Ground source heat pump buried pipe heat exchanger free of backfilling

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...

Examples

specific Embodiment approach 1

[0022] Specific implementation mode 1: The buried pipe heat exchanger of ground source heat pump without backfilling is composed of multiple heat exchange holes of buried pipes, as shown in Fig. Heat pipes 1 and 2, and fill the heat exchange pipes 1 and 2 with water, carry out pressurization and leak detection, and use PE at the appropriate position 4 of the heat exchange pipes 1 and 2 (at the perennial static water level of the groundwater 5). The waste material of the pipe is folded and wound into a netted rock-soil retaining device 4 and fixed on the heat exchange pipe. After the drilling and cleaning process is completed, the buried pipe heat exchange tubes 1 and 2 that have passed the pressure leak test in advance are placed in the borehole, and the pressure leak test is passed again. Then the sand backfill material 3 is poured into the test hole, and due to the effect of the rock-soil retaining device 4, the backfill material 3 will not sink below the rock-soil retaining...

specific Embodiment approach 2

[0023] Specific implementation mode 2: The 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 buried pipe of the ground source heat pump is welded in advance Heat pipes 1 and 2, and fill the heat exchange pipes 1 and 2 with water, carry out pressurization and leak detection, and 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). - The short waste of 2 PE pipes is fixed on the heat exchange pipes as rock retaining device 4. After the drilling and cleaning process is completed, the buried pipe heat exchange tubes 1 and 2 that have passed the pressure leak test in advance are placed in the borehole, and the pressure leak test is passed again. Then the sand backfill material 3 is poured into the test hole, and due to the effect of the rock-soil retaining device 4, ...

specific Embodiment approach 3

[0024]Specific implementation mode 3: As an imprecise construction method, the ground source heat pump buried pipe heat exchanger without backfilling is composed of multiple buried pipe heat exchange holes, and there is no rock-soil retaining device 4 on the heat exchange pipe. After the drilling and cleaning process is completed, the buried pipe heat exchange tubes 1 and 2 that have passed the pressure leak test in advance are placed in the borehole, and the pressure leak test is passed again. Throw mud balls or soil clods into the heat exchange holes to block the heat exchange pipes and hole walls, and then pour the sand backfill material 3 into the test hole. Due to the blocking effect of the mud balls or soil clods, the backfill material 3 will not sink Below the rock and earth retaining device. In the heat exchange hole, the part above the mud mass or soil block has the water inlet pipe 1 of the buried pipe heat exchange pipe, the water outlet pipe 2 of the buried pipe he...

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...

Examples

specific Embodiment approach 1

[0022] Specific implementation mode 1: The buried pipe heat exchanger of ground source heat pump without backfilling is composed of multiple heat exchange holes of buried pipes, as shown in Fig. Heat pipes 1 and 2, and fill the heat exchange pipes 1 and 2 with water, carry out pressurization and leak detection, and use PE at the appropriate position 4 of the heat exchange pipes 1 and 2 (at the perennial static water level of the groundwater 5). The waste material of the pipe is folded and wound into a netted rock-soil retaining device 4 and fixed on the heat exchange pipe. After the drilling and cleaning process is completed, the buried pipe heat exchange tubes 1 and 2 that have passed the pressure leak test in advance are placed in the borehole, and the pressure leak test is passed again. Then the sand backfill material 3 is poured into the test hole, and due to the effect of the rock-soil retaining device 4, the backfill material 3 will not sink below the rock-soil retaining...

specific Embodiment approach 2

[0023] Specific implementation mode 2: The 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 buried pipe of the ground source heat pump is welded in advance Heat pipes 1 and 2, and fill the heat exchange pipes 1 and 2 with water, carry out pressurization and leak detection, and 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). - The short waste of 2 PE pipes is fixed on the heat exchange pipes as rock retaining device 4. After the drilling and cleaning process is completed, the buried pipe heat exchange tubes 1 and 2 that have passed the pressure leak test in advance are placed in the borehole, and the pressure leak test is passed again. Then the sand backfill material 3 is poured into the test hole, and due to the effect of the rock-soil retaining device 4, ...

specific Embodiment approach 3

[0024]Specific implementation mode 3: As an imprecise construction method, the ground source heat pump buried pipe heat exchanger without backfilling is composed of multiple buried pipe heat exchange holes, and there is no rock-soil retaining device 4 on the heat exchange pipe. After the drilling and cleaning process is completed, the buried pipe heat exchange tubes 1 and 2 that have passed the pressure leak test in advance are placed in the borehole, and the pressure leak test is passed again. Throw mud balls or soil clods into the heat exchange holes to block the heat exchange pipes and hole walls, and then pour the sand backfill material 3 into the test hole. Due to the blocking effect of the mud balls or soil clods, the backfill material 3 will not sink Below the rock and earth retaining device. In the heat exchange hole, the part above the mud mass or soil block has the water inlet pipe 1 of the buried pipe heat exchange pipe, the water outlet pipe 2 of the buried pipe he...

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