Geothermal heat exchange system and its geothermal thermal power generation and geothermal heat pump system

Abstract

Provided are a ground temperature heat exchange system and a ground temperature heat energy power generation and ground temperature heat pump system. The ground temperature heat exchange system comprises a first main pipe, a second main pipe arranged at one side of the first main pipe and a plurality of branch pipes. Each group of branch pipes have a plurality of branch pipes with the same length and are respectively communicated with the first main pipe and the second main pipe. The lengths of the branch pipes of different branch pipe groups are different. Through an embodiment wherein branch pipes of at least a branch group are formed through connection of a plurality of sub-branch-pipes and adjacent sub-branch-pipes have different inner diameters or an embodiment wherein the calibers of the branch pipes of at least a branch group are formed through gradual shrinkage or gradual expansion of the inner pipe diameters of the branch pipes and the calibers of the first ends or the second ends of the branch pipes with different pipe lengths are different. The ground temperature heat exchange system can be applied to a ground temperature heat energy power generation and ground temperature heat pump system.

Description

technical field [0001] The invention relates to a heat exchange technology, in particular to a geothermal heat exchange system and a geothermal power generation and geothermal heat pump system. Background technique [0002] The main purpose of the downhole heat exchanger is to exchange heat between the ground and the ground, such as soil or groundwater. The way of heat exchange can be to take heat from the ground to the ground or place the excess heat on the ground. The first way is usually as a greenhouse Or for power generation, the second method is usually used in cooling rooms. [0003] Downhole heat exchangers are generally divided into U-shaped tubes, coils, and shell-like tubes, and shell-like tubes usually have a large heat exchange capacity. see figure 1 As shown, this figure is a schematic diagram of a shell-and-tube heat exchanger. This type of shell-and-tube heat exchanger 11 is arranged in a ground well 10 . There is a fluid 12 in the well 10 for exchanging ...

AI Technical Summary

Problems solved by technology

However, due to the restrictions on the shape of the shell-and-tube heat exchanger 11, the flow efficiency of the external fluid 12 of the shell-and-tube heat exchanger 11 is relatively poor. This type of uneven flow can usually be summarized as (1) the unevenness of the external fluid outside the small tube. Uniform flow and (2) non-uniform flow of the working fluid in the small tube

Images