Design method and device for medium-deep layer buried pipe heat pump heating system

Abstract

The invention discloses a middle-deep layer buried pipe heat pump heating system design method, and relates to the field of geothermal energy. When an existing medium-deep layer buried pipe geothermal heating system runs, water temperature fluctuation of an inlet and an outlet on the geomarginal side is large, more stratums are involved in 2000-3000 m medium-deep layer buried pipes, physical property parameters of rock-soil bodies are difficult to obtain, and the design of the system is very difficult. Therefore, the scheme provided by the invention is as follows: the design method of the medium-deep layer buried pipe heat pump heating system is realized based on the following devices: a building heating load module for acquiring building envelope parameters; the rock-soil thermophysical parameter module is used for acquiring rock-soil thermophysical parameters; the middle-deep layer buried pipe heat exchanger module is used for outputting a heat exchange result according to the collected building envelope parameters and the rock-soil thermophysical property parameters; determining modules of the heat pump heating system according to the heat exchange structure; the method comprises the following steps: processing building envelope parameters and rock-soil thermophysical parameters through a heat exchange model; the method is suitable for design and reference before construction of a medium-deep layer buried pipe heat pump heating system.

Description

technical field [0001] It relates to the field of geothermal energy, and specifically relates to a design method and device for a heat pump heating system of a medium-deep buried pipe. Background technique [0002] Heating is required in northern areas in winter, and the heating system will cause noise and air pollution. Therefore, "replacing coal with electricity" is the main way to promote clean heating in the north. Heat pump heating is the dominant way of "replacing coal with electricity", and its application area has reached one billion square meters, creating the largest scale in the world. However, there are still low system efficiency, poor operation stability, and difficulty in starting air source heat pumps at low ambient temperatures. Shallow buried pipe heat pump heat exchange system has low heat exchange intensity and large floor area, and it is difficult to achieve 100% same-layer recharge for underground water source heat pump system. [0003] Medium-deep bur...

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Problems solved by technology

[0006] The original intention of the design of the present invention is that the traditional heating method of replacing coal with electricity has the disadvantages of low system efficiency, poor operation stability, and difficulty in starting of the air source heat pump at low ambient temperature, low heat exchange intensity of the heat exchange system of the shallow buried pipe heat pump, and occupation of land. Large area, the groundwater source heat pump system is difficult to achieve 100% recharge in the same layer, etc. When the existing medium-deep buried pipe geothermal heating system is in operation, the water temperature of the inlet and outlet of the ground side fluctuates greatly, and the medium-deep buried pipe is 2000-3000 There are many formations involved in rice, and the physical parameters of rock and soil are difficult to obtain, which brings great difficulties to the design of the system; for this reason, the scheme provided by the present invention is:

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