Dynamic Simulation And Operation Strategy Analysis Of Ground Source Heat Pump Cooling Tower Coupling System Based On Cloud Platform

Ground source heat pump technology is widely used worldwide because of its use of renewable energy,and corresponding research is also increasing.However,for hot summer and cold winter regions,traditional ground source heat pumps have serious soil heat accumulation and system energy consumption.In order to solve these problems,domestic and foreign scholars have proposed coupling systems for ground source heat pump cooling towers,and have achieved certain results.However,in order to make the ground source heat pump cooling tower coupling system more energy efficient,the system's optimal auxiliary heat dissipation control strategy has become one of the important issues that need to be urgently solved.This thesis aims to address the above stated problems.Taking Hefei,a city with hot summers and cold winters as an example,a typical office building is studied.The ground source heat pump cooling tower system model is established by TRNSYS software,and the mathematical model of the main modules and the parameter settings of each module are introduced.Next,the meteorological characteristics of Hefei area are introduced,and the annual dynamic load of the actual engineering building is calculated using the TRNSYS software,and the characteristics of the annual dynamic load are analyzed.Then use the existing cloud platform technology to run the actual project to obtain the system's one-week monitoring data under the two conditions of heating and cooling,and compare it with the actual engineering simulation data simulated by the TRNSYS software to verify the simulation system.The correctness and feasibility of the model.Finally,the project is simulated for several years of continuous operation,and the seasonal cooling operation of auxiliary cooling equipment,the daily operation time and the proportion of auxiliary cooling capacity operation control strategies are studied.Three systems of synchronization control,maximum temperature control,and temperature difference control are also studied.The control strategy analyzes the average temperature of the soil,the water temperature of the buried tube heat exchanger,the COP of the heat pump unit under refrigeration conditions,and the change in energy consumption of the system over time.The optimal operation strategy of the ground source heat pump cooling tower coupling system is derived: system Under the synchronous control strategy,86% of the auxiliary heat dissipation equipment operates in the spring and summer from 7:00to 10:00 daily.