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Variable high frequency voltage source for an ohmic heating process

Heating is an important step in food processing. A new method of heating uses the natural electrical resistance of the food to generate heat. In this method electrical energy is transformed into thermal energy. This kind of food heating processing operation is called ohmic heating. The rate of ohmic...

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Main Authors: Toudeshki, Arash Mohammadi, Mariun, Norman, Hizam, Hashim, Bashi, Senan Mahmood, Jamaludin, Hishamuddin
Format: Conference or Workshop Item
Language:English
Published: IEEE 2008
Online Access:http://psasir.upm.edu.my/id/eprint/47788/1/Variable%20high%20frequency%20voltage%20source%20for%20an%20ohmic%20heating%20process.pdf
http://psasir.upm.edu.my/id/eprint/47788/
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spelling my.upm.eprints.477882016-07-15T05:26:02Z http://psasir.upm.edu.my/id/eprint/47788/ Variable high frequency voltage source for an ohmic heating process Toudeshki, Arash Mohammadi Mariun, Norman Hizam, Hashim Bashi, Senan Mahmood Jamaludin, Hishamuddin Heating is an important step in food processing. A new method of heating uses the natural electrical resistance of the food to generate heat. In this method electrical energy is transformed into thermal energy. This kind of food heating processing operation is called ohmic heating. The rate of ohmic heating critically depends on the Electrical Conductivity of the food during the process. Reviewing a number of researches shows that the usage of direct current for ohmic heating process causes electrolyze in liquid beverages. Moreover, usage of alternating current eliminates the probability of adverse electrochemical reaction. In addition, when the frequency increases, the risk of oxidation in electrodes will decrease. In this regard, for heating different kinds and sizes of food, it is necessary to have an electrical power source with variable output voltage and frequency. This research attempts to design and simulate the variable voltage and frequency electrical power source to feed a 10 kW ohmic heating process at high frequency (10 kHz). The ohmic heating load is simulated by three-phase resistive load. According to Joulepsilas first law, the temperature in heat generation process is closely related to electrical power and time of process. Hence, in this simulation, the value of temperature is controlled by value of power that is generated by current which flows through resistive load with control of the time period and the duty cycle. Furthermore, one of the most important things to have an effective ohmic heating process is supplying the continuous current during the process. The result of this study indicated a simple method to supply a continual current for load during the ohmic heating process. IEEE 2008 Conference or Workshop Item PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/47788/1/Variable%20high%20frequency%20voltage%20source%20for%20an%20ohmic%20heating%20process.pdf Toudeshki, Arash Mohammadi and Mariun, Norman and Hizam, Hashim and Bashi, Senan Mahmood and Jamaludin, Hishamuddin (2008) Variable high frequency voltage source for an ohmic heating process. In: 2008 IEEE 2nd International Power and Energy Conference (PECon 2008), 1-3 Dec. 2008, Johor Bahru, Malaysia. (pp. 594-598). 10.1109/PECON.2008.4762545
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Heating is an important step in food processing. A new method of heating uses the natural electrical resistance of the food to generate heat. In this method electrical energy is transformed into thermal energy. This kind of food heating processing operation is called ohmic heating. The rate of ohmic heating critically depends on the Electrical Conductivity of the food during the process. Reviewing a number of researches shows that the usage of direct current for ohmic heating process causes electrolyze in liquid beverages. Moreover, usage of alternating current eliminates the probability of adverse electrochemical reaction. In addition, when the frequency increases, the risk of oxidation in electrodes will decrease. In this regard, for heating different kinds and sizes of food, it is necessary to have an electrical power source with variable output voltage and frequency. This research attempts to design and simulate the variable voltage and frequency electrical power source to feed a 10 kW ohmic heating process at high frequency (10 kHz). The ohmic heating load is simulated by three-phase resistive load. According to Joulepsilas first law, the temperature in heat generation process is closely related to electrical power and time of process. Hence, in this simulation, the value of temperature is controlled by value of power that is generated by current which flows through resistive load with control of the time period and the duty cycle. Furthermore, one of the most important things to have an effective ohmic heating process is supplying the continuous current during the process. The result of this study indicated a simple method to supply a continual current for load during the ohmic heating process.
format Conference or Workshop Item
author Toudeshki, Arash Mohammadi
Mariun, Norman
Hizam, Hashim
Bashi, Senan Mahmood
Jamaludin, Hishamuddin
spellingShingle Toudeshki, Arash Mohammadi
Mariun, Norman
Hizam, Hashim
Bashi, Senan Mahmood
Jamaludin, Hishamuddin
Variable high frequency voltage source for an ohmic heating process
author_facet Toudeshki, Arash Mohammadi
Mariun, Norman
Hizam, Hashim
Bashi, Senan Mahmood
Jamaludin, Hishamuddin
author_sort Toudeshki, Arash Mohammadi
title Variable high frequency voltage source for an ohmic heating process
title_short Variable high frequency voltage source for an ohmic heating process
title_full Variable high frequency voltage source for an ohmic heating process
title_fullStr Variable high frequency voltage source for an ohmic heating process
title_full_unstemmed Variable high frequency voltage source for an ohmic heating process
title_sort variable high frequency voltage source for an ohmic heating process
publisher IEEE
publishDate 2008
url http://psasir.upm.edu.my/id/eprint/47788/1/Variable%20high%20frequency%20voltage%20source%20for%20an%20ohmic%20heating%20process.pdf
http://psasir.upm.edu.my/id/eprint/47788/
_version_ 1643833982772576256
score 13.211869

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