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Prediction and diagnosis method for blocking of recharge wells based on permeability coefficient model

A technology of permeability coefficient and diagnosis method, applied in the field of fault diagnosis of groundwater source heat pump system, can solve the problems of high diagnosis cost and poor achievability, and achieve the effect of strong achievability, reducing the possibility of failure and efficient operation.

Inactive Publication Date: 2014-08-20
XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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Problems solved by technology

This method overcomes the disadvantages of high diagnostic cost, poor realizability, and diagnostic delay in the prior art

Method used

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  • Prediction and diagnosis method for blocking of recharge wells based on permeability coefficient model
  • Prediction and diagnosis method for blocking of recharge wells based on permeability coefficient model
  • Prediction and diagnosis method for blocking of recharge wells based on permeability coefficient model

Examples

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Embodiment

[0058] Example: A residential area in Yangling adopts an underground water source heat pump system for winter heating. The heating period is 121 days. There are 12 wells used, of which 4 wells are pumping wells, and the corresponding numbers are 1# to 4#, and the remaining 8 wells It is a reinjection well, and the corresponding numbers are 5# to 12#. All wells are diving wells. The submersible pumps in the pumping wells are fixed-frequency pumps, so the pumping and irrigation volume of each well remains basically unchanged during the heating period. According to the well completion report of the community, the initial thickness of the aquifer is 55m, the well radius is 0.14m, and the infiltration recharge intensity is 0.31.

[0059] In order to predict whether overflow wells will occur during the operation period and to verify the accuracy of the prediction model, the permeability coefficient calculated from the measured water level in the first 49 days is used to fit the per...

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Abstract

The invention discloses a prediction and diagnosis method for blocking of recharge wells based on a permeability coefficient model. The method includes the steps that the water level and the flow of the pumping and irrigating wells of an underground water source heat pump system are measured regularly, permeability coefficients of all the recharge wells in different periods are calculated, and then the regression equation in which the permeability coefficients change along with time can be fitted; then, according to the function relation between the permeability coefficients and the water levels of the wells, through the combination of the permeability coefficient regression equation, the water levels of all the recharge wells and the time needed for well overflow are predicted when operation is completed, so that whether well overflow happens to the recharge wells or not in the operation stage is judged; finally, corresponding measures are taken according to the predicted result. The diagnosis method is reliable in result, easy to operate, high in realizability and applicable to diagnosing the blocking of the recharge wells of the underground water source heat pump system in China.

Description

technical field [0001] The invention belongs to the field of fault diagnosis of an underground water source heat pump system, and in particular relates to a method for predicting and diagnosing blockage of a recharge well. Background technique [0002] Groundwater source heat pump technology is a HVAC technology that uses shallow ground to meet the needs of users for heating and cooling. The successful application of this technology is an important measure to realize the scientific use of energy and solve the problem of energy shortage in our country. The recharge well is an important part of the water source side structure of the groundwater source heat pump system, and it is a necessary facility to realize and guarantee the recycling of groundwater. However, blockage of recharge wells is a problem that occurs in most groundwater source heat pump systems. The occurrence of clogging will cause the permeability of the aquifer around the reinjection well to decrease and the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F19/00
Inventor 王智伟惠一峰杨锋斌闫清张云龙闫增峰
Owner XI'AN UNIVERSITY OF ARCHITECTURE AND TECHNOLOGY
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