Heat-pipe type heat extraction integrated with combined cooling power and heating exploitation-utilization integrated geothermal system
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Solution Overview
Problem
Current geothermal energy extraction methods face challenges such as high pumping power consumption, working medium loss, pipeline scaling, and groundwater recharge, and lack a comprehensive solution for combined cooling, power, and heating utilization.
Innovation Solution
A heat-pipe type heat extraction system integrated with combined cooling and heating, utilizing an underground heat pipe with a steam pump, absorption beds, condensers, and valve assemblies to control steam flow and refrigeration cycles, allowing for dual-mode heat utilization without auxiliary power and minimizing medium loss and environmental impact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If traditional geothermal exploitation extracts underground hot water, then heat extraction is achieved, but pumping power consumption is high and working medium loss occurs
Solution Approach 1:
The patent extracts only the thermal energy from underground hot water through heat exchangers, separating the heat extraction function from water extraction. The underground hot water remains in the formation while its thermal energy is transferred to a working fluid in the heat exchanger, eliminating the need to pump large volumes of water to the surface and thereby reducing pumping power consumption and working medium loss.
Solution Approach 2:
The patent introduces a working fluid as an intermediary substance in the heat exchanger to transfer thermal energy from underground hot water to the power generation system. This intermediary approach allows heat extraction without direct water extraction, reducing the environmental impact and energy consumption associated with pumping and treating large volumes of geothermal water.
2Productivity
If underground hot water is extracted for geothermal exploitation, then heat utilization is achieved, but pipeline scaling and groundwater recharge problems occur
Solution Approach 1:
The patent extracts only the thermal energy from underground hot water through heat exchangers, leaving the water in the formation. This separates the heat utilization function from water extraction, thereby eliminating pipeline scaling issues associated with transporting hot water and groundwater recharge problems caused by surface discharge.
Solution Approach 2:
The patent uses a working fluid in the heat exchanger as an intermediary to transfer heat from underground water without direct contact between the geothermal water and the surface infrastructure. This prevents scaling in pipelines and equipment while the discharged water can be naturally recharged into the formation without environmental contamination.
3Adaptability or versatility
If steam generated by heat pipe is used for power generation and refrigeration, then comprehensive utilization is achieved, but system complexity increases
Solution Approach 1:
The patent designs the power generation system to serve multiple functions: the steam turbine generates electricity while the condenser provides cooling for the power cycle, and the evaporator in the absorption refrigeration system provides additional refrigeration. This multi-functional design achieves comprehensive cooling and heating utilization without proportionally increasing system complexity.
Solution Approach 2:
The patent merges the power generation cycle and absorption refrigeration cycle into a unified system where the steam turbine exhaust drives the absorption chiller. This integration allows both power generation and refrigeration to operate from a single heat source, achieving comprehensive utilization while sharing common components like the heat exchanger and working fluid loops.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This system efficiently extracts and utilizes geothermal energy for continuous refrigeration and power generation, avoiding medium loss and environmental pollution, with adjustable liquid flow to maintain optimal operation and match energy supply and demand, enhancing geothermal resource exploitation and utilization efficiency.
Implementation Method 1
Through a gas-liquid phase change of the working medium in the heat pipe, the heat can be rapidly transferred from the underground high-temperature thermal storage to the ground surface
Implementation Method 2
The heat pipe is one of elements with the highest heat transfer efficiency known at present
Implementation Method 3
a steam pump, a first absorption bed, a second absorption bed, a first condenser, an electronic expansion valve, an evaporator
Implementation Method 4
the first absorption bed, the second absorption bed and the steam turbine are all connected to an outlet of the steam pump
Implementation Method 5
a first condenser, an electronic expansion valve, an evaporator are connected end-to-end in sequence
Implementation Method 6
the first condenser, an electronic expansion valve, an evaporator are connected end-to-end in sequence
Data Source
AI summary
A heat-pipe type heat extraction integrated with combined cooling power and heating exploitation-utilization integrated geothermal system includes an underground heat pipe, a steam pump, a first absorption bed, a second absorption bed, a first condenser, an electronic expansion valve, an evaporator, a liquid storage tank, a balance valve, a steam turbine, an generator connected to the steam turbine, a second condenser, a heat utilization device connected to the second condenser, a pressurizing pump connected to the second condenser, and relevant linkage valve assemblies. The system controls a flow direction and a flow rate after heat pipe steam is extracted from the ground through the steam pump and the regulating valves on the refrigeration side and the power generation side, so as to select the refrigeration/electric heating single-mode heat utilization or adjust flow distribution during refrigeration/electric heating dual-mode combined use.