Research On Adaptability Of Large-scale Underground Pipe Group Interconnection System

With the rapid growth of China’s economy and the development of HVAC technology,it gradually meets the high research of living environment and quality of life.And this also led to the increasing consumption of primary energy.Therefore,energy saving and emission reductions have become the main driver of the development of conditioning systems,and the application of renewable energy to the construction industry is also continuously encouraged by the government.The ground source heat pump system is a good way of using renewable energy,because of its energy saving and environmental protection has attracted more and more attention.At present.This paper analyzes the development status of ground source heat pump systems at home and abroad,and finds that there are fewer studies on interconnecting and interconnecting systems for large buried pipe groups.Therefore,on the basis of constructing the basic form of large-scale buried pipe group interconnectivity system,this paper studies the energy efficiency and economics of large-scale buried pipe group interconnectivity system.An example analysis was made with the ground source heat pump energy supply system in an integrated building site in Chongqing,and the following aspects were specifically studied:First,this article introduces various methods for benefit analysis of ground source heat pumps,mainly from the aspects of energy efficiency,economy,and emission reduction.The energy efficiency of the ground source heat pump and the calculation formula of emission reduction are summarized.Secondly,this paper tests and analyzes the existing ground source heat pump system,and points out that compared with the traditional chiller and gas boiler heating system,the traditional ground source heat pump system has better energy saving and environmental protection.And the energy saving rate of the ground source heat pump system is closely related to the installed capacity ratio and the system energy efficiency.Then,Take the ground source heat pump energy supply system of a comprehensive building plot in Chongqing as an example,after studying the load distribution of the project;three different air-conditioning system schemes are designed.Through the analysis of the economics,energy-saving and environmental protection of the three systems,it is pointed out that the attributes of the interconnection system are better than the traditional air-conditioning system.Finally,after the research and analysis of the interconnection system,the results prove that the interconnection system is more economical and energy-saving than the traditional chiller and gas boiler heating system.Although the initial investment of the interconnection system is 15.49 million yuan higher than that of the traditional air-conditioning system,the annual operating cost will be reduced by 3.33 million yuan,and the difference investment recovery period is 4.7 years.For the air conditioning system with a service life of more than10 years,it has the advantage of capital cost.At the same time,it can consume 1587.4 tons of standard coal less than traditional air-conditioning systems,can reduce carbon dioxide emissions by 3920.9 tons,reduce sulfur dioxide emissions by 31.7 tons,and reduce dust emissions by 15.9 tons.In addition,the pipeline start-stop control strategy,unit start-stop control strategy and system stability optimization strategy of the interconnected system are proposed.