Phase change energy pile, ground source heat pump heat exchange system and manufacturing method

Abstract

The invention discloses a phase change energy pile, a ground source heat pump heat exchange system and a manufacturing method. The phase change energy pile comprises a pile body, a reinforcing cage, aheat exchange tube, concrete and a plurality of steel balls, wherein the reinforcing cage, the heat exchange tube, the concrete and the plurality of steel balls are arranged in the pile body, the heat exchange tube is fixed to the inner side of the reinforcing cage, the concrete is filled in gaps among the pile body, the reinforcing cage and the heat exchange tube, the steel balls are uniformly distributed in the concrete, phase change materials are arranged in the steel balls in a sealing mode, and a heat exchange carrier is arranged in the heat exchange tube. According to the phase change energy pile, the ground source heat pump heat exchange system and the manufacturing method, in the heat exchange tube heat carrying fluid circulation process, more energy is absorbed by and stored in the phase change materials, and meanwhile the thermal conductivity of the pile body is improved by the steel balls, so that the heat exchange efficiency of the phase change energy pile is greatly improved, the temperature change inside the pile body is uniform, the temperature difference stress is reduced, and the service life of the phase change energy pile is prolonged; and steel ball packages are adopted as coarse aggregate for pile body pouring, so that the leakage of the phase change materials can be prevented, the rigidity of the pile body can be meanwhile ensured, and the bearing capacity requirement is met.

Description

technical field [0001] The invention relates to the technical field of civil engineering, in particular to a phase change energy pile, a ground source heat pump heat exchange system and a manufacturing method. Background technique [0002] Phase change material is a material that realizes energy storage and release through the mutual conversion between solid-liquid-gas three phases. Phase change materials have the ability to undergo multiple phase change cycles, and can continuously complete stable heat absorption and release processes. Therefore, they are widely used in various aspects such as aerospace, clothing, refrigeration equipment, military communications, and electric power. The rational use of phase change materials in buildings can improve the indoor thermal environment, reduce the running time of air conditioners, and reduce building energy consumption. The energy pile is a new technology combining the traditional ground source heat pump technology with the pile...

AI Technical Summary

Problems solved by technology

However, the above two methods have certain problems in actual engineering: for traditional energy piles, metal tubes are used as heat exchange tubes, the cost is relatively high, the manufacturing process is complicated, and it cannot be applied in actual engineering construction; and phase change materials The fluid has high requirements on the water pump and requires a large power. Secondly, the cost of this composite fluid is relatively high, and the wear on the heat exchange tube is relatively large.

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