Study On Air Conditioning Cold And Heat Sources Scheme Of Large-scale Office Building In Hot Summer And Cold Winter Zone

The air-conditioning systems in the hot summer and cold winter area has a great influence on the thermal comfort and work efficiency of office staff in summer and winter in large office buildings,and that the energy consumption of air conditioning systems accounts for the largest proportion of the energy consumption of large office buildings.Therefore,in the condition of satisfying the thermal comfort of office staff,choosing the appropriate cold and heat source technology for the air-conditioning system has positive significance and application value for building energy conservation and consumption reduction.This paper uses a multi-level comprehensive evaluation system to study the cold and heat source of air-conditioning systems suitable for large-scale office buildings in hot summer and cold winter regions.Finally,through practical engineering cases,the air-conditioning cold and heat source options selected by the analytic hierarchy process are compared and analyzed.The main work is as follows:(1)Through literature research,the characteristics and the laws of energy utilization in the large-scale office buildings in hot summer and cold winter regions are analyzed.And the working principles and the performance characteristics of seven commonly used air-conditioning system cold and heat source technologies are also introduced.(2)Analyze the factors affecting the cold and heat source technical solutions of large-scale office building air-conditioning systems,set up survey questionnaires,and score them by expert evaluation.Apply multi-level analysis methods to sort the cold and heat source technical solutions for air-conditioning systems commonly used in large office buildings in hot summer and cold winter regions.(3)According to the climate characteristics of the hot summer and cold winter regions,choose a typical large-scale office building in Wuhan as a case.Use Google Sketch Up to build a model,import Energy Plus,and set the corresponding climate parameters and actual building envelope in Wuhan area.Set the air conditioning system plan as an ideal air conditioning system,performing load simulation,and analyzing the load distribution characteristics.(4)Based on the above analysis of the load characteristics of large office buildings in the hot summer and cold winter regions and the analysis of the cold and heat source technical solutions of common air-conditioning systems,and combining the results of the analytic hierarchy process,three different air-conditioning system cold and heat sources are simulated in Energy Plus.The program,in which each type of cold and heat source technology program is provided with several different unit combinations,simulates the energy consumption of different unit combination schemes of the same kind of cold and heat source technical solutions,and compares and analyzes each type of cold and heat source technical solutions.The best combination of units,and then compare the energy consumption analysis of the best unit combination scheme of three kinds of cold and heat source technical solutions.