Glossary of energy terms

86 terms.

Agrivoltaics: The dual use of land for both agriculture and solar photovoltaic energy generation, maximizing local land efficiency and preventing "solar sprawl."
Alternating Current (AC): An electric current that periodically reverses direction. It is the fundamental global standard for transmitting and distributing large amounts of electricity over power grids.
Ammonia (NH3): A chemical compound that holds massive potential as a zero-carbon marine fuel and a liquid carrier for hydrogen transport, though its extreme toxicity requires meticulous handling at ports.
Ancillary Services: Support functions that help grid operators maintain a reliable electricity system, including frequency regulation, spinning reserves, and reactive power/voltage control.
Anthracite: The highest rank of coal, characterized by a very low moisture content and a very high carbon concentration, providing the highest energy density of any raw fossil fuel.
ASEAN Power Grid (APG): A regional geopolitical initiative aimed at interconnecting the power grids of Southeast Asian nations to enhance energy security, enable cross-border electricity trade, and integrate intermittent renewable energy across different time zones.
Associated Gas: Natural gas that is found dissolved in or co-existing with crude oil in the same subterranean reservoir. It is often extracted as a byproduct of oil production.
Automatic Generation Control (AGC): A centralized computer system that sends signals to generators to adjust their output in real-time, maintaining grid frequency and power exchange with other areas.
Base Load: The minimum baseline level of demand on an electrical grid over a 24-hour period, historically supplied by continuously running coal, nuclear, or geothermal plants.
Battery Energy Storage System (BESS): A system that captures energy from renewable sources or the grid and stores it in batteries (often lithium-ion or LFP) to provide continuous power supply, peak shaving, and millisecond grid stabilization.
Battery Management System (BMS): The complex electronic control software that safeguards a battery pack, managing thermal conditions, State of Charge (SoC), and State of Health (SoH) to prevent catastrophic failures like thermal runaway.
Biochar: A carbon-rich, charcoal-like substance produced by burning organic biomass in a low-oxygen environment (pyrolysis). It is used for permanent carbon sequestration and agricultural soil enhancement.
Blue Hydrogen: Hydrogen produced from natural gas via steam methane reforming (SMR), where the resulting carbon dioxide emissions are actively captured and stored deep underground rather than released into the atmosphere.
Bunkering: The logistical industry of supplying fuels to ships. Because of its strategic location along the Malacca Strait, Singapore historically grew as the world's largest marine fossil fuel bunkering port and is now pioneering multi-fuel bunkering (LNG, methanol, ammonia).
Capacity Factor: The ratio of the actual electrical energy produced by a generating unit over a specific period compared to its theoretical absolute maximum output if it ran at full capacity 100% of the time.
Carbon Border Adjustment Mechanism (CBAM): An environmental trade policy (notably adopted by the EU) that places a carbon tariff on carbon-intensive goods imported from outside the bloc, severely impacting non-compliant global supply chains.
Carbon Capture, Utilization, and Storage (CCUS): Complex chemical and engineering technologies designed to capture CO₂ emissions directly from industrial smokestacks, subsequently reusing the carbon for industry or pumping it into deep geological formations.
Carbon Tax: A government-mandated fee imposed on the burning of carbon-based fuels, acting as a financial tool to internalize the devastating societal costs of greenhouse gas emissions.
Circular Economy: An economic paradigm aimed at eliminating waste via the continual use of resources by reusing, repairing, refurbishing, and completely recycling existing materials back into raw inputs.
Cogeneration (CHP - Combined Heat and Power): The simultaneous production of electrical and thermal energy from a single fuel source to minimize thermodynamic waste and maximize overall plant efficiency.
Combined Cycle Gas Turbine (CCGT): A highly efficient power plant architecture that utilizes both a gas turbine and a steam turbine. The intense waste heat from the gas turbine is captured to boil water, driving the secondary steam turbine to produce massive amounts of additional electricity.
Concentrating Solar Power (CSP): A utility-scale solar technology that uses fields of mirrors to concentrate intense sunlight onto a central receiver, generating extreme heat to boil water and drive a traditional steam turbine, often combined with molten salt thermal storage.
Demand Response: A smart-grid program that incentivizes large industrial or residential consumers to digitally reduce or shift their electricity usage during peak hours to prevent blackouts.
Direct Current (DC): An electric current flowing in one constant direction. Once abandoned for grid transmission, it is the native format for modern digital technology, solar panels, and batteries.
Duck Curve: A famous graph of grid power production over a single day showing the massive timing mismatch between peak human demand (evening hours) and peak renewable generation (midday sun), visually representing the critical need for grid-scale batteries.
Dunkelflaute: A German energy industry term translating to "dark doldrums," referring to a terrifying meteorological period during winter when an entire continent might experience zero wind and zero solar irradiance for weeks.
Electrolysis: The process of using electricity to forcefully split common water (H₂O) into hydrogen (H₂) and oxygen (O₂). When powered by a solar or wind farm, this creates truly zero-carbon Green Hydrogen.
Energy Market Authority (EMA): The statutory board under Singapore's Ministry of Trade and Industry functioning as the “air traffic control” for the nation, tasked with forging a progressive, liberalized energy landscape and ensuring ironclad grid reliability.
Energy Payback Time (EPBT): The time it takes for an energy generation machine (like a wind turbine) to organically generate exactly the amount of energy that human society consumed to mine, manufacture, and install it.
Energy Return on Investment (EROI): A thermodynamic ratio comparing the amount of usable energy delivered from a resource to the amount of energy physically burned to extract that resource.
FACTS (Flexible AC Transmission Systems): Electronic controllers that can rapidly adjust the impedance, voltage, and phase angle of a transmission line to increase capacity and stability.
Floating Solar PV: Solar panels mounted on highly durable pontoon structures floating on calm bodies of water, maximizing space utilization and naturally cooling the panels to boost yield—prominently utilized in Singapore's Tengeh Reservoir.
Four Switches: Singapore’s official national strategy to fundamentally rewire its energy supply, consisting of: 1) Natural Gas reliability, 2) Solar expansion, 3) Regional Power Grid imports, and 4) Low-Carbon Alternatives (hydrogen/CCUS).
Frequency Regulation: The invisible, millisecond-by-millisecond balancing act of matching electricity supply to human demand to maintain the grid's precise operating rhythm (50Hz or 60Hz).
Geomagnetically Induced Currents (GIC): Rogue, destructive electrical currents induced directly onto the transmission grid by extreme solar storms, capable of physically melting high-voltage transformers.
Geothermal Energy: Raw heat derived from the Earth's magma and tectonic sub-surface, harvested for localized heating or continuous, weather-independent baseload electricity generation.
Green Hydrogen: Standard hydrogen (H₂) produced via the water electrolysis process driven 100% by renewable electricity, featuring a truly decarbonized production lifecycle.
Grey Hydrogen: Hydrogen derived strictly from natural gas via steam reforming, where massive volumes of carbon dioxide are vented directly into the atmosphere. It remains the cheapest and most polluting form of hydrogen today.
Harmonics: Waveform distortions at multiples of the fundamental frequency (50/60Hz) caused by non-linear loads, potentially causing equipment damage.
Heat Engine: Any thermal machine (like a gas turbine or internal combustion engine) that converts burning heat into mechanical motion, bounded absolutely by the physical laws of thermodynamics and the Carnot limit.
High Voltage Direct Current (HVDC): A power transmission technology remarkably efficient for moving colossal amounts of electricity over continents or beneath oceans, primarily used for cross-border cables and offshore wind farms.
Hydraulic Fracturing (Fracking): The highly controversial engineering technique used to aggressively extract trapped oil and natural gas from dense subterranean shale rock by horizontally injecting high-pressure chemical fluid mixtures.
Intermittency: The fundamental curse of renewable energy—the physical inability of solar and wind farms to generate continuous power on-demand regardless of weather or time of day.
Inverter: The crucial “translator” of the power grid, a machine that converts DC power generated by solar panels or batteries into the AC power compatible with the wider electrical grid and home appliances.
Islanding: A safety dynamic where a localized microgrid (or a simple rooftop solar array) continues to power a neighborhood even though the broader national transmission grid has failed.
Jurong Island: The colossal artificial island functioning as the industrial heart of Singapore’s energy, chemicals, and refining ecosystem, currently undergoing a multi-billion dollar pivot toward low-carbon and zero-waste manufacturing.
Levelized Cost of Energy (LCOE): The industry's standard financial yardstick, calculating the average total cost of building, maintaining, and operating a power plant across a 30-year lifespan, divided by the total megawatt-hours it produces.
Liquefied Natural Gas (LNG): Natural gas (methane) cryogenically frozen to a brutal -162°C, transforming it into a liquid and shrinking its volume by a factor of 600 to allow transport via massive ocean tankers rather than terrestrial pipelines.
Liquid Organic Hydrogen Carrier (LOHC): Specially engineered chemical compounds acting like "hydrogen sponges," allowing flammable hydrogen to be safely absorbed and transported as a stable oil at room temperature.
Lithium Iron Phosphate (LFP): A specific formula of lithium-ion battery renowned for its extreme thermal stability, lack of expensive cobalt, and immense cycle life, rapidly becoming the gold standard for massive grid-level energy storage.
Locational Marginal Pricing (LMP): A market-clearing price for electricity at a specific location on the grid, reflecting the cost of energy plus the cost of congestion and losses.
Microgrid: A localized, highly intelligent grouping of power sources, batteries, and loads that usually operates connected to the main grid, but can selectively "sever" itself to run autonomously during a blackout.
N-1 Reliability: The unforgiving engineering mandate dictating that a high-voltage transmission system must continue operating flawlessly, without blacking out any customers, even if its single largest power plant or thickest cable violently fails.
Net Energy Metering (NEM): A utility billing mechanism that allows home owners with solar panels to sell their excess daytime electrons backward into the grid, turning the utility meter in reverse.
Ocean Thermal Energy Conversion (OTEC): A highly complex marine energy architecture that exploits the thermodynamic temperature difference between freezing deep-ocean trenches and warm tropical surface waters to generate steady, 24/7 electricity.
Peak Shaving: The corporate strategy of smoothing out a factory's expensive power consumption spikes by automatically switching to on-site battery power during the absolute busiest hours of the electrical grid.
Petrochemical Cracking: The molecular-level industrial process of shattering complex organic hydrocarbon chains from heavy crude oil into simpler, vastly more valuable molecules like naphtha or ethylene for plastics.
Phase-Shifting Transformer (PST): A specialized transformer used to control the flow of real power on a high-voltage transmission line by varying the phase angle at the ends of the line.
Phasor Measurement Units (PMUs/Synchrophasors): High-speed sensors that measure voltage and current waves on the grid with microsecond precision, allowing operators to see "invisible" oscillations.
Power Purchase Agreement (PPA): A binding, long-term financial contract (often spanning 15-20 years) between an electricity generator and a corporate consumer, fixing the total price of power to guarantee the bankability of billion-dollar renewable projects.
Proton Exchange Membrane Fuel Cell (PEMFC): A low-temperature hydrogen fuel cell that can instantly adjust its electrical output, dominating the automotive world for heavy logistics and hydrogen trucking.
Pumped Hydroelectric Storage (PHS): A massive terraforming mechanism that stores kinetic energy by pumping billions of gallons of water up a mountain during cheap off-peak hours, releasing it downhill through heavy turbines when electricity is scarce.
Reactive Power (VARs): The non-working part of the current that alternating current systems must carry to maintain magnetic fields in motors and transformers.
Redox Flow Battery (RFB): A battery chemistry where energy is stored externally in towering tanks of liquid electrolytes (often Vanadium) that are pumped over a central membrane, theoretically offering infinite cycle life for multi-day energy storage.
Repowering: The economic lifecycle practice of tearing down 20-year-old wind turbines or solar farms and replacing them with vastly more powerful modern equivalents on the exact same plot of highly valuable, grid-connected land.
SAIDI (System Average Interruption Duration Index): A standard metric for the average total duration of power outages per customer per year.
SCADA (Supervisory Control and Data Acquisition): The overarching, hyper-secure telemetry network used by national grid operators in heavily guarded control rooms to monitor, switch, and route industrial infrastructure across a continent in real time.
SF6 (Sulfur Hexafluoride): A potent greenhouse gas used as an electrical insulator in high-voltage circuit breakers and switchgear due to its superior dielectric properties.
Small Modular Reactor (SMR): The attempted rebirth of the nuclear industry. These advanced miniaturized reactors (under 300 MW) are designed to be mass-produced in factories for cheaper transport and theoretically foolproof passive safety physics.
SolarNova Programme: The whole-of-government initiative spearheaded by Singapore's HDB and EDB to aggressively blanket the rooftops of hundreds of public housing blocks in standardized solar photovoltaics, turning residential estates into virtual power plants.
Solid Electrolyte Interphase (SEI): A microscopic, brittle layer that inevitably forms on the carbon anode of a lithium-ion battery during its first use. While it prevents immediate explosion, its gradual thickening is the primary physics reason why phone and EV batteries slowly degrade.
Solid Oxide Fuel Cell (SOFC): A heavy-duty, ultra-high-temperature fuel cell that uses solid ceramics instead of liquid acids. They can internally process natural gas or ammonia to provide incredibly efficient baseload electricity for large buildings.
Spinning Reserve: Power plants that are already fired up, synchronized to the 50Hz heartbeat of the grid, and spinning at below maximum capacity—ready to inject emergency power within seconds to halt a blackout cascade.
State of Charge (SoC): The equivalent of an industrial "fuel gauge" for a battery pack, representing its exact real-time energy reserve as a percentage.
Sustainable Aviation Fuel (SAF): A cleanly synthesized alternative jet fuel, chemically identical to fossil kerosene but manufactured from waste cooking oils or agricultural matter, allowing jets to decarbonize without changing their engines.
Tar Sands: Extremely nasty geological formations of sand, clay, water, and ultra-viscous bitumen. Extracting usable oil from this muck requires apocalyptic amounts of heat and fresh water, representing the absolute bottom of the EROI barrel.
Thermal Runaway: The nightmare scenario for grid batteries. It is an uncontainable, accelerating chemical chain reaction within a failing lithium cell that geometrically releases immense heat and toxic gas, ending in an unstoppable fire.
Time-of-Use (TOU) Pricing: A dynamic electricity tariff structure where electrons are dirt-cheap during the midday "solar glut" and insanely expensive during evening hours, financially weaponizing consumer behavior to balance the grid.
Tidal Stream Turbine: A monumental underwater turbine anchored to the dark, turbulent seabed of a strait or estuary, harnessing the sheer gravitational kinetic force of the moon pulling the ocean's tides.
Tuas Nexus: Singapore's futuristic masterplan integrating a mega wastewater plant with an incineration plant on the same plot of land. It leverages profound thermal synergies (using waste steam to boil water, using waste sludge to generate biogas) to achieve industrial circularity.
Turquoise Hydrogen: A promising, experimental technique that subjects natural gas to extreme pyrolysis. Instead of emitting gaseous CO₂, it produces hydrogen and solid chunks of carbon black, simplifying the emissions problem into a transportable solid.
Uranium-235: The highly unstable, fissile isotope of raw uranium. It is the miraculous element capable of safely sustaining a controlled nuclear chain reaction within the high-pressure heart of a commercial power plant.
Vehicle-to-Grid (V2G): The revolutionary concept of treating millions of idle electric vehicles as a massive, distributed mega-battery. When the grid is strained, an AI seamlessly pulls a few kilowatt-hours from millions of parked cars to prevent a blackout.
Virtual Power Plant (VPP): A highly advanced cloud architecture that financially and digitally aggregates thousands of isolated residential solar roofs, home batteries, and smart thermostats to perform exactly like a single, multi-megawatt gas plant on the open energy market.
Voltage Support: The critical injection of unseen "reactive power" into transmission lines by massive capacitors or synchronous condensers. This maintains the essential electromagnetic 'pressure' required to push real power across hundreds of miles of wire.
Waste-to-Energy (WTE): The hyper-efficient incineration of municipal garbage at over 1000°C. Popularized in space-constrained cities like Tokyo and Singapore, it destroys the physical volume of landfill trash while extracting the caloric heat value to spin a steam turbine.