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물질수지계산

글쓴이 : 열공해야지 고유ID : naomily 날짜 : 11-04-04 13:02 조회 : 6291

a holding facility in a good processing plant has two tanks for fluid product. the operator needs to calculate the amount of time she can leave the tank that is filling before she has to divert the flow to the second tank. the volume of the tank in 10m３. the fluid stream enters the tank at 6kg/s(density of 1000kg/m３). the tank is 1/2 filled.the material leaves the tank to be packed at 2kg/s. how much time will it take to fill the tank?

제 생각에는 unsteady state같은데 식을 못 세우겠어요. 식을 어떻게 해야 될까요?

Stefano

11-04-04 13:48

글쓴이 이름 바꾸세요.
(Input Rate)-(Output Rate)=(Accumulation Rate)
Qi - Qo = (mi/ρ) - (mo/ρ) = dV/dt ...(1) mi, mo = Input., Output Mass Rate
V at t=0 = 5 m3 .............................(2) Initial Condition
V at ts = 10 m3..............................(3) Final Boundary Condition at switch-over

열공해야지 naomily

11-04-05 12:52

정말 감사드립니다. 이름으로 하려고했는데 이미 사용중이라고 하네요. 잘 생각해보고 정하겠습니다.