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Vertical spiral-type buried pipe construction method for GRHP (ground source heat pump)

A construction method and technology of ground source heat pumps, applied in infrastructure engineering, pipeline laying and maintenance, pipes/pipe joints/fittings, etc. The shallow depth of pipe burial and other problems can be solved, so as to achieve the effects of small footprint, reduced construction cost and saving land resources

Active Publication Date: 2013-02-20
CHINA RAILWAY NO 2 ENG GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ground water source heat pump technology has obvious benefits of energy saving and protection of the atmospheric environment, but there are also defects: the local area must have abundant groundwater, and if the water level is low, the power consumption of the water pump will greatly reduce the efficiency of the system
The construction of horizontal buried pipe is simple, but it occupies a large area, and the depth of buried pipe is shallow, and the heat exchange efficiency of geothermal energy is not high; vertical single and double U-shaped buried pipes, U-shaped heat exchange pipes are usually buried in round holes with a diameter of 150mm , the distance between the water supply and return pipes is relatively close, and there is a large heat exchange between the water supply and return pipes, resulting in low geothermal heat transfer efficiency
In addition, the vertical single and double U-shaped buried pipes need to drill a large number of holes to bury the U-shaped heat exchange tubes, and the drilling depth is relatively large, resulting in high construction costs

Method used

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  • Vertical spiral-type buried pipe construction method for GRHP (ground source heat pump)
  • Vertical spiral-type buried pipe construction method for GRHP (ground source heat pump)
  • Vertical spiral-type buried pipe construction method for GRHP (ground source heat pump)

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Effect test

Embodiment 1

[0032] The construction method of the vertical spiral buried pipe of the ground source heat pump provided in this embodiment includes the following steps:

[0033] (1) Repairing structural piles: Check whether the structural piles of the building itself meet the requirements: the allowable deviation of the diameter of the structural piles is +10mm, and the allowable deviation of the verticality of the structural piles is less than 3‰ of the length of the hole piles. Repair the hole piles that do not meet the requirements. Meet the requirements. Specifically, in this project, the depth or diameter of 45 structural piles did not meet the requirements for buried pipes, so they were discarded; the other 125 structural piles can be used as heat exchange piles, so the 125 structural piles are also used as heat exchange piles. Used to bury PE coils. Of the 125 structural piles and heat exchange piles, the verticality of 13 structural piles and heat exchange piles did not meet the re...

Embodiment 2

[0044] The construction method of the vertical spiral buried pipe of the ground source heat pump provided in this embodiment includes the following steps:

[0045] (1) Excavate heat exchange piles: Excavate heat exchange piles according to design specifications, and the diameter of heat exchange piles is 2 meters. The heat exchange pile excavation technology is very mature and will not be repeated here.

[0046] (2) Make steel bar support: bury Φ12 steel bars 2 around the retaining wall of the hole pile as the steel bar support. The spacing of the clamps 4 is not greater than 2000mm. In the process of embedding Φ12 steel bar 2, if the heat exchange pile is deep and a Φ12 steel bar 2 cannot extend from the bottom of the pile to the pile mouth, it should be connected by lap joint, and the lap length should not be less than 15 times the diameter of Φ12 steel bar 2 times, in the same section, the overlapping area of ​​Φ12 steel bars should not exceed 50%, refer to image 3 .

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Abstract

The invention discloses a vertical spiral-type buried pipe construction method for a GRHP (ground source heat pump). The method comprises the following steps of: (1) excavating a hole pile with the diameter being at least 1000mm, and vertically burying a plurality of reinforced steel bars in the protective wall of the hole pile so as to be used as a reinforced steel bar support; (2) spirally coiling at least one group of PE (poly ethylene) coil pipes on the reinforced steel bar support, and binding and fixing, wherein one ends of the PE coil pipes are provided with water inlet pipes, and the other ends of the PE coil pipes are provided with water return pipes, and the distances between the water inlet pipe and the water outlet pipe which are adjacent are greater than 500mm; and (3) pouring concrete in the hole pile. Compared with a horizontal buried pipe and a vertical single-dual U-shaped buried pipe, the vertical spiral-type buried pipe construction method provided by the invention is relatively high in ground heat energy heat exchange efficiency, saves land resources, and lowers the cost.

Description

technical field [0001] The invention relates to a ground source heat pump buried pipe construction method, in particular to a ground source heat pump vertical spiral buried pipe construction method. Background technique [0002] Ground source heat pump technology mainly uses the heat stored in the shallow crust to heat and cool buildings. It has good energy saving and environmental benefits, and has been increasingly widely used in recent years. Ground source heat pump methods are mainly divided into groundwater source heat pump technology and buried pipe heat pump technology. The groundwater source heat pump technology mainly uses the heat released by pumping groundwater in the heat pump, and then recharges it to the groundwater layer. The groundwater source heat pump technology has obvious benefits of energy saving and protection of the atmospheric environment, but there are also defects: the local area must have abundant groundwater, and if the water level is low, the po...

Claims

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Application Information

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IPC IPC(8): F16L1/028E02D5/34
Inventor 张以韬郑宗跃李伟杨昆李高庆王鑫刘军平熊耀华孙凌陈荣任良杰何复生何寿海
Owner CHINA RAILWAY NO 2 ENG GRP CO LTD
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