Write any four relative merits of gaseous, liquid and solid fuels
Answers
Answer:
Liquid and gaseous fuels are considered better fuels than the solid fuels because of the following reasons:
1. Liquid and gaseous fuels are easier to handle than solid fuels.
2. Liquid and gaseous fuels can be transported easily through pipelines whereas solid fuels cannot be transports in this way.
3. Liquid and gaseous fuels do not leave any residue after burning.
4. Liquid and gaseous fuels have higher calorific values than the solid fuels. In other words, for a given mass of the fuel, liquid and gaseous fuels produce more heat.
5. Liquid and gaseous fuels produce little or no smoke, whereas most of the solid fuels burn with smoke.
6. Liquid and gaseous fuels have relatively low ignition temperature and hence they burn more easily than solid fuels.
Disadvantages of Gaseous Fuels
The main disadvantages of gaseous fuels are:
1. Very large storage tanks are needed for storing gaseous fuels.
2. They are highly inflammable, so chances of fire hazards are high in their use.
3. They are more costly than solid or liquid fuels.
Answer:
The various advantages of solid fuels are given below :
Advantages
(a) They are easy to transport.
(b) They are convenient to store without any risk of spontaneous explosion.
(c) Their cost of production is low.
(d) They posses moderate ignition temperature.
Explanation:
The advantages of liquid fuels can be summarized as follows :
Advantages
(a) They posses higher calorific value per unit mass than solid fuels.
(b) They burn without dust, ash, clinkers, etc.
(c) Their firing is easier and also fire can be extinguished easily by stopping
liquid fuel supply.
(d) They are easy to transport through pipes.
(e) They can be stored indefinitely without any loss.
(f) They are clean in use and economic to handle.
(g) Loss of heat in chimney is very low due to greater cleanliness.
(h) They require less excess air for complete combustion.
(i) They require less furnace space for combustion.
The advantages of gaseous fuels are given below :
Advantages
Gaseous fuels due to erase and flexibility of their applications, possess the
following advantages over solid or liquid fuels :
(a) They can be conveyed easily through pipelines to the actual place of
need, thereby eliminating manual labour in transportation.
(b) They can be lighted at ease.
(c) They have high heat contents and hence help us in having higher
temperatures.
(d) They can be pre-heated by the heat of hot waste gases, thereby
affecting economy in heat.
(e) Their combustion can readily by controlled for change in demand like
oxidizing or reducing atmosphere, length flame, temperature, etc.
(f) They are clean in use.
(g) They do not require any special burner.
(h) They burn without any shoot, or smoke and ashes.
(i) They are free from impurities found in solid and liquid fuels.