Hollow circular truncated cone spiral energy pile structure capable of improving heat transfer efficiency

Abstract

The invention discloses a hollow circular truncated cone spiral energy pile structure capable of improving heat transfer efficiency. An energy pile well is arranged in solum, and is in a circular truncated cone shape, and the diameter of the energy pile upper bottom face is larger than that of the energy pile lower bottom face. A heat exchange pipe is arranged in the energy pile well and fixed, and the heat exchange pipe is composed of a heat exchange pipe inlet pipe section, a spiral heat exchange pipe section and a heat exchange pipe outlet pipe section which are sequentially connected. The energy pile well is backfilled through energy pile backfill materials. The spiral heat exchange pipe section is arranged at certain taper, spiral pipes are staggered in the radial direction, the heat disturbance intensity of the adjacent spiral pipes in the axial direction is weakened, and the heat transfer capacity of the spiral pipes in the axial direction is improved. Heat exchange fluid flows in from the upper bottom face of a circular truncated cone with the large radius, the heat exchange temperature difference between soil and the fluid is large, the heat short-circuit phenomenon of the backfill region at the energy pile upper portion is weakened to a certain degree, and the heat transfer efficiency of an energy pile is improved. Corrosion resistance is remarkably improved, and service life is greatly prolonged.

Description

technical field [0001] The invention relates to the technical field of buried pipes of a ground source heat pump system, in particular to a hollow circular platform spiral energy pile structure capable of improving heat transfer efficiency, and is mainly applicable to the technical field of ground source heat pumps for building heating and cooling. Background technique [0002] The ground source heat pump system uses the underground soil as a low-grade cold and heat source. Since the temperature of the underground soil is relatively constant, and the temperature range is very suitable for the efficient operation of the heat pump unit, it can effectively reduce the energy consumption of the unit operation and contribute to building energy conservation and emission reduction. Actively contribute. The buried pipe heat exchanger is the most critical component of the ground source heat pump system, and its heat transfer efficiency has an important impact on the design capacity ...

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Problems solved by technology

However, the layout of the buried pipes is vertical U-shaped, the contact area between the heat exchange fluid and the soil is small, and the heat transfer and heat transfer efficiency are not as good as the spiral energy piles.

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