecture. By combining advanced spectral control, transparency, and radiative cooling, Smart1098™ enables infrastructure operators to achieve energy efficiency, passenger comfort, and architectural integrity in a single solution.
As Australia continues to invest in transport, civic, and commercial infrastructure, technologies like Smart1098™ will play a critical role in delivering comfortable, energy-efficient, and future-ready buildings—without compromising design intent.
Looking to upgrade large skylights without replacing glass?
Smart1098™ is designed for large-scale skylights and overhead glazing where heat control, daylight preservation, and retrofit simplicity are critical.
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