Question

plzzzZz give the ans​

Answer 1

Natural or primary fuels are found in nature such as wood, peat, coal, natural gas, petroleum.

• Artificial or secondary fuels are prepared from primary fuels charcoal, coal gas, coke, kerosene oil, diesel oil, petrol, etc.

Fuels are further classified as

• Solid Fuels
• Liquid Fuels
• Gaseous Fuels

Characteristics of solid fuels

• Ash is high.
• Low thermal efficiency
• Form clinker
• Low calorific value and require large excess air.
• Cost of handling high
• Cannot be used in IC engines.

Characteristics of liquid fuels

• High calorific value
• No dust ash and clinker
• Clean fuels
• Less furnace air
• Less furnace space
• Used in IC engines

Characteristics of Gaseous fuels

• Have high heat content
• No ash or smoke
• Very large storage tanks are required

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Answer 2

An ideal fuel should have the following properties:High calorific value.Moderate ignition temperature.Low moisture content.Low NOn combustible matter.Moderate velocity of combustion.Products of combustion not harmful.Low cost.Easy to transportation