How about if I want to model the output temperature as a function of mass flow rate? How do I go about getting the differential equation and solving that?
They used W as the mass flow rate, not the volumetric. Here, W = F*rho, where F is the volumetric flow rate. And that's how you get rid of the density terms.
You probably dont give a shit but if you are stoned like me atm then you can stream all of the new series on InstaFlixxer. I've been watching with my girlfriend these days xD
Accumulation is defined as the change of energy in the tank. If positive, it means that it is gaining energy, if negative, it is losing energy. d(energy)/dt means Change of energy in the tank over time. Hence we can say that the accumulation term here is d(energy)/dt It is almost the same as our mass balance where accumulation is taken is d(mass)/dt. The change in the mass in the tank over time. If positive, means mass is increasing, if negative, means mass is decreasing~
Hi, thank you for the video. Could I enquire too on what if there is heat loss from the tank? How should we include the heat loss term into the model?
How about if I want to model the output temperature as a function of mass flow rate? How do I go about getting the differential equation and solving that?
The final equation in this screencast is a differential equation that models output temperature as a function of mass flow rate
Wouldn't you have to multiply the WCp terms by rho to get things in mass terms since we are expressing enthalpy on a per mass basis?
They used W as the mass flow rate, not the volumetric. Here, W = F*rho, where F is the volumetric flow rate. And that's how you get rid of the density terms.
You probably dont give a shit but if you are stoned like me atm then you can stream all of the new series on InstaFlixxer. I've been watching with my girlfriend these days xD
@Remy Anderson Yea, I've been using instaflixxer for since november myself :D
How to code it
why is accumulation taken as d(energy)/dt ???
Accumulation is defined as the change of energy in the tank. If positive, it means that it is gaining energy, if negative, it is losing energy.
d(energy)/dt means Change of energy in the tank over time.
Hence we can say that the accumulation term here is d(energy)/dt
It is almost the same as our mass balance where accumulation is taken is d(mass)/dt. The change in the mass in the tank over time. If positive, means mass is increasing, if negative, means mass is decreasing~