Boonthavorn, a major Thai retailer of tiles, bathroom sanitary ware, kitchens and home decor, applied THERMAL-XR® graphene coating to an air-cooled chiller at its Ratchada store in Bangkok and measured a 14.00% reduction in energy use, translating to an estimated saving of 422,556 THB per year and a return on investment of under 1 year.
Case at a glance
| Customer | Boonthavorn Retail Corporation Public Company Limited |
|---|---|
| Location | Boonthavorn Ratchada (Unit 3), Bangkok, Thailand |
| Site type | Home improvement retail store |
| Equipment | Air-Cooled Chiller |
| Brand | Carrier |
| Capacity | 200 tons |
| Model | 30XA0752 |
| Equipment age | 12 years |
| Energy savings | 14.00% |
| Cooling efficiency | 1.191 → 1.024 kW/ton |
| Annual cost saving | 422,556 THB/year |
| Return on investment | < 1 year |
Background
Air conditioning is one of the largest electricity costs for a large-format store, where showrooms must stay cool for shoppers and staff throughout long trading hours. Over time, condenser coils lose heat transfer efficiency, which forces compressors to work harder and increases energy consumption. At Boonthavorn’s Ratchada store, chiller Unit 3 is a Carrier air-cooled chiller with a capacity of 200 tons, which has been in service for 12 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 air-cooled chiller, with no change to the equipment itself.
Results
Energy use was compared before and after coating:
- Electricity usage: 2,150 kWh/day before coating vs 1,849 kWh/day after
- Electricity cost: 251,521 THB/month before coating vs 216,308 THB/month after
- Carbon emissions: 350 tons CO2/year before coating vs 301 tons CO2/year after
- Cooling efficiency: 1.191 kW/ton before coating vs 1.024 kW/ton after
- Annual saving: 422,556 THB per year
- ROI: < 1 year
These results equal an energy saving of 14.00%, with the chiller using about 14% less power for every ton of cooling it delivers.
Takeaway
This second Boonthavorn case shows that results repeat across stores and chiller brands: coating a 12-year-old Carrier chiller at Ratchada cut electricity costs by more than 420,000 THB a year and paid for itself in under a year.
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.