Armstrong pumps were selected as part of a retrofit for this administrative building at Zheng Zhou University. Though the university administrators were primarily interested in a chiller upgrade, they opted to upgrade to Design Envelope pumps for the potential energy savings.
The retrofit Design Envelope pumps reduced energy usage by 78%, saving over RMB 4,500 per pump annually. Because of the energy savings, the costs of the retrofit project were recovered in less than two years.
Armstrong maps each individual pump’s hydraulic, motor and inverter variations at the factory to achieve exceptional accuracy throughout the flow range.
With this calibration, Armstrong Design Envelope pumps also serve as flow meters, providing reliable system flow data (+/- 5%). The testing ensures optimal performance efficiency at start-up, while Armstrong’s Pump Manager helps maintain and extend efficiency throughout the pump’s operating life.
Quick Stats
Facility type: Education
Location: Zhengzhou, China
Size: 50,000 m2
Power consumption savings: 78%
Annual cost savings: RMB 45,499
Annual CO2 reduction: 43,303 kg CO2
Equipment
Key Outcomes
- Design Envelope Vertical In-Line pumps were easy to install and were pipe-mounted for additional cost savings and space savings.
- Compared with conventional fixed-speed pumps, the new Design Envelope pumps provided 78% energy savings.
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