sistemul termic numarul 9
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Sistemul termic nr 9
TRANSCRIPT
Referat la fizică
Sistemul termic cu numărul 9.
Elevi : Alecu Mihnea
Costea Alexandru
Georgescu Alexandru
η=f (ε , γ ) ε=V 3V 1
γ=C p
C v
Q1
1 2
Q = 0
T1=ct
Q2
3
η = 1 - |Q2|Q1
Q1 = ν Cp (T2-T1)
|Q2|=ν RT1 lnV 3V 1
η = 1 - RT 1 ln
V 3V 1
C p ¿¿
Din γ = CpC v
⟹Cp = γCp - γCv
Cp – R ; Cp=γRγ−1
η = 1 - RT1 ln
V 3V 1
γ Rγ−1
(T 2−T 1) =
(γ−1)T1 lnV 3V 1
γ (T 2−T 1) =
(γ−1 ) lnV 3V 1
γ (T 2T 1
−1)
V 1T 1
= V 2T 2
⟹ T2T1
=V 2V 1
p1V2γ
= p3V3γ
(*) V2γV3= V3
γ⟹ V2=V3γ√V 1V 3 =V3
1εγ
⟹
p3V3= p1V1
⟹ T2T1 =
V 31ε γ
V 1 = ε
ε1γ = ε
1−1γ
η = 1 - ( γ−1 ) lnε
γ (ϵ1−1γ−1)
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