Device for measuring thermophysical parameters and seepage parameters of soils

Abstract

The invention relates to the technical field of ground source heat pump design, in particular to a device for measuring thermophysical parameters and seepage parameters of soils. According to the device, a neural network parameter identification method is adopted to identify the thermophysical parameters and seepage parameters of soils; and in the identification process, thermal response test is carried out on to-be-identified soil to obtained measurement parameters after the thermal response test of the to-be-identified soil, and the measurement parameters are input into a pre-trained neuralnetwork to obtain thermophysical parameters and seepage parameters of the to-be-identified soil. The device is capable of directly identifying the thermophysical parameters and seepage parameters of soils during field thermal response test and then displaying results, so that the process is rapid and correct and the practicability is stronger; and the adopted identification method is capable of establishing a mapping relationship between the thermal response measurement parameters and the thermophysical and seepage directions and speeds of the soils through field thermal response test and theneural network, so that the identification errors caused by using traditional identification models are avoided, and the soil thermophysical identification precision is improved.

Description

technical field [0001] The invention relates to the technical field of ground source heat pump design, in particular to a measuring device for soil thermophysical property parameters and seepage parameters. Background technique [0002] The ground source heat pump system has high operating efficiency, good energy saving and environmental friendliness. As an important part of the ground source heat pump, the buried pipe heat exchanger has a direct impact on the energy efficiency and operating performance of the ground source heat pump system. and economic benefits. Soil thermophysical parameters are important parameters in the design of buried pipe heat exchangers. Their values ​​affect the number and depth of drilling design, and then affect the initial investment and operating performance of the heat pump system. Therefore, how to accurately obtain soil thermophysical parameters becomes very important. important. The current identification of soil thermophysical propertie...

AI Technical Summary

Problems solved by technology

The current identification of soil thermophysical properties is based on the thermal response test, and the heat transfer model is used to solve the inverse problem of soil thermophysical parameters. This process has the following defects: First, the existing identification models (linear heat source model and cylindrical heat source model) for thermal and physical property identification, due to the ideal construction in many aspects of the model, it brings more or less errors to the identification results, thus affecting the identification accuracy. Although the current improved identification model has improved accuracy, the complexity It is also greatly increased, and it is difficult to apply to actual engineering; secondly, the required measurement parameters of the existing thermal response e

Images