Project Overview
A global automotive manufacturer cut approximately 32 million kWh of electricity per year — and over USD 2.5 million in operating cost — by replacing 12 aging centrifugal and 150 screw compressors with SIND high-efficiency units across plants in Shanghai, Chongqing, and overseas. This is the measured outcome of a compressed air station retrofit designed and delivered by Silverstone Industrial (SIND).
The project upgraded air compression systems across multiple factories of a renowned automotive brand, including facilities in Shanghai, Chongqing, and several overseas locations. Beyond the headline energy figure, maintenance costs run approximately 45% lower than imported brands, and the client has repeatedly purchased SIND equipment for multiple factories worldwide.
Core Equipment
Centrifugal units carry the high-volume base-load plant air, while screw compressors cover distributed workshop air points — each selected per duty profile rather than replaced one-for-one.
Centrifugal Compressors
High-efficiency multi-stage units carry the high-volume, continuous plant-air demand.
Screw Compressors
Two-stage screw units cover variable, localized workshop points across multiple plants.
Measured Outcome
kWh saved per year
USD cost reduction per year
tons of CO2 avoided per year
| Compressor type | Role in the station | Measured energy savings | Best fit |
|---|---|---|---|
| Centrifugal (12 units) | Base-load, high-volume plant air | Up to 10.5% vs. traditional | Continuous large demand |
| Screw (150+ units) | Distributed workshop air points | Up to 20.3% vs. conventional | Variable, localized demand |
Both technologies were selected per duty profile rather than replaced one-for-one, which is why the combined station reached 32 million kWh in annual savings.
Client Benefits
- Lower Operating Costs: maintenance costs approximately 45% less than those of imported brands.
- High Reliability: extremely low failure rates, ensuring continuous and reliable operation.
- Sustainability: reduced energy consumption and carbon emissions support a greener future.
FAQ
A compressed air station is the full system of compressors, dryers, and controls supplying plant air. Retrofitting aging centrifugal and screw units with high-efficiency models is one of the fastest ways to cut industrial electricity use — air systems often account for 10–40% of a plant’s total power draw.
In this SIND project, the client saved approximately 32 million kWh and over USD 2.5 million per year after replacing 12 centrifugal and 150 screw compressors — equivalent to roughly 18,500 tons of CO2 avoided annually.
SIND designs and builds high-efficiency centrifugal and screw compressors directly, with maintenance costs about 45% lower than imported brands and proven savings of 10.5% (centrifugal) and 20.3% (screw) versus conventional models.