Heat pump system and method for achieving efficient evaporation through geothermal well

Abstract

The invention discloses a heat pump system and method for achieving efficient evaporation through a geothermal well, and relates to the field of geothermal energy development. The heat pump system comprises a stepped underground evaporator, a compressor, a condenser, a liquid storage tank and a throttling valve. The underground evaporator comprises an inner pipe and an outer pipe, the inner pipe is designed to be of a multi-section structure, and each section is composed of a gas flow guide pipeline, a baffle plate and a seepage hole. Under the action of the structure, liquid working media flowing into the underground evaporator flow downwards in the manner of being tightly attached to the inner wall of the outer pipe, absorb heat from underground rock mass to be gasified and become gaseous working media to flow upwards to the ground. Compared with the prior art, the designed underground evaporator cannot generate the gas-liquid entrainment and liquid accumulation effects, efficient evaporation of the liquid working media can be achieved through the geothermal well, heat supply through water pump circulation is not needed, ground equipment needed by the heat pump system is simplified, the running efficiency of the heat pump system can be obviously improved, and then the overall economical efficiency of the ground source heat pump system is improved.

Description

technical field [0001] The invention relates to the field of geothermal energy development, in particular to a heat pump system and method for realizing high-efficiency evaporation by utilizing geothermal wells. Background technique [0002] With the reduction of fossil fuel reserves and the increasingly serious environmental problems brought about by their development and utilization, renewable and non-polluting new energy sources have attracted much attention. Compared with other renewable energy sources, geothermal energy is stable and reliable, and is not affected by factors such as weather, seasons, climate, and diurnal changes, and is more suitable as the basic energy source for heating and power systems. At present, the development and utilization of geothermal resources not only includes direct utilization such as heating and planting, but also can realize geothermal cooling and power generation of medium and high temperature geothermal resources. [0003] There is ...

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Problems solved by technology

[0006] However, due to the long-term operation of the ground source heat pump, the soil temperature will gradually drop, which will lead to problems such as reduced efficiency of the heat pump unit and insufficient heating capacity.

In order to reduce the drop rate of soil temperature, it is necessary to lay a large area of ​​heat exchange pipes, which will increase the initial investment cost and reduce the economy of the system, which restricts the widespread promotion of this technology to a certain extent.

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