The Random Factors And Interval Analysis Method With The Buried Tube Of GSHP

In recent years, building energy conservation becomes the hot subject of society,the state gave high attention to the ground source heat pump as it is a green energy saving technology,they also introduced safeguard mechanism of the development of ground source heat pump to support it’s development and application,they decide to promotion this technology. In this field, research mainly focus on the heat transfer model of ground heat exchanger, backfilling materials,thermal physical of the rock and soil; the heat transfer model of groundwater heat pump system;material of the heat pump system, etc. Chinese scholars also primarily explored in theory and experiment of the new composite energy heat pump systems.This paper first reviews the principle and the classification of the ground source heat pump, also the research status from domestic and abroad of the buried tube type ground-source heat pump system. In chapter2, we analysed the randomness of the thermal resistance and building air conditioning load, because the structure of the geological materials is complex, it makes the randomness of the thermal physical parameters, and at the same time, building air conditioning load which decides the change heat capacity of the ground source heat pump system influenced by many factors, is also a random variable. this paper studied the distribution characteristics of the thermal resistance and building load.Study the small samples with the bootstrap method, we can get get variance and the confidence interval of the mean of the overall geotechnical thermal resistance. Make the building air conditioning load as a random variable,on the basis of the load data, we can simulate it’s distribution and get it’s mean and variance, then make use of reliability index, we can get the air conditioning design load. In chapter3, we use the relation of the pipe length, thermal resistance and building air conditioning load, then can get variance and the confidence interval of the mean.In chapter4, we put forward the reliability design method of the ground heat exchange system, combined with the engineering practice, we discussed the specific steps of the ground heat exchanger, then compared the results with the conventional design. In the last chapter, the article discussed the research conclusion, analysed the existing problems and the insufficiencies, then put forward the inspiration and prospected about the future research work.