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Examoogle • User • info@examoogle.com • EE-2024-8821
Chapter 1 of 12 • Page 1 of 248🔒 Protected PDF • Watermarked
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The commercial sources of energy are
Solar, wind and biomass
Fossil fuels, hydropower and nuclear energy
Wood, animal wastes and agriculture wastes
None of the above
Fossil fuels, hydropower and nuclear energy
Commercial sources of energy are those which are available in the market for a definite price and are traded as commodities. These sources, including fossil fuels, hydropower, and nuclear energy, are centralized and used for large-scale industrial and power generation applications.
Commercial sources of energy are those which are available in the market for a definite price and are traded as commodities. These sources, including fossil fuels, hydropower, and nuclear energy, are centralized and used for large-scale industrial and power generation applications.
Etotal=∫P(t)dt — represents total energy consumed over time t, used for billing.
η=PinPout — represents the thermal efficiency of conversion for commercial power plants.
These sources typically involve the conversion of primary energy (thermal, kinetic, or nuclear potential) into electrical energy via turbines and alternators. The process involves centralized extraction, processing, and transmission through a power grid to reach consumers who pay for the service based on consumption rates.
Commercial energy is bought and sold in the open market.
Non-commercial sources (wood, cow dung) are gathered directly by users and typically have no price tag.
Fossil fuels (Coal, Oil, Natural Gas) dominate the global commercial energy mix.
Nuclear and Hydroelectric are classified as commercial due to their requirement for large-scale infrastructure and centralized distribution.
High reliability and continuous supply.
Easier to regulate and distribute via national grids.
Requires significant capital investment.
Often associated with environmental externalities and pollution.
Industrial manufacturing and processing.
Large-scale lighting and infrastructure operations.
Commercial sources are distinct from 'Traditional' or 'Non-commercial' sources which are often collected for free in rural settings.
Option A refers to Renewable energy sources (which can be commercial or non-commercial). Option C refers to Biomass/Traditional fuels which are generally non-commercial.
B is correct — Fossil fuels, hydropower, and nuclear energy represent centralized sources traded for a price, defining them as commercial energy.
Remember that 'Commercial' implies a market price and grid dependency, whereas 'Non-commercial' usually refers to bio-based fuels gathered manually for subsistence.