Energy-saving Analysis of Chilled Water System for Large Temperature Difference Air Conditioning

Abstract

In order to analyse the energy-saving performance of chilled water system, the energy consumption of pumps in air-conditioning systems with large temperature difference is studied and analyzed theoretically. By calculating the energy consumption of each part of the chilled water system with large temperature difference, it shows that the chilled water with large temperature difference has good energy-saving effect. The influence of large temperature difference on air conditioning system is also analyzed, specific improvement measures are introduced, and some problems that should be paid attention to when choosing large temperature difference air conditioning chilled water system are pointed out. At the same time, the energy consumption of chillers and chilled water pumps is compared. Taking the total energy consumption of air conditioning unit as the objective function, the scheme of chilled water system for large temperature difference air conditioning is optimized and calculated. The results show that the optimal temperature difference between supply and return water for chilled water system of air conditioning is 7.2°C. The application situation of the scheme of chilled water system for large temperature difference air conditioning is discussed.