Concentric Deep-Well Pipe Layout for Geothermal Heating and Desalination
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current methods for generating energy and producing potable water, such as desalination, rely heavily on burning hydrocarbons, contributing to global warming and are energy-intensive, while geothermal energy use is limited to specific zones and has low efficiency.
Innovation Solution
A system involving two concentric tubes drilled deep into the earth to harness internal thermal energy, where filtered fluid is heated and used for power generation or seawater desalination, with a pump and valve system to control pressure and vibrations, and optional secondary drillings for micro-fracturing to enhance heat transfer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If conventional desalination methods (evaporation, condensation, membrane filtration) are used, then potable water can be produced from seawater, but high energy consumption is required
Solution Approach 1:
The system uses the Earth's own internal thermal energy to heat the working fluid, eliminating the need for external energy sources. The geothermal heat naturally flows from the hot rock formations to the fluid circulating in the annular space, providing self-sustaining operation for both power generation and desalination processes
Solution Approach 2:
The same geothermal heat extraction system serves dual purposes: generating electricity through the organic Rankine cycle and providing thermal energy for seawater desalination. This multi-functional approach maximizes the utility of the geothermal resource while reducing overall energy consumption compared to separate systems
2Power
If hydrocarbons are burned for energy generation, then electrical power can be produced, but global warming is contributed
Solution Approach 1:
The system replaces combustion-based thermal power generation with a geothermal-driven organic Rankine cycle. Instead of burning hydrocarbons to heat water and generate steam, the system uses geothermal heat to vaporize an organic working fluid, which then drives the turbine for electricity generation, eliminating harmful emissions entirely
Solution Approach 2:
The invention changes the fundamental parameter of heat source from fossil fuel combustion to geothermal energy extraction. By utilizing the Earth's internal heat stored in hot rock formations, the system transforms from a carbon-intensive process to a clean, renewable energy source that produces electricity without greenhouse gas emissions
3Use of energy by moving object
If geothermal energy is used for power generation, then renewable energy can be harnessed, but the method is limited to specific zones and has low efficiency
Solution Approach 1:
The system divides the geothermal heat extraction process into distinct functional zones: an upper section for power generation using an organic Rankine cycle, and a lower section for direct seawater desalination. This segmentation allows the system to operate efficiently at various depths and locations, adapting to different geothermal gradient conditions across diverse geographic regions
Solution Approach 2:
The invention transitions from traditional horizontal drilling approaches to vertical deep-borehole configurations, accessing geothermal resources at much greater depths where temperatures are consistently high regardless of surface geographic conditions. This vertical dimension expansion enables geothermal energy utilization in previously inaccessible locations with moderate surface geology
4Temperature
If deep drilling is performed to access Earth's internal heat, then thermal energy can be harnessed, but system complexity increases
Solution Approach 1:
The system employs a nested tubular structure with multiple concentric pipes: an inner production casing, an outer completion casing, and an annular space for fluid circulation. This nested configuration allows simultaneous flow paths for working fluid heating and seawater desalination within a single drilled wellbore, reducing surface footprint and overall system complexity despite deep drilling requirements
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 method provides a clean, zero-emission energy source and desalination process that can be applied widely, reducing reliance on fossil fuels and offering a sustainable solution for energy and water production.
Implementation Method 1
heated to a specified temperature due to heat transferred from surrounding rock
Implementation Method 2
controlling pressure of the ascending fluid with a valve located in the upper end of the system and a pump near the beginning of the fluid transit in the system
Implementation Method 3
promoting heat transfer from surrounding rock by secondary directional drillings used to micro fracture the rock and then moving water through secondary drillings
Data Source
AI summary
A method and apparatus for heating fluids using the Earth's inner heat to generate power and desalinate water. Fluids include fresh water and sea water to be desalinized. The method involves passing a filtered fluid down a channel formed by two concentric tubes in a deep well defining inner and outer channels, to a depth at which the fluid reaches the needed temperature. Hot fluids pass into an inner channel and flow to surface with small heat loss, through an insulated pipe. The hot fluid may be vaporized to produce power, and returned to the system when condensed, forming a closed system, or it may be desalinize seawater in an integrated process that also produces electrical power.