An energy harvesting and energy storage device based on piled raft foundation

Abstract

An energy harvesting and energy storage device based on a piled raft foundation, including a raft and a pile foundation, an energy geotextile is arranged between the raft and the weak soil layer, and a horizontal first The heat pipe, the pile foundation is vertically arranged in the weak soil layer, the second heat pipe is arranged in the pile foundation, the first heat pipe of the two layers of the raft and the energy geotextile passes through the second joint, and the first heat pipe of the energy geotextile passes through the second joint. The heat pipe and the second heat pipe are connected by joints; the raft and the energy geotextile set under the raft are divided into multiple units, and each unit includes a plurality of pile foundations, and the first pile foundation in two adjacent pile foundations The two heat-conducting pipes are connected through a connecting pipe, and the connecting pipe is also connected with the second heat-conducting pipe through a joint. By adopting the above-mentioned structure, the length of the underground heat pipe is greatly increased, the heat exchange efficiency is increased, and the land area occupied by the piled raft foundation is effectively used to improve the utilization rate of geothermal energy.

Description

technical field [0001] The invention relates to the field of development and utilization of geothermal energy, in particular to an energy collection and energy storage device based on a pile-raft foundation. Background technique [0002] Geothermal resources are a kind of renewable energy stored in the depths of the earth. They have a wide range of distribution. If they can be developed and utilized reasonably, their economic benefits are high, and they are very necessary for the development and utilization of geothermal energy. Heat pump technology is a heating and cooling technology that uses shallow underground heat sources, which can achieve cooling in summer and heating in winter. The development and utilization of geothermal resources in foreign countries has been quite in-depth research and has achieved remarkable results. However, the development and utilization of geothermal resources in my country is quite limited at present. Utilization, how to achieve efficient u...

AI Technical Summary

Problems solved by technology

The development and utilization of geothermal resources in foreign countries has been quite in-depth research and has achieved remarkable results. However, the development and utilization of geothermal resources in my country is quite limited at present. Utilization, how to achieve efficient utilization of geothermal resources and rational use of the land area occupied by geothermal pumps is a problem worth studying

[0003] The construction efficiency of geothermal collection devices in the prior art is low. For example, in the Chinese patent "A PPC Energy Pile and Manufacturing Method" (patent application number 201210298385.5), hollow piles with larger diameters are made to utilize the larger diameter of the piles. The liquid is stored in the space, and the collection of geothermal energy is realized through the energy exchange between the liquid and concrete. This invention can indeed realize the development and utilization of geothermal energy, but it has the following disadvantages: (1) The manufacturing process of the large-diameter hollow pile in this invention The construction is difficult, and the soil inside the pile needs to be excavated

(2) An inspection channel with a large hole diameter is set at the pile body, which affects the bearing capacity of the pile foundation

(3) The inspection channel set in this invention is below the ground level. If a problem occurs during operation, the soil above the inspection channel must be dug out first. The efficiency of the entire inspection process is low. If there is a problem with the heat pipe, it is difficult to carry out the inspection. Overhaul and Replacement

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