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
QUESTION Behaviourists underestimate the importance of biological factors such as the inherited factors, by emphasizing the simple approach of Stimulus-Response to explain beha

Explain Understanding the response of farmers? Understanding the response of the farmers by the government also influences the food production. Government policy influences the

Syphilis and HIV Most clinicians treat HIV-infected patients with syphilis and normal CSF with standard penicillin doses for the stage of syphilis, but some patients may need

Aldosterone mediates myocardial remodeling and fibrosis, as well as sodium retention and potassium loss at the distal tubules. The anti-aldosterone agent, spironolactone   has been

Vegetative Development - Development The process of growth and differentiation of cells into organs and organisms is often termed development. For example, the development of

Q. Explain the Functions of Consciousness? Consciousness allows individuals to be aware of his/her surrounding, thereby defining the context and removing ambiguities. Simplific

Coiling of garden pea tendrils around any support is an example of: 1. Thigmotaxis 2. Thigmonasty 3. Thigmotropism 4. Thermotaxis Thigmotropism

Class of Subphylum Uniramia - Chilopoda Chilopoda have the centipedes. The class contains some 2500 species that have been described so far. They inhabit both of the tropical

Explain herbicide tolerant  crops Candidates who reached the scholarship standard demonstrated a wide general knowledge of the living  world to which they could relate biologi

Which of the following serves as an actuating signal, or as part of an actuating signal, in a negative feedback system? A. Action potentials in sympathetic neurons that release