Online monitoring method for soil temperature in soil source heat pump system

Abstract

The invention discloses an online monitoring method for soil temperature in a soil source heat pump system. The online monitoring method comprises the steps of arranging a temperature sensor I on a water inlet main pipe of a ground heat exchanger, and obtaining the water inlet temperature T3 of the ground heat exchanger; arranging a temperature sensor II on a water outlet main pipe of the ground heat exchanger, and obtaining the water outlet temperature T4 of the ground heat exchanger; arranging a flow sensor on the water outlet main pipe of the ground heat exchanger, and obtaining the actualflow V1 of a ground source side circulating water pump of the heat pump system; and regulating the flow V1=V0 of a ground source side circulating water pump of an industrial control computer, and computing soil temperature with a soil average temperature formula in real time. According to the online monitoring method, all ground heat exchangers and soil heat exchange principles are black-boxed, and the soil average temperature is computed based on the group pipe heat transfer model of the ground heat exchanger; the accuracy of monitoring data can be improved, and the arrangement of diffusion monitoring wells is not required; and the monitoring cost can be reduced.

Description

technical field [0001] The invention relates to the field of air conditioning, in particular to an online monitoring method for soil temperature in a soil source heat pump system. Background technique [0002] The soil temperature monitoring of the current soil source heat pump system is realized through the test data of the diffusion monitoring well. A ground source heat pump system generally selects 1 to 2 buried tube heat exchangers, and around each selected buried tube heat exchanger Three diffusion monitoring wells are set up to monitor the temperature of different soil layers around the buried tube heat exchanger. [0003] The buried tube heat exchangers of the ground source heat pump system usually have dozens to thousands of ports. Due to the large number, the water conservancy imbalance between the buried tube heat exchangers is prone to occur, which leads to different ground tube heat exchangers from the soil There is a large difference in the heat gain in the hea...

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Problems solved by technology

[0003] The buried tube heat exchangers of the ground source heat pump system usually have dozens to thousands of ports. Due to the large number, the water conservancy imbalance between the buried tube heat exchangers is prone to occur, which leads to different ground tube heat exchangers from the soil There is a large difference in the heat gain in the ground pipe heat exchanger, which leads to a large difference in the temperature of different soil layers around different buried tube heat exchangers

[0004] In the existing monitoring method, there are few points for setting diffusion monitoring wells, and the temperature monitored by the diffusion monitoring wells cannot reflect the difference in temperature of different formations around different buried tube heat exchangers. The regulation of the ground source heat pump system will easily lead to the imbalance of soil temperature, which will cause the energy efficiency of the ground source heat pump system to drop significantly or even be scrapped.

The main reason for the current situation is the lack of scientific and convenient online monitoring methods for soil temperature

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