Ground source heat pump buried pipe heat exchanger free of backfilling

A technology of buried pipe heat exchanger and ground source heat pump, which is applied to geothermal collectors, heat pumps, geothermal energy, etc., can solve problems such as no or little consideration of impact, save construction work time, simplify construction procedures, cost-saving effect

Active Publication Date: 2015-03-25
湖南凌天科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing means to improve the thermal performance of buried pipe heat exchangers, such as the above-mentioned patent documents, are all based on optimizing the backfill material and enhancing the compactness of the backfill material. The compactness of the pipe backfill material, even in places with abundant groundwater in the south, when the survey finds that there is underground runoff, the impact of groundwater on the heat exchanger is not considered or rarely considered, and various backfill materials are still used for ba

Method used

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  • Ground source heat pump buried pipe heat exchanger free of backfilling

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0022] Specific embodiment 1: Ground source heat pump buried pipe heat exchanger without backfilling is composed of multiple buried pipe heat exchange holes, as shown in Figure 1, when the buried pipe is constructed, the ground source heat pump buried pipe exchange is welded in advance Heat pipes 1, 2, and fill the heat exchange pipes 1 and 2 with water, and perform pressure leak detection to pass. Use PE at appropriate positions 4 of heat exchange pipes 1 and 2 (at the perennial static water level of groundwater 5) A rock-soil retaining device 4 in which the waste material of the tube is folded and wound into a mesh is fixed on the heat exchange tube. After the drilling and cleaning process is completed, the buried heat exchange tubes 1 and 2 that are pre-pressed and qualified for leak detection are placed in the borehole, and the pressure is again qualified for leak detection. Then, the sand and soil backfill material 3 is poured into the test hole. Due to the action of the r...

Example Embodiment

[0023] Specific implementation manner 2: Ground source heat pump buried pipe heat exchanger without backfilling is composed of multiple buried pipe heat exchange holes, as shown in Figure 1, when the buried pipe is constructed, the ground source heat pump buried pipe exchange is welded in advance Heat pipes 1, 2, and fill the heat exchange pipes 1, 2 with water, and perform pressure leak detection to pass. Use 1 at the appropriate position 4 of the heat exchange pipes 1 and 2 (at the perennial static water level of the groundwater 5) -2 short wastes of PE pipes are fixed on the heat exchange pipes as a rock and soil retaining device 4. After the drilling and cleaning process is completed, the buried heat exchange tubes 1 and 2 that are pre-pressed and qualified for leak detection are placed in the borehole, and the pressure is again qualified for leak detection. Then, the sand and soil backfill material 3 is poured into the test hole. Due to the action of the rock-retaining dev...

Example Embodiment

[0024] Specific implementation mode 3: As an inaccurate construction method, the ground source heat pump buried pipe heat exchanger without backfill is composed of multiple buried pipe heat exchange holes, and there is no rock and soil retaining device 4 on the heat exchange pipe. After the drilling and cleaning process is completed, the buried heat exchange tubes 1 and 2 that are pre-pressed and qualified for leak detection are placed in the borehole, and the pressure is again qualified for leak detection. Put mud mass or soil block into the heat exchange hole, jam the heat exchange pipe and hole wall, and then pour the sand backfill material 3 into the test hole. Due to the blocking effect of the mud mass or soil block, the backfill material 3 will not sink Go below the rock and soil device. In the heat exchange hole, the part above the mud mass or soil block, within the hole wall 6 of the heat exchange hole, there are the water inlet pipe 1, the water outlet pipe 2 and the b...

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Abstract

The invention provides a ground source heat pump buried pipe heat exchanger free of backfilling to overcome defects in the prior art. The part below the perennial underground water level is reserved in a buried pipe heat exchanging hole, backfilling of sandy soil backfill materials or other special grouting backfill materials is not needed, in other words, backfilling of the backfill materials does not need to be carried out between a water inlet pipeline and a water outlet pipeline of a buried pipe heat exchanging pipe under the perennial underground water level and between the heat exchanging pipe and the hole wall, the heat exchanging performance of the buried pipe heat exchanger is improved through groundwater runoff water, the number of drill holes is reduced, the construction procedure is simplified, the construction cost is reduced, a large number of backfill materials and cost for backfill grouting and compacting are saved, and the social benefits and the economical benefits are very obvious.

Description

technical field [0001] The invention relates to the field of soil source heat pump air conditioners, in particular to a buried tube heat exchanger for soil source heat pumps. Background technique [0002] The soil source heat pump air conditioning system absorbs the cold and heat in the underground soil through the buried pipe heat exchanger to realize building cooling and heating. It is more efficient and energy-saving than conventional air conditioning and heating systems. It is a promising new technology for renewable energy utilization. . [0003] The buried tube heat exchanger is a unique facility of the ground source heat pump system, and it is the most critical part related to the initial investment of the system construction and the overall operating efficiency. The construction cost of the buried tube heat exchanger generally accounts for about 20-30% of the total construction cost of the system, which makes the construction cost of the ground source heat pump high...

Claims

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Application Information

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IPC IPC(8): F25B30/06F24J3/08
CPCF24T10/10F25B30/06Y02E10/10
Inventor 李明
Owner 湖南凌天科技有限公司
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