Secondary Variable Pumping System

Secondary variable pumping systems are ideal for large multi-terminal airports where zoning flexibility is essential. Primary pumps maintain stable chiller flow, while secondary pumps distribute water across different terminal zones, retail sections, and boarding areas. Secondary Variable Pumping system, variable‑speed secondary pumps adjust water flow to the air‑side equipment based on real-time demand. While primary pumps provide constant flow through the chillers, the secondary pumps modulate with VFDs to optimize distribution efficiency. This setup offers energy savings, better temperature control, and flexible flow management across larger chilled‑water networks.

This setup enhances hydraulic separation, improves temperature control, and reduces pumping energy during partial load conditions. For large Indian international airports, secondary systems provide scalability and efficient climate management across extensive floor areas.