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Il motore a combustione
Project Work
Prof. Feliciano Capone
2
Per poter rendere comprensibile e
riproducibile il tuo progetto è importante
che tu chiarisca qualche punto:
IL PROGETTO
Argomento:
Il motore a combustione
Materiali:
Testo
Titolo: L’Amaldi per i licei scientifici.blu Autore: Ugo Amaldi
Editore: Zanichelli
Video:
https://www.youtube.com/watch?v=4GeaV7xdATU
https://www.youtube.com/watch?v=u7geC32XZrY
https://www.youtube.com/watch?v=YNGtJo-VspE
Contesto: Classe IV A e IV C
3
IN CLASSE
Warm Up: Le trasformazioni termodinamiche
Quando un sistema passa da uno stato termodinamico A ad
uno stato termodinamico B si ha una trasformazione
termodinamica
Gli stati termodinamici e le trasformazioni possono essere
rappresentate in un diagramma Pressione-Volume (piano
di Clapeyron)
Gli stati termodinamici sono rappresentati da PUNTI le
trasformazioni da LINEE.
Volume
Pressione
A
B
4
IN CLASSE
Warm Up: Le trasformazioni termodinamiche
Trasformazione REVERSIBILE:
La trasformazione deve avvenire in modo estremamente lento (Trasf. Quasi
statica) di modo che in ogni stadio intermedio le variabili termodinamiche siano
sempre perfettamente determinate.
Tra tutte le trasformazioni reversibili ve ne sono alcune particolarmente
importanti: Trasf. ISOTERMA, Trasf. ISOBARA, Trasf. ISOCORA, Trasf.
ADIABATICA.
Q >
0
W > 0
T
A BPA =
PB
VA V
B
WAB
A
B
volume
A
B
PA
VA = VB
PB
A
B
5
IN CLASSE
Warm Up: Le trasformazioni termodinamiche
Tabella riepilogative per calcolo del lavoro, calore e energia
interna
6
IN CLASSE
Attività:
 Generalità
 Cenni storici
 Descrizione ciclo teorico
 Lavoro utile
 Rendimento
 Applicazioni
Ciclo OTTO
https://www.youtube.com/watch?v=4GeaV7xdATU
7
IN CLASSE
Attività:
Ciclo OTTO
Trasformazioni termodinamiche
1) 1-2 adiabatica di
compressione
2) 2-3 isometrica in cui si
fornisce calore
3) 3-4 adiabatica di
espansione
4) 4-1 isometrica in cui si
sottrae calore ritornando
alle condizioni iniziali
https://www.youtube.com/watch?v=u7geC32XZrY
8
IN CLASSE
Attività:
Ciclo DIESEL
1) 1-2 adiabatica di
compressione
2) 2-3 isobara in cui si
fornisce calore
3) 3-4 adiabatica di
espansione
4) 4-1 isometrica in cui si
sottrae calore ritornando
alle condizioni iniziali
Trasformazioni termodinamiche
https://www.youtube.com/watch?v=YNGtJo-VspE
9
IN CLASSE
La verifica finale sarà effettuata
utilizzando un test ZTE Zanichelli
Verifica:
Projectwork capone   copia

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Projectwork capone copia

  • 1. Il motore a combustione Project Work Prof. Feliciano Capone
  • 2. 2 Per poter rendere comprensibile e riproducibile il tuo progetto è importante che tu chiarisca qualche punto: IL PROGETTO Argomento: Il motore a combustione Materiali: Testo Titolo: L’Amaldi per i licei scientifici.blu Autore: Ugo Amaldi Editore: Zanichelli Video: https://www.youtube.com/watch?v=4GeaV7xdATU https://www.youtube.com/watch?v=u7geC32XZrY https://www.youtube.com/watch?v=YNGtJo-VspE Contesto: Classe IV A e IV C
  • 3. 3 IN CLASSE Warm Up: Le trasformazioni termodinamiche Quando un sistema passa da uno stato termodinamico A ad uno stato termodinamico B si ha una trasformazione termodinamica Gli stati termodinamici e le trasformazioni possono essere rappresentate in un diagramma Pressione-Volume (piano di Clapeyron) Gli stati termodinamici sono rappresentati da PUNTI le trasformazioni da LINEE. Volume Pressione A B
  • 4. 4 IN CLASSE Warm Up: Le trasformazioni termodinamiche Trasformazione REVERSIBILE: La trasformazione deve avvenire in modo estremamente lento (Trasf. Quasi statica) di modo che in ogni stadio intermedio le variabili termodinamiche siano sempre perfettamente determinate. Tra tutte le trasformazioni reversibili ve ne sono alcune particolarmente importanti: Trasf. ISOTERMA, Trasf. ISOBARA, Trasf. ISOCORA, Trasf. ADIABATICA. Q > 0 W > 0 T A BPA = PB VA V B WAB A B volume A B PA VA = VB PB A B
  • 5. 5 IN CLASSE Warm Up: Le trasformazioni termodinamiche Tabella riepilogative per calcolo del lavoro, calore e energia interna
  • 6. 6 IN CLASSE Attività:  Generalità  Cenni storici  Descrizione ciclo teorico  Lavoro utile  Rendimento  Applicazioni Ciclo OTTO https://www.youtube.com/watch?v=4GeaV7xdATU
  • 7. 7 IN CLASSE Attività: Ciclo OTTO Trasformazioni termodinamiche 1) 1-2 adiabatica di compressione 2) 2-3 isometrica in cui si fornisce calore 3) 3-4 adiabatica di espansione 4) 4-1 isometrica in cui si sottrae calore ritornando alle condizioni iniziali https://www.youtube.com/watch?v=u7geC32XZrY
  • 8. 8 IN CLASSE Attività: Ciclo DIESEL 1) 1-2 adiabatica di compressione 2) 2-3 isobara in cui si fornisce calore 3) 3-4 adiabatica di espansione 4) 4-1 isometrica in cui si sottrae calore ritornando alle condizioni iniziali Trasformazioni termodinamiche https://www.youtube.com/watch?v=YNGtJo-VspE
  • 9. 9 IN CLASSE La verifica finale sarà effettuata utilizzando un test ZTE Zanichelli Verifica: