Optimal Design of Complementary Experiments for Parameter Estimation at Elevated Temperature of Food Processing
Issued Date
2022-09-01
Resource Type
eISSN
23048158
Scopus ID
2-s2.0-85137746411
Journal Title
Foods
Volume
11
Issue
17
Rights Holder(s)
SCOPUS
Bibliographic Citation
Foods Vol.11 No.17 (2022)
Suggested Citation
Benyathiar P., Dolan K.D., Mishra D.K. Optimal Design of Complementary Experiments for Parameter Estimation at Elevated Temperature of Food Processing. Foods Vol.11 No.17 (2022). doi:10.3390/foods11172611 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/83155
Title
Optimal Design of Complementary Experiments for Parameter Estimation at Elevated Temperature of Food Processing
Author(s)
Author's Affiliation
Other Contributor(s)
Abstract
Simultaneous estimation of thermal properties can be challenging, especially when the parameters are temperature-dependent. Previous research has shown that by using a complementary experiment, temperature-dependent thermal conductivity can be estimated using a single experiment. The objective of this study was to optimize the complementary experiments that can facilitate the simultaneous estimation of temperature-dependent thermal conductivity and volumetric heat capacity. A theoretical study was conducted with two experiments in a single trial with the sample being kept in a cylindrical sample holder, which had a thin film heater in the center. The first part of the experiment was conducted by keeping the external surface temperature at 50 °C for 300 s and allowing the center temperature to equilibrate with the boundary temperature. Then, the second part of the experiment followed, where the thin film heater was supplied with electrical power to increase the center temperate to 140 °C. Several heating profiles were studied to maximize the information obtained from the complementary experiments, and the best one was the power profile with a sinusoidal function. All four parameters of sweet potato puree temperature-dependent thermal conductivity (0.509 to 0.629 W/mK at 25 °C and 140 °C, respectively) and volumetric heat capacity (3.617 × 106 to 4.180 × 106 J/m3K at 25 °C and 140 °C, respectively) were estimated with low standard errors.