Geothermal heat utilization system and operation method for geothermal heat utilization system
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Solution Overview
Problem
Geothermal heat utilization systems face blockage issues when underground water from upper and lower aquifers with different qualities are mixed, leading to clogging of well openings.
Innovation Solution
A geothermal heat utilization system with separate wells and pipes for each aquifer, using heat exchangers to pump hot and cold water from one aquifer while preventing mixing, and incorporating switching units and pumps to enhance efficiency and prevent blockage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If underground water from upper and lower aquifers are mixed to provide both hot and cold water, then heating and cooling can be achieved, but the well openings become blocked due to chemical reactions between different quality waters
Solution Approach 1:
The system divides the water supply into separate channels: one well dedicated to hot water supply and another well dedicated to cold water supply. This segmentation prevents mixing of waters with different qualities, eliminating blockage while maintaining both heating and cooling capabilities through separate flow paths.
2Device complexity
If a single well is used to supply both hot and cold water, then the system structure is simplified, but mixing of different quality waters causes blockage of well openings
Solution Approach 1:
Instead of using a single well for both hot and cold water, the system employs two separate wells with dedicated functions. This segmentation prevents harmful mixing while maintaining operational reliability, accepting increased structural complexity as a necessary trade-off to avoid blockage issues.
3Reliability
If separate wells and pipes are used for upper and lower aquifers to prevent mixing, then well blockage is prevented, but the system complexity increases
Solution Approach 1:
The system implements segmentation by assigning dedicated wells and pipes to specific aquifers and functions (hot water supply from upper aquifer, cold water supply from lower aquifer). This clear functional separation prevents mixing and blockage while organizing system complexity in a manageable and maintainable structure.
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
Prevents well blockage by maintaining separate water flows from upper and lower aquifers, allowing simultaneous use of hot and cold water for heating and cooling, and improves pump efficiency by reversing heat storage and supply.
Implementation Method 1
a first heat exchanger connected to the first pipe; and a second heat exchanger connected to the second pipe
Data Source
AI summary
The geothermal heat utilization system is capable of supplying underground water of an upper aquifer from the first upper opening to the second upper opening via the first pipe, and capable of supplying underground water of a lower aquifer from the second lower opening to the first lower opening via the second pipe. Further, the geothermal heat utilization system is configured to pump hot water and at the same time, pump cold water.