Prefabricated reinforced concrete pipe piles with double helical tubular heat exchangers for ground source heat pumps

Abstract

The invention discloses a prefabricated reinforced concrete pipe pile with a ground source heat pump double-helical tubular heat exchanger. The prefabricated reinforced concrete pipe pile comprises the double-helical tubular heat exchanger, a reinforcement cage, supporting bends, metal protective sleeves, concrete, a heat exchanger fluid inlet, a heat exchanger fluid outlet and an exchange medium. The double-helical tubular heat exchanger is tied to the inside of the reinforcement cage. The exchange medium is arranged inside the double-helical tubular heat exchanger and distributed along the whole length of the pipe pile. Both the reinforcement cage and the double-helical tubular heat exchanger are made in the concrete to form the wall of the pipe pile, by concreting. The prefabricated reinforced concrete pipe pile has the advantages that the double-helical tubular heat exchanger is tied to the inside of the reinforcement cage during pipe pile construction in a factory, the double-helical tubular heat exchanger is buried in the wall of a concrete pipe after concreting, the pipe pile serves as a carrier for the double-helical tubular heat exchanger, the double-helical tubular heat exchanger is sunk into the earth during pile sinking, and construction of a pile foundation and burying of the tubular heat exchanger in a ground source heat pump reserved hole are integrated.

Description

technical field [0001] The present invention relates to a technique for integrating pile foundation construction with ground source heat pump prefabricated holes to bury tubular heat exchangers, in particular to a prefabricated reinforced concrete prefabricated concrete prefabricated heat exchanger with ground source heat pump double-helix tubular heat exchangers in the pipe wall. Stressed hollow piles. Background technique [0002] Currently known prefabricated reinforced concrete prestressed pipe piles refer to prestressed high-strength concrete pipe piles (code name PHC), prestressed concrete pipe piles (code name PC), prestressed concrete thin-walled pipe piles ( Codenamed PTC). The dimensions, mechanical properties, structural requirements, design, production, construction, and acceptance of different prefabricated reinforced concrete pipe piles shall comply with "Prestressed Concrete Pipe Piles" (Atlas No. 03SG409), "Technical Specifications for Building Pile Foundati...

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Problems solved by technology

In fact, after the construction of the prefabricated pipe pile is completed, various shapes of tubular heat exchangers are placed in the inner hole of the pipe pile, and the backfill material is filled between the wall of the pipe pile hole and the heat exchanger. Only the construction technology of the pipe pile avoids the need for drilling. The problems such as necking and collapse of the hole did not substantially solve the problem of the complicated construction process of drilling and burying the tubular heat exchanger. In addition, the heat transfer efficiency is also affected by the thermal conductivity of the backfill material.

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