What is engine dissociation?

What is engine dissociation?

Dissociation process can be considered as the disintegration of combustion produce at high temperature. During dissociation the heat is absorbed whereas during combustion the heat is liberated. In IC engines, mainly dissociation of CO2 into CO and O2 occurs, whereas there is very little dissociation of H2O.

What is effect of dissociation?

Dissociation is a break in how your mind handles information. You may feel disconnected from your thoughts, feelings, memories, and surroundings. It can affect your sense of identity and your perception of time. The symptoms often go away on their own. It may take hours, days, or weeks.

What is dissociation effect in IC engine?

Dissociation is a process of disintegration of combustion products at high temperature. This can also be considered as reverse process to combustion. During dissociation , heat is absorbed where as during combustion heat is released.

What is the effect of dissociation on flame temperature?

The hotter the flame, the greater the amount of dissociation, forming increasing amounts of unburned combustion products and a greater drag on flame temperature. For our natural gas, the flame temperature will be about 3,450°F (1,899°C) after dissociation does its dirty work.

What is dissociation effect and how does it affect the power generation in a 4 stroke SI engine *?

Dissociation is the reverse process to combustion. Means the disintegration of the combustion products at high temperature. During dissociation , heat is absorbed ( Endothermic reaction) ,whereas during combustion heat is liberated (Exothermic reaction) . Dissociation increases with temperature.

What is dissociation explain the effect of dissociation on Otto cycle?

Comparing with ideal expansion 3-4 it can be observed that effect of dissociation is to lower temperature and consequently pressure at beginning of expansion stroke. Thus leading to loss of efficiency and power.

What is flame and explosion temperature?

When a combustion reaction takes place energy is released to the combustion products. If no heat is lost in this process, the temperature of the combustion products is known as the “Adiabatic Flame Temperature.” For hydrogen burning in air at 1 atmosphere the Adiabatic Flame temperature is 2,400 K or 2127 C.

What affects flame temperature?

Flames can vary in temperature from about 600°C to more than 3000°C. One factor is the energy released from the fuel’s combustion. Acetylene, for example, burns very hot because of the triple bond between the carbon atoms in it.

What do you mean by dissociation?

dissociation, in chemistry, the breaking up of a compound into simpler constituents that are usually capable of recombining under other conditions.

What is dissociation in thermodynamics?

Thermal dissociation is conventionally understood to be a breakdown of chemical bonds in molecules resulting in production of smaller molecules or atoms under the influence of temperature. The weaker the chemical bond in a molecule, the lower is the temperature at which thermal dissociation occurs.