Heat insulation type multiple group tubular heat exchanger geo-energy converting prestress concrete tubular pile

Abstract

The geothermal energy converting pre-stressed concrete pipe pile has several heat insulating tubular heat exchangers embedded into the concrete pipe pile for bearing, retaining and converting shallow low temperature geothermal energy. The tubular heat exchanger inserted into the concrete pipe pile solidifies may be U-tube heat exchanger, coil heat exchanger or heat exchanger in other shape. There are backfill material filled in the space between the pile pipe and the tubular heat exchangers, and heat insulating material filled near the pile top. The tubular heat exchanger is connected to ground pipeline and filled with heat exchange fluid. Through heat exchange between the heat exchange fluid inside the tubular heat exchanger and backfill material and the heat insulating material and the heat exchange between the soil and water around the pile, one closed underground geothermal energy heat exchanger with geothermal heat pump is formed.

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 multiple sets of tubular heat exchanger devices to convert low-temperature geothermal energy. The device has both the bearing characteristics of the pile foundation and the low-temperature geothermal energy cycle. Multifunctional prestressed concrete pipe piles with heat transfer capacity. 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,...

AI Technical Summary

Problems solved by technology

In order to overcome the existing prestressed concrete pipe piles that only consider the bearing and support functions and ignore their function of utilizing the shallow geothermal gradient, and change the closed ground source heat pump technology with high initial drilling costs, complicated pipe construction, and the need for solid sections. Due to the adverse effects of pile foundations, low heat exchange efficiency of a group of U-shaped coils, low heat exchange efficiency of hollow pipe pile cores, and the reality that near-surface pipelines need to be kept warm in winter, the present invention can provide a thermal insulation multi-group tubular heat exchanger Heater ground energy conversion prestressed concrete pipe piles, the pile foundation can not only bear load, retain soil support, foundation reinforcement, but also can conveniently carry out closed cycle conversion of shallow low-temperature geothermal energy

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