Refine Implementation of Variable Flow Air Conditioning System with Primary Pump in Public Buildings

With the increasing demand for building energy efficiency, especially air conditioning energy efficiency, the research and application of Primary Pump Variable Flow Systems have been highly valued. Now, the comprehensive application of Primary Pump Variable Flow Systems in central air conditioning systems is analyzed and studied. Through design, analysis of equipment performance characteristics, and selection calculations, this study investigates and analyzes the working characteristics of chiller units, refrigeration and cooling water pumps, and air conditioning terminal equipment when flow conditions change. Fine implementation is carried out from the aspects of system equipment selection and construction management to ensure that the Primary Pump Variable Flow Air Conditioning System operates with "small flow, large temperature difference". The research results show that after the implementation of refined variable flow rate for air conditioning primary pumps, compared with the fixed flow rate system for primary pumps, the system's energy efficiency ratio is improved by 30.4%, and the annual power consumption is reduced by 29%, with significant energy-saving effects.