2 replies to this topic

[jordan1111]

I have two quick questions regarding the calculation of change in concentration in a tank. 

1. Assume same inlet and outlet flow rate, the NaCl concentration in the tank is 50g/l, the inlet has 100 g/l of NaCl, what is the equation to calculate the NaCl concentration in the tank at any given time? 

Is it =100-((100-50)*e^(-(t/residence time)))?

 

2. Assume same inlet and outlet flow rate, the NaCl concentration in the tank is 50 g/l, the inlet has 0 g/l of NaCl, but the concentration of NaCl in tank can only go as low as 15 g/l, what is the equation to calculate the NaCl concentration in the tank at any given time? 

Is it = 15-((15-50)*e^(-(t/residence time)))?

 

Thanks in advance.

[breizh]

Hi,

Sounds good to me.

Validate the initial and final conditions ; t=0 and t= "infinity" for both cases.

Breizh 

[jordan1111]

Thank you Breizh.