Global Land and Water Constraints Limit Electrolytic Hydrogen Production Potential

Why It Matters

Designers and engineers planning for large-scale renewable energy infrastructure, particularly for hydrogen production, must consider the finite nature of land and water. Ignoring these resource limitations can lead to project infeasibility, increased costs, and unintended environmental consequences, necessitating a more integrated approach to resource planning and allocation.

Key Finding

The world may not have enough land and water to produce all the hydrogen needed by 2050 using renewable energy, meaning some countries will need to import hydrogen or the industries that use it, while others could become major exporters.

Key Findings

• Less than 50% of projected global hydrogen demand in 2050 could be met through local production without facing land or water scarcity.
• Resource-rich regions like Southern and Central-East Africa, West Africa, South America, Canada, and Australia are identified as potential leaders in hydrogen export.
• Many countries will face constraints in achieving self-sufficiency in electrolytic hydrogen production due to domestic resource limitations.

Research Evidence

Aim: To assess the global land and water resource constraints on achieving projected electrolytic hydrogen demand by 2050 using wind and solar power.

Method: Comparative analysis and scenario modelling

Procedure: The study established a reference scenario for hydrogen demand in 2050 and compared it against country-specific land and water availability, considering different land allocation scenarios for renewable energy installations.

Context: Global energy policy and renewable energy infrastructure development

Design Principle

Resource-aware design: Ensure that the design and scale of a project are aligned with the sustainable availability of critical natural resources.

How to Apply

When designing a hydrogen production facility, conduct a thorough assessment of local land suitability for renewable energy infrastructure and the availability of freshwater resources, considering potential competition from other sectors.

Limitations

The study's findings are based on projected demand and resource availability, which can be subject to change. It also assumes a specific technological pathway for hydrogen production.

Student Guide (IB Design Technology)

Simple Explanation: Making lots of hydrogen using wind and solar power needs a lot of land and water. This study shows that if we try to make all the hydrogen we'll need by 2050, many places won't have enough land or water to do it locally. Some countries with lots of land and water could become big hydrogen exporters.

Why This Matters: This research highlights that even 'green' technologies like hydrogen production have real-world resource limits. Understanding these limits is crucial for designing projects that are not only technically feasible but also environmentally sustainable and economically viable in the long term.

Critical Thinking: How might the competition for land and water resources between hydrogen production and other essential sectors (e.g., agriculture, urban development) impact the feasibility of large-scale hydrogen projects?

IA-Ready Paragraph: The global push for electrolytic hydrogen production, while crucial for decarbonization, faces significant constraints from land and water availability. Research indicates that meeting projected 2050 hydrogen demand through local renewable energy sources could be limited by these resources, suggesting a need for careful site selection, resource-efficient technologies, and international resource-sharing strategies.

Project Tips

• When proposing a design that relies on significant resource input (like water or land), research the local availability and potential conflicts for those resources.
• Consider alternative locations or technologies that might have a lower resource footprint.

How to Use in IA

• Use this research to justify the selection of a project location based on resource availability, or to identify potential challenges and propose mitigation strategies related to land and water use.

Examiner Tips

• Demonstrate an understanding of the environmental and resource implications of your design choices, not just the technical aspects.

Independent Variable: Land allocation for renewable energy infrastructure, Water availability

Dependent Variable: Electrolytic hydrogen production potential, Hydrogen demand

Controlled Variables: Net-zero emissions targets, Renewable energy sources (wind and solar), Electrolysis technology

Strengths

• Provides a global perspective on resource constraints.
• Quantifies potential limitations for hydrogen production.

Critical Questions

• What are the ethical considerations of prioritizing land and water for hydrogen production over other societal needs?
• How can technological advancements in electrolysis or renewable energy efficiency mitigate these resource constraints?

Extended Essay Application

• Investigate the feasibility of a hydrogen production facility in a specific region by analyzing its land and water resource availability and potential conflicts with existing land uses.

Source

Global land and water limits to electrolytic hydrogen production using wind and solar resources · Nature Communications · 2023 · 10.1038/s41467-023-41107-x