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Efficient calculating method for parametrization design of vertical ground heat exchanger

A technology of parametric design and calculation method, which can be used in calculation, instrumentation, electrical and digital data processing, etc., and can solve problems such as large calculation errors and difficulty in realizing parametric design of vertical buried heat exchangers.

Inactive Publication Date: 2013-01-02
HUNAN UNIV
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Problems solved by technology

On the other hand, whether it is to obtain the g function value by table lookup and interpolation, or the "Load aggregation method" (Load aggregation method) and the Fourier transform spline method (FFT-s) and other methods, it will bring large calculation errors
Therefore, it is difficult to realize the parametric design of the vertical borehole heat exchanger with the calculation method of the g function and its derivation

Method used

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  • Efficient calculating method for parametrization design of vertical ground heat exchanger
  • Efficient calculating method for parametrization design of vertical ground heat exchanger
  • Efficient calculating method for parametrization design of vertical ground heat exchanger

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Embodiment Construction

[0048] One embodiment of the present invention method step is as follows:

[0049] 1. Such as figure 1 As shown, according to the usable surface area of ​​the vertical buried tube heat exchanger drilling group, a set of drilling parameter configurations is preliminarily selected: drilling spacing parameters D , the offset distance x , and the number of wells N ( N = m ?? n , m and n is the number of horizontal and vertical columns), drilling radius r b , drilling depth H , thermal conductivity of rock and soil k s , thermal diffusivity of rock and soil , the number of operating years of the heat pump system that needs to be designed and calculated n .

[0050] 2. In the ground source heat pump system, the heat that needs to be extracted from the ground or discharged into the ground by the buried pipe heat exchanger at each time of the year is divided by ( H ?? N ), expressed as a rectangular pulse sequence of hourly heat transfer heat flow per unit sh...

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Abstract

The invention discloses an efficient calculating method for parametrization design of a vertical ground heat exchanger. According to the efficient calculating method provided by the invention, the method comprises the steps of expressing the hourly heat absorbing and radiating heat flow of the vertical ground heat exchanger of a heat pump system as a rectangular pulse heat flow sequence; introducing a concept of underground rock dimensionless transient temperature response g function under the effect of unit rectangular pulse heat flow, so as to obtain the function with the integrating interval of [0, deltaF0]; and taking drill parameters into design calculation, so that the calculating result is accurate and reliable, the calculation time is greatly shortened, and the efficient calculation method is provided for achieving the parametrization design of the vertical ground heat exchanger.

Description

technical field [0001] The invention relates to the field of ground source heat pumps, in particular to an efficient calculation method for the parametric design of a vertical buried pipe heat exchanger. Background technique [0002] Among the ground source heat pumps, the vertical buried pipe geothermal coupling heat pump system is more and more widely used because of the stable temperature field of underground rock and soil and high energy efficiency. It is mainly used in heating, air conditioning and hot water supply systems of various buildings. The construction cost of the vertical buried tube heat exchanger is high, and the design of the heat exchanger is too large, resulting in a waste of initial investment and high operating costs; System operating efficiency. When designing a geothermally coupled heat pump system, the design calculation of the vertical buried tube heat exchanger is very critical. [0003] The operating period of the heat pump system is generally ...

Claims

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Application Information

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IPC IPC(8): G06F19/00
Inventor 陈友明张训水杜次元魏鹏飞
Owner HUNAN UNIV
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