Grid Emissionality 2D: The REC Accounting Gap |…

What Grid Emissionality Is

Grid emissionality refers to the process by which power grids determine the sources of electricity that will meet current demand. This is often visualized through a merit-order dispatch, where plants are ranked based on their marginal cost and dispatched from least costly to most expensive until demand is met.

In this simulation, you can observe how different factors like grid demand, wind availability, and REC purchases affect the dispatch of power sources, highlighting the gap between perceived environmental benefits and actual emissions reductions.

Why It Matters

Understanding grid emissionality is crucial for policymakers, energy companies, and consumers to make informed decisions about renewable energy investments. The simulation demonstrates that while buying RECs can be a marketing tool, it often does not lead to significant reductions in actual emissions.

This knowledge helps in designing more effective policies and strategies to reduce greenhouse gas emissions and promote sustainable energy practices.

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How the Simulation Works

The simulation uses a 2D grid-dispatch model where you can manipulate variables such as grid demand, wind availability, and REC purchase volume. These inputs affect which power plants are dispatched to meet the current load, with each plant having different emissions characteristics.

By interacting with the rotatable plant ring and the merit-order dispatch ladder, you can see how these factors influence the overall marginal emissions of the grid.

Real-World Applications

In real-world scenarios, grid operators must balance cost efficiency with environmental impact. The simulation provides insights into why some renewable energy policies may not have the desired effect on reducing carbon footprints.

This understanding can help in developing more targeted and effective strategies for transitioning to a low-carbon economy.

Frequently asked questions

What are Renewable Energy Certificates (RECs)?

Renewable Energy Certificates represent the environmental attributes of electricity generated from renewable sources. They can be bought and sold separately from the physical electricity, allowing consumers to claim they are using green energy even if it comes from non-renewable sources.

How do RECs affect actual emissions?

While purchasing RECs indicates a commitment to renewable energy, their impact on reducing actual emissions is limited. The simulation shows that buying RECs does not necessarily change the dispatch of power plants and thus may not lead to significant reductions in overall grid emissions.

Why do we need grid emissionality simulations?

These simulations help us understand the complexities of energy markets and the limitations of certain policies. They provide a practical way to visualize how different factors interact, which is crucial for developing effective strategies to combat climate change.

Can buying RECs ever lead to real emissions reductions?

In some cases, buying RECs can indirectly support the growth of renewable energy by increasing market demand. However, the simulation demonstrates that direct dispatch changes are minimal, and actual emissions reductions require more targeted interventions such as investing in renewable infrastructure.

Try it live

Everything above runs in your browser — open Grid Emissionality 2D: The REC Accounting Gap | mysimulator.uk and change the parameters while it is running. Nothing is installed, nothing is uploaded, the whole model lives in one tab.

▶ Open Grid Emissionality 2D: The REC Accounting Gap | mysimulator.uk simulation