Pile imbedded helix tube type ground source heat pump system and heat transferring model of terrestrial heat exchanger thereof

Abstract

The invention discloses a pile-embedding spiral pipe typed ground source heat pump system and a heat transmission model of a geothermal heat exchanger thereof. A solid cylindrical surface heat source model is put forward for the first time and two analytic solution expressions of the heat transmission model is worked out by the Green function method. The system can sufficiently utilizes the underground area of a building, saves a great amount of expenses for boring and pipe embedding, reduces the initial investment of the ground source heat pump system, improves the construction efficiency and has convenient and quick construction. Furthermore, the heat transmission model of the pile-embedding spiral pipe geothermal heat exchanger can quantitatively analyze the effects of all parameters of the pile-embedding spiral pipe geothermal heat exchanger on the heat transmission capability and provides a basis for the engineering design. The structure of the pile-embedding spiral pipe typed ground source heat pump system comprises the geothermal heat exchanger which is connected with an air conditioning heat pump system by pipelines; the air conditioning heat pump system is connected with a conveying and end system in the building; the geothermal heat exchangers have the quantity of more than one; and each geothermal heat exchanger forms the pile-embedding spiral pipe-typed geothermal heat exchanger by building pile foundations and spiral pipes which are embedded in the pipe foundations.

Description

Technical field: [0001] The invention relates to a pile-buried spiral tube type ground source heat pump system and a heat transfer model of the geothermal heat exchanger in which a spiral tube is embedded in a pile foundation as a geothermal heat exchanger, and belongs to building environment and equipment engineering, refrigeration engineering technology and related heat transfer fields. Background technique: [0002] The ground source heat pump system is a high-efficiency energy-saving device that uses underground shallow geothermal resources (including groundwater, underground rock soil or surface water, etc.) to provide both heating and cooling. Among them, the buried pipe ground source heat pump system is less restricted by environmental conditions, so it is receiving more and more attention. It takes advantage of the relatively stable temperature of the underground soil. On the basis of inputting a small amount of high potential energy, it exchanges heat and cold with...

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Problems solved by technology

In 200620028157.6 "Spiral Coil Shallow Geothermal Conversion Pre-holed Cast-in-place Pile", although the spiral coil is applied to the pile, it is only for the pre-holed cast-in-place pile, and there is no detailed description of the ground source heat pump system

In addition, in the existing pile-buried pipe ground source heat pumps, no heat transfer analysis method for the pile-buried pipe geothermal heat exchanger has been proposed, which will become an important obstacle in the design and application of pile-buried pipes

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