6 results about "Thermal response test" patented technology

This application relates to the field of geothermal energy development and utilization technology, and in particular to a method, equipment, medium, and product for determining the impact of groundwater runoff on the heat exchange efficiency of buried pipes. The method includes: determining the Pelet number of each borehole; receiving test results from thermal response tests conducted on multiple boreholes, and calculating the heat transfer coefficient set for each borehole under each operating condition based on the test results; wherein the operating conditions include a cooling operating condition and at least two heating operating conditions; selecting effective operating conditions from multiple operating conditions based on the Pelet number and the heat transfer coefficient set corresponding to the effective operating conditions; performing data fitting based on the Pelet number of multiple boreholes and the heat transfer coefficient set corresponding to the effective operating conditions to construct an evaluation model characterizing the impact of groundwater runoff on the heat exchange efficiency of buried pipes and determining the critical Pe value, so as to guide the engineering installation of buried pipe heat exchangers through the evaluation model and the critical Pe value. This application can quantify the impact of groundwater runoff on the heat exchange efficiency of buried pipes.

This invention discloses a four-step inversion method for thermal properties based on analytical models and unsteady-state numerical models, comprising the following steps: 1) Using water temperature observation data after the 10th hour of the thermal response test, the thermal conductivity of the soil and rock is calculated using the linear slope method based on a linear heat source analytical model; 2) Using water temperature observation data after the 10th hour of the thermal response test and the obtained thermal conductivity of the soil and rock, assuming the thermal conductivity and volumetric specific heat of the backfill material in the borehole, the volumetric specific heat of the soil and rock is inverted based on a one-dimensional unsteady-state numerical model in the entire space; 3) Using water temperature observation data from the first two hours of the thermal response test, the obtained thermal conductivity and volumetric specific heat of the soil and rock, the thermal conductivity and volumetric specific heat of the backfill material in the borehole are simultaneously inverted based on a one-dimensional unsteady-state numerical model in the entire space; 4) Using water temperature observation data after the 10th hour of the thermal response test, the thermal conductivity of the soil and rock, the thermal conductivity and volumetric specific heat of the backfill material are obtained, and the volumetric specific heat of the soil and rock is inverted based on a one-dimensional unsteady-state numerical model in the entire space.

This invention discloses a method and system for assessing shallow geothermal energy resources in urban areas, relating to the field of geothermal energy resource technology. The method includes: constructing a basic dataset and performing spatial grid division to construct multiple geothermal evaluation units; deploying multiple thermal response test wells within the multiple geothermal evaluation units, conducting cyclic heat injection tests, constructing multiple formation temperature response sequences, constructing multiple temperature response feature vectors, and performing formation thermal conductivity inversion to obtain multiple formation thermal conductivity parameters; calculating multiple theoretical heat transfer capacities for the multiple geothermal evaluation units; constructing multiple groundwater heat transfer capacity feature vectors and performing heat transfer analysis to obtain multiple engineering heat transfer capacities; and combining the multiple theoretical heat transfer capacities and multiple engineering heat transfer capacities to conduct thermal energy resource assessment and obtain regional assessment results. This invention solves the technical problem of insufficient accuracy in assessing shallow geothermal energy resources in urban areas in existing technologies, achieving the technical effect of improving the accuracy of shallow geothermal energy resource assessment in urban areas.

The application discloses a kind of U-shaped middle-deep buried pipe heat pump system optimization design methods, including carrying out thermal response test and obtaining rock-soil thermal physical property parameters, predict buried pipe dynamic heat extraction amount, carry out heat exchange coupling simulation and obtain prediction buried pipe heat pump system temperature dynamic distribution and determine heat pump machine capacity, according to buried pipe system parameter and the heat pump machine capacity design and build buried pipe heat pump system, run the buried pipe heat pump system and obtain buried pipe heat pump system operation data and fit and obtain heat pump machine performance function, according to the building heat load and buried pipe outlet water temperature of optimization period to be constructed flow optimization objective function and optimize the buried pipe heat pump system and obtain optimal flow parameter, according to the optimal flow parameter adjustment buried pipe heat pump system.This method can significantly reduce the energy consumption of ground source side circulating pump, and lay a theoretical foundation for the large-scale application of U-shaped middle-deep buried pipe heat pump system.

The invention provides a step heating design method and device for simulating ballistic ablation response and a medium, and the method comprises the steps: obtaining a target response parameter in a flight ballistic environment, determining a heating time length, debugging a test state, and carrying out ablation thermal response trial calculation, and preparing an initial simulation ablation retreat amount and a simulation key position highest temperature for iterative calculation. Step heating state parameters of the ground simulation test are determined through iterative calculation on the basis of the target response parameters, and the first iteration step is used for determining the total enthalpy coefficient of the total enthalpy of the ground incoming flow with the matched target ablation retreat amount as the target; and the second iteration step takes the highest temperature of the matched target key position as a target and is used for determining a heat flux density coefficient of the ground heat flux density. According to the technical scheme, the total heating amount, the ablation amount and the highest temperature response of the key position in the step heating state can be completely matched with the response parameters in the flight trajectory state.

The invention relates to a buried pipe heat exchange system design method based on multi-source data fusion and intelligent optimization. The method is suitable for the technical field of buried pipe heat exchange system design. According to the technical scheme, the buried pipe heat exchange system design method based on multi-source data fusion and intelligent optimization comprises the steps that S100, geological survey data and thermal response test data of a target area are obtained; s200, generating a design parameter combination of the buried pipe, and performing numerical model simulation in combination with the geological survey data and the thermal response test data to obtain model simulation data; s300, inputting the model simulation data, the geological survey data and the thermal response test data into the trained machine learning model to obtain a performance analysis result corresponding to the design parameter combination; s400, when the performance analysis result does not meet the preset requirement, returning to the step S200, and generating a new design parameter combination; and when the performance analysis result meets the preset requirement, a design scheme of the buried pipe heat exchange system is obtained.