Table of Contents
What is a polytropic process used for?
The term “polytropic” was originally coined to describe any reversible process on any open or closed system of gas or vapor which involves both heat and work transfer, such that a specified combination of properties were maintained constant throughout the process.
What is polytropic process example?
the case < n < ∞, in this process heat and work flows go in the same direction, This process occurs, for example, in an internal combustion engine (e.g. Otto cycle), in which there are heat loses through the cylinder walls during gas expansion (power stroke).
Is polytropic process only for ideal gases?
The specific heats will be discussed later. Notice that the results we obtained for an ideal gas undergoing a polytropic process when n = 1, is identical to that for an ideal gas undergoing the isothermal process….The Polytropic Process:
| Process | Exponent n |
|---|---|
| Adiabatic & ideal gas | k = CP/CV |
How do you know if a process is polytropic?
Polytropic Process can be defined as the process in which heat absorbed by the gas due to unit rise in temperature is constant. A polytropic process is a thermodynamic process that can be expressed using the following equation. PVn=C, It is aPolytropic process equation.
What is polytropic process Quora?
a polytropic process is a reversible process involving a gas or vapor in a closed or open system involving both heat and work transfer such that a combination of properties are maintained constant. It follows the equation PV^n= C where P is pressure, V is Volume and n the polytropic index and C is a constant.
Is a polytropic process isothermal?
Isothermal process are a subset of the polytropic. Polytropic encompass all other common processes and more. standard notation implying C is a constant, P the pressure and V the volume.
Is polytropic adiabatic?
PVn = constant Where P is the pressure, V is the volume and n is a constant. Hence, to hold PV constant in the polytropic gas expansion/compression process, both heat and work interchange takes place between the system and surrounding. Therefore, polytropic is a non-adiabatic process.
What is polytropic process isentropic?
Polytropic thermodynamic processes are ones that follow Pv^n=constant. Isentropic process is when the power n = k the gas specific heat ratio k=Cp/Cv.
Is a polytropic process isentropic?
Polytropic thermodynamic processes are ones that follow Pv^n=constant. Isentropic process is when the power n = k the gas specific heat ratio k=Cp/Cv. So I would say isentropic process is a special polytropic process (a reversible one) that doesn’t generate entropy.
Does temperature change in polytropic process?
Ans: In a polytropic process where PVn =constant, the temperature remains constant only when the polytropic index n = 1.
What is a polytropic process?
“A polytropic process is a thermodynamic process that obeys the relation: PV n = C, where where p is the pressure, V is volume, n is the polytropic index, and C is a constant. The polytropic process equation can describe multiple expansion and compression processes which include heat transfer.”
What is the difference between adiabatic and polytropic work done?
Polytropic work done is given by Adiabatic work done is given by For expansion process the Work done through reversible adiabatic process is greater than the Work done through reversible Polytropic process. 9.
What is the polytropic index of temperature?
The exponent n is known as the polytropic index and it may take on any value from 0 to ∞, depending on the particular process. the case n = 0, p= constant, corresponds to an isobaric (constant-pressure) process. the case n = 1, pV = constant, corresponds to an isothermal (constant-temperature) process.
What is the relationship between PV and temperature in polytropic process?
Ans: In a polytropic process where PV n =constant, the temperature remains constant only when the polytropic index n = 1. For n = 1: PV = C: Under the Assumption of Ideal Gas Law, The PV = C represents the Constant Temperature or Isothermal Process.