14 results about "Thermal response test" patented technology

The invention discloses a saturated seepage zone and unsaturated moisture zone identification method based on an active heating optical fiber, and the method comprises the steps: carrying out the thermal response test of a to-be-tested soil body through the power supply of an AH-UWFBG optical cable, and obtaining a response curve of a temperature rise value [delta] T of the to-be-tested soil body along with time t; the AH-UWFBG optical cable is placed in the saturated soil body, and the temperature rising value delta Tsat of the saturated soil body and the time t0 when the slope of a delta T-lnt curve of the saturated soil body reaches the stable state are measured; judging a boundary line of a saturated seepage zone and an unsaturated water zone in the to-be-detected soil body by judging the slope of the delta T-lnt curve and the size relationship between delta T and delta Tsat, and calculating the water content under the condition of no seepage and the seepage speed under the condition of seepage; the invention provides a new method for monitoring the hydrological process, and more accurate and comprehensive soil moisture and seepage data can be provided for the fields of environmental science, water resource management, agricultural production and the like.

The invention discloses a U-shaped mid-deep buried pipe heat pump system optimization design method, which comprises the following steps: carrying out a thermal response test to obtain rock-soil body thermophysical parameters, predicting the dynamic heat extraction amount of a buried pipe, carrying out heat exchange coupling simulation to obtain and predict the dynamic temperature distribution of a buried pipe heat pump system, and determining the capacity of a heat pump machine. Designing and building a buried pipe heat pump system according to buried pipe system parameters and the heat pump capacity, operating the buried pipe heat pump system to obtain operating data of the buried pipe heat pump system, and fitting to obtain a heat pump performance function; and a flow optimization objective function is constructed according to the building heat load in the to-be-optimized period and the outlet water temperature of the buried pipe, the buried pipe heat pump system is optimized to obtain an optimal flow parameter, and the buried pipe heat pump system is adjusted according to the optimal flow parameter. According to the method, the energy consumption of the ground source side circulating pump can be remarkably reduced, and a theoretical foundation is laid for large-scale application of a U-shaped middle-deep layer buried pipe heat pump system.

The invention relates to the technical field of geothermal well thermal response testing equipment, and particularly discloses a deep hole on-site thermal response test tester which comprises a thermophysical property testing device and a heat exchange device, the heat exchange device comprises a mounting base, a water inlet pipe, a water return pipe, a communicating vessel, a speed reducer and a supporting pipe, and the mounting base is erected at a well mouth of a geothermal well; one ends of the water inlet pipe and the water return pipe are sealed and arranged in the geothermal well, and the other ends extend out of the geothermal well and are connected with the thermophysical property testing device; a plurality of communicating vessels are arranged at the parts, in the geothermal well, of the water inlet pipe and the water return pipe at intervals and are communicated with the water inlet pipe and the water return pipe respectively; the adjacent communicating vessels are connected through supporting pipes, and the communicating vessel located on the top is connected with the mounting base through the supporting pipe. The problems that a buried heat exchanger pipe used in traditional measurement is relatively fixed in the depth of a geothermal well, measurement is difficult to conduct in different well depths, collected data is single, and segmented testing is difficult to conduct on medium-depth and even ultra-deep geothermal wells efficiently are solved.

The invention belongs to the technical field of rock-soil thermal response tests, and discloses a rock-soil thermal response test device and an intelligent data processing method.The rock-soil thermal response test device comprises a buried pipe water circulation system and a data acquisition and control system; the buried pipe water circulation system comprises a double-U-shaped buried pipe, a heating box, a water tank and a circulating water pump and is used for providing power for water circulation in the double-U-shaped buried pipe and heating circulating water according to set power. The data acquisition and control system comprises a plurality of data acquisition units, a temperature measuring line, a controller, a gateway, an antenna and a touch screen, and is used for acquiring real-time data of each monitoring point in the test process, uploading test data to the cloud platform and controlling start and stop and power adjustment of the circulating water pump and the heating box; and data processing software preset in the cloud platform can perform analysis processing, parameter calculation and result output on test data after the test, so that intelligent processing of the test data is realized, and the efficiency of obtaining the result of the rock-soil thermal response test is greatly improved.

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 present invention relates to the technical field of geothermal well thermal response testing equipment, and specifically discloses a deep hole field thermal response tester, including a thermal property testing device and a heat exchange device, the heat exchange device including a mounting seat, an inlet pipe, a return pipe, a communicating vessel, a reducer and a support pipe, the mounting seat is erected at the wellhead of the geothermal well, one end of the inlet pipe and the return pipe are sealed and placed in the geothermal well, the other ends of the inlet pipe and the return pipe extend out of the geothermal well and are connected to the thermal property testing device; a plurality of communicating vessels are arranged at intervals between the inlet pipe and the return pipe in the geothermal well, and the communicating vessels are respectively connected to the inlet pipe and the return pipe; adjacent communicating vessels are connected to each other by a support pipe, and the communicating vessel at the top is connected to the mounting seat by a support pipe; the problem that the buried heat exchanger tube used in traditional measurement is relatively fixed at the depth of the geothermal well, making it difficult to measure at different well depths, the collected data is single, and it is difficult to efficiently perform segmented testing on medium-deep or even ultra-deep geothermal wells is solved.

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.

The invention discloses a cold and hot bidirectional rock-soil thermal response test system and a control method thereof. The system comprises a water storage part, an inner circulation part, an outer circulation part, a rock-soil collection part, a control part and an analysis part, the inner circulation part and the outer circulation part are respectively connected with the water storage part, and a thermoelectric refrigeration module for heating or refrigerating a water body is arranged in the inner circulation part; a detection part and a valve part are arranged in the inner circulation part and the outer circulation part; the detection part and the valve part are connected with the control part; the rock-soil collecting part is arranged along buried pipes with different depths in the buried heat exchanger; the analysis part is used for collecting and processing data of the acquisition part, the water body temperature and the operation time; the scheme supports a cold and hot bidirectional thermal response test, and the test result is closer to the annual actual operation condition of the ground source heat pump.

The invention discloses a thermophysical parameter layering test method and apparatus, the apparatus comprises a protection box, the protection box is internally provided with a test cabinet, the test cabinet is internally provided with a heating cavity, a refrigeration cavity, a heat adjusting pipe and an electrical element, the heating cavity and the refrigeration cavity are connected through the heat adjusting pipe, and the electrical element is connected with and controls the heat adjusting pipe; three modes of frequency domain analysis, constant temperature control and constant power control are combined by regulating and controlling the heat regulating tube. According to the invention, flexible access and arrangement in a narrow or construction environment can be realized, multi-dimensional thermal response testing of the energy underground structure can be realized, and effective distinguishing of heat exchange performance of different heat exchange depths can be realized.

This invention discloses a regularization method and system for multi-parameter collaborative inversion of buried pipe heat exchangers, used for estimating design parameters of buried pipe heat exchangers based on in-situ thermal response tests. By combining a short-time temperature response function and a Tikhonov regularization inversion algorithm, reliable and stable results can be obtained while shortening the in-situ thermal response test time. On the one hand, the short-time heat transfer model allows early, highly sensitive data to be used for parameter inversion; on the other hand, regularization can suppress the influence of data noise, thereby obtaining a smooth and stable inversion solution.