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
Explain Technical factors influencing food production? Improvement in technology has a significant impact on productivity. Improvements may occur in seed production, fertilizer

Determine the Objectives of Economic Evaluation? There are two objectives of economic evaluation. These are: 1) To introduce resource consideration into analysis and to asse

Long-term responses - Behaviour of Plants Plants alter their course of development to suit the prevailing environmental conditions. For example, leaf maturation and fall, onse

Define Factors affecting Absorption of Dietary Iron? There are mainly four factors that determine iron bioavailability absorption from the diet. These include: i) Form of ir


Starch exists in plants as insoluble starch granules in chloroplasts.  Each starch granule   holds   a   combination   of   two   polysaccharide    forms, amylopectin and amylose.

Determine the principles of Behavioural neuropsychology Behavioural neuropsychology approaches are based on the principles of learning theory and behavioural modification. Beh

Explain Diagnostic Approach to Congenital Heart Disease ? It is often easy to recognise the presence of CHD in older children and adults. As in any other form of heart disease

Plate Tectonic Is a Theory of Geology Which describes the large scale motion of earth's lithosphere. The theory builds on the older theory of continental drift from the first half

Importance Value Index (IVI) - Synthetic Characters In any study of community, the quantitative value of each of the frequency density, and cover has its own importance. But t