Availability of a system at any given state isa)a property of the syst...
The Availability of a given system is defined as the maximum useful work (total work minus Pdv work) that is obtainable in a process in which the system comes to equilibrium with its surroundings.
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Availability of a system at any given state isa)a property of the syst...
Availability of a system at any given state:
The availability of a system at any given state refers to the maximum useful work that can be obtained from the system as it goes to a dead state. It is a measure of the energy that can be harnessed from a system to perform useful work.
Explanation:
The availability of a system is not a property of the system itself, but rather a measure of the potential work that can be extracted from the system. It is based on the concept of exergy, which is the maximum useful work that can be obtained from a system as it goes to equilibrium with its surroundings.
Key Points:
- Availability is the maximum useful work that can be obtained from a system.
- Availability is not a property of the system itself.
- Availability is based on the concept of exergy.
- Exergy is the maximum useful work that can be obtained as a system goes to equilibrium with its surroundings.
- Exergy is a measure of the quality of energy in a system.
- The availability of a system depends on its state and the state of its surroundings.
- The availability of a system is always less than or equal to the total energy of the system.
- The availability of a system can be increased by increasing the temperature difference between the system and its surroundings.
- The availability of a system can be decreased by irreversibilities such as friction, heat transfer across a finite temperature difference, and mixing of different substances.
Conclusion:
In conclusion, the availability of a system at any given state is the maximum useful work that can be obtained from the system as it goes to a dead state. It is not a property of the system itself, but rather a measure of the potential work that can be extracted from the system. The availability of a system is based on the concept of exergy, which is the maximum useful work that can be obtained as the system goes to equilibrium with its surroundings.