Soil thermal conductivity factor detection device and its method

A thermal conductivity and measuring device technology, which is applied to soil thermal conductivity measuring devices and its fields, can solve the problems of lack of measuring devices and testing methods, and achieve the effects of compact structure, accurate test data, and good application prospects

Inactive Publication Date: 2008-01-16
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there is still a lack of ready-made measuring devices and testing methods in China.

Method used

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  • Soil thermal conductivity factor detection device and its method
  • Soil thermal conductivity factor detection device and its method
  • Soil thermal conductivity factor detection device and its method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] As shown in Figure 1, first connect the A-end and B-end of the measurement device to the buried heat exchange pipes on site, the heat preservation water tank 2 is filled with circulating fluid and the buried pipes, and the gas in the pipes is removed, and then the two circulating pumps are turned on in turn 3 and the heat pump unit 1, the heat pump unit 1 continuously provides the cold source or heat source to the heat preservation water tank through the circulation pump 3, and the fluid in the heat preservation water tank is transported to the buried heat exchange tube through another circulation pump 3, and the buried heat exchange tube After heat exchange between the fluid and the soil, it returns to the heat preservation water tank. The fluid of the two loops is mixed in the heat preservation water tank. The fluid flow of the two loops can be independently controlled by the frequency conversion pump or the bypass pipeline, and can be controlled by the flow sensor. 4 ...

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Abstract

The invention relates to a soil thermal conductivity measuring device and the method thereof, which comprises a small heat pump unit (1), a warm keeping water tank (2), two circulating pumps (3), two flow quantity sensors (4), four temperature sensors (5) and a data gathering system (6). The invention has the advantages that the structure is compact, the scene measuring is stable, the test data is accurate, and the soil thermal conductivity under the two modes of heat discharging and heat charging can be measured. The invention is conducive to the development and research of the ground source heat pump air-conditioning system, and the reasonable design of the underground pipe installation system in different areas and different geological conditions nationwide. The promotion and application of the ground source heat pump air-conditioning system is promoted, and the application prospect of the soil thermal conductivity measuring device is very good.

Description

technical field [0001] The invention relates to a device for directly measuring soil thermal conductivity on site, and further includes a testing method based on the device. Background technique [0002] One of the key technologies in the application of ground source heat pump air conditioning systems is how to design the buried heat exchanger according to the cooling and heating loads of the building. To accurately design the buried heat exchanger, it is necessary to know the actual heat conduction of the local underground soil of the building. coefficient. If the soil thermal conductivity is inaccurate, the designed system may not meet the load requirements, or the scale may be too large, increasing the initial investment. [0003] There are two traditional methods to determine the thermal conductivity of underground soil: one method is to determine the geological composition around the buried pipe based on the soil samples taken during drilling, and then check the therma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/20G01N25/18
Inventor 周亚素
Owner DONGHUA UNIV
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