01
Energy In
Where did the electricity, heat, fuel, and process energy come from?
The energy transition needs better accounting
Replace what wastes energy.
Replace Fuels examines how energy, materials, and industrial systems actually perform. We apply exergy analysis, life cycle accounting, material traceability, and systems thinking to expose avoidable waste and accelerate cleaner alternatives.
The objective is not to make conventional systems look slightly greener. It is to determine whether they should continue to exist at all.
- Exergy Analysis
- Life Cycle Analysis
- Material Traceability
- Technology Intelligence
- Energy Access
Why replace
Clean is not a label. It is a complete accounting.
02
Materials In
What was mined, transported, refined, manufactured, and consumed?
03
System Output
How much useful work was actually produced?
04
Consequences Out
What pollution, waste, social harm, land disruption, water use, and disposal burden remained?
A system is only sustainable when its complete energy, material, environmental, social, and economic balance can withstand scrutiny.
Exergy analysis
Measure useful energy, not just energy consumed.
Traditional efficiency measurements can hide enormous losses. Exergy analysis evaluates the useful work potential of energy and materials as they move through a system. It identifies where valuable energy quality is destroyed and where redesign, heat recovery, electrification, process integration, or complete replacement can deliver a better result.
- Energy and Materials
- Conversion Process
- Useful Work
- Recoverable Energy
- Destroyed Exergy
- Environmental Burden
Industrial Processes
Analyze furnaces, reactors, grinding circuits, separation systems, chemical plants, mines, refineries, and manufacturing facilities.
Electricity Systems
Evaluate generation, transmission, distribution, storage, conversion losses, grid stability, and useful delivered energy.
Transportation
Compare internal combustion, battery electric, hydrogen, rail, marine, aviation, public transit, and shared mobility systems.
Buildings and Communities
Improve heating, cooling, insulation, district energy, heat recovery, microgrids, clean cooking, and resilient local power.
Improve or replace
Improve the process or replace it entirely.
Conventional approach
- Pollutive pyrometallurgy
- High temperature processing
- Large thermal losses
- Combustion based heat
- Significant emissions
- Difficult waste streams
Potential replacement pathways
- Hydrometallurgical processing
- Electrochemical extraction
- Hydrogen assisted processing
- Renewable electricity
- Closed water circuits
- Heat recovery
- Selective separation
- Material recycling
The right answer is not always to eliminate pyrometallurgy. Advanced furnaces, renewable electricity, hydrogen based heat, plasma systems, better refractories, process controls, and heat recovery may radically improve performance. Replace Fuels compares improvement against replacement to identify the solution with the strongest complete system outcome.
Life cycle analysis
An electric vehicle is only as clean as the system behind it.
A vehicle with no tailpipe emissions can still carry a substantial environmental and social burden. The complete analysis must include mineral extraction, refining, electricity generation, cell manufacturing, vehicle production, transportation, battery life, repairability, recycling, and final disposal.
Mine — Extraction of lithium, nickel, graphite, copper, and other minerals, with impacts that vary by method, geography, water availability, energy source, and regulation.
Moving emissions from the exhaust pipe to a power plant, mine, refinery, or distant community does not eliminate them.
Electricity Source
An electric vehicle charged by a clean and efficient grid has a very different life cycle result from one powered by high emission electricity.
Material Origin
Battery chemistry must be evaluated according to where its materials came from, how they were produced, and whether the supply chain is ethical and traceable.
Useful Life
Durability, repairability, second life applications, modular replacement, recycling, and material recovery can be as important as initial chemistry.
Materials
Better batteries begin with better materials.
Battery development should reduce dependence on materials associated with severe environmental damage, concentrated supply chains, exploitative labour, or applications where the material may create greater value elsewhere.
Co
Cobalt
Cobalt offers important electrochemical performance, but parts of the Democratic Republic of the Congo cobalt supply chain have been associated with dangerous child labour and other serious human rights concerns. The objective should be traceable sourcing, reduced cobalt intensity, responsible formalization, effective recycling, and development of competitive alternatives.
Li
Lithium
Lithium is essential to many current battery systems, but its extraction can create significant water, land, chemical, and community impacts, and those impacts vary by extraction method, geography, water availability, energy source, processing, and regulatory standards. Lithium is also valuable for glass, ceramics, medicine, alloys, and other uses. Every application should be evaluated against material scarcity, recoverability, and total social value.
Ni
Nickel
High performance nickel chemistries can deliver strong energy density, but mining and refining may carry substantial emissions, waste, and ecological consequences.
C
Graphite
Natural and synthetic graphite must be compared according to mining impacts, purification energy, manufacturing emissions, geographic concentration, and recyclability.
V
Vanadium
Vanadium flow batteries can offer long operating life, high recyclability, non degrading electrolyte value, fire resistance, and suitability for stationary storage. Their role should be evaluated based on full project requirements rather than vehicle focused energy density.
Fe+
Iron, Sodium, Sulfur, Zinc, Silicon, and Organic Materials
Abundant and lower cost materials may enable safer, more geographically distributed, and more ethical storage systems. Each chemistry should be judged by the application it serves, not by a single universal performance metric.
There is no perfect battery. There is only the best chemistry, architecture, and material system for a defined application.
Energy storage compendium
Storage is not one technology.
- Lithium ion batteries
- Sodium ion batteries
- Solid state batteries
- Vanadium flow batteries
- Iron flow batteries
- Zinc based batteries
- Metal air batteries
- Sulfur based batteries
- Organic flow batteries
- Supercapacitors
- Hybrid battery systems
Ion transport and reversible chemistry, from minutes of grid response to many hours of shifted supply.
The correct storage solution depends on duration, location, climate, power requirements, available materials, safety, land use, infrastructure, response time, cost, useful life, and recyclability.
Technologies
A compendium of what can replace finite fuels.
- Photovoltaic solar
- Concentrated solar power
- Building integrated solar
- Perovskite and tandem cells
- Agrivoltaics
- Floating solar
- Solar thermal systems
- Onshore wind
- Offshore wind
- Floating offshore wind
- Airborne wind
- Small distributed wind
- High altitude wind concepts
Replace Fuels separates physical potential, laboratory performance, commercial readiness, scalability, and unsupported claims. Promising technology deserves attention, but every claim must survive engineering and economic scrutiny.
Energy poverty
Energy poverty is not an acceptable engineering outcome.
655 million people
Approximately 655 million people still live without access to electricity, according to international energy access reporting released in 2026.
Source: International Energy Agency1.18 billion people
World Bank research has estimated that at least 1.18 billion people experience energy poverty when the ability to use electricity meaningfully is considered, not merely whether a connection exists.
Source: World BankAbout 2 billion people
Around two billion people continue to lack access to clean cooking and depend on polluting fuels that damage health, restrict opportunity, and place disproportionate burdens on women and children.
Source: United NationsLargest access deficitOther regions
The largest electricity access deficit remains concentrated in Sub Saharan Africa.
Energy is not simply a commodity. Reliable energy supports hospitals, refrigeration, clean water, communications, schools, agriculture, transportation, industry, employment, safety, and human dignity.
A clean energy transition that serves only wealthy markets is incomplete.
The goal must be abundant, dependable, affordable, locally appropriate, and sustainable energy for everyone.
Explore Energy Access SolutionsMission
Our mission is replacement.
We believe every major energy and industrial system should be required to answer five questions.
Replace Fuels exists to investigate those questions, publish the evidence, connect solutions with decision makers, and accelerate the replacement of systems that no longer deserve to survive.
- 01What useful work does it produce?
- 02How much valuable energy does it destroy?
- 03What materials, communities, and ecosystems carry its hidden costs?
- 04Does a better system already exist?
- 05If it does, what is preventing replacement?
How Replace Fuels works
How Replace Fuels works
- 1
Analyze
Map the complete energy and material system.
- 2
Measure
Calculate efficiency, exergy destruction, emissions, resource use, social impact, and life cycle cost.
- 3
Compare
Evaluate improvement options and complete replacement pathways.
- 4
Connect
Introduce technologies, experts, capital, governments, industries, and communities.
- 5
Replace
Support practical deployment, commercialization, retrofits, demonstration projects, and system transformation.
Technology readiness
From idea to replacement.
This is the Replace Fuels assessment framework. No scores are assigned to technologies here. Every criterion below will be evaluated with published evidence, transparent assumptions, and independent review.
Validation
- Physical validitypending
- Laboratory validationpending
- Pilot validationpending
- Commercial readinesspending
- Scalabilitypending
Economics
- Capital intensitypending
- Operating costpending
- Material availabilitypending
- Supply chain concentrationpending
Energy and Emissions
- Energy efficiencypending
- Exergy performancepending
- Carbon intensitypending
Environment
- Water requirementspending
- Land requirementspending
- Recyclabilitypending
- Durabilitypending
- Repairabilitypending
People
- Community impactpending
- Labour and human rightspending
- Energy access potentialpending
We are not short of energy.We are short of systems designed to use it well.
The world receives, stores, converts, and discards extraordinary quantities of energy every day. The challenge is not simply producing more. It is eliminating waste, selecting better materials, improving access, and directing useful energy toward the people and systems that need it most.
Collaboration
Bring us something worth replacing.
Technology Developers
Submit a process, energy system, battery chemistry, material, or storage technology.
Industrial Operators
Identify an inefficient or high impact process that requires improvement.
Researchers and Experts
Contribute analysis, evidence, technical review, and independent insight.
Investors and Governments
Find technologies and projects capable of delivering measurable system change.
The future should not run on inherited assumptions.
If an energy system wastes valuable resources, damages communities, hides its real costs, or blocks access to better alternatives, it should be challenged.