Ohmic cooking of instant rice cake soup: energy efficiency and textural qualities

Salinee Soisungwan, Apinya Khampakool, Sang Guan You, Sung Hee Park

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

The potential of ohmic heating was investigated to cook instant rice cakes according to electric field strengths (9, 12, 15, 18 V/cm) and cooking times (60, 80, 100, 120 s). Customized ohmic heating system was equipped with ohmic cell, electrodes, thermocouple, proportional–integral–differential controller and data acquisition system. Heating rate significantly increased when electric field strengths increased. Heating rate was 12.1 °C/min at 9 V/cm, and was increased to 38.8 °C/min at 18 V/cm. The energy efficiency was evaluated in terms of system performance coefficient (SPC) energy efficiency. The best SPC energy efficiency was 0.65 at an electrical field strength of 18 V/cm. An electric field strength of 15 V/cm and an 80 s cooking time resulted in the most preferable hardness (7.73 N). Ohmic heating would be applicable to cook instant rice cakes, resulting in good energy efficiency and textural qualities.

Original languageEnglish
Pages (from-to)641-649
Number of pages9
JournalFood Science and Biotechnology
Volume29
Issue number5
DOIs
StatePublished - 1 May 2020

Keywords

  • Cooking
  • Energy efficiency
  • Ohmic heating
  • Rice cake
  • Texture

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