Citation
Chaiwanichsiri S., . and Laohasongkram K., . and Thunpitayakul C., . and Mekmanee S., . Thermophysical properties of fresh and frozen pineapples Ananas comosus. pp. 1-5. ISSN 1505-5337
Abstract
The specific heat and thermal conductivity of pineapple (Ananas comosus (L.) Merr. var. caefenne) were determined at high (60 to 100 degree C) and low (-10 to -30 degree C) temperatures and at moisture contents of 60 to 80 percent using a modified form of the method of mixtures for specific heat and the line probe method for thermal conductivity. At high temperatures the thermal properties of the samples varied with temperature and moisture content while at subzero temperatures only dependence on moisture content was significant. Regression analyses indicated that at high temperatures C subscript p 3.224 - 0.0063T 0.0075M 5.44 x 10 (-5) T (-2) (R (-2) 0.946) and k 1.577 - 0.0376T - 0.0030M 1.68 x 10 (-4) TM 1.96 x 10 (-4) T (2) (R (2) 0.975). At low temperatures the relationships were found to be C subscript p 1.750 3.49 x 10-3)M (R2) 0.874) and k 3.082 - 0.0270T - 0.0719M - 0.0004T2 0.0005M2 (R2) 0.942).
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Abstract
The specific heat and thermal conductivity of pineapple (Ananas comosus (L.) Merr. var. caefenne) were determined at high (60 to 100 degree C) and low (-10 to -30 degree C) temperatures and at moisture contents of 60 to 80 percent using a modified form of the method of mixtures for specific heat and the line probe method for thermal conductivity. At high temperatures the thermal properties of the samples varied with temperature and moisture content while at subzero temperatures only dependence on moisture content was significant. Regression analyses indicated that at high temperatures C subscript p 3.224 - 0.0063T 0.0075M 5.44 x 10 (-5) T (-2) (R (-2) 0.946) and k 1.577 - 0.0376T - 0.0030M 1.68 x 10 (-4) TM 1.96 x 10 (-4) T (2) (R (2) 0.975). At low temperatures the relationships were found to be C subscript p 1.750 3.49 x 10-3)M (R2) 0.874) and k 3.082 - 0.0270T - 0.0719M - 0.0004T2 0.0005M2 (R2) 0.942).
Additional Metadata
| Item Type: | Article |
|---|---|
| Additional Information: | Summary (En) |
| AGROVOC Term: | PINEAPPLES |
| AGROVOC Term: | ANANAS COMOSUS |
| AGROVOC Term: | FRESH PRODUCTS |
| AGROVOC Term: | FROZEN FRUITS |
| AGROVOC Term: | THERMAL PROPERTIES |
| AGROVOC Term: | SPECIFIC HEAT |
| AGROVOC Term: | THAILAND PINA |
| AGROVOC Term: | ANANAS COMOSUS |
| AGROVOC Term: | PRODUCTOS FRESCOS |
| AGROVOC Term: | FRUTAS CONGELADAS |
| Depositing User: | Ms. Norfaezah Khomsan |
| Last Modified: | 24 Apr 2025 05:52 |
| URI: | http://webagris.upm.edu.my/id/eprint/17547 |
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