Chilled Water Pump Head Calculation [updated] Today

The proper sizing of chilled water pumps is critical for the efficiency, reliability, and cost-effectiveness of HVAC systems. This paper presents a systematic methodology for calculating the total pump head required in a closed-loop chilled water system. It covers fundamental fluid mechanics principles, component pressure drop analysis, safety factors, and practical considerations such as open vs. closed systems, variable flow, and common pitfalls.

[ h_f = f \cdot \fracLD \cdot \fracv^22g ] Where: chilled water pump head calculation

[ H_total = H_pipe + H_fittings + H_chiller + H_coil + H_valves + H_other ] The proper sizing of chilled water pumps is

Where:

Select a pump with best efficiency point (BEP) at 50 m³/h and 34.5 m head. component pressure drop analysis

This is the energy lost due to water rubbing against the pipe walls.