This study analyzes the effect of condenser design variations on the yield and efficiency of biodiesel production in a distillation apparatus. The condenser tube was modified with different shapes but maintained an identical cross-sectional area. The distillation results were analyzed using T-tests in SPSS to evaluate parameters such as effectiveness, production efficiency, cetane number, flash point, fire point, and water content. The findings revealed that the spiral condenser is more effective in enhancing efficiency and biodiesel quality compared to the straight condenser, showing higher cetane numbers, yields, and overall effectiveness. However, the water content did not significantly differ between the two condenser designs. In conclusion, the spiral condenser is superior in supporting the biodiesel distillation process, although the water content remains similar across both condenser types
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