| F |
|
feed rate, mole per hour |
| H_F |
|
feed enthalpy, BTU/lb |
| D |
|
distillate rate, mole per hour |
| xF |
|
feed composition, mole fraction |
| xD |
|
distillate composition, mole fraction |
| xW |
|
residue composition, mole fraction |
| q |
|
feed quality |
| R |
|
reflux ratio) |
| T_b |
|
bubble point, deg F) |
| T_d |
|
dew point, deg F) |
| T_W |
|
residue temperature, deg F) |
| ΔH_sD |
|
enthalpy of solution, distillate, BTU per lb) |
| ΔH_sW |
|
enthalpy of solution, residue, BTU per lb) |
| c_A |
|
heat capacity of A, BTU per lb per deg F) |
| c_B |
|
heat capacity of B, BTU per lb per deg F) |
| M_A |
|
molecular weight of A) |
| M_B |
|
molecular weight of B) |
| λA |
|
latent heat of vaporization of A, BTU per lb) |
| λB |
|
latent heat of vaporization of B, BTU per lb) |