POMOCY !!!
Oblicz sprawnosc silnika cieplnego ktory wykonuje prace 20MJ a do chlodnicy przekazuje 4·10⁶J energii.
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dane:
W = 20 MJ = 20·10⁶ J
Q₂ = 4·10⁶ J
szukane:
η = ?
Korzystamy z wzoru:
η = W/Q * 100%
W = Q₁ - IQ₂I
Q₁ = W + IQ₂I
η = W/(W+IQ₂I)·100%
η = [20*10⁶/(20*10⁶+4*10⁶)]*100% = 20/24 * 100% = 0,83*100%
η = 83%
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