Temperature Response of Frozen Peas to Di‐Thermal Storage Regimes

Abstract

A mathematical model was developed for prediction of temperature fluctuations in warehouse stacks of frozen peas subjected to dithermal storage regimes. The model was tested by comparing its predictions with temperatures measured in frozen peas packed into a slab-shaped container. Satisfactory agreement was found between model and experiment. Other model predictions indicate that large container sizes and rapid fluctuation regimes result in the greatest thermal stability at interior locations in bulk-stored peas. Thermal properties of frozen peas were also determined as part of the experimental verification. The model can be used to evaluate quality changes in frozen products due to d&thermal storage and the energy needed to maintain a certain final quality.

Effect of Packaging Materials on Temperature Fluctuations in Frozen Foods: Mathematical Model and Experimental Studies

“…A symmetric regime composed of five zones represented by constant slope segments (straight lines), as presented,by Sastry and Kilara (1983).…”

“…The cycle was composed by ten 24 hr subcycles identical to the experimental regime. The Fourier sine series yielded 10 consecutive equal curves prior to change to a "mirror reflection" pattern (Sastry and Kilara, 1983).…”

“…Zurtiz and Singh (1985) simulated the effect of temperature changes through the frozen food chain. Sastry and Kilara (1983) developed a model for frozen foods exposed to di-thermal storage regimes; wherein, a conservative prediction was obtained by neglecting the influence of packaging materials. Scott and Heldman (1984) attempted the prediction of frozen food quality during fluctuating temperature storage using a finite difference model.…”