Phra Nang Klao Hospital in Thailand applied THERMAL-XR® graphene coating to its VRV/VRF air conditioner and measured a 23.46% reduction in energy use, translating to an estimated saving of 32,715 THB per year and a return on investment of under 2 years.
Case at a glance
| Customer | Phra Nang Klao Hospital |
|---|---|
| Location | Thailand |
| Site type | Hospital |
| Equipment | VRV/VRF Air Conditioner |
| Brand | Trane |
| Capacity | 150,000 BTU |
| Model | 4TVH0155AD000AA |
| Equipment age | 5+ years |
| Energy savings | 23.46% |
| Annual cost saving | 32,715 THB/year |
| Return on investment | < 2 years |
Background
Air conditioning is one of the largest electricity users in a hospital, where cooling runs around the clock to keep patients and staff comfortable. Over time, condenser coils lose heat transfer efficiency, which forces compressors to work harder and increases energy consumption. At Phra Nang Klao Hospital, the VRV/VRF air conditioner is a Trane unit with a capacity of 150,000 BTU, and it has been in service for more than 5 years.
The solution: THERMAL-XR®
THERMAL-XR® is a graphene-enhanced coating from Graphene Manufacturing Group (GMG), designed to deliver superior heat transfer and protection for heat exchanger coils. The coating was spray-applied to the condenser coils of the VRV/VRF outdoor unit, with no change to the equipment itself.
Results
Energy use was compared before and after coating:
- Electricity usage: 85 kWh/day before coating vs 65 kWh/day after
- Electricity cost: 11,621 THB/month before coating vs 8,894 THB/month after
- Carbon emissions: 14 tons CO2/year before coating vs 11 tons CO2/year after
- Annual saving: 32,715 THB per year
- ROI: < 2 years
These results equal an energy saving of 23.46%.
Takeaway
The Phra Nang Klao Hospital case shows that coating existing VRV/VRF systems can lower energy consumption and electricity costs in healthcare facilities without replacing equipment, even on relatively young units that have been running for just over 5 years.
Want similar results at your site?
Get in touch with GMG to discuss your cooling equipment, or find a THERMAL-XR® applicator near you.
- Email: [email protected]
- Phone: +61 7 3063 6638
- Find an applicator: graphenemg.com/graphene-products/THERMAL-XR®/find-an-applicator
Measured energy savings presented in this case study are not predictors of future installation results. Estimated savings should be considered as estimates. Standard GMG disclaimer applies. All contents copyright © Graphene Manufacturing Group Ltd. All rights reserved.