Temperature dependent electrical conductivities of fruit purees during ohmic heating
Ohmic heating takes its name from Ohm's law; the food material switched between electrodes has a role of resistance in the circuit. In this study, the apricot and peach purees were heated on a laboratory scale static ohmic heater by applying voltage gradients in the range of 20-70 V/cm. The vol...
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| Format: | Article |
| Language: | English English |
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Elsevier
2005
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| Online Access: | http://psasir.upm.edu.my/id/eprint/18359/1/Temperature%20dependent%20electrical%20conductivities%20of%20fruit%20purees%20during%20ohmic%20heating.pdf |
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| author | Icier, Filiz Ilicali, Coskan |
| author_facet | Icier, Filiz Ilicali, Coskan |
| author_sort | Icier, Filiz |
| collection | UPM |
| description | Ohmic heating takes its name from Ohm's law; the food material switched between electrodes has a role of resistance in the circuit. In this study, the apricot and peach purees were heated on a laboratory scale static ohmic heater by applying voltage gradients in the range of 20-70 V/cm. The voltage gradient was statistically significant on the ohmic heating rates for both purees (P < 0.05). The linear temperature dependent electrical conductivity relations were obtained. Bubbling was observed above 60°C especially at high voltage gradients. The ohmic heating system performance coefficients were in the range of 0.49-1.00. The unsteady-state heat conduction equation for negligible internal resistance was solved with an ohmic heating generation term by the finite difference technique. The predictions of the mathematical model using obtained electrical conductivity equations were found to be very accurate. © 2005 Elsevier Ltd. All rights reserved. |
| first_indexed | 2024-03-06T07:43:00Z |
| format | Article |
| id | upm.eprints-18359 |
| institution | Universiti Putra Malaysia |
| language | English English |
| last_indexed | 2024-03-06T07:43:00Z |
| publishDate | 2005 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | upm.eprints-183592015-10-02T01:06:17Z http://psasir.upm.edu.my/id/eprint/18359/ Temperature dependent electrical conductivities of fruit purees during ohmic heating Icier, Filiz Ilicali, Coskan Ohmic heating takes its name from Ohm's law; the food material switched between electrodes has a role of resistance in the circuit. In this study, the apricot and peach purees were heated on a laboratory scale static ohmic heater by applying voltage gradients in the range of 20-70 V/cm. The voltage gradient was statistically significant on the ohmic heating rates for both purees (P < 0.05). The linear temperature dependent electrical conductivity relations were obtained. Bubbling was observed above 60°C especially at high voltage gradients. The ohmic heating system performance coefficients were in the range of 0.49-1.00. The unsteady-state heat conduction equation for negligible internal resistance was solved with an ohmic heating generation term by the finite difference technique. The predictions of the mathematical model using obtained electrical conductivity equations were found to be very accurate. © 2005 Elsevier Ltd. All rights reserved. Elsevier 2005-12 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/18359/1/Temperature%20dependent%20electrical%20conductivities%20of%20fruit%20purees%20during%20ohmic%20heating.pdf Icier, Filiz and Ilicali, Coskan (2005) Temperature dependent electrical conductivities of fruit purees during ohmic heating. Food Research International, 38 (10). pp. 1135-1142. ISSN 0963-9969 http://dx.doi.org/10.1016/j.foodres.2005.04.003 Electric conductivity Fruit - Processing Electric heating doi:10.1016/j.foodres.2005.04.003 English |
| spellingShingle | Electric conductivity Fruit - Processing Electric heating Icier, Filiz Ilicali, Coskan Temperature dependent electrical conductivities of fruit purees during ohmic heating |
| title | Temperature dependent electrical conductivities of fruit purees during ohmic heating |
| title_full | Temperature dependent electrical conductivities of fruit purees during ohmic heating |
| title_fullStr | Temperature dependent electrical conductivities of fruit purees during ohmic heating |
| title_full_unstemmed | Temperature dependent electrical conductivities of fruit purees during ohmic heating |
| title_short | Temperature dependent electrical conductivities of fruit purees during ohmic heating |
| title_sort | temperature dependent electrical conductivities of fruit purees during ohmic heating |
| topic | Electric conductivity Fruit - Processing Electric heating |
| url | http://psasir.upm.edu.my/id/eprint/18359/1/Temperature%20dependent%20electrical%20conductivities%20of%20fruit%20purees%20during%20ohmic%20heating.pdf |
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