Simulation And Research On Electrical Energy-saving Of Central Air-conditioning System

Building energy consumption account for 30% ~40% of the total society consumption, and central air-conditioning energy consumption account for about 50% of large building. Railroad terminal is a large building, the central air-conditioning consume much energy of it. At present, there is little quantitative calculation on energy saving of central air-conditioning; much research is from the qualitative. The article completely changes the energy consumption of central air-conditioning into power consumption, quantitatively research on the energy consumption of the central air-conditioning.This article uses simulation method to take comparison and analysis of the air-conditioning system energy consumption. Firstly, according to the law of energy conservation and heat conservation, we used the provided data to establish air-conditioning model in the Matlab/Simulink and validated the model. Secondly, according to each part simulation model, combined with air conditioning system variable relationship, we set up two kinds of typical water system structure air-conditioning system energy consumption model. Thirdly, with the simulation model, static analysis and comparison have been taken in the primary only system. Finally, static analysis and comparison have been taken between primary only system and primary/secondary system within variable delivery air volume, variable fresh air volume, and variable frozen water flow.We draw the conclusion that in the primary only system compared adopting reasonable adjusting method with none adjusting method, the energy saving of adopting reasonable may reach to about 10%. Compared primary only system with primary/secondary system, the energy saving ratio of primary only system can reach to 5%~10%.