BILANTURI DE MATERIALE SI ENERGIE - Cadre Didactice
BILANTURI DE MATERIALE SI ENERGIE - Cadre Didactice
BILANTURI DE MATERIALE SI ENERGIE - Cadre Didactice
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BILANŢ <strong>DE</strong> <strong>MATERIALE</strong> ÎN REGIM NESTAŢIONAR<br />
oBilanţul unui component oarecare A k se<br />
scrie sub forma:<br />
∑a<br />
v<br />
a<br />
oDiferenţiind ultimul membru, (41) devine:<br />
∑a<br />
v<br />
a<br />
Lucian Gavrila – Bilanturi de materiale si de energie<br />
( e<br />
x ⋅M<br />
)<br />
∑<br />
a a a<br />
e e e e ∂ Ak<br />
⋅ ρ ⋅S<br />
⋅ x Ak = v ⋅ ρ ⋅S<br />
⋅ x Ak +<br />
(41)<br />
∂t<br />
e<br />
∑<br />
e<br />
a a a<br />
e e e e e ∂M<br />
∂x<br />
Ak<br />
⋅ ρ ⋅S<br />
⋅ x Ak = v ⋅ ρ ⋅S<br />
⋅ x Ak + x Ak ⋅ + M ⋅ (42)<br />
∂t<br />
∂t<br />
e<br />
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