Energy Consumption Simulation And Energy-saving Analysis On A Public Building In Changsha

With the improving of people' s living standards,people's demand for building standards has increased a lot in the late twentieth centry,Thus promoting the rapid development of China's construction industry.With the increasing in the number of buildings the number of building energy consumption,its energy consumption accounts 20%to 30%for the country's total energy consumption and shows an upward trend year by year,which has made Building energy conservation became the focus in energy-saving field.Therefore,it is an urgent matter which ensures the comfort of the indoor environment and building energy efficiency by Energy-saving design of the building's air conditioning system.This paper mainly demonstrate a simulated and optimized case on the air conditioning system of a public building in Changsha.The following simulation calculation of the building was used by Dest:Simulation of room temperature and load,annual dynamic load hour by hour,the analysis of load distribution characteristics provide the basis for options of air conditioning system,analysis of air treatment program and selection of cold and heat sources;Selecting the higher satisfaction,better economy and the advantages of more air-conditioning system program which lay the foundation for further optimization of the air conditioning system design through the simulation and analysis of the satisfaction and economy of four different air-conditioning systems,in the simulation analysis and selection of the air conditioning system scheme.For the selected air conditioning system solution,what I have done is that simulating and analyzing the energy consumption and economy of air conditioning systems with different heat recovery modes,such as heat recovery,sensible heat recovery and total heat recovery,simulating and analyzing the energy consumption and economy of the air conditioning system with two kinds of fresh air control schemes of fixed air volume and variable air volume and simulating and analyzing the energy consumption and economy of the two modes of continuous operation and intermittent operation of air conditioning system.Determining the lowest energy consumption and the best air-conditioning system program which is combined with three aspects of optimization analysis.Through the simulation analysis,the public buildings used in the form of air-conditioning systems and energy-saving measures are as follows:Commercial floor adopts full heat recovery of the whole air VAV air conditioning system,office floor adopts fan coil + fresh air system,fresh air control adopts the amount of new air flow mode,air conditioning system using intermittent mode of operation,new air-conditioning operation is used to eliminate indoor sensible heat load and latent heat load in the transitional season and set the air conditioning system automatic control device.