Characteristics of a good fuel, Biology

(1)   It should have high "calorific value" or heat content.

(2)   It should have "moderate ignition temperature". (lgnition temperature is the minimum temperature at which it stars burning). The fuel having low ignition temperature catches fire easily and it is difficult to store or transport. High ignition temperature causes difficulties in combustion of fuel i.e. large amount of heat energy is requires.

(3)   It should have "low moisture content" since it reduce the heat value.                                         

(note : it takes away appreciable amount of the liberated heat in the form of latent heat of vaporization. It increases the transport costs. Surface moisture causes difficulty in handling of solid fuel. Anyway, presence of 5-10% moisture is desirables as it produces a uniform fuel bed and less fly ash).

(4)   It should have 'low ash or non combustible matter'.                                                                     

(Note: high percentage of ash is undesirable as it does not contribute to the calorific value Ash i.e., Non-combustible matter causes reduction in heat value, increase the cost of storage and disposal, increase the cost of fuel and also causes environmental problems. In furnace grate, the ash may restrict the passage of air and lower the rate of combustion.

(5)   It should have "harmless products on combustion". (I.e. it should not liberate harmful gases like SO2, CO, H2S, PH3 etc.)        

(6)   It should have "moderate velocity of combustion".                                                                       

(Note: if velocity of combustion is slow, high temperature required cannot be attained. If velocity of combustion is high, major part of energy will be radiated to atmosphere.)

(7)   Fuel should be readily available at low cost.

(8)   Storage cost should be low.

(9)   Size of fuel should be uniform in case of a solid fuel.

(10)  Storage and transportation should be easy.

(11)  It should not burn with long smoky flame and combustion should be controlled.            

Posted Date: 7/12/2012 4:15:26 AM | Location : United States







Related Discussions:- Characteristics of a good fuel, Assignment Help, Ask Question on Characteristics of a good fuel, Get Answer, Expert's Help, Characteristics of a good fuel Discussions

Write discussion on Characteristics of a good fuel
Your posts are moderated
Related Questions
What does boiling do to an enzyme? Enzymes are denatured (their shape is changed so it doesn't work) when boiled.

Stems transport liquids (a)  Cut about 2 cm from the end of stems of celery and place them in cold water for about an hour to freshen. Next place the stems in dishes having red

What is the difference between recessive allele and dominant allele? The Dominant allele is the allele that determines phenotypical features that manifest in heterozygous or ho

Give an example of how the public perception of science has been distorted or manipulated to serve an alternative purpose.

Physical Concepts of Plant Water Relation - Diffusion Diffusion is a spontaneous process that leads to net movement of a substance from a region of higher concentration to a r

Synergistic and Sequential Effects of Hormones In vitro studies on callus and suspension cultures have brought out two interesting findings. The nature and direction of differ


Explain the Diarrhoeal Management Strategies? The diarrhoeal management strategies have had a major impact on less than 5 mortality rate. The distribution of ORS packets and ne

Elaborate the following term in detail - Macronucleus. One of two types of dimorphic nuclei found in ciliate protozoans. Macronucleus contains multiple copies of genome (polypl

What are some diseases or genetic abnormalities caused by dominant genes? Why are severe dominant genetic diseases rarer than recessive ones? Instance of dominant genetic disea