Hydrogen Delivery Line Nesting in Existing Pipelines for Leak Purging
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Solution Overview
Problem
The transportation and distribution of hydrogen face inefficiencies due to its low volumetric energy density, leading to high costs and logistical challenges, particularly in transporting green hydrogen from remote renewable energy sources to areas of high demand, where existing pipelines are ill-suited and initial capital costs for new infrastructure are prohibitive.
Innovation Solution
Adapting existing pipelines, such as natural gas and oil pipelines, by inserting a hydrogen delivery line made of fiber-reinforced polymer (FRP) pipe, which is surrounded by a sweeper gas to purge leaks, and using a safety pipe when necessary, to transport and distribute hydrogen, along with the option of utilizing lighter-than-air airships for bulk transport.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If new hydrogen pipelines are constructed, then hydrogen transport capability is improved, but capital costs and installation time increase significantly
Solution Approach 1:
The patent inserts a hydrogen delivery line inside an existing pipeline, creating a nested configuration where the hydrogen delivery line is contained within the larger existing pipeline infrastructure. This allows hydrogen transport capability to be added without constructing a completely new pipeline system, thereby reducing capital costs and installation complexity while maintaining transport reliability
Solution Approach 2:
The existing pipeline infrastructure is utilized for dual purposes: continuing its original function while simultaneously serving as a protective and transport medium for hydrogen delivery. This multi-functionality approach allows the same physical infrastructure to support both legacy operations and new hydrogen distribution, eliminating the need for dedicated new construction
2Device complexity
If hydrogen is transported through existing pipelines, then infrastructure costs are reduced, but pipeline material compatibility and safety deteriorate
Solution Approach 1:
A sweeper gas is introduced as an intermediary substance that flows outside the hydrogen delivery line within the existing pipeline. This sweeper gas serves multiple functions: it purges any hydrogen that leaks from the delivery line, maintains a safe atmospheric environment, and allows the existing pipeline materials to remain in contact with inert or compatible gas rather than direct hydrogen exposure
Solution Approach 2:
The hydrogen delivery line is nested within the existing pipeline, creating a protected inner channel for hydrogen transport. This nested configuration isolates hydrogen from direct contact with potentially incompatible pipeline materials while utilizing the existing infrastructure for structural support and transport pathway
3Quantity of substance
If traditional hydrogen storage tanks are used, then hydrogen storage is achieved, but cost and maintenance requirements increase
Solution Approach 1:
The system allows existing pipelines to serve dual functions as both transport conduits and storage vessels. Hydrogen can be injected into the existing pipeline infrastructure and stored within the pipeline network itself, eliminating the need for separate dedicated storage tanks. The pipeline infrastructure automatically provides storage capacity without requiring additional expensive storage equipment or specialized maintenance protocols
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 approach significantly reduces capital costs, installation time, and maintenance while enabling widespread and efficient distribution of hydrogen, leveraging existing infrastructure to overcome the limitations of traditional methods.
Implementation Method 1
a sweeper gas within the existing pipeline flows around an exterior of the hydrogen delivery line and purges any hydrogen that leaks from the hydrogen delivery line
Data Source
AI summary
A system uses existing pipelines, e.g., natural gas, oil, etc., to transport hydrogen to one or more distribution points. The disclosed hydrogen distribution system enables use of water, sewer, storm drain and other existing pipelines for local distribution. Hydrogen is produced from an energy source at a producing location. A safety pipe is located inside an existing pipeline configured to carry a first product and a hydrogen delivery line, configured to carry hydrogen, is placed inside the safety pipe such that a channel is formed between an exterior of the hydrogen delivery line and an interior of the safety pipe. Hydrogen is injected into the hydrogen delivery line and a sweeper gas is injected into the channel to purge any hydrogen that might be leaking from the hydrogen delivery line.