The most crucial factors to consider when creating soybean milk, a device for transferring heat between two fluids, are the heating conditions. The field of thermal engineering is particularly active when it comes to heat exchanger design optimization. Using performance data on the use of cooling soybean milk with chilled water, an optimum channel flow velocity and an ideal number of plates were determined. To determine the optimum channel flow velocity and plate count, performance data on the use of cooling soybean milk with cold water were used. Using a Brookfield rheometer, the apparent viscosity of soybean milk was determined on both the hot and cold sides. Additionally, the annual cost, purchase cost, and fixed cost were calculated. Pressure drops and Reynolds numbers for fluids were computed. For an annual production rate of 43797.65 m³/year, it was discovered that the minimum flow velocity is 2.25 m/s, the ideal number of plates is 17, and the minimal total yearly cost is 35000 L.E./year.