Geotechnical thermal response test system

Abstract

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.

Description

technical field [0001] The invention relates to ground source heat pump technology, in particular to a technology of a rock-soil cold-heat response test system. Background technique [0002] The ground source heat pump system uses the shallow geothermal resources on the earth's surface as the cold and heat source. By inputting a small amount of high-grade energy, the energy can be transferred from the low-temperature heat source to the high-temperature heat source. It has a series of advantages such as stable operation, energy saving and environmental protection, and low maintenance costs. , has been more and more applied in today's society where energy is increasingly tight. The core basis for the design of ground source heat pump systems is the heat transfer capacity of rock and soil. A large number of engineering practices have proved that the heat transfer capacity of rock and soil in different regions will be very different. Therefore, it is very important to test the t...

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Problems solved by technology

[0004] 1) The traditional geotechnical thermal property test system of ground source heat pump generally uses electric heating device or heat pump unit as the heating and cooling module of the system. The former can only perform thermal response test, although the latter can perform cold and thermal response test, It has problems such as large volume and complex system;

[0005] 2) The traditional ground source heat pump rock and soil thermal physical property testing system is generally aimed at a single test well. After starting the test, it is necessary to run the system without turning on the heating and cooling modules to measure the initial temperature of the rock and soil, and then turn on the heating, The refrigeration module is tested. When the system is stable, the average heat transfer per meter of the test well is calculated by the collected flow rate and inlet and outlet water temperature values. The relative test time is relatively long, and the heat transfer capacity of different rock and soil layers cannot be calculated. and the influence between adjacent test wells are analyzed

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