Partition running method for relieving underground cold/heat energy accumulative effect of buried pipe geothermal heat exchanger

Abstract

The invention discloses a partition running method for relieving an underground cold / heat energy accumulative effect of a buried pipe geothermal heat exchanger. Aiming at a system in which heat energy released towards the underground by the geothermal heat exchanger in summer and heat energy taken from the underground by the geothermal heat exchanger are not balanced, the geothermal heat exchanger is partitioned into an inner area and an outer area, the inner area and the outer area are put into operation respectively, the inner area runs in seasons of which heat energy exchange with the underground is relatively small, and the whole geothermal heat exchanger runs in seasons of which heat energy exchange with the underground is relatively large. The partition running method for relieving the underground cold / heat energy accumulative effect of the buried pipe geothermal heat exchanger can relieve the cold / heat energy accumulative effect caused after the working areas of the geothermal heat exchanger run for many years.

Description

technical field [0001] The invention relates to a method for operating a geothermal heat exchanger with vertically buried pipes in a ground source heat pump system, in particular to a method for operating the geothermal heat exchanger when the load of the geothermal heat exchanger is unbalanced in winter when it takes heat from the ground and releases heat to the ground in summer. Background technique [0002] As a renewable energy technology, ground source heat pump technology has been widely used in my country. At present, for the research on the operation of the ground source heat pump system, the operation mode of the buried pipe is fully open or fully stopped. This method of operation is simple and convenient for calculation. However, for large clusters of vertical buried tube heat exchangers in winter and summer when the heat load is unbalanced, the full-on and full-stop operation mode will cause the central area, and the perennial operation will cause the underground...

AI Technical Summary

Problems solved by technology

However, for large clusters of vertical buried tube heat exchangers in winter and summer when the heat load from the ground is unbalanced, the full-on and full-stop operation mode will cause the central area, and the perennial operation will cause the underground temperature to continue to increase or decrease, and the overall efficiency of the system will decrease. , and even after many years, the buried pipe in the area where the cumulative effect of cooling and heating loads is large will fail in the heavy load season

A commonly used method at present is to increase the auxiliary cold source or auxiliary heat source, which will increase the complexity of system investment and operation

Another commonly used method is to increase the number of buried pipes or increase the distance between buried pipes, which will increase the system investment and increase the occupied area, and sometimes cannot be realized due to site constraints

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