Objective
To evaluate the energy-saving potential and ice quality impact of the REALice vortex water treatment system at a regional Swiss ice rink under real-world operational conditions.
Technology Description – REALice®
- Uses vortex motion to remove microbubbles and degas water without chemicals or energy input.
- Allows rinks to resurface using cold water (~15°C / 59°F) instead of traditional hot water (~60°C / 140°F).
- Results in faster freezing, denser ice, and reduced maintenance needs.
Test Location & Scope
- Location: KEBO Oerlikon, Zurich – Hall 2
- Timeframe: August 2019 vs. August 2020 (controlled comparative weeks)
- Parameters measured:
- Energy consumption (kWh)
- Ice and outdoor temperatures
- Ice quality and maintenance effort
Key Findings
| Aspect | Observed Result with REALice |
|---|---|
| Energy Savings | Up to 52% lower energy use during resurfacing on hot days |
| Ice Quality | Harder, denser ice, fewer gouges and blowouts |
| Ice Maintenance | Faster freezing, less snow buildup, compact shavings |
| Temperature Stability | Maintained consistent ice temperatures (−3.5°C to −3.8°C) |
| Operator Feedback | Universally positive across 5+ veteran ice techs |
Feedback from Ice Technicians
- No spider cracks on base layers
- Ice is more compact, with better skate performance
- Denser ice shavings allow larger machines to clean more per round
- Fewer deep cuts, especially from figure skaters
- Ice temperatures required less adjustment, reducing refrigeration stress
Conclusions
- REALice enables significant operational energy savings, particularly during hot weather.
- Ice quality is consistently improved, even with reduced ice thickness.
- The system supports lower maintenance, better ice performance, and GHG reduction.
- Recommended for continued use and deeper integration in municipal or competitive rinks.
