mathematics

Renewable Identification Number

Renewable Identification Number is a mathematics topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Renewable Identification Number rather than just read about it. In short: A Renewable Identification Number (or RIN) is a serial number assigned to a batch of biofuel for the purpose of tracking its production, use, and trading as required by the United States Environmental Protection Agency's Renewable Fuel Standard (RFS) implemented according to the Energy Policy Act of 2005 and the Energy Independence and Security Act of 2007. RIN components As defined in the regulation: Under RFS2, ea…

Key takeaways

Renewable Identification Number belongs to mathematics; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Renewable Identification Number to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Renewable Identification Number from memory before moving on to harder problems.

Reference excerpt

A Renewable Identification Number (or RIN) is a serial number assigned to a batch of biofuel for the purpose of tracking its production, use, and trading as required by the United States Environmental Protection Agency's Renewable Fuel Standard (RFS) implemented according to the Energy Policy Act of 2005 and the Energy Independence and Security Act of 2007.

RIN components As defined in the regulation: Under RFS2, each batch-RIN generated will continue to uniquely identify not only a specific batch of renewable fuel, but also every gallon-RIN assigned to that batch. Thus the RIN will continue to be defined as follows: RIN: KYYYYCCCCFFFFFBBBBBRRDSSSSSSSSEEEEEEEE Where:

K = Code distinguishing assigned RINs from separated RINs YYYY = Calendar year of production or import CCCC = Company ID FFFFF = Facility ID BBBBB = Batch number RR = Code identifying the Equivalence Value D = Code identifying the renewable fuel category SSSSSSSS = Start of RIN block EEEEEEEE = End of RIN block

Authorizing legislation Under the Energy Policy Act of 2005, the EPA is authorized to set annual quotas dictating what percentage of the total amount of motor fuels consumed in the US must be represented by biofuel blended into fossil fuels. Companies that refine, import or blend fossil fuels are obligated to meet certain individual RFS quotas based on the volume of fuel they introduce into the market. By fulfilling these requirements, the EPA projects that the industry will collectively satisfy the overall national quota they set. To ensure compliance, obligated parties are periodically required to demonstrate they have met their RFS quota by submitting a certain amount of RINs to the EPA. Because each of these RINs represent an amount of biofuel that has been blended into fossil fuels, the RINs submitted to the EPA by obligated parties are a quantitative representation of the amount of biofuel that has been blended into the fossil fuels used in America.

Registration and trading Anyone who owns RINs must register with the EPA on an annual basis and obey mandated record-keeping requirements. RINs are only granted if the registered fuel was made in accordance with EISA rules. These regulations are enforced against both domestic and foreign producers. All RINs are reported to the EPA after creation.

Fraud Renewable Identification Numbers can be sold and traded separately from the biofuels that created them. This has given rise to instances of "RIN fraud", where improperly created RINs have been sold without any manufacture of corresponding biofuels.

References

Further reading Analysis of Renewable Identification Numbers (RINs) in the Renewable Fuel Standard (RFS) Congressional Research Service Tracking and Trading the Renewable Identification Number Archived 2016-03-05 at the Wayback Machine EPA OTAQ RFS page[link removed] FAPRI-MU website for RIN price projections and related analysis

Worked examples

Example 1 — a first encounter with Renewable Identification Number

Start with the simplest possible case. Write down what Renewable Identification Number claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In mathematics, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Renewable Identification Number before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Renewable Identification Number ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Renewable Identification Number

In research: Renewable Identification Number appears in mathematics research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Renewable Identification Number in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Renewable Identification Number is common in secondary-school and first-year university syllabi. It links to neighbouring topics Biofuels, Climate change in the United States, Renewable energy certification, so understanding it makes those chapters shorter.
In everyday life: Look for Renewable Identification Number outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Renewable Identification Number in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Renewable Identification Number means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Renewable Identification Number out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Renewable Identification Number in simple terms?

Why does Renewable Identification Number matter?

Because it connects several mathematics ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Renewable Identification Number?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Renewable Identification Number.