| Mistake | Consequence | Solution | |---------|-------------|----------| | Using h_fg instead of h_f for feedwater heating | Overestimation of heat addition | Remember: h_f is saturated liquid, h_fg is latent heat. | | Forgetting to convert bar to kPa (or vice versa) | Orders of magnitude error | Keep units consistent. Khurmi often uses bar; 1 bar = 100 kPa. | | Assuming h_g is the same for superheated steam | Wrong enthalpy at high temp | Use superheat table, not saturation table. | | Misreading v_g as volume of liquid | Absurd volume calculations | v_g is vapor volume (large), v_f is liquid volume (small). |
