The convective heat transfer coefficient was quanti- fied over time during the boiling phase of deep-fat frying with values ranging from 94.22±0.33 to 774.88±3.89 W/m2 K for different formulation of potato dough at different temperature of frying oil.
Higher oil temperature for deep-fat frying increased the values of heat transfer coefficient for the same composition of spherical shape dough, while elevated amount of whole potato flour in dough considerably decreased the heat transfer coefficient regardless of the frying oil temperature