Energy Consumption Analyzing And Project Optimizing On Air-conditioning And Refrigeration System In Gao Xin International Business Center

Currently, building energy consumption has accounted for 30% of the national economy, and Air-conditioning energy consumption of public buildings has a Large proportion. Public buildings air-conditioning system has great potential for energy saving, under the background of the building energy efficiency and the energy for air-conditioning system, this thesis is discussed.In this paper, the status of energy consumption was simulated from dynamic simulation software Energy-Plus for Gao Xin International Business Center. Also analyzed the energy consumption Condition of different air-condition project, and got the optimizing project. Major are as follows:First, Xi'an Gao Xin International Business Center was selected to study the energy consumption of its air-conditioning and refrigeration system. The indoor thermal environment was measured and operational parameters of the refrigeration system were monitored in summertime. The energy consumption was analyzed to acknowledge its part-load operation condition. The software of Energy-Plus was used to simulate the cooling capacity of chillers and the amount of its steam consumption. The simulation results were compared with monitoring data. It reveals the frequency distribution of their deviation ranges.Then, the energy consumption of air-conditioning and refrigeration systems was simulated for cooling season by E+ for Gao Xin International Business Center, results indicate the load changes and the cooling load of the frequency table. And to study the chilled water and cooling water parameters on the total energy consumption and air conditioning systems the impact of energy consumption of each device, and supply air temperature on the energy consumption of air conditioning and refrigeration.Finally, Li-Br absorption refrigeration of steam,compressed air-conditioning refrigerator,ice-storage air-conditioning refrigerator and heat pump air-conditioning refrigerator for four cold source types, CAV systems, VAV systems and radiant cooling system for the three terminal types, the different cold source and air-conditioning end equipment combination of air-conditioning system ,obtained the 12 types of air- conditioning systems. Its energy simulation analysis, and the total energy consumption of each part of the energy value, and as a basis for comparative analysis of the air conditioning energy consumption. Take the coefficient of energy consumption (CEC) and energy utilization index (EUI) as measure of energy performance of the air-conditioning system. and with the various types of air-conditioning system according to the applicable conditions, the air-conditioning combined the compressed refeigerator with radiant cooling system wes the optimal project of air-conditioning syetem for this building.