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Prestressing force concrete pipe pile for low-temperature geothermal energy conversion

A concrete pipe pile and prestressing technology, applied in the field of multifunctional prestressed concrete pipe piles, can solve the problems of unfavorable traditional bearing performance of pile foundations, complicated construction of coil heat exchangers, extrusion damage of tubular heat exchangers, etc. The effect of avoiding groundwater resource usage fees, eliminating groundwater pollution problems, and increasing heat exchange efficiency

Inactive Publication Date: 2006-07-12
张延军 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although some people in foreign countries have mentioned the concept of pile-buried heat exchangers, they are all based on high-strength polyethylene U-shaped coil perfusion solid section piles (Laloui Lyesse, Moreni Matteo, Vulliet Laurent, Behavior of a bi-functional pile, foundation and heatexchanger, Canadian Geotechnical Journal, v 40, n 2, April, 2003, p 388-402.), the disadvantages of these based on drilling or embedding tubular heat exchangers in various solid section piles are: high drilling costs, solid section The construction of the coil heat exchanger in the pile is complicated, requiring processes such as coil binding and steel cage
Moreover, in all kinds of solid cross-section piles, there will be local material softening zones and stress concentration at the coil position, which will affect the quality of the pile body and have an adverse effect on the traditional bearing performance of the pile foundation.
In addition, various polyethylene tubular heat exchangers are at risk of being crushed

Method used

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  • Prestressing force concrete pipe pile for low-temperature geothermal energy conversion
  • Prestressing force concrete pipe pile for low-temperature geothermal energy conversion
  • Prestressing force concrete pipe pile for low-temperature geothermal energy conversion

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Embodiment Construction

[0025] exist figure 1 Among them, the ground source heat pump utilizes the low-temperature potential heat energy of the shallow geothermal resources on the surface. In winter, the heat exchange fluid in the disc heat exchanger in the prestressed concrete pipe pile (1) converts the ground energy into the shallow soil layer (2) The heat in the building is extracted, and supplied to the building (5) for heating through the surface exchange pipeline (3) and the ground source heat pump unit (4); The heat exchange fluid in the ground source heat pump unit (4) and the tubular heat exchanger (1) in the prestressed concrete pipe pile is released into the shallow soil layer (2).

[0026] exist figure 2 In the shown embodiment, the ground energy conversion prestressed concrete pipe pile (1) has a variety of pipe diameters, and the reinforcement cage is formed by binding prestressed steel bars (10) and spiral stirrups (11). Concrete (15) is between (13,14), and the lower end of the pil...

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Abstract

The invention relates to a low-temperature terrestrial heat exchange pre-stress concrete post, which arranges pipe heat exchange devices in variable shape in the posts to carry, baffle soil and strengthen the base, while it can process low-temperature terrestrial heat exchange in lower layer to realize the function of pipe heat exchange laid by post and terrestrial heat pump prefabricated hole. In the inner hole of pre-stress concrete post operated by closed steel post sharp, the U-shape heat exchanger, screw coil-pipe heat exchanger or other pipe heat exchanger is directly laid, while the space between the inner wall of post and the pipe heat exchanger is filled by stuffing. The pipe heat exchangers in the post are connected to the ground pipe line, and the pipe line of heat exchanger is filled by exchanging liquid. The invention via the heat exchange between exchange liquid, stuffing, post, and around soil-water system, form a underground low-temperature terrestrial heat exchanger of closed terrestrial heat pump.

Description

Technical field: [0001] The invention relates to a prestressed concrete pipe pile which uses the hollow pile core of the prestressed concrete pipe pile to embed a tubular heat exchanger device to convert low-temperature geothermal energy. The device has both the bearing characteristics of the pile foundation and low-temperature geothermal energy cycle heat exchange Capability of multifunctional prestressed concrete pipe piles. Background technique: [0002] At present, the known prestressed concrete pipe piles mainly refer to pretensioned prestressed concrete annular cross-section piles. The product specifications of pipe piles mainly include prestressed high-strength concrete pipe piles (codenamed PC), prestressed concrete pipe piles (codenamed PHC), prestressed concrete thin-walled pipe piles (codenamed PTC), and the outer diameters of different types of prestressed concrete pipe piles , mechanical properties, raw materials and structure requirements, design, selection, p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/58E02D5/50F24J3/08
CPCY02E10/125F24J3/083F24T10/15Y02E10/10
Inventor 张延军
Owner 张延军
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