As we have recently explained in a computational review on molecular dynamics [30], an isothermal process cannot be obtained by adding an extra term to the Lagrangian.
It can be observed that estimated mean value of end-to-end efficiency increases from 24% to 72% with a decrease in the polytropic index of compression from 1.4 (adiabatic process) to 1 (isothermal process).This clearly indicates liquid piston compression and expansion efficiency has a major influence on the end-to-end efficiency.
Since minimum wetting flow rate was approximately 0,02 l/m x min, (wetted perimeter equals to the plate width), temperature of the film decreases and process parameters became like in the isothermal process. This was recorded for every tested temperature.
Stirling cycle is defined as a ideal reversible thermodynamic cycle with two isothermal process with compression and expansion and two constant volume process with heating and cooling [4].
To analyze the practical realization of the isothermal process, Option C.3 uses many small compression steps with inter-stage cooling between each stage to achieve a semi-isothermal process.
Since minimum wetting flow rate was approximately 0,02 l/mmin, (wetted perimeter equals to the plate width), temperature of the film decreases and process parameters became like in the isothermal process. This was recorded for every tested temperature.
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