Then, finally, a new equation was created for predicting the solidification rate of the tubular ice under the suitable conditions of the production process. This equation relates the thickness of tubular ice, the temperature of refrigerant and time in tubular ice production process and is effective for real processing in ice-houses. Consequently, from the conditions of research for this case study. The optimal refrigerant temperature in an ice production process with tubular ice thickness of 12 mm is -7.5 ◦C and the optimal time in tubular ice production process about is 31.5 minutes.