Case study: National Grid

Armstrong recently completed a project in the United Kingdom, retrofitting a building belonging to National Grid.

The retrofit included new pump sets that reduced energy consumption by 32%, saving over 5,000 GBP annually.

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: Commercial office

Location: Solihull, Birmingham

Size: Three-storey building

Power consumption savings: 32%

Annual cost savings: 5,210 GBP

Annual CO₂ reduction: 14,048 kg CO₂

Equipment

• 3 × 250 hp Design Envelope Twin Pumps - chilled water
• 3 × 100 hp Design Envelope Twin Pumps – condenser water 
• Integrated Plant Controller

Key Outcomes

• Pre-assembly of pipework and pumps reduced on-site labour
• Minimal disruption during 
• regular business hours
• Energy savings and reduced CO₂ emissions
• Easy access to pump operating data showing flow, head, power usage and RPM
• Constant data-logging and performance monitoring 

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