45 results about "Thermal response test" patented technology

The invention relates to an in-situ thermal response testing method of stratified thermal properties of underground rock and soil. The invention relates to an in-situ thermal response testing device of the stratified thermal properties of the underground rock and soil. According to the in-situ thermal response testing device disclosed by the invention, a U-shaped pipe is buried, an optical fiber temperature sensor is inserted into two branch pipes of the U-shaped pipe, the U-shaped pipe is connected with an inlet and outlet of a circulating water pipeline of a ground testing device, water temperatures in the two branch pipes, namely the water inlet branch pipe and the water outlet branch pipe of the U-shaped pipe in different depth layers are respectively measured, the power of a heater is kept constant, and measured data of the water temperatures and the flow rates of circulating water in the two branch pipes of the U-shaped pipe in different depth layers at different times, as well as the corresponding heating power of the heater is recorded, so that a heat conduction coefficient, volume specific heat and a drilling thermal resistance value of soil in each layer can be obtained. According to the in-situ thermal response testing device disclosed by the invention, the defects that the distribution of the thermal properties of the rock and soil in different depths can not be obtained, the testing precision can not be improved, an optimal design method of the underground buried pipe can not be improved and the like in the prior art can be solved; furthermore, values of the thermal properties of the underground rock and soil, the types of the rock and soil, the contents of underground water and the seepage situations in the different depths can be obtained, and the in-situ thermal response testing device further has the advantages of high sensitivity, strong anti-interference property, corrosion resistance, small installation size, no requirements on a power supply and low testing cost.

The invention relates to a system for testing the comprehensive heat conductivity coefficient and specific heat capacity of a rock-soil body. The system comprises a heating device and a measuring device, wherein the heating device comprises a heat preservation water tank, an electrical heating rod, a water pump, a heat preservation water inlet pipe, a heat preservation water return pipe, a heat exchanger tube and a balance valve, and the measuring device comprises a rock-soil body temperature sensor, a fluid temperature sensor and a flowmeter. The electrical heating rod is arranged in the heat preservation water tank, the water pump is arranged on the water inlet pipe, the flowmeter and the balance valve are arranged on the water return pipe, and the two ends of the heat exchanger tube are respectively connected with the water inlet pipe and the water return pipe. The invention simultaneously discloses a testing method of the system for testing. With the system, the disturbance and damage which are caused by a laboratory test method to the original structure of the rock-soil body are overcome; the defect that a heat probe method is not long enough is overcome; and the defect that the convention vertical buried pipe rock-soil thermal response test cannot test the thermal-physical characteristic parameters of all the layers of the rock-soil bodies is made up. The system is simple and easy to operate during field tests, and is low in cost. The thermal-physical characteristic parameters which are obtained through utilizing the theory to invert are accurate and reliable.

The invention discloses a PLC-based ground source heat pump thermal response testing system, which realizes intuitive operation and real-time monitoring of the ground source heat pump response testing system through a PLC programmable controller and a WinCC man-machine interface in the system. The technical problem solved by the present invention is to carry out real-time remote monitoring of the testing and experimental process of the ground source heat pump. The PLC-based ground source heat pump thermal response testing system disclosed in the present invention can not only be applied to the actual measurement of engineering, but also can be used to measure the thermal properties of soil. The parameters are researched, and the tester introduces PLC programmable controller and WinCC module to realize the remote monitoring of the measurement and experiment status. The tester has compact structure, wide range of test depth, high degree of visualization, convenient operation, safe use and high test accuracy.

The invention provides an in-situ thermal response testing method for layered rock and soil thermophysical properties. According to the in-situ thermal response testing method for the layered rock and soil thermophysical properties, a thermal response test is performed on an assembled buried tube heat exchanger, the theoretical value of the average temperature of a group of circulating fluids is calculated through introduction of buried tube parameters and related test data in a formula, the actual value of the average temperature of the group of circulating fluids is measured through equipment, and the theoretical value and the actual value are calculated with a parameter estimation method, so that layered rock and soil thermal thermophysical property parameters can be determined. The in-situ thermal response testing method for the layered rock and soil thermophysical properties puts forwards a column heat source model and is applicable to tests of the layered thermophysical property parameters. The change of thermal resistance in drilled holes in the depth direction and the change of the heat exchange power in the drilled holes in the depth direction are considered, and the rock and soil thermophysical property parameters at a certain layer can be calculated accurately.

The invention relates to an indoor model test apparatus for ground source heat pump rock soil thermal response testing and an application thereof; the indoor model test apparatus comprises a model case, a soil model for test, a measurement module, a data acquisition module, a thermal cycle module, and a host PC computer; the soil model for test is disposed in the model case; the measurement module is disposed in the soil model for test; the thermal cycle module is connected with the soil model for test; the data acquisition module is connected with the measurement module; the data acquisition module is connected with the host PC computer. Compared with the prior art, the invention has the advantage that the indoor model test apparatus can not only calculate thermophysical parameters of heat exchange soil required by ground source heat pump buried pipe design, but also study environment effect of surrounding soil caused by long-term operation of the ground source heat pump system.

The invention discloses a thermal response remote test device of a low-grade heat source of an earth source heat pump, comprising an earth source heat pump rock-soil thermal response spot test device and a remote data wireless transmission system, wherein the earth source heat pump rock-soil thermal response spot test device comprises an air cooled heat pump unit, an electric heater, a voltage regulating module, a voltage stabilizer, a magnetic valve, a frequency converter, a water pump, a pressure transmitter, a flow transmitter, a temperature sensor and a movable pipeline joint; the remote data wireless transmission system adopts a GPRS (General Packet Radio Service) remote data wireless transmission system and comprises a field data acquisition module, a GPRSDTU (General Packet Radio Service Data Transmission Unit) communication module, a China mobile network platform and a central server client. Compared with the prior art, the invention adopts the combined mode of the spot test device and a GPRS remote data wireless transmission technology and effectively makes up the defect of short measuring distance of field-use wired serial communication. The tested monitoring is not limited by space and time.

The invention relates to a ground source heat pump vertical buried pipe heat transfer value model and an establishment method thereof. The model is a three-dimensional value heat transfer model and has two structure hierarchies including the horizontal structure and the vertical structure. According to the model, value simulation of field thermal response tests on constant heat flow conditions and constant temperature conditions can be carried out, rock-soil mass thermal physical parameters and vertical buried pipe heat exchange capability are calculated, and the model is convenient for design and application; on the condition that relatively high calculation precision is guaranteed, occupied calculation hardware resources are relatively small, the operation speed can be accelerated, and the model is suitable for long-term heat transfer calculation. The model is advantaged in that a heat exchange fluid can be inputted in a mode of a variable flow velocity parameter during simulating long-term load loading to acquire corresponding heat exchange capabilities corresponding to different flow velocities, and the model is suitable for optimization value study on frequency modulation water pump parameters in engineering design.

The invention relates to a thermal response testing instrument for quickly responding the heat transfer performance of buried heat exchangers, which comprises a host computer (10); the host computer (10) is connected with a controller element (20); the controller element (20) is respectively connected with a pressure difference transducer (30), a temperature transducer (40) and a flow transducer (50) through interfaces; the pressure difference transducer (30), the temperature transducer (40) and the flow transducer (50) are connected to a pipeline of a system; and one end of a water circulating pump (60) is connected with a variable power thermal accumulation barrel (70) or a variable power ice accumulation barrel (80), and the other end of the water circulating pump (60) is connected with a buried heat exchanger to be detected. The thermal response testing instrument achieves the summer or winter operational effect of a practical ground source heat pump system.

The invention provides a geotechnical thermal response testing method, which belongs to the technical field of ground source heat pumps and solves the problem of large errors of theoretical calculation results in the conventional geotechnical thermal response testing method. The method comprises the following steps of: testing an actual measurement temperature value of an underground pipe by using a temperature sensor; inputting changed heating power by controlling a heater through an acquisition control system; measuring an actual flow value by using a flow sensor; substituting the actual flow value and the heating power into a discretization equation of a linear heat source or column heat source model; changing a geotechnical thermal conductivity coefficient, a geotechnical heat capacity value and a well hole thermal resistance value, substituting into the discretization equation, and solving a pilot calculation temperature value of the underground pipe; and comparing the solved pilot calculation temperature value with the actual measurement temperature value, wherein the substituted geotechnical thermal conductivity coefficient, geotechnical thermal capacity value and well holethermal resistance value are the solved parameter values when the pilot calculation temperature value and the actual measurement temperature value have the minimum mean square deviation or the maximum correlation coefficient after repeated pilot calculation. By the method, data is acquired by testing under variable working conditions, so that the accuracy is improved.

The invention belongs to the field of ground source heat physics, and relates to rock and earth mass thermal response testing equipment. The rock and earth mass thermal response testing equipment comprises a data collection and storage device; two circulation pipelines used for conveying a circulating medium; a thermoelectric cooling unit which is connected with heat exchangers arranged on the two circulation pipelines, and is used for conveying heat energy and cold energy for the two circulation pipelines at the same time; and a DC stabilized power supply which is connected with the thermoelectric cooling unit, and is used for power supply for the thermoelectric cooling unit. The rock and earth mass thermal response testing equipment is provided with the thermoelectric cooling unit, output of heat energy and output of cold energy can be realized at the same time, the two circulation pipelines are connected with two heat exchanging wells respectively, and thermal response tests of heat absorption conditions and heat release conditions of the two heat exchanging wells can be carried out respectively.

The invention discloses a thermal response testing method and device of dual-condition rock and soil mass, belonging to a new method and device for thermal response test of rock and soil in a ground source heat pump. Cold water and hot water prepared at the condensing side and evaporating side of a water cooling chiller or a ground source heat pump unit are used for respectively connecting to test holes for releasing heat and absorbing heat in test, so that the rock and soil mass thermal response conditions under two conditions are simulated and the heat characteristic parameters of the rock and soil mass are obtained synchronously. The method and device disclosed by the invention have the beneficial effects that the tests for two conditions are completed conveniently; time and labours are saved; and the obtained parameters under the two conditions have actual guiding significances in designing ground source pump system.

The present invention relates to a vehicle high-temperature temperature sensor thermal response test method (100). The method comprises the following steps of: setting a constant temperature source toa preset temperature Tt (101); putting a temperature sensor to be measured into an environment at a room temperature Ts for special time (102); connecting the temperature sensor to be measured with ameasurement device, and recording a current room temperature Ts=T0 (103); calculating a step change temperature Tn and a timing temperature Tx (104); putting the sensor to be measured into the constant temperature source, and setting initial time t0 (105); recording each timing time tx (106) when the sensor to be measured reaches the timing temperature; and calculating an interval tx-t0 (107) ofthe timing time tx and the initial time t0.

The invention relates to a movable ground source heat pump thermal response test instrument and a testing method. The movable ground source heat pump thermal response test instrument comprises a vertical U-shaped pipe buried in a ground source to be detected, a water box, an electric heater, a circulating water pump, a flowmeter, two temperature sensors, a power adjusting instrument, a PID (Proportion Integration Differentiation) controller, a data acquisition instrument and a frequency converter, wherein the vertical U-shaped pipe is connected with a water inlet and a water outlet of the water box, the electric heater is placed on the bottom of the water box, the two temperature sensors are respectively arranged in a water inlet pipe port and a water outlet pipe port of the vertical U-shaped pipe, the flowmeter is arranged in the water inlet pipe port of the water box, and signals of the flowmeter and the two temperature sensors are sent to the data acquisition instrument, signals of the temperature sensors in the water inlet pipe port of the vertical U-shaped pipe are sent to the PID controller, an output signal of the PID controller is sent to the power adjusting instrument for controlling the electric heater, and the frequency converter controls the circulating water pump. The test instrument can finish a soil thermal response test of a ground source heat pump under two working conditions with constant heat flux or steady temperature, the real-time data acquisition and analysis are realized in the test, and the accurate soil thermal response data is obtained.

The invention provides a thermal response testing method for rock-soil thermal conductivity distribution. The method is used for testing the thermal conductivity of rock soil in different underground depth layers. The method comprises the following steps: firstly, establishing a multi-dimensional transient heat transfer model of a buried pipe heat exchanger by considering heat transfer in the depth direction of rock soil, simulating a longitudinal temperature distribution curve of fluid in the heat exchanger, then testing temperature distribution data of the fluid at different depths in the heat exchanger through experiments, and finally using a multi-objective optimization algorithm and directly adopting fluid temperature distribution data to predict rock soil thermal conductivity distribution data in multiple spatial layers at the same time. The rock soil thermal conductivity distribution tested by the method has high precision, the problem of poor convergence during layered testing of a traditional method can also be solved, meanwhile, the testing precision is not affected by depth, and the method is wide in applicability and high in testing efficiency.

The invention discloses a portable geothermal energy thermal response testing device, which comprises a water tank, a water outlet pipe and a water return pipe connected with an underground pipe to form a closed circulation system, an electric heater, a water pump and a control system; The water outlet connected by the pipe, the beginning of the return pipe is provided with the return port connected with the buried pipe; the electric heater is arranged on the outlet pipe; the water pump is arranged on the inlet side of the electric heater to provide circulation power; the inlet of the water tank and the water pump Side pipe connection; the electric heater and water pump are connected to the pipe in a detachable connection. The thermal response testing equipment of the present invention has the advantages of small size, easy to carry, convenient disassembly and assembly, easy assembly and maintenance; the circulation system and the control system are integrated into one body, and the operation is convenient and simple; and it has a self-cleaning function, which can prolong the service life of the equipment .

A system and method for performing at least one thermal response test for a medium. At least one request signal indicative of at least one request to perform the thermal response test is received. On the basis of the at least one request, at least one control signal is generated for causing at least one parameter of a fluid circulating through the medium to be acquired. The at least one measurement is indicative of a thermal property of the medium. The at least one control signal is then output to a hydraulic system.

The present invention discloses a ground source heat pump thermal response test data processing analysis method with a power-off process. The method comprises that a circulating water pump and a heater stop working during power-off; after electricity is recovered, the circulating water pump and the heater are restarted, and the test is continuously performed; during the testing process, the influent temperature and the effluent temperature of the U-shaped vertical buried pipe, the water circulating flow rate in the pipe and the heating power are continuously recorded; and the obtained test data are processed to obtain the rock-soil thermal conductivity ks and the rock-soil volume specific heat capacity [rho]scs. According to the present invention, the problems that the soil temperature recovery time is long after the power-off and the rock-soil volume specific heat capacity [rho]scs can not be obtained in the prior art can be solved.

A system and method for performing at least one thermal response test for a medium. At least one request signal indicative of at least one request to perform the thermal response test is received. On the basis of the at least one request, at least one control signal is generated for causing at least one parameter of a fluid circulating through the medium to be acquired. The at least one measurement is indicative of a thermal property of the medium. The at least one control signal is then output to a hydraulic system.

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.

The invention provides a power device quality grade classification method. The method comprises the steps of: providing power devices; performing a thermal response test and an electrical parameter test on the power device, and performing calculation to obtain a variable quantity; determining a standard value domain and an allowable change range, and judging whether a thermal response test resultand an electrical parameter test result meet the standard value domain or not; judging whether the variation exceeds an allowable variation range or not; establishing a quality grade classification standard, wherein the quality grade classification standard comprises a quality grade, the quality grade comprises a test index of a thermal response test, a test index of an electrical parameter test and a judgment index corresponding to a variable quantity, each test index and each judgment index correspond to a reference range, and each reference range corresponds to a score; based on the thermalresponse test result, the electrical parameter test result and the reference range to which the variable quantity belongs, endowing corresponding scores to the thermal response test result and the electrical parameter test result; summing the thermal response test result, the electrical parameter test result and the score corresponding to the variable quantity to obtain a total score; and performing grade classification based on the score and the total score.

The invention discloses a ground source heat pump geotechnical thermal response test data processing method with a power failure process. The method includes: during power failure, recording the power failure moment and inflow and outflow water temperature; when the power supply is restored, continuing the test; monitoring the water temperature restoration moment in real time, letting the test keep operating to satisfy the test required total time, i.e. the time from the water temperature restoration moment to the final test stop moment plus the test time before power failure; eliminating the test record data between the power failure moment and the water temperature restoration moment, combining the test record data after the water temperature restoration moment with the test record data before the power failure moment so as to obtain the test data serving as the effective test data; and calculating geotechnical thermophysical parameters. The method provided by the invention solves the problems that the ground temperature restoration after power failure needs a long time, data processing abandons the data before power failure, the test time is long after power failure restart, the geotechnical volume specific heat capacity cannot be obtained in the prior art.

The invention discloses a thermocouple thermal response tester, which comprises a thermocouple test host and a handheld heater, wherein the thermocouple test host comprises a signal introduction connection unit, a temperature measurement and control unit, a data acquisition unit, a data processing unit, a data storage unit, a host data transmission unit, and a man-machine interaction unit; and the handheld heater comprises a heating unit, a heating control unit, a data display unit, and a heater data transmission unit. 48-channel thermocouple temperature data can be measured at the same time, the thermocouple can be heated, the measured data are stored, and when the tester is used for thermocouple thermal response test, the existing operation can be simplified, and the working efficiency and the accuracy in the case of thermocouple thermal response test operation can be improved.

The invention discloses a controllable multi-factor ground source heat pump test platform and a method thereof. The test platform comprises a thermal response tester, a control platform, a horizontalheat preservation tank, a heating device, a refrigerating device, an acoustic emission sensor and a temperature sensor. The test method comprises the following steps: dividing the horizontal heat preservation tank in which a coaxial double-pipe heat exchanger is buried into a plurality of sections, and arranging the heating device and the refrigerating device in the related sections to simulate the environmental temperatures of different stratums in engineering actual conditions. The test platform is easy to build, can control a soil temperature field, and simulates the influence of various factors on the heat exchange efficiency of the buried pipe heat exchanger; the test can be carried out indoors, and the operability is high.

The invention discloses a method for estimating rock-soil thermophysical parameters of a sleeve type buried pipe, and belongs to the technical field of ground source heat pumps. Different objective functions are adopted to estimate the thermal conductivity ks and the volume specific heat capacity Cs of rock-soil based on a sleeve type buried pipe heat transfer model and the inlet and outlet fluid temperature of a thermal response test. The method comprises the following steps: firstly, taking root-mean-square errors of inlet and outlet fluid temperatures at all test moments as a target function, estimating ks and Cs at the same time, and taking the ks and Cs as a result of the zeroth iteration; secondly, estimating Cs by taking the root-mean-square error of the inlet and outlet fluid temperature at the early test moment as an objective function; then, estimating ks by taking root-mean-square errors of inlet and outlet fluid temperatures at all test moments as a target function; and finally, circulating the two steps in an iterative mode until the difference values of ks and Cs estimated in two adjacent iterative processes are smaller than a set value, and outputting ks and Cs estimated in the last iterative process. The method has the advantages of high precision and short required thermal response test time.

The invention discloses a rock soil cold and hot response testing system, and relates to the technical field of ground source heat pumps, aiming to solve the technical problems of testing time shortening and the rock soil heat exchange capability calculation. The system comprises a data collecting device, a constant-temperature water bath device, a circulation water tank, a first circulation water pump, a second circulation water pump and two testing wells, wherein a buried pipe is embedded in each of the two testing wells respectively, wherein one buried pipe is a first buried pipe, and the other buried pipe is a second buried pipe; a water outlet of the constant-temperature water bath device is connected with a water inlet of the constant-temperature water bath device by the first buried pipe and the first circulation water pump; pipe openings in two ends of the first buried pipe are respectively provided with a pipe opening temperature sensor; each vertical pipe section of two buried pipes is respectively provided with a plurality of pipe internal temperature sensors; the water outlet of the circulation water tank is connected to a water inlet of the circulation water tank by the second buried pipe and the second circulation water pump. The system disclosed by the invention is suitable for rock soil cold and hot response testing.

The invention discloses a thermal response test method of a spacecraft assembly thermistor based on augmented reality. A thermal response test is carried out through test equipment. The method comprises steps of receiving the first feature information, and the first feature information comprising a three-dimensional model of a spacecraft, preset positions of thermistors on the spacecraft and telemetering codes, corresponding to the preset positions, of the thermistors; receiving the second feature information, wherein the second feature information is used for mapping a specific position on astructural deck of the spacecraft; generating a first indication according to the first feature information and the second feature information, wherein the first indication comprises the position of each thermistor and the path to each thermistor; displaying the first indication; and performing a thermal response test of the thermistor according to the first indication. According to the method, the position of the thermistor can be quickly positioned based on augmented reality, multi-person operation is not needed, manpower is liberated, and thermal response test efficiency of the thermistor is improved.

The invention discloses a thermal response remote test device of a low-grade heat source of an earth source heat pump, comprising an earth source heat pump rock-soil thermal response spot test device and a remote data wireless transmission system, wherein the earth source heat pump rock-soil thermal response spot test device comprises an air cooled heat pump unit, an electric heater, a voltage regulating module, a voltage stabilizer, a magnetic valve, a frequency converter, a water pump, a pressure transmitter, a flow transmitter, a temperature sensor and a movable pipeline joint; the remote data wireless transmission system adopts a GPRS (General Packet Radio Service) remote data wireless transmission system and comprises a field data acquisition module, a GPRSDTU (General Packet Radio Service Data Transmission Unit) communication module, a China mobile network platform and a central server client. Compared with the prior art, the invention adopts the combined mode of the spot test device and a GPRS remote data wireless transmission technology and effectively makes up the defect of short measuring distance of field-use wired serial communication. The tested monitoring is not limited by space and time.

The invention discloses a rock soil cold and hot response testing system, and relates to the technical field of ground source heat pumps, aiming to solve the technical problems of testing time shortening and the rock soil heat exchange capability calculation. The system comprises a data collecting device, a constant-temperature water bath device, a circulation water tank, a first circulation water pump, a second circulation water pump and two testing wells, wherein a buried pipe is embedded in each of the two testing wells respectively, wherein one buried pipe is a first buried pipe, and the other buried pipe is a second buried pipe; a water outlet of the constant-temperature water bath device is connected with a water inlet of the constant-temperature water bath device by the first buried pipe and the first circulation water pump; pipe openings in two ends of the first buried pipe are respectively provided with a pipe opening temperature sensor; each vertical pipe section of two buried pipes is respectively provided with a plurality of pipe internal temperature sensors; the water outlet of the circulation water tank is connected to a water inlet of the circulation water tank by the second buried pipe and the second circulation water pump. The system disclosed by the invention is suitable for rock soil cold and hot response testing.