บทคัดย่องานวิจัย

หมวดหมู่ : ฐานข้อมูลงานวิจัย

Numerical simulation of forced-air cooling of deep beds of fruits with different geometries.

Teruel B.M., Kieckbusch T.G., Cortez L., Lima A.G., Castro E.

5th International Postharvest Symposium . Volume of Abstract . Verona, Italy 6-11 June 2004, p.74

2004

บทคัดย่อ

Numerical simulation of forced-air cooling of deep beds of fruits with different geometries.  The development of proper simulation techniques for agriculture crops cooling processes can become a valuable optimization tool since the kinetics of critical temperature ranges crossing can be predicted and/or design criteria for refrigeration systems and packaging load can be predicted and/or design criteria for refrigeration systems and packaging load can be established in advance, in order to obtain the highest cooling rate.

This work presents a physical-mathematical model and the corresponding numerical procedures scheme, describing the cooling process of a bed of solid particles under conditions found in vegetables cooling systems. Different geometries are considered for the shape of the produces, and the bed dimensions conform the commercially available packages.The mass and energy balances equations of the interacting phases (solids and cooling fluid) were solved using Finite Volume Method.

The numerical results were compared to experimental data obtained with a load of oranges and of bananas, cooled in a forced air tunnel at a temperature of 1 °C and 5 °C and air velocity of 1.0 m s-1 .The fitting parameter was the heat transfer coefficient.The temperature distribution pattern of the air and of the products along the bed is presented and discussed.