The current study examines the mass and heat transfer properties of an Agitated Thin Film Evaporator (ATFE) used to purify crude glycerol produced during the manufacturing of biodiesel. Glycerol-water-methanol combinations were used in experiments with feed flow rates between 5.875 and 7.875 LPH and rotor speeds between 40 and 70 RPM in a vacuum. Predictions from Penetration Theory, Skelland, Trammelen–Beek–Van de Westelaken, Weisser, and Bott–Romero correlations were compared with the impact of operating parameters on process-side heat transfer coefficient (HTC), evaporation rate, and glycerol purity. As the rotor speed and feed flow rate increased, the experimental HTC values found to be increased from 848 to 1653 W m-2 °C-1. At 65 RPM and 7.875 LPH, the greatest HTC of 1653.46 W m-2 °C-1was observed, suggesting that there is an ideal agitation level beyond which heat transfer enhancement becomes negligible. Glycerol purity increased from 85.60% to 92.52%, while the evaporation rate rose from 2.33 to 3.40 kg h-1. A comparison showed that the Weisser correlation underestimated HTC by about 40% while the Skelland and Bott-Romero models predicted HTC values within ±10–20% of experimental observations. With a good association with feed flow rate (R²=0.92), the Bott–Romero model demonstrated the largest dependence on hydrodynamic circumstances. Evaporation efficiency was increased and sensible heat requirements were decreased by preheating the input to 60°C. The findings show that ATFE is a scalable and energy-efficient method for purifying crude glycerol that can achieve glycerol purity levels above 92% with enhanced thermal performance and evaporation efficiency.