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FAQs on Available Energy, Availability and Irreversibility - Topper Handwritten Notes & Videos for GATE ME - Mechanical Engineering

1. What is the concept of available energy in thermodynamics?
Ans. Available energy in thermodynamics refers to the energy that can be converted into useful work. It is the energy that is available to do work after accounting for any losses due to irreversibilities or inefficiencies in a system. It is also known as exergy.
2. How is availability related to irreversibility in thermodynamics?
Ans. Availability and irreversibility are closely related in thermodynamics. Irreversibility represents the loss of available energy in a system due to inefficiencies or irreversible processes. Availability, on the other hand, quantifies the amount of energy that can still be converted into useful work. The higher the irreversibility, the lower the availability of energy.
3. What are the factors that affect the availability of energy in a system?
Ans. Several factors influence the availability of energy in a system. These include temperature differences, pressure differences, fluid flow rates, and the quality of the energy source. Higher temperature and pressure differences, as well as larger flow rates, generally increase the availability of energy. Additionally, the quality of the energy source, such as its chemical composition or concentration gradient, also affects availability.
4. How is the concept of availability applied in engineering and energy systems?
Ans. In engineering and energy systems, the concept of availability is used to analyze and optimize the performance of various processes. It helps in identifying the sources of energy losses and inefficiencies within a system. By maximizing the availability of energy, engineers can improve the overall efficiency and sustainability of energy conversion processes.
5. Can availability be increased or maximized in a thermodynamic system?
Ans. Availability can be increased or maximized in a thermodynamic system through various means. This can be achieved by minimizing irreversibilities, optimizing system design, and utilizing advanced technologies. By reducing energy losses and improving the efficiency of energy conversion processes, the availability of energy can be enhanced. However, it is important to note that there are always practical limitations and trade-offs involved in maximizing availability.
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