الفهرس 
INTRODUCTIONOnly 14 pages are availabe for public view
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Abstract
The rheological properties of soy bean milk were studied using a Brookfield viscometer at various temperature 5, 10, 30, 50, 70, 90°C at shear rate, (46.5– 220 s-1).
The result show that the all samples exhibited non-Newtonian pseudoplastic behavior at all temperature examined and the shear stress of soy bean milk increases with increasing shear rate.
Also, the study shows the effect of temperature on the apparent viscosity of soy bean milk, so that, the apparent viscosity decreases as temperature increase and follows Arrhenius model.
Also, the activation energy of soy bean milk decreases with increasing temperature.
In this study the optimization of plate heat exchanger and achieving set of optimal solutions each of which is a trade-off between the highest total rate of heat transfer and the least total annual cost. The principal advantage of this work is providing a wide range of optimal solutions which allows the user to choose the best design parameters regarding the application and the total annual cost of the system.
The relation between the mass flow rate of milk, water and heat exchange rate was observed that the flow rate increase the heat exchange rate increased for both fluids. Also, as number of plates increase the heat transfer area increased.
Optimization of flow velocity and number of plates in a plate heat exchanger is studied. A case study has been presented to show the optimized results. Pressure drops, Prandtl number, and Reynolds number were determined for both fluids. It was found that the minimum flow velocity is 2.25 m/s, optimum number of plates is 17 plates and the minimum total annual cost is 35000 EGP/year for annual production rate 43797.65 m3/year.
Recommendation
1- Studying the rheological properties of different fluids and the flow behavior of these fluids.
2- Studying the optimum flow velocity and number of plate heat exchanger used in food processing.
3- Optimization of complex design with respect to particular industrial applications.
4- To improve the effectiveness of plate heat exchanger, it is important to keep the heat exchanger clean and to use fluids that are compatible with the materials of the heat exchanger. It’s also important to design the heat exchanger with a large surface area and a high heat transfer coefficient.
5- Reduce the temperature difference between the two fluids (water and soy bean milk)