Compensated shallow geothermal energy conversion device in the same well for geothermal energy central air conditioning

Abstract

The invention discloses a compensation type shallow geothermal energy same-well conversion device for a geothermal energy central air conditioner, which includes a water source well and a well cover, an inner well pipe, an outer well pipe, a water outlet pipe, a return water pipe and a submersible pump, wherein the outer well pipe Set on the inner side of the water source well, the inner well pipe is set in the center of the outer well pipe, and there are at least two conical isolation support layers between the inner well pipe and the outer well pipe; the outlet pipe carries the submersible pump and is hoisted at the water level line in the inner well pipe Next, a plurality of return pipes divert water to the area between each tapered isolation support layer; the inner well pipe is provided with a compensation structure. The invention can allow the lengths of the inner well pipe and the outer well pipe to be not completely equal, reduce construction difficulty, have a wide allowable range for cutting errors and welding errors, and improve work efficiency. Overcome the problem of loose butt joint of multiple isolation support layers and uneven load bearing in the underground blind zone.

Description

technical field [0001] The invention belongs to the field of geo(thermal) energy central air-conditioning and relates to a shallow-layer geo(thermal) energy utilization conversion device in the same well, in particular to a geo(thermal) energy central air-conditioning geo(thermal) energy utilization conversion device in the same well. Background technique [0002] Geothermal (thermal) energy central air-conditioning is a central air-conditioning system that uses groundwater with a constant temperature for many years as the medium for transmitting geothermal energy. Through the heat pump unit, the temperature of the water is raised or lowered to achieve the purpose of cooling and heating, and to provide cold and heat sources for buildings. Because of its high energy efficiency ratio, it saves 40-60% energy compared with other traditional forms of central air conditioners, and has a remarkable effect of energy saving and consumption reduction. It is gradually favored by governm...

AI Technical Summary

Problems solved by technology

However, since the well depth is usually hundreds of meters, the outer well pipe and the inner well pipe are welded independently. In this structure, the inner well pipe and the outer well pipe have no load-bearing relationship. The strong supporting force of the well cover will cause great technical problems. It is very difficult to install or maintain, and the wellhead sealing layer is also easy to reduce the service life due to the pressure of the well cover.

The implementation of this scheme still needs a lot of special designs to meet the standard, which is very difficult in practical application

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