Glossary Of Energy Terms - R

A collection of energy related terms with their meanings, starting with the letter R. Click on any word to read its meaning.

R-value

Rack sales

RAD

Radiant barrier

Radiant ceiling panels

RADIANT ENERGY

RADIATION

Radiative forcing

Radiatively active gases

Radiator

Radioactive waste

Radioactivity

Radioisotope

Radon

Rail (method of transportation to consumers)

Railroad and railway electric service

Railroad locomotive

Railroad use

Range top

RANKINE CYCLE

Rankine cycle engine

Rapeseed

Rate base

Rate case

Rate features

Rate of return

Rate of return on rate base

Rate schedule (electric)

RATE-BASING

Ratemaking authority

Rates

Rating

Ratio estimate

Ratoon crop

RAW FUEL

Rayleigh frequency distribution

RDF (REFUSE DERIVED FUEL)

Reactance

Reactive power

REACTOR

Real dollars

Real Power

Real price

REAL-TIME MARKET

REAL-TIME PRICING

Reasonably assured resources (RAR)

Rebate program

Reburn

Receipts

Receivables from municipality

Received

RECLAIMED OIL

Reclamation

Reclamation expenses

RECOOL

Recoverability

Recoverable coal

Recoverable proved reserves

Recoverable reserves

Recoverable reserves, estimated recoverable reserves (coal)

RECOVERED ENERGY

RECOVERY EFFICIENCY

Recovery factor (coal)

Recovery percentage (coal)

RECS

Rectifier

Recycled feeds

Recycling

Redox potential

Redrill footage

Reduced use-off hours

Reference month

Reference year

Refined petroleum products

Refiner

Refiner acquisition cost of crude oil

REFINERY

Refinery capacity utilization

Refinery fuel

Refinery gas

Refinery input, crude oil

Refinery input, total

Refinery losses and gains

Refinery output

Refinery production

Refinery utilization rate

Refinery yield

Reflective film

Reflectivity

Reforestation

Reformulated gasoline

REFORMULATED GASOLINE (RFG)

REFRIGERANT

Refrigeration unit

Refunding

Refuse bank

Refuse mine

Refuse recovery

Refuse-derived fuel (RDF)

Regional reserves, regional reserve estimates (coal)

Regional Transmission Group

Regular grade gasoline

Regulated entity

Regulated streamflow

REGULATION

Regulation, procedures, and practices

REGULATORY MUST-RUN GENERATION

REGULATORY MUST-TAKE GENERATION

REHEAT

Reheating coils

Reid Vapor Pressure (RVP)

Reinjected

Reinserted fuel

Reinsertion

RELIABILITY

Reliability (electric system)

RELIABILITY MUST RUN UNIT

RELIABILITY MUST-RUN GENERATION

Relocation of tailings

Remaining (resources/reserves) (coal)

RENEWABLE ENERGY

Renewable energy resources

RENEWABLE RESOURCES

Replacement energy source for primary heating

Replacement vehicle

Report State

Report week

Report year (calendar)

Report year (fiscal)

Reporting

Repowering

Repressuring

Reprocessing

Requirements power

REREGULATION

Resale (wholesale) sales

Research and development (R&D)

Reseller

Reserve

Reserve additions

Reserve cost categories of $15, $30, $50, and $100 per pound U3O8

RESERVE GENERATING CAPACITY

RESERVE MARGIN

Reserve margin (operating)

Reserve revisions

Reserves changes

Reserves, coal

Reserves, energy

Reserves, net

Reservoir

Reservoir capacity

Reservoir repressuring

RESIDENTIAL BUILDING

Residential consumers

Residential energy consumption survey (RECS)

Residential heating oil price

Residential propane price

Residential sector

Residential type central air conditioner

Residential vehicles

Residential/commercial (consumer category)

Residual fuel oil

RESIDUE

Residue gas

Residues - Biomass

Residuum

RESISTANCE (ELECTRICAL)

RESISTANCE (THERMAL)

RESOURCE EFFICIENCY

Resources (Coal)

Respondent

Restoration time

Restricted-universe census

Restructuring

RETAIL COMPETITION

RETAIL MARKET

Retail motor gasoline prices

Retail wheeling

Retailer

Retained earnings

Retire from service

Retired hydropower plant sites

RETORTING

RETROFIT

Return on common equity

Return on common stock equity

Revenue - (electricity)

Revenue requirement

Reversible turbine

Revisions and additions (gross change in reserves)

Ribbon silicon

Right-of-way

Rip rap

River (method of transportation to consumers - coal)

Road oil

Rodlet or GAD basket

Roll front

Roof (coal)

Roof insulation

Roof or ceiling insulation

Roof or ceiling insulation, insulation in exterior walls

Roof pond

Roof support and mine ventilation

Room air conditioner

Room heater burning gas, oil, and kerosene

Room-and-pillar mining

Rotary rig

Round test mesh

Roundwood

Royalty

Royalty cost

Royalty interest

Royalty interest (including overriding royalty)

RTFO

RTG

Rulemaking (regulations)

RULES OF CONDUCT

Run off

Run-of-mine coal

Run-of-river hydroelectric plant

Running and quick-start capability

Rural Electrification Administration (REA)

Click on any of the letters below to navigate to the terms that start with that letter.

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