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Problema termodinamica ... va rog sa ma ajutati :(
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Strumfy
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(since 18-12-2011 07:34)
Joined: 17 Dec 2011
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Posted: 17-12-2011, 23:33:58
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Un motor cu aprindere prin comprimare in 4 timpi , functioneaza dupa ciclul teoretic cu ardere mixta si are urmatorii parametrii: cilindreea Vs=2,6 litri, raportul de compresie ε=16,6, raportul de crestere al presiunii la volum constant λ=1,96, factorul de injectie ρ=1,66, turatia de functionare nr=3500 rot/min. Motorul aspira la temperatura T1=316 K si presiunea p1=1,16 bar. Se cer:
1. sa se calculeze marimile de stare p, V, T in punctele caracteristice
2. sa se calculeze schimbul de lucru mecanic si caldura si variatia marimilor calorice de stare pe fiecare evolutie in parte si pe tot ciclul
3. sa se calculeze randamentul termodinamic al ciclului, consumul orar si consumul specific daca puterea calorifica inferioara a lui este Hi=43500kJ/kg.
Raman dator daca ma puteti ajuta
... Va rog mult de tot !
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