30-06-2024 - Energy systems - Ideal cycle performance(2)[EN]-[IT]
~~~ La versione in italiano inizia subito dopo la versione in inglese ~~~
ENGLISH
30-06-2024 - Energy systems - Ideal cycle performance(2)[EN]-[IT]
Ideal Cycle Performance(2)
Work completed in one cycle
The work performed in a cycle by a volumetric compressor in the ideal case is expressed with the following formula.
This expression is obtained taking into account that the transformations 2-3 and 4-1 are isobars (thermodynamic transformation in which the pressure remains constant)
The work is therefore seen as the area included on the cycle in the p.V. plan.
NOTE:
In the ideal case, it is assumed that the compressor works without energy losses.
Absorbed power
The power absorbed by a reciprocating volumetric compressor in the ideal case is expressed in the following way.
NOTE:
The power is obtained by keeping the definition of displacement in mind and inserting the filling coefficient into the calculations.
Work per unit mass
The work per unit mass processed in one cycle by a positive displacement compressor in the ideal case is expressed as follows.
The work per unit mass processed in one cycle by an ideal positive displacement compressor is determined by the initial and final thermodynamic conditions of the gas.
Conclusions
The work done by the compressor in the ideal cycle can be calculated mainly in the adiabatic compression phase. An adiabatic transformation is a thermodynamic process in which a system does not exchange heat with the environment
Request
Have you ever calculated the ideal cycle performance of an ideal positive displacement compressor?
ITALIAN
30-06-2024 - Sistemi energetici - Prestazioni del ciclo ideale(2)[EN]-[IT]
Prestazioni del ciclo ideale(2)
Lavoro compiuto di un ciclo
Il lavoro compiuto in un ciclo da un compressore volumetrico nel caso ideale si esprime con la seguente formula.
Questa espressione si ricava tenendo conto che le trasformazioni 2-3 e 4-1 sono isobare (trasformazione termodinamica nella quale la pressione rimane costante)
Il lavoro è dunque visto come l’area compresa sul ciclo nel piano p.V.
NOTA:
Nel caso ideale, si assume che il compressore lavori senza perdite di energia.
Potenza assorbita
La potenza assorbita da un compressore volumetrico alternativo nel caso ideale si esprime nella seguente maniera.
NOTA:
La potenza si ricava tenendo bene in mente la definizione di cilindrata e inserendo nei calcoli il coefficiente di riempimento.
Lavoro per unità di massa
Il lavoro per unità di massa elaborata in un ciclo da un compressore volumetrico nel caso ideale è espresso come segue.
Il lavoro per unità di massa elaborata in un ciclo da un compressore volumetrico ideale è determinato dalle condizioni termodinamiche iniziali e finali del gas.
Conclusioni
Il lavoro compiuto dal compressore nel ciclo ideale può essere calcolato principalmente nella fase di compressione adiabatica. Una trasformazione adiabatica è un processo termodinamico in cui un sistema non scambia calore con l'ambiente
Domanda
Avete mai calcolato le prestazioni del ciclo ideale di un compressore volumetrico ideale?
THE END
The formula of absorbed power is quite long though. Nice topic!
I enjoyed this course and I’m familiar with it. We did something like that when I was in high school but not as advanced as this
Keep up the good work. 👏🎵
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