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scott_for_the_game
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Why is it when the conditions are adiabatic and reversible about a turbine, the assumption is its isentropic?
If dQ = 0, then dS = dQ/T = 0.scott_for_the_game said:Why is it when the conditions are adiabatic and reversible about a turbine, the assumption is its isentropic?
I am not assuming that dS = dQ/T. That is the thermodynamic definition of dS.sicjeff said:you are missing a few terms in your entropy equation. You can't simply assume that dS=dQ/T.
Wikipedia said:"[URL
Quantitatively, entropy, symbolized by S, is defined by the differential quantity dS = δQ / T, where δQ is the amount of heat absorbed in a reversible process in which the system goes from one state to another, and T is the absolute temperature.[3][/URL]
Adiabatic conditions refer to a thermodynamic process in which there is no transfer of heat between the system and its surroundings. This means that the system is thermally isolated and there is no heat exchange.
In a turbine, the adiabatic condition means that there is no heat exchange between the gas or fluid passing through the turbine and the environment. This allows the turbine to convert the fluid's kinetic energy into mechanical energy with maximum efficiency.
A reversible process in a turbine means that the process can be reversed without any loss of energy. This is important because it allows for the maximum amount of work to be extracted from the system, resulting in a more efficient process.
Adiabatic and reversible conditions can be achieved in a turbine by insulating the system to prevent heat transfer and by minimizing friction and other losses in the turbine's components. This ensures that the process is as close to an ideal, theoretical process as possible.
No, it is not always possible to achieve adiabatic and reversible conditions in a turbine. Real-world factors such as friction, heat transfer, and non-ideal components prevent an ideal, theoretical process from occurring. However, engineers strive to design turbines that come as close to these conditions as possible in order to maximize efficiency.