physics. :
that part of the energy of bodies or systems which exists under such conditions that work may be theoretically derived from it
— compare degradation of energy, entropy, unavailable energy.
What is available energy AE?
Introduction:
The maximum work output obtainable from a certain heat input in a
cyclic heat engine is called the available energy. Available Energy: The maximum work output obtainable from a certain heat input in a cyclic heat engine is called the available energy (A.E.), or the available part of the energy supplied.
The
area 1-2-3-4
represents the available energy. The shaded area 4-3-B-A represents the energy, which is discarded to the ambient atmosphere, and this quantity of energy cannot be converted into work and is called Unavailable energy.
What is meant by available energy in thermodynamics?
In thermodynamics, available energy is
the greatest amount of mechanical work that can be obtained from a system or body
, with a given quantity of substance, in a given initial state, without increasing its total volume or allowing heat to pass to or from external bodies, except such as at the close of the processes …
:
energy that is incapable of doing work under existing conditions
— compare available energy, degradation of energy, entropy.
Derivations of the statement “the internal energy that becomes unavailable to do work during a process is
equal to the product of the increase in entropy during such a process and the temperature of the coldest available thermal reservoir
” have appeared in the literature under several guises.
Is the power available to do useful work?
In the context we have just described,
free energy
is energy that is available to do useful work, not energy that we can get for nothing. When a spontaneous process occurs and there is a free energy decrease, it is the availability of useful energy which decreases.
Which of the following is an example of high grade energy?
Electrical and chemical energy
are high-grade energy, because the energy is concentrated in a small space. Even a small amount of electrical and chemical energy can do a great amount of work.
What is available energy UE?
physics. :
that part of the energy of bodies or systems which exists under such conditions that work may be theoretically derived from it
— compare degradation of energy, entropy, unavailable energy.
What is the available energy referred to a cycle also explain DEAD state?
Dead state implies the temperature and pressure existing in the surroundings and are designated by T
0
and P
0
. Availability or Energy is the maximum portion of energy that can be converted into work by ideal process that reduces the system to dead state.
What is the available energy in a system called?
When the surroundings are the reservoir,
exergy
is the potential of a system to cause a change as it achieves equilibrium with its environment. Exergy is the energy that is available to be used. After the system and surroundings reach equilibrium, the exergy is zero.
What is the maximum efficiency?
The Maximum Efficiency Rate is
the well production rate that determines the maximum volumetric recovery of reservoirs with minimum residual oil saturation at the depletion
. It is commonly used to denote the rate of field production that can achieve the maximum financial return from the reservoir operation.
What is spontaneous change?
In chemistry, spontaneous change is
change which occurs by itself, without outside assistance
.
Does entropy change when work is done?
Entropy is
the loss of energy available to do work
. Another form of the second law of thermodynamics states that the total entropy of a system either increases or remains constant; it never decreases.
What happens unusable energy?
Energy cannot be created or destroyed, but it can change from more-useful forms into less-useful forms. … In most cases, this unusable energy takes
the form of heat
. Although heat can in fact do work under the right circumstances, it can never be turned into other (work-performing) types of energy with 100% efficiency.
Is entropy unusable energy?
Entropy is a measure of the randomness or disorder within a closed or isolated system, and the Second Law of Thermodynamics states that as usable energy is lost, chaos increases – and that progression towards
disorder can never be reversed
.
