Mid-deep bed terrestrial heat source heat pump system

Abstract

The invention discloses a mid-deep bed terrestrial heat source heat pump system. A mid-deep bed terrestrial heat in-well heat exchanger is mounted in a rock-soil layer; the mid-deep bed terrestrial heat in-well heat exchanger comprises an outer sleeve and an inner sleeve; the bottom end and the side wall of the outer sleeve are closed, the inner sleeve is placed in the outer sleeve, and the opening in the bottom end of the inner sleeve communicates with the bottom of the outer sleeve; the upper port of the outer sleeve communicates with a circular medium inflow pipeline; the upper port of the inner sleeve communicates with a circular medium outflow pipeline; the other ends of the circular medium inflow pipeline and the circular medium outflow pipeline communicate through an evaporator side of a high-temperature heat source type water source heat pump host machine; and a heat source side circulating pump is arranged in the circular medium outflow pipeline for driving a circular medium to flow downward along a gap between the inner wall of the outer sleeve and the outer wall of the inner sleeve. The mid-deep bed terrestrial heat source heat pump system disclosed by the invention only exchange mid-deep terrestrial heat energy on the premise of not extracting underground hot water, so that the mid-deep bed terrestrial heat is fully utilized to supply heat to a ground building.

Description

technical field [0001] The invention relates to the field of development and utilization of mid-deep geothermal energy, in particular to a mid-deep geothermal source heat pump system. Background technique [0002] At present, "smog" has become a major environmental problem in my country, especially in winter, where the emission of particulate matter from coal-fired heating is one of the important causes of smog. Government departments attach great importance to this issue and have issued a number of policies to change the traditional heating mode and use clean energy for heating, such as "coal to combustion", "coal to electricity" and other policies. [0003] As a clean energy, geothermal energy has received more and more attention for its rational development and utilization. The National Development and Reform Commission and the Energy Bureau jointly issued the "Thirteenth Five-Year Plan" for the Development and Utilization of Geothermal Energy in January 2017 ( Developme...

AI Technical Summary

Problems solved by technology

However, there are certain defects in these two technologies, which need to be solved.

[0007] Shallow ground source heat pump technology: Shallow geothermal wells occupy a large area and their application is limited; the cold and heat loads are unbalanced in winter and summer, and the energy efficiency of the system is seriously attenuated

[0008] Direct exploitation of deep-layer geothermal water heating technology: it can only be used in areas with rich groundwater resources, and its application is limited; direct exploitation of groundwater is difficult to recharge, resulting in waste and pollution of groundwater resources, and long-term extraction Groundwater, with risks such as geological structure collapse, is an unsustainable way of energy utilization

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