Study And Optimize Of The Ground Source Heat Pump Air Conditioning System Apply In Large Gym In Hot Summer And Warm Winter Zone

The paper is research on the operating characteristic and optimization of the ground source heat pump air conditioning system that applied in large scale gymnasium in hot summer and warm winter zones,combining with operating characteristic of the real application of the Guangxi autonomous region's gymnasium project.Utilizing the SPSS software aiding the Multivariate nonlinear Regression analysis,via MATLAB's optimization methods for optimizing and stimulating to obtain the most economic,practical and reliable mode and the optimal system parameter.The purpose of this research lies in making it available for the system to exert its best working condition and providing reference for real project design.The main content as follow.(1)The paper research on the operating characteristic and optimization of the ground source heat pump air conditioning system that applied in large scale gymnasium in hot summer and warm winter zones,which can greatly reduce the energy consumption and runs stably.In this experiment,the COP of the unit and system are 5.6 and 4.2,and the power of the unit is approximately 286kw each hour.The EER of the unit and system are 4.3 and 3.2,and the power of the unit is approximately 308kw each hour.(2)Research on the relationship between the COP(EER)and the circulation medium pump flow.Through change the air conditioning pump or can pump frequency and change the flow,to study the effect of flow on the cop of unit and system under the Condition of heating and cooling.Single change air conditioning pump flow,when the flow is about 367m3/h,system COP is about 4.1 and to the maximum,a single change to pump flow,the flow is about 256m3/h,when system COP is the largest,is about 4.3.Single change air conditioning pump flow,when the flow is about 315m3/h,system COP to the maximum,about 3.3;Single change to pump flow,the flow is about 369m3/h,system EER is the largest,is about 3.2.(3)To collect related data under changing the air conditioning pump frequency and the buried pipe circulation medium pump frequency.The frequency of air conditioning pump and the buried pipe circulation medium pump as the independent variable,and the COP of system as the dependent variable.The optimization design mathematical model is established and the multivariate nonlinear regression analysis is simulated By SPSS software.The model was:COP(f1,f2)=-13.853+0.436f1+0.376f2+0.003f1f2-0.006f12-0.006 f22+?;The result:R 2= 0.93,so we can know the imitative effect were in good agreement with the experimental data.(4)Application of the theory of modern optimization design technology to establish and analyze the optimization model.Optimistic best parameters by the matlab software and applied to the ground source heat pump system and Measurement the related dates.And analyze the optimized system's performance.Compare before optimization and after optimization system performance and analysis of energy saving.After the optimization,the COP of system is about 4.3 and close to the optimal value(4.49)Mathematical model.The buried pipe circulation medium pump operating efficiency is 38kW,the running power have reduced 17%.It improves the COP of the system and reduces output power of the pump,and makes the system more efficient.